Academic literature on the topic 'Chiller analysis'

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Journal articles on the topic "Chiller analysis"

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Sun, Xiao Yu, and Rui Li. "Numerical Simulation and Analysis of Energy Saving Operation of Chillers in an Air Conditioning System." Applied Mechanics and Materials 744-746 (March 2015): 2293–96. http://dx.doi.org/10.4028/www.scientific.net/amm.744-746.2293.

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The chiller’s operating energy consumption accounts for large proportion in energy consumption of air conditioning system. There are kinds of strategies can be used in the multiple chillers system. When running according to the load control of the chiller, different starting point and operating condition will affect the total energy consumption. Different operating conditions are put forward for a building chilled water system. According to simulate and analysis different operating condition, the optimum operation condition is concluded.
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Wang, Deming, Ying Peng, and Zexi Wang. "Adding a Bypass to Ensure the Chemical Plant Production." International Journal of Chemistry 8, no. 3 (July 5, 2016): 50. http://dx.doi.org/10.5539/ijc.v8n3p50.

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<p>The chilling output of the chiller fluctuated according to the chilling load. When it dropped down below a certain value, the temperature of the supply chilled water flowing out of the chiller would drop down too much. And this would result the chiller being shut down abnormally, because of its low temperature protection. Any this shutdown of the chiller endangered the production continuity and security, and caused a certain economic losses. A bypass, which was from the outlet of the chiller’s condenser to the chilled water filter inlet, was added to the chilling system. Through this bypass, some cooling water was introduced from the cooling water circulation into the chilled water circulation. Then the temperature of the supply chilled water flowing out of the chiller was promoted. With experiments, and by the aid of thermodynamics analysis, the amount of introduced cooling water, which could be introduced to promote the supply chilled water temperature for maintaining the chiller running normally, was researched. Ultimately, a certain amount of introduced cooling water, at which the chiller would no longer stop abnormally at any chilling load, was determined. And the energy lose caused by the introduced cooling water was less than 5 percent the rated output of the chiller. Compared with the chiller rated output, this energy lose was so small that it could be neglected.</p>
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Ng, K. C., and X. L. Wang. "Thermodynamic methods for performance analysis of chillers." Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering 219, no. 2 (May 1, 2005): 109–16. http://dx.doi.org/10.1243/095440805x28249.

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This paper presents a simple thermodynamic model that captures accurately the behaviour of all types of real chillers or cooling devices. In addition to its predictive capability, it also provides a diagnostic means for the in situ monitoring of chiller performance. To enhance the understanding of the chiller cycles, a novel way of formulating the classic T-s diagrams is provided for all chiller types, ranging from the mechanical, heat-driven and solid-state chillers.
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George, Hezekiah, Jingdou Wang, and Becky Bryant. "Chiller compressor sound emission analysis." Journal of the Acoustical Society of America 151, no. 4 (April 2022): A84. http://dx.doi.org/10.1121/10.0010737.

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Building occupants rely on heating, ventilation, and air conditioning (HVAC) units for comfort. Chillers are HVAC units that serve the purpose of cooling a building. Because chillers are often placed on top of or near the building, the noise from the chiller can adversely affect the occupants. A crucial component of all chillers, the compressor, is responsible for the majority of the noise produced by the chiller. In addition to designing for cooling efficiency, engineers must also consider how quiet and acoustically efficient a chiller is. In this project, we aim to develop an enclosure to house the compressor, therefore, reducing the magnitude of noise that is emitted. We begin by studying an empty cavity model in an acoustical software and observing its modes, resonant frequencies, and corresponding pressure distributions. Next, we placed a sound source within the cavity and then analyzed the acoustics frequency response of the cavity without and with a sound-absorbent material. We then proceeded to analyze a FEM model of the compressor and its dynamic frequency response due to the bearing force. After further analysis of the compressor sound emission, simulations will be made for the compressor with the designed enclosure and sound-absorbent material.
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Bai, Yan Bin, Xiang Huang, Hai Hong Huo, and Li Wen. "Evaporative Cooling Chillers Economic Configuration Scheme Analysis." Advanced Materials Research 516-517 (May 2012): 1152–55. http://dx.doi.org/10.4028/www.scientific.net/amr.516-517.1152.

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Depending on the project which will use the cooling system Combined with evaporative cooling chillers and mechanical chiller in yulin, the evaporative cooling chillers and mechanical chiller of water system were respectively analyzed in three different forms in this article. Starting from the different process of three different forms in Psychrometrics and the different running time, three different form of water system had been preliminary budgeted. It can be known that the economy of configuration scheme of evaporative cooling technology and mechanical refrigeration technology.
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Phu, Nguyen Minh. "Overall Optimization and Exergy Analysis of an Air Conditioning System Using a Series-Series Counterflow Arrangement of Water Chillers." International Journal of Air-Conditioning and Refrigeration 27, no. 04 (November 25, 2019): 1950034. http://dx.doi.org/10.1142/s2010132519500342.

