Academic literature on the topic 'Waste heat recovery chiller'
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Journal articles on the topic "Waste heat recovery chiller"
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Enoki, Koji, Fumi Watanabe, Atsushi Akisawa, and Toshitaka Takei. "Experimental Investigation of the Effect of Generator Temperature on the Performance of Solution Transportation Absorption Chiller." International Journal of Air-Conditioning and Refrigeration 25, no. 03 (September 2017): 1750028. http://dx.doi.org/10.1142/s2010132517500286.
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It is effective to recover waste heat to reduce primary energy consumption. From this point of view, we proposed and examined a new idea of heat transportation using ammonia–water as the working fluid in the system named the Solution Transportation Absorption chiller (STA). As waste heat sources are not necessarily located close to areas of heat demand, conventionally, absorption chillers are located on heat source side and produce chilled water that is transported to heat demand side through pipelines with an insulation. In contrast, the proposed system STA divides an absorption chiller into two parts. The generator and the condenser are located on heat source side while the evaporator and the absorber are on heat demand side. Both the conventional system and STA system satisfy the same boundary condition of heat recovery and heat supply to the demand side, STA can work for transferring thermal energy as the conventional system does even though the temperature of the media is ambient without an insulation. Our previous studies of the STA were based on the experimental investigation with the STA facility where the cooling power was 90[Formula: see text]kW (25.6 refrigeration ton) at the generator temperature 120[Formula: see text]C from 0[Formula: see text]m (normal absorption chiller) to 1000[Formula: see text]m. Thus, the Coefficient of Performance (COP) of STA was found to have almost the same value of 0.65 with conventional absorption chillers without depending on the transportation distances. The objective of this study is to examine the effect of generator temperature from 100[Formula: see text]C to 120[Formula: see text]C on the performance of solution transportation of ammonia–water solution, because the generator temperature is directly linked to the waste heat temperature, so its effect needs to be investigated. The experimental facility tested the performance with 0[Formula: see text]m (normal absorption chiller), 200[Formula: see text]m and 500[Formula: see text]m distance. The results indicate that the effect of the generator temperature and solution transportation distances showed no significant on the COP.
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Amiri, Leyla, Edris Madadian, Navid Bahrani, and Seyed Ali Ghoreishi-Madiseh. "Techno-Economic Analysis of Waste Heat Utilization in Data Centers: Application of Absorption Chiller Systems." Energies 14, no. 9 (April 24, 2021): 2433. http://dx.doi.org/10.3390/en14092433.
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Modern data centers are playing a pivotal role in the global economic situation. Unlike high-quality source of waste heat, it is challenging to recover the decentralized and low-quality waste heat sourced from data centers due to numerous technological and economic hurdles. As such, it is of the utmost importance to explore possible pathways to maximize the energy efficiency of the data centers and to utilize their heat recovery. Absorption chiller systems are a promising technology for the recovery of waste heat at ultra-low temperatures. In fact, the low temperature heat discharged from data centers cannot be retrieved with conventional heat recovery systems. Therefore, the present study investigated feasibility of waste heat recovery from data centers using an absorption chiller system, with the ultimate goal of electrical energy production. To fulfill this objective, a techno-economic assessment of heat recovery using absorption chiller (AC) technique for the data centers with power consumption range of 4.5 to 13.5 MW is performed. The proposed AC system enables saving electricity for the value of 4,340,000 kWh/year and 13,025,000 kWh/year leading to an annual reduction of 3068 and 9208 tons CO2 equivalent of greenhouse gas (GHG) emissions, respectively. The results of this study suggest an optimum change in the design of the data center while reducing the payback period for the investors.
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Paula, V. B., A. Chun, B. M. Miotto, C. C. M. Cunha, and J. J. C. C. S. Santos. "ALTERNATIVE DESIGN AND ECONOMIC FEASIBILITY OF AN EXPERIMENTAL WHR FOR INTAKE AIR CONDITIONING OF A LARGE INTERNAL COMBUSTION ENGINE." Revista de Engenharia Térmica 19, no. 2 (December 21, 2020): 31. http://dx.doi.org/10.5380/reterm.v19i2.78611.
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This work presents an alternative design for an experimental waste heat recovery thermal system to be coupled to a large turbocharged internal combustion engine for combustion air conditioning. The goal is to carry out a design of a new thermal system under restricted economic requirements for one of the generators set of Luiz Oscar Rodrigues de Melo Thermoelectric Power Plant. Thereby, a comparison with the original proposal from previous works is also developed in order to demonstrate the differences in terms of thermo-economic design parameters. The waste recovery thermal system produces sufficient chilled water through a single-effect absorption chiller, powered by hot water which is produced by recovering the exhaust gases residual heat to supply cooling applications on the combustion air. The results showed a significant reduction for the chiller capacity demand, from 550 to 185 RT, that would be enough to provide chilled water for 98.72% of the analyzed operation historical period. The economic feasibility indicators reveal the proposal for the alternative waste heat recovery system as the best financial option, presenting a lower investment cost (US$316,793.27 of savings) and a time for capital recovery of 2.14 years, 1.61 years shorter when compared with the initial WHR system.
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Alsarayreh, Ahmad A., Ayman Al-Maaitah, Menwer Attarakih, and Hans-Jörg Bart. "Energy and exergy analysis of combined cooling and power system using variable mode adsorption chiller." E3S Web of Conferences 294 (2021): 03002. http://dx.doi.org/10.1051/e3sconf/202129403002.
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Adsorption cooling is a promising technology to recover low-temperature waste heat from a diesel genset. In this paper, an advanced adsorption chiller working in variable mode is proposed for the combined cooling and power cycle (CCP) to recover waste heat from the water jacket in the diesel genset. The chiller works on three modes based on the ambient temperature for better heat utilization. In this study, three modes were investigated: single-stage cycle mode, short-duration, and medium-duration mass recovery modes. The results show that the energy and exergy efficiency for a single-stage cycle mode is higher at an ambient temperature lower than 35 °C . In comparison, the mass recovery mode has a higher energy and exergy efficiency at an ambient temperature higher than 35 °C. The annual energy and exergy efficiency for the CCP was investigated when the chiller works with variable modes based on the ambient temperature under DUBAI weather conditions as a case study. The results show an improvement of 14.7% and 14% of the energy and exergy efficiency, respectively, for CCP with a variable mode adsorption chiller compared to diesel genset alone. The results also show the CCP with variable mode adsorption chiller has a slight improvement on both energy and exergy efficiency compared to CCP with a single-stage adsorption chiller at the same ambient conditions.
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Radchenko, R., M. Pyrysunko, M. Bogdanov, and Yu Shcherbak. "A new approach to increasing the efficiency of the ship main engine air waste heat recovery cooling system." Refrigeration Engineering and Technology 55, no. 1 (February 10, 2019): 22–27. http://dx.doi.org/10.15673/ret.v55i1.1349.
