Готові списки джерел за темами / FEED WATER HEATING

Добірка наукової літератури з теми "FEED WATER HEATING"

Автор: Grafiati

Опубліковано: 11 вересня 2023

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Статті в журналах з теми "FEED WATER HEATING"

Kinkaid, Thos W. "FEED-WATER HEATING." Journal of the American Society for Naval Engineers 4, no. 3 (March 18, 2009): 393–400. http://dx.doi.org/10.1111/j.1559-3584.1892.tb00942.x.

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Rogers, T. J. "FEED-WATER HEATING." Journal of the American Society for Naval Engineers 29, no. 2 (March 18, 2009): 394–97. http://dx.doi.org/10.1111/j.1559-3584.1917.tb00114.x.

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Dinger, H. C. "MARINE FEED-WATER HEATING." Journal of the American Society for Naval Engineers 26, no. 1 (March 18, 2009): 129–71. http://dx.doi.org/10.1111/j.1559-3584.1914.tb04739.x.

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ANDREWS, JAMES. "A NEW ASPECT OF FEED WATER HEATING." Journal of the American Society for Naval Engineers 43, no. 4 (March 18, 2009): 644–69. http://dx.doi.org/10.1111/j.1559-3584.1931.tb03784.x.

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Grzesiak, Szymon, and Andrzej Adamkiewicz. "Application of a Two-Stage Steam Jet Injector Unit for Latent Heat Recovery of a Marine Steam Turbine Propulsion Plant." Applied Sciences 11, no. 12 (June 14, 2021): 5511. http://dx.doi.org/10.3390/app11125511.

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The paper presents the results of the numerical research of the steam jet injector applications for the regenerative feed water heating systems of marine steam turbine propulsion plants. The analysis shows that the use of a single injector for a single heat exchanger results in a relative increase in the thermal efficiency of the plant by 0.6–0.9%. The analysis also indicates the legitimacy of the usage of multistage feed water heating systems, which would enable the operating parameters optimization of the injectors. The obtained steam pressure up to the value of 1.8 barA allows for the heating of the feed water up to 110 °C. For higher degrees of feed water heating in the heat exchangers, it is necessary to supply heating steam of higher pressure. Therefore, the usage of two-stage steam jet injector units was considered advisable for the analyses.

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Kaibara, Yasuyuki. "Feed Water Heating Using Circulating Cooling Water of the Condensing Turbine." JAPAN TAPPI JOURNAL 52, no. 11 (1998): 1534–38. http://dx.doi.org/10.2524/jtappij.52.1534.

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Daniel Ogbonna John Aja, Malachy Nwaeze Ezenwaeze, and Sylvester Onuegbunam Nweze. "Sub-chronic toxicity study of palm kernel oil and soya oil in albino Wister rats." International Journal of Biological and Pharmaceutical Sciences Archive 3, no. 2 (April 30, 2022): 009–19. http://dx.doi.org/10.53771/ijbpsa.2022.3.2.0030.

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Background: Vegetable oils are commonly used food additives. Aim: To characterize and observe the toxic effect of sub chronic consumption of heated and unheated Palm Kernel oil (PKO) and Soya Oil (S0) after heating at 180 ℃ and at room temperature in albino Wistar rats. Methodology: The physicochemical properties were analyzed, sixty rats were divided into five groups of twelve rats and their baseline weight recorded. Group 1 (controls), received water and feed only, while 10mls of each oil was added (add libitum) to 100 grams of feed in each test group for six weeks and twelve weeks. Group 2 received feed, water and unheated PKO and Group 3 received feed, water and heated PKO. Group 4 were given feed, water and unheated SO while group 5 had feed, water and heated SO. The lipid profile and blood glucose were measured at six weeks exposure while the renal function and liver function were determined at twelve weeks exposure. Result: Heating the oils at 180 ℃ for 15 minutes caused a decrease in relative density, peroxide values, and iodine values in both the PKO and SBO and increased acid values and free fatty acids in both with no effect in the refractive index. Biochemical result showed that both heated and the unheated oil samples significantly increased the LDL levels, HPKO and UHSO caused increase in total cholesterol levels, UHPKO significantly decreased the TAG, HPKO significantly increased the ALT, HPKO significantly decreased the urea level and HSO increased the BG significantly. Conclusion: Heating alters the physicochemical properties of the oils thereby decreasing their qualities, while the oils also demonstrated evidence of hyperlipidemia.