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When water chillers are arranged in series-series counterflow (SSCF), the compressor lift of each chiller is decreased in comparison with that of water chillers in parallel. This means that the compressor power of SSCF chillers is lower than that of parallel chillers. In this paper, models of the main components in an air conditioning system were developed and verified to predict the behaviors of the whole system with respect to SSCF chillers. The results showed that performance was maximized with three SSCF chillers when the system was operated with normal set points. The performance was further improved to 26% and decreased with the number of SSCF chillers when the system was operated with optimal set points. The SSCF chiller system also demonstrated higher exergy efficiency regardless of the number of SSCF chillers. The irreversibility of components in SSCF chillers was rather low. However, the irreversibility of the cooling tower and cooling coil was slightly higher and lower, respectively, than those in the parallel chiller system.
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Hu, Jianke, Kai Teng, Yida Qiu, Yuzhu Chen, Jun Wang, and Peter Lund. "Thermodynamic and Economic Performance Assessment of Double-Effect Absorption Chiller Systems with Series and Parallel Connections." Energies 15, no. 23 (December 1, 2022): 9105. http://dx.doi.org/10.3390/en15239105.

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Absorption cooling technologies converting excess heat and renewable heat resources to cooling energy have shown progress in recent years. In this study, two 400 kW LiBr solution absorption chiller types with series and parallel connected are analyzed over a range of parameter values to better understand their applicability for different uses. Thermodynamic models for the components were constructed and validated. The performance of the chillers related to heat transfer, energy, exergy, and economy performance was comprehensively analyzed. The operating performance was investigated by considering the external variables, including inlet cooling water, chilled water, and inlet steam temperatures and the solution allocation ratio. The results indicate that the parallel connected chiller reaches higher energy and exergy performance than the series-connected chiller, but the heat transfer and economic performance was lower. The coefficient of performance and the exergy efficiency of the parallel chiller were for the reference system 1.30 and 24.42%, respectively. Except for the exergy efficiency, the inlet steam and inlet chilled water temperature had positive impact on the heat transfer, energy, and economic performance, while the inlet cooling water temperature trends the opposite. The sensitivity analysis on solution allocation ratio showed that a higher ratio decreases the heat transfer and economic performance, but considering the energy and exergy performance, a suitable allocation ratio would be 0.54.
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Maya Firanti Putri, Aris Sunawar, and Massus Subekti. "ANALISIS KINERJA CHILLER DI GEDUNG SENAYAN CITY." Journal of Electrical Vocational Education and Technology 1, no. 1 (March 20, 2020): 44–47. http://dx.doi.org/10.21009/jevet.0011.09.

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Abstract. Research conducted in the building Senayan City in June 2016 using qualitative research methods. Standards are used as a benchmark the performance of each chiller uses ISO 6390 in 2011 on Energy Conservation Air system administration Building. These aspects are analyzed to determine the performance of the chiller is the temperature of chilled water, flow chilled water and compressor power. As for the influence of the three aspects is the temperature of the outside environment. By calculating the cooling capacity, the highest Coefficient of Permonace (COP) value can be determined each chiller.Chiller performance analysis results obtained COP value of the highest attainable number 1 at 7.31 chiller, chiller number 2 at 8.03 and chiller number 3 6:27. These values ​​meet the mi nimum value of COP according to ISO standards. Lowest chiller COP value number 1 by 5.08, number 2 for 5.12 chiller and chiller number 3 at 4.22. Third party chiller COP minimum value does not meet the minimum standards of the COP. Chiller number 3 has the lowest minimum number COP and far below the minimum stadar.Judging from the value of cooling capacity and COP, chiller performance is not good enough is the number 3. And the chiller that has good enough performance is number 1 and 2 Abstrak Penelitian ini bertujuan untuk menghasilkan data analisis kinerja chiller di gedung Senayan City. Penelitian yang dilakukan di gedung Senayan City pada bulan Juni 2016 ini menggunakan metode penelitian kualitatif. Standar yang digunakan sebagai patokan kinerja masing-masing chiller menggunakan SNI 6390 tahun 2011 tentang Konservasi Energi Sistem Tata Udara Bangunan Gedung. Aspek-aspek yang dianalisis untuk mengetahui kinerja chiller adalah temperatur chilled water, flow chilled water dan power kompresor. Adapun yang mempengaruhi ketiga aspek tersebut adalah temperatur lingkungan luar. Dengan menghitung kapasitas pendinginan, dapat ditentukan nilai Coefficient of Permonace (COP) tertinggi masing-masing chiller. Hasil analisis kinerja chiller didapat Nilai COP tertinggi yang dapat dicapai chiller nomor 1 sebesar 7,31, chiller nomor 2 sebesar 8,03 dan chiller nomor 3 6.27. Ketiga nilai tersebut memenuhi nilai minimum standar COP menurut SNI. Nilai COP terendah chiller nomor 1 sebesar 5,08, chiller nomor 2 sebesar 5,12 dan chiller nomor 3 sebesar 4,22. Ketiga nilai minimum COP ketiga chiller ini tidak memenuhi standar minimum COP. Chiller nomor 3 mempunyai angka minimum COP paling rendah dan jauh dibawah stadar minimum. Dilihat dari kapasitas pendinginan dan nilai COP, chiller yang kinerja kurang baik adalah chiller nomor 3. Dan chiller yang performanya cukup baik adalah chiller nomor 1 dan 2.
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Dai, Ming He, Zhi Ping Zhou, and Xing Xue. "Test and Energy Consumption Analysis of Air-Conditioning Systems in Terminal Building of Guilin Liangjiang International Airport." Applied Mechanics and Materials 170-173 (May 2012): 2652–56. http://dx.doi.org/10.4028/www.scientific.net/amm.170-173.2652.