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The efficiency of integrated cooling air at the intake of Turbocharger and Scavenge air at the inlet of working cylinders of the main diesel engine of dry-cargo ship by transforming the waste heat into a cold by an Refrigerant Ejector Chiller (ECh) as the most simple in design and reliable in operation and by complex in design but more efficient Absorption Lithium-Bromide Chiller (ACh) was analyzed. A ship power plant of cogeneration type using the relatively low-grade heat of water of a heat supply system with a temperature of about 90 °C, that significantly complicates the problem of its conversion into cold were considered. Because of the insufficiently high efficiency of transformation of the heat of hot water (low coefficient of performance) as compared with steam, the resulting cooling capacity may not be enough for cooling intake air of the turbocharger and scavenge air, that raises the problem of the rational distribution of heat loads between the Turbocharger Intake Air cooling circuit (subsystem) and Scavenge air cooling circuit and the need to use chillers of various types. This takes into account the rational parameters of cooling processes of the scavenge air in the cogeneration high-temperature stage of scavenge air cooler, in the intermediate stage of traditional cooling air with seawater, and in the low-temperature stage for deep cooling of the scavenge air by using a chiller. A new approach is proposed to improve the efficiency of integrated cooling Intake Air of the turbocharger and Scavenge Air at the inlet of the working cylinders of the ship main engine of a transport ship, which consists in comparing the required cooling capacity and the corresponding heat needs during the trade route with the available heat of exhaust gases and scavenge air of the cogeneration power plant, determining the deficit and excess cooling capacity of heat utilizing cooling machines of various types, that allows to identify and realize the reserves of improving the efficiency of cooling intake air of the turbocharger and the scavenge air of the main diesel engine through the joint use of chillers of various types.
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Радченко, Микола Іванович, Євген Іванович Трушляков, Богдан Сергійович Портной, Сергій Анатолійович Кантор, and Ян Зонмін. "ПОРІВНЯННЯ ХАРАКТЕРИСТИК ГЛИБОКОГО ОХОЛОДЖЕННЯ ПОВІТРЯ НА ВХОДІ ГТУ ДЛЯ РІЗНОГО ТИПУ КЛІМАТУ." Aerospace technic and technology, no. 1 (January 25, 2020): 12–16. http://dx.doi.org/10.32620/aktt.2020.1.02.
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The efficiency of deep air cooling at the inlet of gas turbine units has been investigated for changed climatic conditions of operation during the month. For air cooling, the use of waste heat recovery chiller has been considered, which transform the heat of exhaust gases of gas turbine units into the cold. The efficiency of air cooling at the inlet of gas turbine units to different temperatures has been analysed: to 15°C – an absorption lithium-bromide chiller, which is used as the first pre-cooling stage of ambient air and down to 10°C – a combined absorption-ejector chiller, with ejector refrigerant chiller as the second stage of air cooling.The air cooling efficiency is estimated for different climatic conditions: a temperate climate on the example of Odessa (Ukraine) and a subtropical climate for Guangzhou (China). The subtropical climate peculiarity of Guangzhou is the high relative humidity of the air, respectively, and its moisture contents at the same time its high temperatures. As an indicator, when evaluating the efficiency of air cooling at the inlet of gas turbine units to 15°C in an absorption lithium-bromide chiller and deep cooling of air to 10°C in a combined absorption-ejector chiller, the specific fuel consumption reduced has been used. In this case, the needs for specific production of refrigeration capacity and specific capacity of cooling towers for cooling waste heat recovery chillers when cooling air to different temperatures are compared. It is shown that, through extremely different thermal and humidity parameters of ambient air, its cooling at the inlet of gas turbine units to 10ºС for the climatic conditions of Ukraine provides the current decrease in specific fuel consumption due to deeper cooling of the air at the inlet of the GTU in 1.6 ... 1.7 times compared with cooling to 15ºС, and for climatic conditions of the PRC - 1.4 ... 1.45 times. However, it should be noted that a deeper cooling of the air at the inlet of the gas turbine unit to a temperature of 10°C in a combined absorption-ejector chiller compared to its traditional cooling to 15°C in an absorption bromine-lithium chiller requires an increase in the required specific amount of cold by 1.7 ... 2, 0 times and the required specific capacity of cooling towers for cooling chillers by 2.6 ... 3.0 times for the climatic conditions of Ukraine, while for China - 1.25 ... 1.3 and 1.5 ... 1.6 times, respectively.
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Sultana, T., and MZI Khan. "The Effect of Thermal Conductance of Evaporator on Performance of a Two Stage Adsorption Chiller (Reheat) with Different Mass Allocation." Dhaka University Journal of Science 62, no. 2 (February 8, 2015): 133–39. http://dx.doi.org/10.3329/dujs.v62i2.21978.
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Now a days, adsorption heat pumps receive considerable attention as they are energy savers and environmentally benign. Silica gel/water based adsorption cycles have a distinct advantage in their ability to be driven by heat of near-ambient temperature so that waste heat below 100 °C can be recovered. One interesting feature of refrigeration cycles driven by waste heat is that they do not use primary energy as driving source. In the present paper, an analytic investigation of a two-stage adsorption refrigeration chiller using re-heat with different mass allocation was performed to determine the influence of the thermal conductance of evaporator as well as the heat source temperature on the chiller performance. Result shows that cycle performance is strongly influenced by large thermal conductance values of the evaporator. Besides it is observed that the chilled water outlet has lower value for comparatively higher value of heat source temperature. DOI: http://dx.doi.org/10.3329/dujs.v62i2.21978 Dhaka Univ. J. Sci. 62(2): 133-139, 2014 (July)
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Radchenko, A. M., Y. Zongming, and B. S. Portnoi. "Analyzing the efficiency of moderate and deep cooling of air at the inlet of gas turbine in various climatic conditions." Refrigeration Engineering and Technology 55, no. 1 (February 10, 2019): 34–39. http://dx.doi.org/10.15673/ret.v55i1.1351.
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The efficiency of deep cooling air at the inlet of gas turbine unite to the temperature of 10 °С by waste heat recovery combined absorption-ejector chiller was analyzed in climatic conditions at Kharkov site, Ukraine, and Beijing site, China, and compared with the moderate cooling to the temperature of 15°C in traditional absorption lithium-bromide chiller. The refrigerant ejector chiller is chosen as the most simple and reliable in operation chiller. It was used as the low-temperature stage for subcooling the air precooled in absorption lithium-bromide chiller to the temperature about 15 °C. Both waste heat recovery absorption lithium-bromide chiller and ejector chiller use the heat of gas turbine unite exhaust gas to produce a cooling capacity. Air cooling at the inlet of gas turbine unite was investigated for varying climatic conditions during the year. The current values of temperature depression with cooling ambient air to different temperatures of 10 °C and 15 °C and corresponding cooling capacities required were calculated. The comparison of the effect due to gas turbine unite inlet air cooling was performed by annual fuel saving and power production growth. With this the current values of turbine power output increase and specific fuel consumption decrease due to cooling inlet air from current varying ambient temperatures to the temperatures of 10 °C and 15 °C were calculated. It was shown that annual fuel saving and power production growth have increased by 1,8 times for Kharkov (Ukraine) site climatic conditions and by 1,6 times for Beijing (China) site due to deep cooling air to the temperature of 10 °C by absorption-ejector chiller as compared with cooling inlet air to the temperature of 15 °C by absorption lithium-bromide chiller.
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Chen, Chai-Phing, Siaw-Paw Koh, Sieh-Kiong Tiong, Jian-Ding Tan, and Albert Yu-Chooi Fong. "A heat waste recovery system via thermoelectric generator." Indonesian Journal of Electrical Engineering and Computer Science 16, no. 2 (November 1, 2019): 586. http://dx.doi.org/10.11591/ijeecs.v16.i2.pp586-590.
