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Relevant bibliographies by topics / Single pressure absorption refrigeration

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Academic literature on the topic 'Single pressure absorption refrigeration'

Author: Grafiati

Published: 4 June 2021

Last updated: 10 February 2022

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Journal articles on the topic "Single pressure absorption refrigeration"

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Verma, Abhishek, S. C. Kaushik, and S. K. Tyagi. "Thermodynamic Analysis of a Combined Single Effect Vapour Absorption System and tc-CO2 Compression Refrigeration System." HighTech and Innovation Journal 2, no. 2 (2021): 87–98. http://dx.doi.org/10.28991/hij-2021-02-02-02.

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Transcritical CO2 refrigeration system is coupled with the single effect vapour absorption with LiBr-water as a working pair having an objective to enhance the performance of low temperature transcritical refrigeration system while using natural working pair and to reduce the electricity consumption to produce low temperature refrigeration. The high grade waste heat rejected in the gas cooler of tc-CO2 compression refrigeration system (TCRS) is utilized to run the single effect vapour absorption system (SEVAR) to enhance the energy efficiency of the system. The gas cooler in the transcritical

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Bouaziz, Nahla, R. Ben Iffa, Lakdar Kairouani, Salahs Chikh, and Rachid Bennacer. "Performance of a Water Ammonia Absorption System Operating at Three Pressure Levels." Defect and Diffusion Forum 312-315 (April 2011): 947–52. http://dx.doi.org/10.4028/www.scientific.net/ddf.312-315.947.

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The present study deals with a compression-absorption machine. The proposed hybrid cooling system uses water-ammonia as a working fluid and operates at three pressure levels. The absorber is at an intermediate pressure (Pint) taken between the evaporator pressure (PEV) and the condenser pressure (PCD), unlike the single stage machine which works between two pressure levels. The proposed new system is studied and compared to the conventional machine. In order to evaluate the performance of the invoked machine, a procedure based on the MAPLE software is set up to compute accurately the thermodyn

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Chan, Keng Wai, and Malcolm McCulloch. "EXPERIMENTAL INVESTIGATION OF THE BUBBLE PUMP OF A SINGLE PRESSURE ABSORPTION REFRIGERATION SYSTEM UNDER THE EFFECT OF PRESSURE AND AMMONIA CONCENTRATION." Heat Transfer Research 47, no. 8 (2016): 767–80. http://dx.doi.org/10.1615/heattransres.2016010976.

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Nguyen, Phu Minh. "Energy and exergy estimation for a combined cycle of solid CO2 production and NH3-H2O single effect absorption chiller." Science and Technology Development Journal 19, no. 1 (2016): 61–69. http://dx.doi.org/10.32508/stdj.v19i1.611.

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In order to reduce the compression power, to use an integrated thermal-driven cycle, and to mitigate the CO2 content in the air, a new combined cycle of absorption chiller and vaporcompression refrigeration cycle to produce carbon dioxide dry ice was devised and analyzed. In this study, the energy and the exergy analyses of the combined cycle were presented. The combined cycle simulation was carried out by using EES (Engineering Equation Solver) program. The CO2 condensation pressure and the generator temperature were considered as key parameters. Results show that the total compression and pu

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Cabrera César, José, Jean Caratt Ortiz, Guillermo Valencia Ochoa, Rafael Ramírez Restrepo, and José R. Nuñez Alvarez. "A New Computational Tool for the Development of Advanced Exergy Analysis and LCA on Single Effect LiBr–H2O Solar Absorption Refrigeration System." Lubricants 9, no. 8 (2021): 76. http://dx.doi.org/10.3390/lubricants9080076.

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A single effect LiBr–H2O absorption refrigeration system coupled with a solar collector and a storage tank was studied to develop an assessment tool using the built-in App Designer in MATLAB®. The model is developed using balances of mass, energy, and species conservation in the components of the absorption cooling system, taking into account the effect of external streams through temperature and pressure drop. The whole system, coupled with the solar energy harvesting arrangement, is modeled for 24 h of operation with changes on an hourly basis based on ambient temperature, cooling system loa

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Alizadeh, Shahab. "Multi-pressure absorption cycles in solar refrigeration:." Solar Energy 69, no. 1 (2000): 37–44. http://dx.doi.org/10.1016/s0038-092x(00)00007-4.

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Beasley, Donald E., and J. Charles Hester. "Analysis of a pressure driven absorption refrigeration cycle." International Journal of Energy Research 12, no. 1 (1988): 175–84. http://dx.doi.org/10.1002/er.4440120118.

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Asha Iyer, P. S., S. Srinivasa Murthy, and M. V. Krishna Murthy. "Analysis of three-pressure vapour absorption refrigeration systems." Renewable Energy 1, no. 1 (1991): 55–58. http://dx.doi.org/10.1016/0960-1481(91)90103-v.

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Kumar, S., M. Prévost, and R. Bugarel. "Experimental studies of a three-pressure absorption refrigeration cycle." International Journal of Refrigeration 16, no. 1 (1993): 31–39. http://dx.doi.org/10.1016/0140-7007(93)90018-4.

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Liu, Yan Ling, Xue Zeng Shi, and Yuan Yu. "Design of a Solar Assisted Absorption Refrigeration System." Advanced Materials Research 953-954 (June 2014): 66–73. http://dx.doi.org/10.4028/www.scientific.net/amr.953-954.66.