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Mitrović, Dejan, Marko Ignjatović, Branislav Stojanović, Jelena Janevski, and Jovan Škundrić. "ENERGY ANALYSIS OF REPOWERING STEAM POWER PLANTS BY FEED WATER HEATING." Facta Universitatis, Series: Mechanical Engineering 20, no. 1 (April 8, 2022): 053. http://dx.doi.org/10.22190/fume200218017m.

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Modern society and economic development are completely dependent on various forms of energy while the ever-increasing demand for energy, in combination with significant environmental topics, has resulted in state-of-the-art ideas and solutions for fulfilling these often-contradictory goals, i.e. increasing efficiency or environmental protection and economic goal. The efficiency of the existing operating units for electricity production based on the usage of low-quality coal does not go hand in hand with the requirements of this new concept.One of the most efficient ways to reduce specific energy consumption is using Combined Heat and Power plants. In comparison to classical, separate heat and power plants, the advantage for CHP plants comes from their high efficiency. The result of higher efficiency is lower primary energy consumption and lower environmental pollution due to low values of CO2 emissions.Several revitalization configurations can be applied in order to fit the existing thermal power plants into combined cycles. The idea is to install, at the existing location, one gas turbine to increase the overall efficiency. This paper analyzes the potential of a combined gas-steam facility in the situation where the gas facility is used for heating feed water, which enters the heat recovery steam generator.A comparison of energy efficiency for various operating regimes, with and without heat production, is performed for this option.

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IWAKI, Chikako, Michitsugu MORI, Tadashi NARABAYASHI, Syuichi OHMORI, and Yutaka ASANUMA. "3529 Endurance test of steam injector for feed-water heating system." Proceedings of the JSME annual meeting 2005.3 (2005): 215–16. http://dx.doi.org/10.1299/jsmemecjo.2005.3.0_215.

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Alam, Ahsan, Mubashir Ali Siddiqui, and Naveed ur Rehman. "Solar feed water heating feasibility for a conventional steam power plant." Journal of Mechanical Science and Technology 31, no. 7 (July 2017): 3573–80. http://dx.doi.org/10.1007/s12206-017-0644-9.

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Дисертації з теми "FEED WATER HEATING"

SHUKLA, NEERAJ KUMAR. "EVALUATION OF PARALLEL FEED WATER HEATING IN INTEGRATED SOLAR THERMAL POWER PLANT." Thesis, 2018. http://dspace.dtu.ac.in:8080/jspui/handle/repository/16308.

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The integration of steam power plant to solar thermal energy is a research area based on modern day challenges of higher power production with lower emission. The steam power plant solar integration can be done in many ways detailed in this project. One such method is to replace feed water heaters of a regenerative steam power plant with solar heating system. This is the most recent scheme and requites least modification in existing plant. It is also very flexible integration scheme as the control systems provide methods to operate plant in solar integrated mode as well as base mode. The analysis is done based on two methods; analytical method and simulation method. The analysis is performed by formulating entire case and then analyzing it with data available with on ‘Engineering Equation Solver’ (EES) software. The concept of solar thermal energy storage to increase overall efficiency of integrated model is also introduced and analyzed. This model is then simulated in ‘System Analyzer Model’ (SAM) software to get the trend analysis results of the project. The ‘Integrated Solar Thermal Power Plant, Dadri’ is chosen as the base model of this work. The solar thermal integration at this plant is modeled on ‘Compact Linear Fresnel Reflector’ (CLFR) Technology. In this work the CLFR is replaced with ‘Heliostat Field Collector’ (HFC). This model is having higher solar thermal collection efficiency as well as more heat available to aid the steam cycle. The solar thermal storage addition had added system ability to operate with integrated mode for a longer duration. Talking to the environmental front, this type of integrating with optimum integration mode had proved better on emission front. The carbon dioxide and sulphur dioxide emissions are reduced in the integrated mode as obtained from the analysis results. The other pollutants are also assumed to be reduced in the same pattern. In economical terms, the project is also analyzed on coal saving front. The hourly coal saving in different integration modes is provided. This shows the economical benefits of the project. Carbon dioxide emission reduction is also a good step to save carbon tax as well. Thus the benefits of such schemes are worth noting and further research should also be continued on the technology for betterment of existing results.