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<span>Be it in the power production or consumption end, improvement on the power efficiency has become one of the most pivoting research topics over the past few decades. In order to reduce the reliance on fossil fuels and negative impacts on the environment, many ways are found to show promising results to increase power efficiency. One of the most effective ways is to recover and reuse heat waste. In this research, a heat waste recovery system is proposed by using thermoelectric generators (TEGs). This proposed heat recovery system can be implemented at the exhaust or the chiller section of a power system to abstract the excessive and unwanted heat and reuse it before it dissipates into the environment or goes to waste. Experiments are setup and conducted with controlled heat levels to investigate the performance of the proposed system in converting heat waste into electricity under different temperatures. The results show that the generated power hikes as the heat set-points increase from 30°C to 240°C. The output power fluctuates and shows no significant increase as the temperature increases from 240°C onwards. The maximum power is generated at 290°C. It can thus be concluded that the proposed system successfully generates electricity under different level of heat waste temperature. In time to come, this research can further explore the possibility on the optimization of the generated power.</span>
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He, Zhilong, Xiaolin Wang, and Hui Tong Chua. "Performance Study of a Four-Bed Silica Gel-Water Adsorption Chiller with the Passive Heat Recovery Scheme." Mathematical Problems in Engineering 2015 (2015): 1–10. http://dx.doi.org/10.1155/2015/634347.
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Adsorption chiller technology is one of the effective means to convert waste thermal energy into effective cooling, which substantially improves energy efficiency and lowers environmental pollution. This paper uses an improved lump-parameter design model to theoretically and experimentally evaluate the efficacy of the passive heat recovery scheme as applied to a four-bed adsorption chiller. Results show that the model can accurately track the experimental temporal system outlet temperatures. The performance predictions from this model compare favourably with experimental results. At rated temperature conditions and over a wide range of cycle times, both the cooling capacity and COP can be predicted to within 12.5%. The analyses indicate that the model can be used confidently as a design tool for a four-bed adsorption chiller and the passive heat recovery scheme can effectively improve the system performance.
Dissertations / Theses on the topic "Waste heat recovery chiller"
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Oluleye, Oluwagbemisola Olarinde. "Integration of waste heat recovery in process sites." Thesis, University of Manchester, 2016. https://www.research.manchester.ac.uk/portal/en/theses/integration-of-waste-heat-recovery-in-process-sites(ebbc2669-2c9b-40be-9eae-8d2252f0286f).html.
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Exploitation of waste heat could achieve economic and environmental benefits, while at the same time increase energy efficiency in process sites. Diverse commercialised technologies exist to recover useful energy from waste heat. In addition, there are multiple on-site and offsite end-uses of recovered energy. The challenge is to find the optimal mix of technologies and end-uses of recovered energy taking into account the quantity and quality of waste heat sources, interactions with interconnected systems and constraints on capital investment. Explicit models for waste heat recovery technologies that are easily embedded within appropriate process synthesis frameworks are proposed in this work. A novel screening tool is also proposed to guide selection of technology options. The screening tool considers the deviation of the actual performance from the ideal performance of technologies, where the actual performance takes into account irreversibilities due to finite temperature heat transfer. Results from applying the screening tool show that better temperature matching between heat sources and technologies reduces the energy quality degradation during the conversion process. A ranking criterion is also proposed to evaluate end-uses of recovered energy. Applying the ranking criterion shows the use to which energy recovered from waste heat is put determines the economics and potential to reduce CO2 emissions when waste heat recovery is integrated in process sites. This thesis also proposes a novel methodological framework based on graphical and optimization techniques to integrate waste heat recovery into existing process sites. The graphical techniques are shown to provide useful insights into the features of a good solution and assess the potential in industrial waste heat prior to detailed design. The optimization model allows systematic selection and combination of waste heat source streams, selection of technology options, technology working fluids, and exploitation of interactions with interconnected systems. The optimization problem is formulated as a Mixed Integer Linear Program, solved using the branch-and-bound algorithm. The objective is to maximize the economic potential considering capital investment, maintenance costs and operating costs of the selected waste heat recovery technologies. The methodology is applied to industrial case studies. Results indicate that combining waste heat recovery options yield additional increases in efficiency, reductions in CO2 emissions and costs. The case study also demonstrates that significant benefits from waste heat utilization can be achieved when interactions with interconnected systems are considered simultaneously. The thesis shows that the methodology has potential to identify, screen, select and combine waste heat recovery options for process sites. Results suggest that recovery of waste heat can improve the energy security of process sites and global energy security through the conservation of fuel and reduction in CO2 emissions and costs. The methodological framework can inform integration of waste heat recovery in the process industries and formulation of public policies on industrial waste heat utilization.
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Godawitharana, Sampath, and Rohitha Rajaratne. "Technical and Financial Viability of Utilizing Waste Heat for Chilled Water Production and Biomass for Heating Applications in Hospitality Industry." Thesis, KTH, Kraft- och värmeteknologi, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-101392.
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The purpose of the thesis is to determine the potential of lessening the high energy cost in the hospitality industry so that the industry could stay alive after a three decades of civil war in Sri Lanka. The hospitality industry is a significant contributor to the country’s economic growth. Tourism industry has much hope of recovering in the year 2010. Improved tourism would also benefit larger part of Sri Lankan population as they are directly and indirectly employed to serve the tourism industry. Sri Lanka has a high electricity production cost as it depends heavily on the imported fossil fuel. Survival of hospitality industry would depend on the manner in which the energy cost - the second highest overhead in hotels is managed. If the industry survives, Sri Lanka would receive more foreign exchange and thereby improve country’s foreign currency reserve which could contribute to high growth rate. As electricity production is mainly depending on thermal, the volatility of world crude oil prices is directly affecting the country’s electricity prices. However, low dependence on the grid would help the hospitality industry to mitigate the energy cost. As the electricity and diesel costs -the highest and the next - are considerable portions in energy cost in hospitality industry, the study aims to discuss the possible ways of mitigating such costs. Measurements done by the presenters found that the usage of electricity for air conditioning system does constitute most of the electricity consumption for a hotel whilst most of the diesel consumption is for thermal applications. If Air Conditioning (AC) can be operated without electricity and thermal applications could be operated using abundantly available alternative energy sources then the overall energy costs of hospitality industry could be reduced thereby making higher profits. This would ensure industry survives and country gets more foreign exchange. Study and calculations done by the presenters proved that operating of generators only for electricity production is not viable, due to high fossil fuel cost, however if its high exhaust temperature which is wasted otherwise, could be utilized for operation of absorption chillier then the dependence of grid electricity for air conditioning could be minimized. Further studies also revealed that if water cooled generator is used for such purpose instead of air cooled, and then the hot water requirement of hotel also could be fulfilled, thus mitigating the dependence of fossil fuel which is used otherwise for hot water production. Study also revealed that if thermal energy could be fed with biomass- Sri Lanka being a tropical country is blessed with abundantly available biomass - then the dependency on the fossil fuel for thermal applications could be avoided. This would not only mitigate the second highest energy cost for hotels but also create less carbon foot print, more environmental friendly and produce less noxious exhaust gases thereby creating an advertisement to attract tourists who longing to support green hotels
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Rojas, Tena Fernando, and Reber Kadir. "Waste Heat Recovery Modellering." Thesis, KTH, Förbränningsmotorteknik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-39923.