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In this paper, the operating conditions of air-conditioning systems in Terminal building of Guilin LiangJiang International Airport were tested and analysed. This paper mainly analyzes the influence of chilled water temperature on water chiller performance and derives the relationship of COP of water chiller and chilled water temperature difference between inlet and outlet , and provides reference for operation mode’s optimization of the air-conditioning system and energy consumption reduction of the whole building.
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Torres, Yamile Díaz, Paride Gullo, Hernán Hernández Herrera, Migdalia Torres del Toro, Mario A. Álvarez Guerra, Jorge Iván Silva Ortega, and Arne Speerforck. "Statistical Analysis of Design Variables in a Chiller Plant and Their Influence on Energy Consumption and Life Cycle Cost." Sustainability 14, no. 16 (August 16, 2022): 10175. http://dx.doi.org/10.3390/su141610175.

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An appropriate design of a chiller plant is crucial to guarantee highly performing solutions. However, several design variables, such as type of systems, total cooling capacity, and hydraulic arrangement, need to be considered. On the one hand, at present, different technical criteria for selecting the most suitable design variables are available. Studies that corroborate the influence of the design variables over the operational variables are missing. In order to fill this knowledge gap, this work proposes a statistical analysis of design variables in chiller plants operating in medium- and large-scale applications and evaluates their influence on energy consumption and life cycle cost (LCC) under the same thermal demand conditions. A case study involving 138 chiller plant combinations featuring different arrangements and a Cuban hotel was selected. The results suggested that the total chiller design and cooling capacity distribution among chillers have a significant influence on the energy consumption of the chiller plant with a Spearman’s Rho and Kendall Tau (τ) correlation index value of −0.625 and 0.559, respectively. However, with LCC, only the cooling capacity distribution among the chillers had a certain influence with a Kendall Tau correlation index value of 0.289. As for the considered total cooling capacity, the applied statistical test showed that this design variable does not have any influence on performing the chiller plant.
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Dissertations / Theses on the topic "Chiller analysis"

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Lilly, Dana Elizabeth. "Analysis and performance of gas-electric hybrid chiller systems." Thesis, Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/15996.

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Hu, Yang. "Advanced Exergy Analysis for a Solar Double Stage Absorption Chiller." Research Showcase @ CMU, 2012. http://repository.cmu.edu/dissertations/126.

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Solar driven absorption chiller technology as an alternative mechanism for cooling has been the focus of tremendous recent interest due to its potential advantages for energy conservation and the environment benefits. However, the comparatively lower coefficient of performance (COP) of these systems compared to the COP of the electric chillers has prevented more widespread applications. In this dissertation, a novel comparison between an electric and an absorption chiller will be presented (Chapter 3), including a method for calculating the true solar energy requirement for fossil fuel (coal) formation. The same comparison is then extended to the exergy domain. Compared to an electric chiller, in order to provide the same amount of cooling, a solar driven absorption chiller actually consumes a much smaller amount of both solar energy and exergy. Beyond demonstrating this lower level of actual energy/exergy consumption, it is still important to increase the efficiency of the solar chiller system. Therefore, a detailed exergy destruction analysis (Chapter 4 and 5) is performed in this dissertation, both for the solar collector, which includes pumping exergy loss, and for a two-stage lithium bromide (LiBr)-water absorption chiller. These analyses allow for a better understanding of the exergy destruction due to a component’s own inefficiency and/or due to the remaining components’ inefficiencies. Given the limits of current technology, the results show that the COP of a two-stage LiBr-water absorption chiller can be improved from 1.1 to 1.38, a 25% efficiency increase, by recovering the avoidable exergy destruction. Finally, based on the contributions described above and the conclusions that can be drawn from them, a range of potential future work is presented. Other comparative systems are discussed, and the challenges in properly assessing the performance of those systems are described.
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Richard, Scott J. "A Study on the Integration of a Novel Absorption Chiller into a Microscale Combined Cooling, Heating, and Power (Micro-CCHP) System." ScholarWorks@UNO, 2013. http://scholarworks.uno.edu/td/1765.

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This study explores the application of micro-CCHP systems that utilize a 30 kW gas microturbine and an absorption chiller. Engineering Equation Solver (EES) is used to model a novel single-effect and double-effect water-lithium bromide absorption chiller that integrates the heat recovery unit and cooling tower of a conventional CCHP system into the chiller’s design, reducing the cost and footprint of the system. The results of the EES model are used to perform heat and material balances for the micro-CCHP systems employing the novel integrated chillers, and energy budgets for these systems are developed. While the thermal performance of existing CCHP systems range from 50-70%, the resulting thermal performance of the new systems in this study can double those previously documented. The size of the new system can be significantly reduced to less than one third the size of the existing system.
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Klawunder, Shawn Eric. "Modeling and analysis of chilled water systems." Thesis, Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/16383.

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Liu, Hubert H. "Analytsis and performance optimization of commercial chiller/cooling tower systems." Thesis, Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/15895.

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Harrell, Justin M. "Improving efficiency in the SIUC campus chilled water system using exergy analysis /." Available to subscribers only, 2008. http://proquest.umi.com/pqdweb?did=1559849671&sid=17&Fmt=2&clientId=1509&RQT=309&VName=PQD.

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Thesis (M.S.)--Southern Illinois University Carbondale, 2008.
"Department of Mechanical Engineering and Energy Processes." Includes bibliographical references (pages 122-124). Also available online.
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Cui, Yi. "Factor Structure And Affective Composition Of The Chills: Replication And Extension." W&M ScholarWorks, 2020. https://scholarworks.wm.edu/etd/1616444531.