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Книги з теми "FEED WATER HEATING"

Water treatment specification manual. New York: McGraw-Hill, 1985.

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Rosa, Frank. Water treatment specification manual. 2nd ed. Troy, Mich: Business News Pub. Co., 1993.

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Closed Feedwater Heaters for Power Generation: A Working Guide. McGraw-Hill Education, 2014.

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Wolf, E. L. More about the Atmosphere, Molecules, and their Interaction with Radiation. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198769804.003.0007.

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Electric dipole radiation is possible from certain molecules (but not with diatomics like oxygen and nitrogen) to make them active in intercepting and re-radiating electromagnetic waves in the atmosphere. Molecules of the greenhouse gas variety include carbon dioxide, ozone and water, as discussed in this chapter. Molecular contributions to the greenhouse heat-trapping effect are described, including sophisticated satellite measurements. The role of molecular absorption in altering the ground-level solar spectrum absorbed by solar farms is summarized. In this chapter we provide a molecular basis for the absorption and emission from the atmosphere, first discussed in Chapter 3. This gives a better understanding of the solar spectrum as seen on Earth, that feeds photovoltaic devices as well as heating the Earth’s surface, that in turn creates winds and waves that can be harvested.

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Частини книг з теми "FEED WATER HEATING"

İsmail Tosun, Yıldırım. "Adsorption of Heavy Metals by Microwave Activated Shale/Asphaltite Char/Zeolite Granule Composts from Hazardous Sludges and Industrial Waste Slurries." In Clay Science and Technology [Working Title]. IntechOpen, 2020. http://dx.doi.org/10.5772/intechopen.94404.

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There is a great concern about surface water pollution with high level mercury, lead (Pb) over 10 mg/l, 30 mg/l to the fishing lakes and streams in Şırnak Province even contaminating fresh water fishing and poisonening of human by merury and lead in thr region. The chromium over 50 mg/l from industrial seepages was disposed to lakes and streams in our country. There is a great green concern prompting land in order to control acidic mine waters so that the research study controlled and avoided hazardous metal limits of residual stream contaminants of heavy metals by sorption local clay and zeolite compost. The contamination rate changes to those based on seepage concentrations and wetness. The stream amendments, such as shale char carbonized from Şırnak asphaltite containing 52–60% shale activated by acid washing under microwave radiation as geo material composted for waste water treatment should control contaminated effluents concentration. The field studies to evaluate the stability of heavy metal concentrations and salts were scarce. The initial objective of this study was to determine the effects of seepage flow to surface and groundwater from the industrial discharge. In this study, important investigations have been made on composite granules production with Şırnak shale char and zeolite feed in order to activated in microwave oven 2 M HCl dissolution. The compost sorbent for high level heavy metal sorption in laboratory water packed bed column adsorption compost system. However, the results of filled packed bed zeolite yield high metal transfer to compost. Due to the complex chemistry of shale pores, and high porosity, heat conduction improved in the microwave sorption depended on granule size decreased. The other heavy metal sorption distribution was changed in the activation dependent on the microwave heating power.

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Wood, D. A. "Solar Energy and its Multiple Applications." In Materials Research Foundations, 134–48. Materials Research Forum LLC, 2021. http://dx.doi.org/10.21741/9781644901410-6.

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Solar energy is commercially exploited to provide benefits in the form of various products and capabilities applying a range of technologies. Electricity generation is achieved either directly from photovoltaic cells made of various materials or indirectly through the steam production from concentrating solar thermal systems. Whereas solar thermal power generation requires large scale plants, photovoltaic systems can be large or small in scale and building integrated, if required. Both types of generation can be standalone or connected to power grids. Solar energy is also extensively used for water and space heating, cooling and drying purposes. It can also be stored and/or transformed into a range of clean fuels and contributes energy to the manufacture of various energy-intensive products. The research into the artificial photosynthetic synthesis of biofuels although encouraging is, however, yet to be achieved commercially exploited on a large scale. Much scope remains for innovative technology breakthroughs to further improve the efficiency and uptake of all the solar energy technologies currently exploited or under investigation. Policy frameworks, renewable portfolio standards, feed-in tariffs and net-metering play an important and ongoing role in promoting the uptake of photovoltaics in particular.