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SammanfattningI ett tidigare projekt, utfört under våren 2010, modellerades och simulerades en ånggenerator i GT-SUITE för att analysera och jämföra dess resultat med de faktiska motormätningarna. Projektet utfördes på Kungliga Tekniska Högskolan i Stockholm, på uppdrag av företaget som introducerat idén, Ranotor. Konceptet gick ut på att ersätta EGR-kylaren i en lastbilsmotor och med hjälp av Rankine cykeln försöka öka motorns verkningsgrad. Ånggeneratorn består av 48 mikro tuber, som alla innehåller vatten med högt tryck, vattnet värms upp av de varma avgaserna som letts in i ånggeneratorn. Detta gör att vattnet förångas och leds sedan för att driva en expander för att avlasta motorn.Huvudfokus i detta examensarbete har varit att modellera, studera och analysera ånggeneratorns prestanda i simuleringsprogrammet GT-SUITE. För att kunna göra detta måste ånggeneratorn, även kallad HRSG (Heat Recovery Steam Generator), modelleras från grunden med specifikationer från tillverkaren. En elementarmodell byggdes inledningsvis upp för att belysa beteendet av flödet inuti mikro tuberna och vilka parametrar som påverkar resultatet av simuleringarna. Senare gjordes även en komplett identisk modell av den verkliga ånggeneratorn. Modellen användes i ESC-cykeln och även för transienta körningar, där all indata är samlad från motormätningar på den verkliga ånggenerator, monterad på en DS1301, 6-cylinder 12 liter Scania diesel motor. För att kunna förbättra simuleringen av den kompletta modellen, gjordes en nedskalad modell som bara innehöll två tuber. Denna modell har samma dimensioner och egenskaper med den kompletta modellen, men fördelen med denna tvåtubs modell är den förkortade simuleringstiden.Inlopps parametrar såsom, vattenflöde, ångtryck, avgasflöde och avgastemperaturen togs från verkliga motormätningar. Samtliga parametrar varierar med tiden; detta gör det möjligt att göra en direkt jämförelse mellan den verkliga ånggeneratorn och den modellerade. Ångans och avgasernas temperatur samt tryckfallet över ångpannan är huvudparametrar som har jämförts med de verkliga mätningarna. Testkörningen är baserad på ESC-cykeln, European Stationary Cycle, som innehåller tolv lastpunkter och en tomgångspunkt. Jämförelser mellan den kompletta modellen och de faktiska provkörningarna visade följande: i det bästa fallet avviker ångans temperatur ~5% motsvarande 10°C. För det sämsta fallet är temperatur skillnaden ~20%, ca 40°C, övriga lastpunkter visar en felmarginal mellan 5-10% motsvarande 10-35°C. Tryckfallet över ångpannan visar en större felmarginal, vilket beror på mätningar under testkörningar där vissa filter var igen satta, därav uppmättes tryckfallet i vissa fall upp till 20 bar. I bästa fallet skiljer det ~1 % mellan simulering och verklighet, vilket är nästan identiskt, medan det i det sämsta falletskiljer uppemot 70 % som motsvarar 10 bar, övriga lastpunkter ligger i intervallet 10-15 % felmarginal, motsvarande 1-4 bar.Två tubs modellen beter sig som den kompletta modellen; avvikelsen mellan dessa modeller är 1-5% ~5-15°C i de flesta fallen, där skillnaden för det mesta liknar mätningarna. Värmeöverföringen, Reynolds tal, ångans effekt studeras i tvåtubs modellen. Analys av modellen visar att ~40-55 % av värmeöverföringen sker i fasomvandlingen, vilket var förvånande mycket och Reynolds tal ökar med ~450 % i denna region, från 1500 till ~6500, vilket tyder på en flödesövergångs fas. Ångans effekt varierar mellan 5-23 kW beroende på lastpunkt.Den slutliga modellen ger tillfredställande resultat och anses vara tillräckligt bra för vidare analys.AbstractIn a previous project, made in the spring of 2010, a steam generator was modelled and simulated in GT-SUITE, in order to analyze and compare with engine measurements. This was made at the Royal Institute of Technology in Stockholm, on behalf of the company that introduced this idea, Ranotor. The concept was to replace the EGR-cooler in a heavy duty engine and with help of the Rankine cycle, try to improve its efficiency. The steam generator consists of 48 micro tubes, all containing high pressured water, which in turn is heated by the warm exhausts that are led into the steam generator. This causes the water in the tubes to evaporate which propels an expander that will unload the engine.The main focus of this thesis is to model, study and analyze the performance of the steam generator built in the simulation program GT-SUITE. The steam generator, called Heat Recovery Steam Generator (HRSG), is modelled from scratch with the specifications of the manufacturer. An elementary model was initially made to highlight the behaviour of the flow inside the micro tubes and what parameters affect the outcome of the simulations. Finally a complete identical model was made of the actual steam generator. The model was used in an ESC-cycle and also for a transient cycle, where all the input data is gathered on engine measurements of the actual HRSG, mounted on a DS1301, 6-cylinder 12 litre Scania diesel engine. In order to improve the simulation of the complete model a downsized model, only containing two tubes, was made. This model has the same dimensions and properties as the complete model but the advantage of this double-tube model is the shortened simulation time.The inlet parameters to the model such as water mass flow, steam pressure, exhaust mass flow and exhaust temperature were taken from actual engine measurements. All the parameters vary due to time; this makes a comparison possible between the real steam generator and the modelled one. Steam temperature, exhaust temperature and pressure drop along the HRSG are the main parameters from the simulations that are compared to the actual measurements. The engine measurements are made based on the ESC-cycle, European Stationary Cycle, which contains twelve load points and one idle point. During comparison between the complete model and the engine measurements following is observed, in the best case the steam temperature differs ~ 5 %, equalling 10°C. In the worst case the temperature difference is ~20 %, which is approximately 40°C, the rest of the load points shows a margin of error between 5-10 % equalling 10-35 °C. Pressure drop along the HRSG is less accurate;this is due to an error during the measurement where some filters where clogged. Disparity in pressure drop is ~1% in best case, which is almost identical and ~70% in worst case, corresponding to approximately 10 bar, where rest of the load points shows a margin of error between 10-15% equalling 1-4 bar.The double-tube model behaves like the complete model; the difference between the models is 1-5 % in most cases ~5-15°C, where the difference is mostly closer to the measurements. Heat transfer, Reynolds number and steam power are taken and studied from the double tube model. Analyses of the models reviles that ~40-55 % of the heat transfer is in the transition phase, which is surprisingly much and Reynolds number increases by ~450% in the same region, from 1500 to ~6500 which indicates a flow transition phase. Steam power varies between 5-23 kW depending on load point.The final model shows satisfying result and therefore assumed to be good enough for further analyse.
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Razavinia, Nasimalsadat. "Waste heat recovery with heat pipe technology." Thesis, McGill University, 2010. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=94983.
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High grade energy, which is primarily derived from hydrocarbon fuels, is in short supply; therefore alternative energy sources such as renewable and recycled energy sources are gaining significant attention. Pyro-metallurgical processes are large consumers of energy. They in return generate large quantities of waste heat which goes un-recovered. The overall theme of this research is to capture, concentrate and convert some of this waste heat to a valuable form. The main objective is to characterize and develop heat pipe technology (some of which originated at McGill) to capture and concentrate low grade heat. Heat pipe employs boiling as the means to concentrate the energy contained in the waste heat and transfers it as higher quality energy. The distinct design features of this device (separate return line and flow modifiers in the evaporator) maximize its heat extraction capacity. During the testing the main limitations within the heat pipe were identified. Different test phases were designed throughout which the configuration of the system was modified to overcome these limitations and to increase the amount of extracted heat.L'énergie d'haut grade de nos jours est produite principalement à base de combustion d'hydrocarbure et les réserves de cette énergie deviennent de plus en plus rare, mais certaines énergies alternatives connues gagnent des forces parmi les marchés incluant les sources d'énergie renouvelables et recyclées. Les usines pyrométallurgiques sont des consommateurs significatifs d'énergie d'haut grade. Ces procédés industriels relâches un montant important de chaleurs (perte) à l'environnement sans aucune récupération. Le but du projet est de concentrer, capturer et convertir cette chaleur résiduelle de basse qualité en énergie valable. Par contre, l'objectif principal du projet comme tel est de développer et de perfectionner un caloduc capable d'extraire cette chaleur parvenant des gaz effluents. Le point d'ébullition d'une substance (vapeur) est utilisé comme moyen de concentrer l'énergie contenu dans les effluents avec la technologie des caloducs. Pour maximiser les gains énergétiques, la conception de ce caloduc en particulier utilise des canaux de retour indépendant ainsi qu'un modificateur de débit dans l'évaporateur, lui permettant d'extraire un niveau supérieur de chaleur. Pendant les essais lors du projet, les éléments limitants des systèmes de caloducs ont été identifiés. Les configurations du système ont été ajustées et modifiés dans la phase expérimentale d'essai pour surmonter ces limitations et maximiser l'extraction de chaleur.