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“The chills” refers to a set of bodily sensations (goosebumps, tingling, coldness, and shivers) that sometimes accompany strong emotion (Maruskin, Thrash & Elliot, 2012). Past factor analyses of the chills identified a multi-factor, hierarchical structure, consisting of four lower-order factors (goosebumps, tingling, coldness, and shivers) and two higher-order factors (goosetingles and coldshivers). Research on the affective nomological nets of particular chills factors provided additional evidence of the discriminant validity of the two higher-order and the four-lower-order factors (Maruskin, Thrash & Elliot, 2012; Wadsworth, 2019). Despite evidence of discriminant validity, most researchers have continued to treat the chills as a unitary construct. The goal of the present study is to replicate and extend evidence that the chills consists of a set of distinguishable sensations with distinct affective correlates. Specifically, I aim to (a) replicate the factor structure of the chills and (b) further test whether the four lower-order sensations show distinct relations to core affect variables. Using the narrative recall method, the present study assessed chills sensations and core affect during recalled chills experience. Results of factor analyses replicated the factor structure of the chills established by Maruskin et al. (2012). Results of circumplex analyses provided additional evidence of the discriminant validity of higher-order and lower-order sensations. Goosetingles tended to accompany pleasant states, whereas coldshivers tended to accompany unpleasant states. Furthermore, relative to goosebumps, tingling accompanied states lower on activation and higher on pleasure. Relative to coldness, shivers accompanied states lower on displeasure and higher on activation. These findings are consistent with but refine the conclusions of Maruskin et al. (2012) and point to the value of incorporating the affect circumplex in understanding the chills.
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O'Neill, Kathleen. "Analysis of chilled water free cooling at the Perimeter Center Office Park (Atlanta, Georgia)." Thesis, Monterey, California. Naval Postgraduate School, 1991. http://hdl.handle.net/10945/25666.

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Kloberdanz, Christine Marie. "Geochemical analysis of the Monturaqui Impact Crater, Chile." Thesis, University of Iowa, 2010. https://ir.uiowa.edu/etd/835.

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Wheatley, A. "Modelling and performance analysis of a sub-dew point chilled beam in mixed mode buildings." Thesis, Loughborough University, 1999. https://dspace.lboro.ac.uk/2134/7176.

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Prompted by the energy crisis in the 1970's, European level fiscal and financial measures encourage energy efficient building design. "Mixed mode" strategies can be employed in buildings with moderate thermal loads, this approach can reduce building energy usage, and by inference, reduce C02 emissions. A mixed mode approach might employ chilled surfaces with displacement ventilation. This thesis investigates the performance and integration of one form of chilled surface design, (a sub-dew point chilled beam), within mixed mode strategies. Sub-dew point chilled beams have a surface temperature that is at or below the zone saturation temperature, this increases the cooling capacity of the chilled beam and consequently produces a latent heat transfer addition due to condensation mass transfer. This thesis describes the sensible and latent modelling approach which models the zone, sub-dew point chilled beam and mixed mode strategy thermal plant response to external disturbances. The thesis describes the use of an Enclosure Comfort Performance Indicator that acts as the objective function for the optimization of the mixed mode strategies with and without the integration of the sub-dew point chilled beam. The implementation of the Complex method for finding the operational optimums of the mixed mode strategy is described, and its effectiveness at finding the optimum solution evaluated. Normalised energy, cost and comfort performance indicators are used to assess the overall performance and integration of the sub-dew point chilled beam for different mixed mode strategies, for the ambient test conditions and for different thermal weights of building construction.
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Books on the topic "Chiller analysis"

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Mahindru, S. N. Indian chillies. New Delhi: A. P. H. Pub. Corp., 2009.

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Mahindru, S. N. Indian chillies. New Delhi: A. P. H. Pub. Corp., 2009.

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Mahindru, S. N. Indian chillies. New Delhi: A. P. H. Pub. Corp., 2009.

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Hingley, Martin. Distribution of chilled dairy products: An analysis of the market for chilled dairy products in the U.K., their handling and distribution. Watford: (Institute of Grocery Distribution), 1986.

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O'Neill, Kathleen. Analysis of chilled water free cooling at the Perimeter Center Office Park (Atlanta, Georgia). Springfield, Va: Available from the National Technical Information Service, 1991.

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Meller, Patricio. The Unidad Popular and the Pinochet dictatorship: A political economy analysis. New York, N.Y: St. Martin's Press, 2000.

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Stephany, Ursula. A brief introduction to the CHILDES project with special reference to Greek: CHAT transcription, linkage, grammatical coding and CLAN analysis. Köln: Inst. für Linguistik, Allg. Sprachwiss., 2010.

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Geldenhuys, Deon. Isolated states: A comparative analysis. Cambridge: Cambridge University Press, 1990.

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Jonathan, Todres, Wojcik Mark E, and Revaz Cris R, eds. The United Nations Convention on the Rights of the Child: An analysis of treaty provisions and implications of U.S. ratification. Ardsley, NY: Transnational Publishers, 2006.

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author, Bachman Robert E., and Silva John F. author, eds. Chile earthquake of 2010: Assessment of industrial facilities around Concepción. Reston, Virginia: American Society of Civil Engineers, 2016.

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Book chapters on the topic "Chiller analysis"

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Yoon, Jung-In, Chang-Hyo Son, Kwang-Hwan Choi, Young-Bok Kim, Suk-Ho Jung, and Changuk Moon. "Performance Analysis of Brine Chiller Refrigeration Cycles." In AETA 2016: Recent Advances in Electrical Engineering and Related Sciences, 184–94. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-50904-4_18.