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Stephens, Graeme. "Cirrus, Climate, and Global Change." In Cirrus. Oxford University Press, 2002. http://dx.doi.org/10.1093/oso/9780195130720.003.0024.

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Understanding the climate of Earth and the way climate varies in time requires a quantitative understanding of the way water cycles back and forth between the atmosphere and at the Earth's surface. The exchanges of water between the surface and atmosphere establish the hydrological cycle, and it is the influence of this cycle on the energy budget of Earth that is central not only to understanding present climate but also to the prediction of climate change. Processes relating to the smallest of the reservoirs of water—namely, the atmospheric branch of the hydrological cycle—play an especially critical role in climate change. Water in vapor phase is the critical greenhouse gas (e.g., Chahine 1992) providing much studied feedbacks on climate forcing (Lindzen 1990; Rind et al. 1991; Stephens and Greenwald 1991; Inamdar and Ramanathan 1998; Hall and Manabe 1999). Water in the form of condensed, precipitation-sized particles is an important source of energy fueling circulation systems and is the fundamental supply of fresh water to life on Earth. Liquid water cloud droplets significantly modulate the radiative budget of the planet (e.g., Wielicki et al. 1995). Water that exists as ice particles suspended in the atmosphere is perhaps the smallest of the water reservoirs of the atmosphere, yet these ice crystals when distributed as part of large-scale cirrus clouds exert a disproportionate influence on the energy and water budgets of the planet. This chapter briefly speculates on the important ways cirrus clouds affect the Earth's climate. The topics discussed are central to what is referred to as the cloud-climate problem, which might be schematically represented in terms of the coupled processes represented in figure 20.1. The two most critical scientific questions associated with the cloud-climate problem are also stated in figure 20.1. Answers to these questions require a clearer understanding of how the large-scale circulation of the atmosphere governs cloud formation and evolution, how these clouds heat and moisten the atmosphere, and how this heating and moistening effect in turn feeds back to influence the dynamical and thermodynamical properties of the atmosphere.

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Тези доповідей конференцій з теми "FEED WATER HEATING"

Pattanayak, Saroja Ranjan, Paladugu Venkaiah, Bikash Kumar Sarkar, Bikash Pattanayak, and Harish Chandra Das. "Modelling and control of parabolic trough field system for feed water heating application." In Proceedings of the 26thNational and 4th International ISHMT-ASTFE Heat and Mass Transfer Conference December 17-20, 2021, IIT Madras, Chennai-600036, Tamil Nadu, India. Connecticut: Begellhouse, 2022. http://dx.doi.org/10.1615/ihmtc-2021.420.

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Shukla, P., M. Izadi, P. Marzocca, and D. K. Aidun. "A Heat Recovery Study: Application of Intercooler as a Feed-Water Heater of Heat Recovery Steam Generator." In ASME 2010 International Mechanical Engineering Congress and Exposition. ASMEDC, 2010. http://dx.doi.org/10.1115/imece2010-38917.

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This paper evaluates the possibility of combining an intercooled gas turbine power cycle with a steam turbine cycle and the application of the intercooler as a feed-water heater for the heat recovery steam generator. In advance gas turbines the intercooler is used to improve the overall efficiency of the simple cycle but a noticeable amount of heat is wasted to the atmosphere. However, this energy can be recovered by using the proposed method in the current study. Accordingly, a thermodynamic study is done to investigate the improvement in efficiency achieved by feed-water heating. First the effect of intercooler parameters on the outlet condition of the water is studied. The bottoming cycle is then studied in details for the effect of feed-water temperature. An estimate of the energy saving by using the proposed method will be reported. The results show that less heat input will be required for the same amount of steam generation. The current study provides a theoretical support for waste heat recovery from the intercooler.