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Hua, Lihong. "Heat exchanger development for waste water heat recovery." Thesis, University of Canterbury. Mechanical Engineering, 2005. http://hdl.handle.net/10092/6459.
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Hot water plays an import role in modem life. The consumption of hot water represents a significant part of the nation's energy consumption. One way of reducing the energy consumption involved, and hence the cost of that energy, is to reclaim heat from the waste warm water that is discharged to the sewer each day.
The potential for economic waste water heat recovery depends on both the quantity available and whether the quality fits the requirement of the heating load. To recover heat from waste water in residential and commercial buildings is hard to achieve in quality because of its low temperature range. Nevertheless, efforts to recycle this waste energy could result in significant energy savings.
The objective of this research was to develop a multiple panel thermosyphon heat exchanger for a waste water heat recovery system. The advantage of the system proposed in this work is that it not only provides useful energy transfer during simultaneous flow of cold supply and warm drain water but also has the ability to store recovered energy at the bottom of a hot water storage tank for later use. While this concept is not new, the design of the heat exchanger proposed for the present study is significantly different from those used previously.
Component experiments were carried out to determine the performance characteristics of a single thermosyphon panel. By changing the inclination angle of the single panel heat exchanger and varying its working condition, it was found that the inclination angle of 10° could be identified as the minimum inclination angle at which good performance was still obtained. The close values of the overall heat transfer coefficients between top surface of the panel insulated and both top and bottom surfaces of the panel uninsulated shows that the overall heat transfer coefficient of the single panel was dominated by the bottom surface of the panel. Even if in a worst case the top surface of the panel might be possibly covered by the deposits from the waste water, it would not affect much on the heat transfer performance of the panel.
Measurements of hot water usage and waste water temperature and flow rates were obtained for a potential application of the proposed exchanger (the dishwasher for the kitchen in the University Halls of Residence).
A model of a multi-panel thermosyphon heat exchanger was also developed to predict the energy savings that would be expected if such a heat exchanger was used in this situation.
The result indicated that an overall electricity of 7500 kWh could be saved annually from the dishwasher system by employing a four-panel thermosyphon heat exchanger.
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Aguilar, Alex. "Harnessing thermoacoustics for waste heat recovery." Thesis, Massachusetts Institute of Technology, 2020. https://hdl.handle.net/1721.1/130213.
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Thesis: S.B., Massachusetts Institute of Technology, Department of Mechanical Engineering, September, 2020Cataloged from student-submitted PDF of thesis.
Includes bibliographical references (pages 25-26).
Environmental concerns and economic incentives have created a push for a reduction in emissions and an increase in efficiency. The U.S. Department of Energy estimates that 20 to 50% of the energy consumed in manufacturing processes is lost in some form to waste heat. The purpose of this study is to review the waste heat recovery technologies currently available in both commercial and research applications to determine how thermoacoustics may serve a role in furthering the use of waste heat recovery units. A literary review of the most common waste heat recovery units was compiled to determine the advantages and disadvantages of the different technologies by comparing components and their governing processes. An existing model of a thermoacoustic converter (TAC) was reviewed and a conceptual analysis written to suggest improvements for future experimental designs.
by Alex Aguilar.
S.B.
S.B. Massachusetts Institute of Technology, Department of Mechanical Engineering
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Lemaire, Lacey-Lynne. "Miniaturized stirling engines for waste heat recovery." Thesis, McGill University, 2012. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=107690.
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Portable electronic devices have made a profound impact on our society and economy due to their widespread use for computation, communications, and entertainment. The performance and autonomy of these devices can be greatly improved if their operation can be powered using energy that is harvested from the ambient environment. As a step towards that goal, this thesis explored the feasibility of developing miniaturized Stirling engines for harvesting waste heat. A mesoscale (palmtop-size) gamma-type Stirling engine, with a total volume of about 165 cubic centimeters, was manufactured using conventional machining techniques. The engine was able to sustain steady-state operation at relatively low temperature differentials (between 20 degrees Celsius and 100 degrees Celsius) and generated a few millijoules of mechanical energy at frequencies ranging from 200 to 500 revolutions per minute. Subsequently, the gamma-type engine was transformed into a Ringbom engine; and its operation was compared with the predictions of an analytical model available in the literature. The experience gained from these studies provides some guidelines for further miniaturization of Stirling engines using microfabrication technologies.Les appareils électroniques portatifs ont définitivement laissé un impact sur notre société et économie par leur utilisation fréquente pour le calcul, les communications et le divertissement. La performance et l'autonomie de ces appareils peuvent s'améliorer grandement si leur exploitation fonctionne en utilisant l'énergie récoltée de l'environnement. Pour s'orienter vers ce but, cette thèse a exploré si le développement d'un moteur Stirling fonctionnant sur l'énergie résiduelle était faisable. Un moteur Stirling de configuration 'gamma', de la grandeur d'une paume de main, avec un volume d'environ 165 centimètres cubes, a été fabriqué en utilisant des techniques conventionnelles d'usinage. Ce moteur a été capable de soutenir l'opération constante et stable à des différences en température relativement basses (entre 20 degrés Celsius et 100 degrés Celsius). De plus, il a produit quelques milli-Joules d'énergie mécanique à des fréquences entre 200 et 500 révolutions par minute. Par la suite, le moteur Stirling de configuration 'gamma' a été transformé en un moteur Ringbom. Par après, l'opération de ce moteur a été comparée à des prédictions basées sur un modèle analytique disponible dans la littérature. Les informations recueillies durant cette étude ont fourni certaines directives pour la miniaturisation éventuelle d'un moteur Stirling en utilisant des techniques de microfabrication.
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Gibbons, Jonathan S. (Jonathan Scott) 1979, and Stephen V. 1982 Samouhos. "Mobile power plants : waste body heat recovery." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/32814.
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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2004.Includes bibliographical references.
Novel methods to convert waste metabolic heat into useful and useable amounts of electricity were studied. Thermoelectric, magneto hydrodynamic, and piezo-electric energy conversions at the desired scope were evaluated to understand their role and utility in the efficient conversion of waste body heat. The piezo-electric generator holds the most promise for the efficient conversion of waste body heat into electricity. In the future, this same device could be easily extended into a combustion based power plant. An experimental apparatus investigating the use of magneto hydrodynamics was designed, built, and tested. A room temperature liquid inetal was propelled through a magneto hydrodynamic channel of 4 inches by 0.1875 inches at a rate of 10 mL/s. A 2 T induction field was applied within the channel. However, the results of the analysis did not find the magneto hydrodynamic device to be an effective electric generator at the scale tested.
by Jonathan S. Gibbons and Stephen V. Samouhos.