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Cai, Zhenbing, and Yundan Liao. "Sensitivity and Uncertainty Analysis for Chiller Sequencing Control of the Variable Primary Flow System." In Environmental Science and Engineering, 943–51. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-13-9524-6_98.

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Jabari, Farkhondeh, and Behnam Mohammadi-Ivatloo. "Basic Open-Source Nonlinear Mixed Integer Programming Based Dynamic Economic Dispatch of Multi-chiller Plants." In Operation, Planning, and Analysis of Energy Storage Systems in Smart Energy Hubs, 121–27. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-75097-2_6.

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Tahani, M., P. Ahmadi, N. Enadi, K. Rahmani, T. Sokhansefat, K. Keramati, and S. Mirmahdian. "Exergy Analysis of a Hybrid System Including a Solar Panel, Fuel Cell, and Absorption Chiller." In Exergy for A Better Environment and Improved Sustainability 1, 1115–22. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-62572-0_71.

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Jabari, Farkhondeh, and Behnam Mohammadi-Ivatloo. "Optimal Short-Term Scheduling of Photovoltaic Powered Multi-chiller Plants in the Presence of Demand Response Programs." In Operation, Planning, and Analysis of Energy Storage Systems in Smart Energy Hubs, 103–19. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-75097-2_5.

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Biesinger, Andreas, Ruben Pesch, Mariela Cotrado, and Dirk Pietruschka. "Increased Efficiency Through Intelligent Networking of Producers and Consumers in Commercial Areas Using the Example of Robert Bosch GmbH." In iCity. Transformative Research for the Livable, Intelligent, and Sustainable City, 105–43. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-92096-8_9.

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AbstractEnergy-efficient heating and cooling systems as well as intelligent systems for energy distribution are urgently required in order to be able to meet the ambitious goals of the European Union to reduce greenhouse gas emissions. The present article is intended to show that intelligent system extensions for the area of heating, cooling and electricity production for the industrial sector can lead to significant increase in efficiency. For this purpose, a simulation study for the expansion of a combined heat and power (CHP) plant with 2 MW thermal output using a 1.4 MW absorption chiller has been carried out. This shows that a heat-controlled CHP unit can significantly increase its running time. A system model was created for the initial situation and validated with existing measurement data. In the second step, this model was expanded to include the ACM module. The simulation was able to prove that in the event of a system expansion, the run time of the CHP unit can be increased by 35%. In addition to then increase of energy efficiency in the supply system, the analysis also focuses on the efficiency of the energy distribution via thermal networks in an industrial environment. The presented paper therefore also highlights the optimization potentials in the operation of thermal supply networks for industrial applications. For this purpose, a mathematical model has been developed which in addition to the components of the thermal network itself also comprises the producers and consumers. The specific construction of thermal networks for the supply of industrial properties requires adapted solutions for the simulation of such systems. Therefore, amongst other things, in the paper, solutions are shown for the modelling of direct flow local heating networks as well as for the operation of a cascade-controlled pump group.
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Bieritz, Loreto. "Chile." In A Triple Bottom Line Analysis of Global Consumption, 397–404. New York: Jenny Stanford Publishing, 2022. http://dx.doi.org/10.1201/9781003256885-38.

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MacWhinney, Brian. "Enriching CHILDES for morphosyntactic analysis." In Trends in Language Acquisition Research, 165–97. Amsterdam: John Benjamins Publishing Company, 2008. http://dx.doi.org/10.1075/tilar.6.09mac.

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Hahn, Federico, and Rafael Mota. "Nobel Chile Jalapeno sorting using structured laser and neural network classifiers." In Image Analysis and Processing, 517–23. Berlin, Heidelberg: Springer Berlin Heidelberg, 1997. http://dx.doi.org/10.1007/3-540-63508-4_163.

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Barozet, Emmanuelle, Marcelo Boado, and Ildefonso Marqués-Perales. "The Measurement of Social Stratification: Comparative Perspectives Between Europe and Latin America." In Towards a Comparative Analysis of Social Inequalities between Europe and Latin America, 171–202. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-48442-2_6.

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AbstractThis chapter analyses compared social stratification in three Latin American countries (Argentina, Chile and Uruguay) and four European countries (Finland, France, Spain, Great Britain). We focus on both external and internal borders of social classes, as well as on the challenges posed by their analysis for sociology. We compare social classes using EGP6 in relation to a variety of social indicators, to examine how social classes vary among countries. We include debates on production models and welfare state policies to understand the specific configurations and compare the conditions of some of the INCASI countries regarding social stratification. Lastly, we apply a latent class analysis to validate the number of social classes and to recognise class boundaries.
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Conference papers on the topic "Chiller analysis"

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Heydari, Ali, and Saeed Kargar. "Theoretical Modeling and Optimized Design of a Packaged Liquid Chiller." In ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference collocated with the ASME 2007 InterPACK Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/ht2007-32839.