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Rahmadhanty, Shaneza Fatma, Subrahmanya T. M., Wei-Song Hung, and Po Ting Lin. "Optimization of Self-Heated Vacuum Membrane Distillation Using Response Surface Methodology." In ASME 2022 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/detc2022-89491.

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Abstract Currently, technology is increasingly advanced and has penetrated into several fields such as Membrane Distillation (MD) in water treatment, especially to purify saline water, in the face of the increasing scarcity of clean water needed for consumption, both in the domestic, agriculture, and industrial sectors. One of the configurations in MD systems, self-heated Vacuum Membrane Distillation (VMD) system, which employs a Graphene-PVDF membrane heated by power supply, in this case using DC power with low voltage, to eliminate feed pre-feed heating and temperature polarization, is interesting to learn. In addition, to enhance the performances, such as optimizing permeate flux (JW), Temperature Polarization Factor (TPF), Specific Heating Energy (QSH), and Gain Output Ratio (GOR), several different designs are made and compared. In this study, four parameters are selected: DC power supply’s voltage, feed flow rate, the length, and the width of the cell-body’s slot. Ansys FLUENT software is utilized to simulate the system, followed by Minitab software to analyze the results using Response Surface Method (RSM) which aims to achieve the optimal design parameters. The simulation data was validated by experimental data and determination of the optimum conditions of the self-heated VMD system led to the best performances such as maximizing JW, TPF, and GOR, as well as minimizing QSH.

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Veiga, Jose´ C., Carlos F. Cipolatti, and Ana M. Furtado. "Superheated Steam Test Rig for Compressed Non-Asbestos Gaskets Evaluation." In ASME 2009 Pressure Vessels and Piping Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/pvp2009-77466.

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This paper presents a Superheated Steam Test Rig and a Test Procedure for Compressed Non-Asbestos (CNA) Gaskets qualification. The Test Rig is a versatile assembly that can use different flange sizes and heating systems. It simulates a Superheated Steam Boiler with a water feed pump, pressurized water tank, pressure relief valve, condenser and the flange pair acting as the Steam generation unit. Heating can be provided by an oven or heating element bands. The Test Protocol enables the evaluation of the gasket performance in Superheated Steam in severe operational conditions like high pressure and temperature with thermal cycling. Different types of non-asbestos compressed gaskets were tested monitoring the leak rate and bolt load at each thermal cycle.

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Su, Chih-Yuan, and Gou-Jen Wang. "Development of a Three-Dimensional Printer for Water-Soluble Biomaterial Printing." In ASME 2018 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/detc2018-85057.

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In this study, a three-dimensional bioscaffold printer was developed to fabricate biocompatible scaffolds from water-soluble materials for application in cell studies. A gelatin/sodium alginate solution was used to produce the scaffolds via a fused deposition modelling (FDM) printing method using the modified 3D printer. Modifications and improvements to the material feeding system, printing head, and printing platform were made, with additional optimization of the printing parameters, such as the feed rate, printing rate, and printing head size to investigate the precision and accuracy of two-dimensional and 3D bioscaffold printing. In addition to modifications of the feeding system from the original solid to the new liquid state material, a heating probe and coil were added to maintain the liquid phase. The printing nozzle was also altered to allow for the feed material and a cross-linking agent to mix prior to printing; enabling cross-linked scaffolds to be produced. Furthermore, the printing surface was integrated with a filter to allow for excess fluid to drain from the scaffold after printing and cross-linking. The results of this study revealed that the optimal printing parameters for producing a 2D 15.3 mm × 15.3 mm square was with a printing head-platform distance of 4 mm, material feed rate of 5 mL/min, printing rate of 35 mm/s and a printing head diameter of 0.4 mm. In addition, it was found that the printing speed and the printed image size and resolution are correlated, as such, the smallest dimensions able to be printed is 10.3 mm × 10.3 mm, with a line width of 1 mm. In regards to 3D scaffolds, the printed scaffolds had dimensions of 20 mm × 20.15 mm with a height of 7.5 mm; which were found to support the growth of mouse fibroblast cells.

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Ran, Jing-yu, Wei-di Wu, Zhi-hua Liu, and Li Zhang. "Heating Performance and Application Analysis of the Low-Pressure Injection Heater With Tapered Mixing Space." In ASME 2011 Power Conference collocated with JSME ICOPE 2011. ASMEDC, 2011. http://dx.doi.org/10.1115/power2011-55049.