S.B.
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Sapa, Ihor. "Waste heat recovery in the ceramic industry." Master's thesis, Universidade de Aveiro, 2013. http://hdl.handle.net/10773/11827.
Full textAbstract:
Mestrado em Sistemas Energéticos SustentáveisEste trabalho tem como objetivo principal constituir um contributo para a sistematização e análise das diferentes opções disponíveis para a recuperação de calor residual na indústria cerâmica, através do desenvolvimento e aplicação de uma metodologia para a incorporação eficiente de tecnologias de recuperação de calor residual. Com base na revisão da literatura, a metodologia proposta fornece bases para a identificação e caracterização das fontes de calor residual presentes na indústria cerâmica, bem como apresenta a revisão e análise de aplicabilidade das tecnologias de recuperação de calor mais comuns e inerentes a este sector. A demonstração e aplicação da metodologia proposta foi desenvolvida no âmbito de um estágio extracurricular numa unidade fabril portuguesa do setor cerâmico - TopCer - integrado no programa Galp 202020@UA. O estudo de caso desenvolvido revelou a importância da recuperação de calor como uma das ferramentas para a melhoria da eficiência energética no sector cerâmico no sentido de obter uma vantagem competitiva. A revisão bibliográfica sobre recuperação de calor demonstrou que esta área do conhecimento tem apresentado um crescimento significativo em termos de número de publicações quase duplicando em número de 2011 para 2012, o que ilustra o crescente interesse da comunidades científica e tecnológica por este tema. A metodologia proposta tendo o setor da indústria cerâmica como ponto de partida, é suficientemente robusta para poder ser facilmente adaptada a outras indústrias que procuram soluções de poupança de energia através da valorização de calor residual.
This work aims to be a contribution to the systematization and analysis of the different options available for waste heat recovery in the ceramic industry, through the development and application of a methodology for incorporating efficient technologies in waste heat recovery in the industrial process. Based on a review of the literature, the proposed methodology provides the bases for the identification and characterization of waste heat sources in the ceramics industry, and presents a review and analysis of the applicability of the available technologies for heat recovery, most common and inherent in this sector. The demonstration and application of the proposed methodology was developed at a Portuguese ceramic manufacturing unit – TopCer – as part of an extracurricular internship under Galp 202020@UA program. The undertaken case study revealed the importance of heat recovery as a tool for improving energy efficiency in the ceramic sector in order to gain competitive advantage. The literature review on the waste heat recovery has demonstrated that this area has suffered a significant increase in terms of number of publications in 2012, illustrating the growing interest of scientific communities and practitioners in the heat recovery problems. The elaborated methodology for waste heat recovery incorporation is a rather robust instrument and, therefore, it can be easily tailored to other industries looking for energy saving solutions though consideration of waste heat recovery options.
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Harman, Thomas David V. "Waste heat recovery in data centers ejector heat pump analysis /." Thesis, Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/26594.
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Thesis (M. S.)--Mechanical Engineering, Georgia Institute of Technology, 2009.Committee Chair: Dr. Yogendra Joshi; Committee Member: Dr. S. Mostafa Ghiaasiaan; Committee Member: Dr. Sheldon Jeter. Part of the SMARTech Electronic Thesis and Dissertation Collection.
Books on the topic "Waste heat recovery chiller"
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Dorgan, Chad B. Chiller heat recovery application guide. Atlanta, Ga: American Society of Heating, Refrigerating, and Air-Conditioning Engineers, 1999.
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Goldstick, Robert. Principles of waste heat recovery. Atlanta, Ga: Fairmont Press, 1986.
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Albert, Thumann, ed. Principles of waste heat recovery. Hemel Hempstead: Prentice-Hall, 1986.
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Meeting, American Society of Mechanical Engineers Winter. Heat transfer in waste heat recovery and heat rejection systems. New York (345 E. 47th St., New York 10017): ASME, 1986.
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Cole, William E. Fluidized-bed waste-heat recovery system development. Waltham, Mass: Thermo Electron Corp., 1987.
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Woodward, John B. Engine waste heat thermodynamics. Ann Arbor, MI: Sarah Jennings Press, 1985.
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Gettings, Mike. Heat recovery from high temperature waste gas streams. [London]: Energy Efficiency Office, 1987.
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Quantification process for waste heat recovery project - streamlined. Edmonton: Alberta Environment, 2007.
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Alberta. Scientific and Engineering Services and Research Division. Methods for the recovery and reuse of waste heat in some commercial operations. Edmonton, AB: Alberta Energy, Scientific and Engineering Services and Research Division, 1988.
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Patch, Keith D. Fluidized-bed waste-heat recovery system development: Final report. [Oak Ridge, Tenn: Office of Scientific and Technical Information, 1988.
Find full textBook chapters on the topic "Waste heat recovery chiller"
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Mehta, D. Paul. "Waste Heat Recovery." In Energy Management Handbook, 209–32. Ninth edition. | Louisville, Kentucky : Fairmont Press, Inc., [2018]: River Publishers, 2020. http://dx.doi.org/10.1201/9781003151364-8.
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Kaya, Durmuş, Fatma Çanka Kılıç, and Hasan Hüseyin Öztürk. "Waste Heat Recovery." In Energy Management and Energy Efficiency in Industry, 463–78. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-25995-2_17.
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Sengupta, Piyali, S. K. Dutta, and B. K. Choudhury. "Waste Heat Recovery Policy." In Energy, Environment, and Sustainability, 185–205. Singapore: Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-7509-4_11.
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Yang, Wen-Jei. "Recovery and Storage of Waste Heat." In Energy Storage Systems, 525–37. Dordrecht: Springer Netherlands, 1989. http://dx.doi.org/10.1007/978-94-009-2350-8_23.
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Ottie, Timothy W. "Other Opportunities for Waste Heat Recovery." In 47th Conference on Glass Problems: Ceramic Engineering and Science Proceedings, Volume 8, Issue 3/4, 181–87. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2008. http://dx.doi.org/10.1002/9780470320389.ch6.
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Yu, Miao, Maria S. Gudjonsdottir, Pall Valdimarsson, and Gudrun Saevarsdottir. "Waste Heat Recovery from Aluminum Production." In Energy Technology 2018, 165–78. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-72362-4_14.
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Kennel, Daniel, and Melanie Raimer. "Waste Heat Recovery - Marktsicht zur Technologieführerschaft." In Heavy-Duty-, On- und Off-Highway-Motoren 2015, 189–200. Wiesbaden: Springer Fachmedien Wiesbaden, 2018. http://dx.doi.org/10.1007/978-3-658-21583-5_13.
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Sengupta, Prasunjit. "Refractories for Boiler and Waste Heat Recovery." In Refractories for the Chemical Industries, 303–16. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-61240-5_12.
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Nakano, Jinichiro, James Bennett, and Anna Nakano. "Energy Generation From Waste Slags: Beyond Heat Recovery." In Rewas 2016: Towards Materials Resource Sustainability, 129–36. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2016. http://dx.doi.org/10.1002/9781119275039.ch19.
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Norton, John. "Waste Heat Recovery in the Aluminum Melting Furnaces." In Energy Technology 2011, 49–53. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2011. http://dx.doi.org/10.1002/9781118061886.ch5.
Full textConference papers on the topic "Waste heat recovery chiller"
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Bailey, Caitlin J., and James S. Wallace. "Heat Recovery From a Microturbine System." In ASME 2010 4th International Conference on Energy Sustainability. ASMEDC, 2010. http://dx.doi.org/10.1115/es2010-90316.