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This work attempts to develop a physical simulation model for the purpose of studying the effect of various design parameters on the performance of a packaged liquid chiller. A computer model which simulates the steady-state cyclic performance of a vapor compression chiller is developed for the purpose of performing detailed physical design analysis of actual industrial chillers. The model can be used for optimizing design and for detailed energy efficiency analysis of packaged liquid chillers. The simulation model takes into account presence of all chiller components such as compressor, shell-and-tube condenser and evaporator heat exchangers, thermostatic expansion valve and connection pipes and tubing’s by thermal-hydraulic modeling of heat transfer, fluids flow and thermodynamics processes in the chiller’s components. To verify the validity of the developed model, a 7.5 USRT packaged-liquid chiller is used and a laboratory test stand for brining the chiller to its standard steady-state performance condition is build. Experimental results obtained from testing the chiller in different load and temperature conditions are shown to be in good agreement with those obtained from simulating the performance of the chiller using the developed computer model. To optimize the chiller design, an entropy-minimization-optimization analysis is performed based on the analytical performance model of the chiller. The variation of design parameters in construction of shell-and-tube condenser and evaporator heat exchangers are studied using the developed performance and optimization analysis and simulation model and a best-match condition between the physical design and construction of chiller heat exchangers and its compressor is found to exist. It is expected that manufacturers of chillers and research organizations interested in developing energy-efficient design and analysis of chillers can take advantage of the presented study and its results.
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Heydari, Ali, and Saeed Kargar. "Analysis and Optimized Design of a Packaged Liquid Chiller: Part I — Analytical Modelling." In ASME 2005 Summer Heat Transfer Conference collocated with the ASME 2005 Pacific Rim Technical Conference and Exhibition on Integration and Packaging of MEMS, NEMS, and Electronic Systems. ASMEDC, 2005. http://dx.doi.org/10.1115/ht2005-72685.

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The purpose of this work is to develop a physical simulation model for the purpose of studying the effect of various design parameters on the performance of a packaged liquid chiller. A computer model which simulates the steady-state cyclic performance of a vapor compression chiller is developed for the purpose of performing detailed physical design analysis of actual industrial chillers. The model can be used for optimizing design and for detailed energy efficiency analysis of packaged liquid chillers. The simulation model takes into account presence of all chiller components such as compressor, shell-and-tube condenser and evaporator heat exchangers, thermostatic expansion valve and connection pipes and tubing’s by thermo-hydraulic modeling of heat transfer, fluids flow and thermodynamics processes in each one of the mentioned components. To verify the validity of the developed model, a 7.5 USRT packaged-liquid chiller is used and a laboratory test stand for brining the chiller to its standard steady-state performance condition is build. Experimental results obtained from testing the chiller in various load and temperature conditions are shown to be in good agreement with those obtained from simulating the performance of the chiller using the computer prediction model. In part II of this work, an entropy-minimization-optimization analysis is performed based on the developed analytical performance model of the chiller. The variation of design parameters in construction of shell-and-tube condenser and evaporator heat exchangers are studied using the developed performance and optimization analysis and simulation model and a best-match condition between the physical design and construction of chiller heat exchangers and its compressor is found to exist. It is expected that manufacturers of chillers and research organizations interested in developing energy-efficient design and analysis of chillers can take advantage of the presented study and its results.
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3

Menzli, Slim, Otto VanGeet, and Moncef Krarti. "Controls of Multiple Chillers in Central Cooling Plants." In ASME 2005 International Solar Energy Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/isec2005-76076.

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This paper summarizes the results of an extensive parametric analysis to assess the potential of multi-chiller plants to save energy associated with electric cooling use. Specifically, the impacts on chiller performance are investigated for two office buildings geometries, three chiller types, and five geographical locations. It was determined that for most office buildings, increasing the number of chillers beyond three does not provide significant additional energy savings for all three types of chillers and for all locations. Moreover, the results of the analysis indicate that a chiller size ratio of 0.65 for the case of a two-chiller central cooling plants provides the optimal energy performance.
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Hu, Yang, Laura A. Schaefer, and Volker Hartkopf. "Life Cycle Energy and Exergy Analysis for Building Cooling Systems: A Comparison Between a Solar Driven Absorption Chiller and an Electric Driven Chiller." In ASME 2011 5th International Conference on Energy Sustainability. ASMEDC, 2011. http://dx.doi.org/10.1115/es2011-54737.

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Buildings in the United States utilize 39% of the primary energy, and more than 60% of that energy consumption is provided for heating and cooling in buildings. Most of the heating and cooling systems commercially available in the market today are driven by electricity and natural gas, which are high exergy resources, while the operating temperature in the building from a year-round perspective is closer to the reference environmental temperature. Thus, from a thermodynamic point of view, there exists a gap between the high exergy resources/supply and low exergy application/demand in buildings. This paper extends the traditional means of energy comparison between solar driven absorption chillers and electric driven chillers. A life cycle energy and exergy analysis is developed with the assumption that the fossil fuel for electricity generation is a different form of storing solar energy in the long run. Thus, both the systems are driven by solar energy, and the only difference is that the solar absorption chiller is an instantaneous solar energy utilization, while the electricity chiller utilizes the stored solar energy. A simple absorption chiller model is developed, and is calibrated using a paper published by the Center for Building Performance and Diagnostics in Carnegie Mellon University, using a 4-ton 2-stage absorption chiller provided by Broad Air Conditioning. The energy and exergetic efficiencies in each process are analyzed and provided in the two systems. This paper is useful in understanding the fundamental life cycle energy and exergy in chiller applications for building cooling.
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Koronaki, I. P., M. T. Nitsas, E. G. Papoutsis, and V. D. Papaefthimiou. "Performance Analysis of a Silica Gel-Water Adsorption Cooler: Impact of Nanofluids on Cooler Performance and Size." In ASME 2015 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/imece2015-53450.