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A new type of low-pressure injection heater was presented. The tapered structure of the heater’s mixture space was designed. Heating performance of the low-pressure heater was studied through the experimental method. Then, the influence of entrance parameters on the outlet temperature, the outlet pressure and the ejecting coefficient were analyzed. The results show that the increase of water mass flow rate can lead to the ejecting coefficient declines under the condition of steam pressure (0.2MPa). Meanwhile, the increases temperature at the outlet can be over 60°C at the inlet water temperature Tw = 20°C. The injection heater has a good adaptability for changing the entrance parameters, which can eliminate the danger that high pressure water enters system. At the same time, based on the theory of Equivalent Enthalpy Drop Method (EEDM) and thermodynamic system state equations, the results of calculation are also shown that the optimization transformation can improve a certain economic profit. The injection heater could be used in the low-pressure feed water system of 200MW steam power plant. The calculated results also indicate that it can replace the sub-last stage surface heat exchanger and raise thermal efficiency of the whole system by 0.07%. Moreover, if all low-pressure surface heat exchangers are replaced by the injection heater, the thermal economy of the whole system can be enhanced by 0.224%.

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Hong, Xu. "Influence of Feedwater TOC on Steam Cation Conductivity." In ASME 2017 Power Conference Joint With ICOPE-17 collocated with the ASME 2017 11th International Conference on Energy Sustainability, the ASME 2017 15th International Conference on Fuel Cell Science, Engineering and Technology, and the ASME 2017 Nuclear Forum. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/power-icope2017-3023.

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The cation conductivity in water-steam cycle has been significantly increased as external heating units presented on trends in large capacity and high parameters. Real test has been carried out to demonstrate the TOC concentration in feedwater has been increased as the external heating increases. The presence of organic acid would significantly reduce the pH of the condensate and result in general corrosion, pitting and environment assisted cracking. For the cogeneration thermal power stations in which make-up water were produced with traditional ion exchange system and Integrated Membrane Technology separately, the main factors affecting cation conductivity of steam are residues of the organics in raw water and dynamic variation about bacterial reproduction in reducing environment, respectively. If gel type anion resin had been replaced with macroporous strong base anion resin, the remaining TOC in traditional ion exchange system could be significantly reduced. And if non-oxidative bactericide had been dosed before or after Ultrahigh Purity Filter, bacteria could be effectively killed. For heat-supply units, the actual rates of makeup water, denote with “N%”, are always more than the design value. So it is very important in this scenario to revise the ceiling values of TOC for makeup water, which should be divided by N, to allow that ceiling value to match the actual rate of makeup water. For drum boilers and once-through boilers which superheated steam pressure are greater than 18.3 MPa, in order to guarantee the cation conductivity (25 °C) values of feed water less than the standard of 0.10 μ S/cm, TOC values in feed water should be under 50μ g/L.

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Basilio, Leandro P., Fabiano G. Drumond, Pedro L. F. Mendes, Alessandro França, Marcílio P. Prado, and Jonatas Ribeiro. "Flow Assurance With Water Heated Pipe-in-Pipe in Fields With High Gas Oil Ratio and High Wax Appearance Temperature." In ASME 2013 32nd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/omae2013-10143.