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Previous study of a microturbine-based combined heat, cooling and power system installed on a university campus showed that the turbine exhaust energy must be fully utilized for the economics to be favorable. The system studied combined four 60 kW microturbines with a 110 ton absorption chiller that recovers exhaust waste heat. The chiller, which has the capability of providing either chilled water for cooling or hot water for heating depending on seasonal needs, was found to be mismatched to the local heating and cooling needs. This paper describes the design of an exhaust heat exchanger that will be integrated into the campus steam plant for more efficient utilization of the microturbine waste heat. The hot water generated will be used during heating season to heat a nearby building with a hydronic heating system. This will reduce boiler fuel costs, since this heating load would otherwise be met from a steam heating station. At other times of the year, the hot water generated will be used to preheat condensate return for the campus steam plant, which has a year-round steam demand.
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Ja¨a¨skela¨inen, Hannu E., and James S. Wallace. "Thermal Performance of a Combined Heat, Cooling, and Power Microturbine System." In ASME 2009 3rd International Conference on Energy Sustainability collocated with the Heat Transfer and InterPACK09 Conferences. ASMEDC, 2009. http://dx.doi.org/10.1115/es2009-90410.
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A 240 kWe integrated microturbine chiller/heater system was installed on the campus of the University of Toronto at Mississauga in 2005 to provide heating or cooling in combination with electric power generation. The system consists of four 60 kWe microturbines fueled by natural gas and a 110 ton lithium bromide absorption chiller that utilizes waste heat from the microturbines. The chiller can be operated in cooling mode to supply chilled water in summer for cooling or in heating mode to supply hot water (60°C) in winter for heating. Tests were conducted in both heating and cooling mode to evaluate the effectiveness of heat recovery and results are presented for both modes of operation. However, operating constraints imposed by this particular installation prevent full utilization of thermal output in both heating and cooling mode. Recommendations are provided to guide future installations to make full use of the equipment’s potential.
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Chun, Andre, Alexandre Morawski, LEONARDO ARAUJO, Renan Cristofori Lima de Oliveira, Marcelo Aiolfi Barone, Manuel Schiaffino, João L. M. Donatelli, José Joaquim Conceição Soares Santos, Carla César Martins Cunha, and Allan Valiati. "THERMOECONOMIC OPTIMIZATION OF ABSORPTION CHILLER SUPERSTRUCTURES FOR AN INTERNAL COMBUSTION ENGINE; WASTE HEAT RECOVERY AND COLD-WATER APPLICATIONS." In Brazilian Congress of Thermal Sciences and Engineering. ABCM, 2018. http://dx.doi.org/10.26678/abcm.encit2018.cit18-0571.
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Saidi, Karim, Ulrich Orth, Sven Boje, and Christian Frekers. "A Comparative Study of Combined Heat and Power Systems for a Typical Food Industry Application." In ASME Turbo Expo 2014: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/gt2014-26234.
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In the food industry, there is typically a requirement for electric power, process steam as well as cooling capability. Based on actual requirements of a specific site, a study was performed to define two different Combined Heat and Power (CHP) options and to compare them over a one year period regarding the extent to which they satisfy the operator’s needs. CHP is defined as the sequential generation of two different forms of usable energy from a single fuel source. It is mechanical energy and thermal energy. The mechanical energy may be used either to drive a generator to produce electricity, or to drive rotating equipment such as a compressor. Thermal energy can be used either directly for process applications or indirectly to produce steam, hot water (district heating), or chilled water for cooling purposes. Combined Heat and Power technologies are proven, reliable and cost-effective. MAN can offer different CHP concepts adapted to specific customer requirements. This paper presents the results of a comparative study based on the typical requirements of the food industry. The CHP system has to cover the demand for power, saturated steam at two pressure levels, and cooling. Two different CHP options were studied and compared regarding technical and economic considerations. The first system proposed is based on a MAN’s gas turbine (model: THM1304-10N) in the 10 MW class, a Waste Heat Recovery Unit for steam production and one Absorption Chiller (ammonia/water) for cooling process. A share of the steam produced is used for driving the chiller. The second system includes a combined cycle with MAN’s new MGT6100 gas turbine in the 6 MW class. A Waste Heat Recovery Unit and a back pressure steam turbine with two extractions at two intermediate pressure levels are used. A part of the saturated steam at the outlet of the steam turbine drives the absorption chiller and the remainder is used for the third steam process. For both options, a supplementary firing is also considered. A technical and economical comparison between the two solutions is provided in order to show the advantages and the disadvantages of each system with regard to the requirements of the specified application.
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Murata, Yukimaro, Tomohiko Horizoe, and Masahiro Oka. "Development of a Simulation Tool for Gas Co-Generation Systems." In ASME 1999 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/imece1999-0880.
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Abstract Tokyo Gas developed a new simulation tool for gas co-generation systems. We expect that this tool will help us in both developing co-generation components such as absorption chillers to utilize the waste heat of co-generation and making suggestion for optimum co-generation engineering. This simulation tool is superior to other simulation tools in simulation result accuracy and availability to complicated co-generation systems. It was achieved by new calculation logic and detailed description of features of co-generation components. This simulation tool can evaluate energy consumption and running cost of simulation models for buildings with co-generation systems. Tokyo Gas has used this simulation tool in development of three new gas absorption chiller heaters with auxiliary waste heat recovery and for energy consumption evaluation of many buildings with co-generation systems, which are so complicated that other simulation tools are not available.
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Little, Adrienne B., and Srinivas Garimella. "A New Energy Frugal Paradigm for Data Centers." In ASME 2010 International Mechanical Engineering Congress and Exposition. ASMEDC, 2010. http://dx.doi.org/10.1115/imece2010-39442.
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Of the total electricity consumption by the United States in 2006, more than 1% was used on data centers alone; a value that continues to rise rapidly. Of the total amount of electricity a data center consumes, at least 30% is used to cool server equipment. The present study conceptualizes and analyzes a novel paradigm consisting of integrated power, cooling, and waste heat recovery and upgrade systems that considerably lowers the energy footprint of data centers. Thus, on-site power generation equipment is used to supply primary electricity needs of the data center. The microturbine-derived waste heat is recovered to run an absorption chiller that supplies the entire cooling load of the data center, essentially providing the requisite cooling without any additional expenditure of primary energy. Furthermore, the waste heat rejected by the data center itself is boosted to a higher temperature with a heat transformer, with the upgraded thermal stream serving as an additional output of the data center with no additional electrical power input. Such upgraded heat can be used for district heating applications in neighboring residential buildings, or as process heat for commercial end uses such as laundries, hospitals and restaurants. With such a system, the primary energy usage of the data center as a whole can be reduced by about 23 percent while still addressing the high-flux cooling loads, in addition to providing a new income stream through the sales of upgraded thermal energy. Given the large and fast-escalating energy consumption patterns of data centers, this novel, integrated approach to electricity and cooling supply, and waste heat recovery and upgrade will substantially reduce primary energy consumption for this important end use worldwide.
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Sahm, Michael K., Jifeng Zhang, Timothy Wagner, and Sunghan Jung. "Optimal Integration of a Microturbine-Absorption Chiller Cooling, Heating and Power System for Highest Overall CHP System Value." In ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-62348.