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Thermally driven chillers also known as sorption heat pumps have drawn considerable attention in recent years. They can be divided into two main categories: absorption (liquid-vapor) and adsorption (solid-vapor) systems. Even though adsorption cycles have relatively lower coefficient of performance compared to absorption cycles, however they prevail in terms of heat source, electric consumption for moving parts, crystallization etc. In order to overcome the drawback of low COP and specific cooling capacity, nanofluids, i.e. mixtures of nanometer size particles well-dispersed in a base fluid, can be used as heat transfer fluids as recent experimental and theoretical research has proved that nanofluids can exhibit a significant increase on heat transfer. In this study a two bed, single-stage adsorption chiller which utilizes the silica gel-water pair as adsorbent-refrigerant is simulated. The cooling capacity and the COP of the chiller are calculated for various cycle times. The usage of nanofluids as heat transfer fluids in the chiller evaporator and condenser and their effect on chiller performance and size is investigated. It is proved that the presence of nanofluids at different volume concentrations will enhance the cooling capacity and the COP of the adsorption chiller and therefore will lead to smaller, in terms of size, heat exchangers.
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Qu, Ming, David H. Archer, and Hongxi Yin. "Experiment Based Performance Analysis of a Solar Absorption Cooling and Heating System in Carnegie Mellon University." 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/es2008-54200.

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The center for building performance and diagnostic (CBPD) at Carnegie Mellon University has successfully designed, installed and tested a solar cooling and heating system to assess the feasibility of solar cooling for small scale commercial buildings or residential buildings with aspects of technology and energy efficiency. This solar cooling and heating system is primarily comprised of parabolic trough solar collectors, PTSC’s and a 16 kW dual energy source double effect (2E) absorption chiller. The 2E absorption chiller driven by PTSCs was tested to produce chilled water or hot water throughout a number of clear days in summer and winter. The analyses of the experimental data defined the system performance: the efficiency of the solar collector, the capacity and COP of the chiller, and the heat transfer coefficient of the heat recovery exchanger, by using a statistical approach, based on the energy balance equation. In the solar cooling tests during July 2007 in Pittsburgh, PA, the average efficiency of PTSCs was 35% when they were operated at about 155°C for driving the 2E absorption chiller and the chiller was able to provide 8 to 14 kW cooling with COP in the range 1.0 to 1.2; the overall system efficiency is in the range 0.35 to 0.41. In the near future, this solar absorption cooling and heating test system and its operation will be integrated with the cooling, heating and ventilation units for long term utilization.
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Sundaralingam, Vikneshan, Steven Isaacs, Pramod Kumar, and Yogendra Joshi. "Modeling Thermal Mass of a Data Center Validated With Actual Data due to Chiller Failure." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-65573.

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The task of minimizing the downtime of a data center is becoming increasingly important due to the necessity of availability and maintaining the integrity of the data being handled by the data center. Consequently, a model used to predict the thermal response of a data center would be useful information in designing mechanisms to minimize the downtime during a failure or to serve as an alternative analysis method other than CFD. This paper will focus on a thermodynamic approach of predicting the thermal response of the data center space with the use of lumped system analysis. The model will be developed and validated using actual data from a chiller failure event in the CEETHERM Data Center Laboratory. Events in sequence are: (i) Chiller failure, (ii) Data center shutdown due to critical temperatures and (iii) Chiller restored. To illustrate, the data center section of interest consists of 10 racks of servers (maximum capacity of 24kW for each rack) with a total of 3360 nodes and is chilled using chilled water from the building chiller, through which the cooling resources are distributed using a rear door heat exchanger and a cooling room air conditioning unit (CRAC). The relevant and important data that was recorded in this failure are the: (1) Server inlet temperatures, (2) CPU temperatures, (3) CRAC supply and return air temperatures, (4) Chiller supply and return water temperature, (5) Chiller flow rate, (6) Data center space temperature and humidity, (7) Server power draw and (8) CRAC fan speeds.
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Bergquam, James B., and Joseph M. Brezner. "Solar Fired, Compressor Assisted Absorption Chillers." In ASME Solar 2002: International Solar Energy Conference. ASMEDC, 2002. http://dx.doi.org/10.1115/sed2002-1041.

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This paper presents the results of a thermodynamic and heat transfer analysis of solar fired, compressor assisted absorption chillers. The objectives are to determine and evaluate the feasibility of using vapor compressors to lower the operating temperature of the primary generator, simplify the maintenance and reduce the cost of solar/waste heat powered absorption HVAC systems. The nominal generator temperature in a single effect absorption chiller is 88°C and the coefficient of performance is approximately 0.8. A standard double effect chiller requires the high temperature generator to operate at about 150°C. The nominal COP of a double effect cycle is 1.2 to 1.4. Various modifications have been proposed to lower the operating temperature of the primary generator. One such modification is to add a vapor compressor to the basic cycle. Computer models that simulate the effect of vapor compressors at selected locations in single and double effect LiBr/H2O absorption chillers have been developed. Two locations were modeled for single effect chillers and three locations for double effect chillers. The best results were obtained for a double effect chiller with the compressor located between the high and low temperature generators.
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Gaudani, Ghanshyam, Alex Quintal, and Dragoljub Kosanovic. "Development of the Chilled Water System Analysis Tool for Assessing Energy Conservation Opportunities." In ASME 2013 7th International Conference on Energy Sustainability collocated with the ASME 2013 Heat Transfer Summer Conference and the ASME 2013 11th International Conference on Fuel Cell Science, Engineering and Technology. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/es2013-18016.