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The development of pre-salt fields in the Santos Basin has presented a plenty of technological challenges, which include the production of fluids with high values of GOR (Gas Oil Ratio) and high values of WAT (Wax Appearance Temperature). To avoid the wax deposition, it is absolutely imperative handling the temperature by insulation and/or heating. If in one hand the production system thermal insulation minimizes the heat losses to the environment, on the other hand the cooling due the thermodynamic effect of gas expansion is inevitable, mainly in fields with high GOR values. To mitigate the problem of temperature drop, mainly in the risers where the expansion effects are pronounced, various heating systems for subsea pipelines have been studied by PETROBRAS. In parallel to these studies, it was noted that the design philosophy of the offshore production units for the pre-salt fields have indicated the use of turbo–generators to supply electrical power to the production unit, leading to the opportunity of using the generated super heated gases, originally discharged into the atmosphere, in order to feed the riser heating systems based on heated fluids circulation. Studies of heat exchange performed indicated a great potential for the risers heating by the flow of heated water through the annular of a Pipe-in-Pipe riser, by using a WHRU (Waste Heat Recovery Unit) to recover the power discharged into the atmosphere from the turbo–generators. It was identified the possibility of heating Pipe-in-Pipe risers by circulating heated fresh water in a closed loop with water return to the production unit, or by coupling the riser heating system with the water injection system, using all the facilities for treatment and pumping of water injection. This paper aims to describe the methodology considered in the development of a conceptual design of a heating system for a Pipe-in-Pipe riser, by the flow of heated water in the annular, in a Free Standing Hybrid Riser configuration. The paper will also present the characteristics associated with the two possibilities of heated water circuit, as well as advantages and disadvantages of each system, and the aspects related to subsea production layout.

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Shiferaw, Dereje, and Robert Broad. "Diffusion Bonded Heat Exchangers (PCHEs) in Fuel Gas Heating to Improve Efficiency of CCGTs." In ASME 2014 Power Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/power2014-32008.

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The purpose of this paper is to show how compact heat exchanger technology can offer energy savings and hence cycle efficiency improvements on new and existing gas turbine installations by being utilised for fuel gas heating. After a brief introduction to high temperature compact heat exchanger technology and comparison to traditional equipment, thermodynamic cycle analysis for a combined cycle gas turbine plant (CCGT) is used show the advantages of compact technology over conventional technology, analysing the fuel gas heating, to illustrate the overall savings. A case study is used to demonstrate an increase in net LHV electric efficiency in the range of 0.5 to 1.17 % achievable using high effectiveness compact diffusion bonded heat exchangers in fuel gas heating. Intermediate pressure and high pressure feed water heating is considered for increasing the fuel gas inlet temperature to the combustor. The model is built in Excel and is extended to a capital expenditure overview based on new or a retrofitting in existing plants.

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Hawlader, M. N. A., and Zakaria Mohd Amin. "Conversion of Seawater to Fresh Water: An Experiment With a Solar Assisted Heat Pump." In ASME 2008 2nd International Conference on Energy Sustainability collocated with the Heat Transfer, Fluids Engineering, and 3rd Energy Nanotechnology Conferences. ASMEDC, 2008. http://dx.doi.org/10.1115/es2008-54162.

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Seawater desalination is one of the most suitable areas for the utilization of solar thermal energy due to the coincidence, in many places of the world, of water scarcity, seawater availability and good levels of solar irradiation. The solar assisted heat pump provides a new horizon in the seawater desalination. Experiments were conducted on solar assisted heat pump desalination system under meteorological conditions of Singapore. This system uses two types of flat-plate solar collectors. One is called evaporator-collector which is entirely unglazed. The other type is single-glazed collector used for feed water heating. A single stage MED (multi-effect distillation) evaporator is used in this system and the refrigerant R134a is used in the heat pump. The system has a Performance Ratio (PR) of around 1.3 and water production capability of 0.6 to 0.9 kg/hr. The Coefficient of Performance (COP) of the heat pump reaches a maximum value of about 9 for the meteorological conditions of Singapore.

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Звіти організацій з теми "FEED WATER HEATING"

Iselin, Columbus O'Donnell. Preliminary report on the prediction of "Afternoon Effect". Woods Hole Oceanographic Institution, December 2022. http://dx.doi.org/10.1575/1912/29562.

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With moderate or light winds and a clear sky the diurnal heating which occurs near the sea surface can cause a serious reduction in the range of submarine detection, especially on shallow targets. This has usually been called the “afternoon effect", although as will be noticed below the ranges often remain short long after sun down. The heating of surface waters which causes such sharp downward refraction can of course be noted on a bathythermograph record, provided pen vibration does not confuse the upper part of the trace. Unfortunately it is the upper 20 or 30 feet of a bathythermograph curve which in the case of ships moving faster than 12 knots is often somewhat difficult to read with sufficient certainty. Moreover, in planning a days operations it is clearly desirable to know in advance how much reduction in range may be expected from diurnal warming.

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