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System level integration of an electrical power generating prime mover with a waste heat recovery thermally activated cooling technology is analyzed. Component and system level metrics for quantifying efficiency, performance and value are defined. Trades between component level metrics and system level metrics are performed and optimal integrated cooling, heating and power configuration characteristics and value sensitivity to integration parameters are quantified. Methods developed are extensible to other integrated prime mover and thermally activated technology system approaches.
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Bartolini, Carlo M., and Danilo Salvi. "Performance Assessment of Steam Injection Gas Turbine With Inlet Air Cooling." In ASME 1997 International Gas Turbine and Aeroengine Congress and Exhibition. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/97-gt-507.
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The steam generated through the use of waste heat recovered from a steam injection gas turbine generally exceeds the maximum mass of steam which can be injected into steam injection gas turbine. The ratio between the steam and air flowing into the engine is not more than 10–15%, as an increase in the pressure ratio can cause the compressor to stall. Naturally, the surplus steam can be utilized for a variety of alternative applications. During the warmer months, the ambient temperature increases and results in reduced thermal efficiency and electrical capacity. An inlet air cooling system for the compressor on a steam injection gas turbine would increase the rating and efficiency of power plants which use this type of equipment. In order to improve the performance of steam injection gas turbines, the authors investigated the option of cooling the intake air to the compressor by harnessing the thermal energy not used to produce the maximum quantity of steam that can be injected into the engine. This alternative use of waste energy makes it possible to reach maximum efficiency in terms of waste recovery. This study examined absorption refrigeration technology, which is one of the various systems adopted to increase efficiency and power rating. The system itself consists of a steam injection gas turbine and a heat recovery and absorption unit, while a computer model was utilized to evaluate the off design performance of the system. The input data required for the model were the following: an operating point, the turbine and compressor curves, the heat recovery and chiller specifications. The performance of an Allison 501 KH steam injection gas plant was analyzed by taking into consideration representative ambient temperature and humidity ranges, the optimal location of the chiller in light of all the factors involved, and which of three possible air cooling systems was the most economically suitable. In order to verify the technical feasibility of the hypothetical model, an economic study was performed on the costs for upgrading the existing steam injection gas cogeneration unit. The results indicate that the estimated pay back period for the project would be four years. In light of these findings, there are clear technical advantages to using gas turbine cogeneration with absorption air cooling in terms of investment.
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Ryan, Robert. "Electrical and CHP Efficiencies of a 1 MW University Fuel Cell Power Plant." In ASME 2009 3rd International Conference on Energy Sustainability collocated with the Heat Transfer and InterPACK09 Conferences. ASMEDC, 2009. http://dx.doi.org/10.1115/es2009-90373.
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A 1 MW fuel cell power plant began operation at California State University, Northridge (CSUN) in January, 2007. The power plant was installed on campus to complement a Satellite Chiller Plant which is being constructed in response to increased cooling demands related to campus growth. The power plant consists of four 250 kW fuel cell units, and a waste heat recovery system which produces hot water for the campus. The waste heat recovery system was designed by CSUN’s Physical Plant Management personnel, in consultation with engineering faculty and students, to accommodate the operating conditions required by the fuel cell units as well as the thermal needs of the campus. A unique plenum system, known as a Barometric Thermal Trap, was created to mix the four fuel cell exhaust streams prior to flowing through a two stage heat exchanger unit. The two stage heat exchanger uses separate coils for recovering sensible and latent heat in the exhaust stream. The sensible heat is being used to partially supply the campus’ building hot water and space heating requirements. The latent heat is intended for use by an adjacent recreational facility at the University Student Union. This paper discusses plant performance data which was collected and analyzed over a several month period during 2008. Electrical efficiencies and Combined Heat and Power (CHP) efficiencies are presented. The data shows that CHP efficiencies have been consistently over 60%, with the potential to exceed 70% when planned improvements to the plant are completed.
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Samanta, Indraneel, Ramesh K. Shah, and Ali Ogut. "An Investigation of DIR-MCFC Based Cooling, Heating and Power System." In ASME 2003 1st International Conference on Fuel Cell Science, Engineering and Technology. ASMEDC, 2003. http://dx.doi.org/10.1115/fuelcell2003-1742.
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The fuel cell is an emerging technology for stationary power generation because of their higher energy conversion efficiency and extremely low environmental pollution. Fuel cell systems with cogeneration have even higher overall efficiency. Cogeneration can be defined as simultaneous production of electric power and useful heat from burning of single fuel. A fuel cell produces electrical energy by electrolytic process involving chemical reaction between H2 (fuel) and O2 (Air). Previous works have focussed on running the system in combination with gas turbines. We investigate the possibility of running an absorption chiller as a cogeneration system focussing on a 250 kW Direct Internal Reforming Molten Carbonate Fuel Cell (DIR-MCFC) powering a LiBr-Water absorption chiller. The objective of this work is to propose a cogeneration system capable of enhancing the profitability and efficiency of a MCFC for independent distributed power generation. Natural gas is used as fuel and O2 is used from atmospheric air. Two possibilities are evaluated to recover heat from the exhaust of the MCFC: (1) all waste heat available being used for providing hot water in the building and powering an absorption chiller in summer, and (2) hot water supply and space heating in winter. There is an increased cost saving for each case along with improved system efficiency. Based on these considerations payback period for each case is presented.
Reports on the topic "Waste heat recovery chiller"
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Grieco, A. (Waste water heat recovery system). Office of Scientific and Technical Information (OSTI), May 1990. http://dx.doi.org/10.2172/6839699.
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Winiarski, David W. Analysis of IECC2003 Chiller Heat Recovery for Service Water Heating Requirement for New York State. Office of Scientific and Technical Information (OSTI), August 2004. http://dx.doi.org/10.2172/15020948.
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Winiarski, D. Analysis of IECC2003 Chiller Heat Recovery for Service Water Heating Requirement for New York State. Office of Scientific and Technical Information (OSTI), April 2004. http://dx.doi.org/10.2172/1779786.
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4
Jovovic, Vladimir. Thermoelectric Waste Heat Recovery Program for Passenger Vehicles. Office of Scientific and Technical Information (OSTI), December 2015. http://dx.doi.org/10.2172/1337561.
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Johnson, Ilona, William T. Choate, and Amber Davidson. Waste Heat Recovery. Technology and Opportunities in U.S. Industry. Office of Scientific and Technical Information (OSTI), March 2008. http://dx.doi.org/10.2172/1218716.
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Patch, K. D., and W. E. Cole. Fluidized-bed waste-heat recovery system development: Final report. Office of Scientific and Technical Information (OSTI), June 1988. http://dx.doi.org/10.2172/6411874.
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Hopman, Ulrich,, and Richard W. Kruiswyk. Diesel Engine Waste Heat Recovery Utilizing Electric Turbocompound Technology. Office of Scientific and Technical Information (OSTI), July 2005. http://dx.doi.org/10.2172/862432.
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Sweetser, Richard. Project to Develop and Demonstrate an Advanced Low Temperature Heat Recovery Absorption Chiller Module at a Distributed Data Center. Office of Scientific and Technical Information (OSTI), September 2014. http://dx.doi.org/10.2172/1086788.
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Webb, Stephen W., Charles W. Morrow, Susan Jeanne Altman, and Brian P. Dwyer. Water recovery using waste heat from coal fired power plants. Office of Scientific and Technical Information (OSTI), January 2011. http://dx.doi.org/10.2172/1008108.
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Subramanian, Swami Nathan. Affordable Rankine Cycle Waste Heat Recovery for Heavy Duty Trucks. Office of Scientific and Technical Information (OSTI), June 2017. http://dx.doi.org/10.2172/1375960.
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