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Chilled water systems constitute a major portion of energy consumption in air conditioning systems of the large buildings and process cooling of the manufacturing plants. These systems do not operate optimally in most of the cases because of the operating parameters set and/or the components used. The Chilled water system analysis tool software (CWSAT) is developed as a primary screening tool for energy evaluation. This tool quantifies the energy usage of the various chilled water systems and typical measures that can be applied to these systems to conserve energy. The tool requires minimum number of inputs to analyze the component-wise energy consumption and incurred overall cost. Both air-cooled and water-cooled systems can be analyzed with this tool; however, this paper focuses on water-cooled systems. The tool uses weather data of the chilled water system location and loading schedules to calculate the chilled water system energy consumption. The Air-Conditioning and Refrigeration Institute (ARI) standard 550/590 typical loading schedule is also incorporated for the chiller(s) loading. The tool is capable of comparing economics by analyzing the energy consumption and relevant cost of the existing system and the new system with cost reduction opportunities considered like: (1) increase chilled water temperature set point, (2) lowering the condenser cooing water supply temperature set point, (3) replace chiller(s), (4) Apply variable speed control to chilled and/or condenser water pumps, (5) upgrade cooling tower fan speed control, (6) Use free cooling when possible for water-cooled systems. The savings can be calculated separately for each cost reduction opportunity or can be combined. The economics comparison can be a primary decision criterion for further detailed engineering and cost analysis related with system changes. The comparison between actual system energy consumption and CWSAT results are also shown.
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Meakins, Michael E., Nicole C. Okamoto, and Cullen E. Bash. "An Energy and Exergy Analysis of Economizer-Based Data Centers." 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/es2009-90067.

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Electrical consumption for data centers is on the rise as more and more of them are being built. Data center owners and operators are looking for methods to reduce energy consumption and electrical costs. One method of reducing facility costs for a chilled water plant is by adding an economizer. Most studies concerning economizer systems are largely conducted by looking at energy alone since the primary focus has reducing electrical costs. However, little research has been published that examines exergy destruction for these types of systems based on varying outdoor air conditions by locale. The purpose of this study has been to develop energy and exergy-based models of each of the most common economizer systems. In this paper, a normal chiller plant without an economizer and a chiller plant with an indirect wet-side economizer (the most common type of economizer system) are compared. A method for simulating a mechanical cooling system is provided and results show outdoor conditions influence facility energy consumption and exergy destruction.
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Reports on the topic "Chiller analysis"

1

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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HUITT-ZOLLARS INC FORT WORTH TX. Energy Engineering Analysis Program (EEAP) Boiler and Chiller Study at Fort Sam Houston, San Antonio, Texas. Fort Belvoir, VA: Defense Technical Information Center, September 1995. http://dx.doi.org/10.21236/ada330345.

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BENATECH INC ATLANTA GA. Energy Engineering Analysis Program, Energy Survey of Army Boiler and Chiller Plants at Fort Knox, Kentucky, Volume 1 - Executive Summary. Fort Belvoir, VA: Defense Technical Information Center, March 1993. http://dx.doi.org/10.21236/ada330901.

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BENATECH INC ATLANTA GA. Energy Engineering Analysis Program, Redstone Arsenal, Alabama, Energy Survey of Army Boiler and Chiller Plants. Volume 1 - Executive Summary, Part 1 & 2. Fort Belvoir, VA: Defense Technical Information Center, June 1987. http://dx.doi.org/10.21236/ada330804.

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HARRISON AND SPENCER INC MACON GA. Fort Gordon Energy Survey and Analysis of Boiler and Chiller Plants, Building 25910, Building 25330. Proposed Energy Conservation Opportunities for Savannah District Corps of Engineers. Executive Summary. Fort Belvoir, VA: Defense Technical Information Center, April 1995. http://dx.doi.org/10.21236/ada330477.

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Gonzalez Diez, Verónica M., Ernesto Cuestas, Andrea Rojas, Priscila Vera, Lucero Vargas, and Stefania De Santis. Independent Country Program Review Chile 2019-2022. Inter-American Development Bank, September 2022. http://dx.doi.org/10.18235/0004441.

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This Independent Country Program Review (ICPR) analyzes the Inter-American Development Bank (IDB) Group's strategy and program in Chile during the 2019-2022 period. ICPRs assess the relevance of the Bank's Country Strategy (CS) and provide additional information on the alignment and execution of the program. If the available information allows, ICPRs also report on the progress and contribution towards achievement of the objectives set by the IDB Group in the CS. With this product, the Office of Evaluation and Oversight (OVE) seeks to provide the Boards of Executive Directors of the IDB and IDB Invest with useful information for the analysis of Country Strategies submitted to them for consideration.
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Leung, V. T. Regulatory analysis for the resolution of Generic Issue 143: Availability of chilled water system and room cooling. Office of Scientific and Technical Information (OSTI), December 1993. http://dx.doi.org/10.2172/10115062.

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Daling, P. M., J. E. Marler, T. V. Vo, H. Phan, and J. R. Friley. Value impact analysis of Generic Issue 143, Availability of Heating, Ventilation, Air Conditioning (HVAC) and Chilled Water Systems. Office of Scientific and Technical Information (OSTI), November 1993. http://dx.doi.org/10.2172/10106874.

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Sittler, María José Abud, Bronwyn Hall, and Christian Helmers. An Empirical Analysis of Primary and Secondary Pharmaceutical Patents in Chile. Cambridge, MA: National Bureau of Economic Research, February 2015. http://dx.doi.org/10.3386/w20995.

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