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This paper presents the design of a solar/gas driving double effect LiBr-H2O absorption system. In order to use solar energy more efficiently, a new kind of solar/gas driving double effect LiBr-H2O absorption system is designed. In this system, the high-pressure generator is driven by conventional energy, natural gas, and solar energy together with water vapor generated in the high-pressure generator, which supplies energy to the low-pressure generator for a double effect absorption system. Simulation results illustrate that this kind of system is feasible and economical. Economic evaluation o

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Dissertations / Theses on the topic "Single pressure absorption refrigeration"

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Rattner, Alexander S. "Single-pressure absorption refrigeration systems for low-source-temperature applications." Diss., Georgia Institute of Technology, 2015. http://hdl.handle.net/1853/53912.

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The diffusion absorption refrigeration (DAR) cycle is a promising technology for fully thermally driven cooling. It is well suited to applications in medicine refrigeration and air-conditioning in off-grid settings. However, design and engineering knowhow for the technology is limited; therefore, system development has historically been an iterative and expensive process. Additionally, conventional system designs require high-grade energy input for operation, and are unsuitable for low-temperature solar- or waste-heat activated applications. In the present effort, component- and system-level

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Chan, Keng Wai. "Measurement and analysis of bubble pump and Einstein-Szilard single pressure absorption refrigeration system." Thesis, University of Oxford, 2011. http://ora.ox.ac.uk/objects/uuid:f10706c5-6952-4c50-9aef-065f1627a19b.

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The increasing demand for the domestic refrigeration system urges the development of greener form of refrigeration. The eighty-year-old single pressure absorption refrigeration system invented by Albert Einstein and Leo Szilard is attractive as it has no mechanical moving parts and can be driven by heat alone. However, the literature on either the refrigeration system or its components is scarce. The bubble pump is the crucial component of the refrigeration system, but it is poorly understood as its mass flow rate cannot be readily predicted. Two new time correlations in the mass flow rate pre

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Bahman, Ammar. "Modeling of Solar-Powered Single-Effect Absorption Cooling System and Supermarket Refrigeration/HVAC System." Scholar Commons, 2011. http://scholarcommons.usf.edu/etd/2993.

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This thesis consists of two different research problems. In the first one, the aim is to model and simulate a solar-powered, single-effect, absorption refrigeration system using a flat-plate solar collector and LiBr-H2O mixture as the working fluid. The cooling capacity and the coefficient of performance of the system are analyzed by varying all independent parameters, namely: evaporator pressure, condenser pressure, mass flow rate, LiBr concentration, and inlet generator temperature. The cooling performance of the system is compared with conventional vapor-compression systems for different re

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Alvares, Sergio Gontijo. "A Computer aided assessment study on the viability of a solar powered single stage aqua-ammonia absorption refrigeration system for milk cooling at remote Brazilian dairy farms /." [S.l.] : [s.n.], 1985. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=7717.

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ARAUJO, Thalita Pedon de. "Bioequivalência tópica de produtos contendo metronidazol através da dermatofarmacocinética (DPK)." Universidade Federal de Pernambuco, 2016. https://repositorio.ufpe.br/handle/123456789/17722.

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Book chapters on the topic "Single pressure absorption refrigeration"

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Dincer, Ibrahim, and Tahir Abdul Hussain Ratlamwala. "Single Effect Absorption Refrigeration System." In Integrated Absorption Refrigeration Systems. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-33658-9_3.

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Modi, Bhaumik, Bhavesh Patel, and Anurag Mudgal. "Thermo-economic Analysis of Biomass-Powered Single Effect LiBr/H2O Absorption Refrigeration System." In Renewable Energy and Climate Change. Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-32-9578-0_8.

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Omer, Abdeen Mustafa. "Some Aspects of Energy Efficiency for Refrigeration and Air Conditioning." In Handbook of Research on Modern Optimization Algorithms and Applications in Engineering and Economics. IGI Global, 2016. http://dx.doi.org/10.4018/978-1-4666-9644-0.ch031.

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Over the years, all parts of a commercial refrigerator, such as the compressor, heat exchangers, refrigerant, and packaging, have been improved considerably due to the extensive research and development efforts carried out by academia and industry. However, the achieved and anticipated improvement in conventional refrigeration technology are incremental since this technology is already nearing its fundamentals limit of energy efficiency is described is ‘magnetic refrigeration' which is an evolving cooling technology. The word ‘green' designates more than a colour. It is a way of life, one that is becoming more and more common throughout the world. An interesting topic on ‘sustainable technologies for a greener world' details about what each technology is and how it achieves green goals. Recently, conventional chillers using absorption technology consume energy for hot water generator but absorption chillers carry no energy saving. With the aim of providing a single point solution for this dual purpose application, a product is launched but can provide simultaneous chilling and heating using its vapour absorption technology with 40% saving in heating energy. Using energy efficiency and managing customer energy use has become an integral and valuable exercise. The reason for this is green technology helps to sustain life on earth. This not only applies to humans but to plants, animals and the rest of the ecosystem. Energy prices and consumption will always be on an upward trajectory. In fact, energy costs have steadily risen over last decade and are expected to carry on doing so as consumption grows. This article discusses the potential for such integrated systems in the stationary and portable power market in response to the critical need for a cleaner energy technology for communities. Throughout the theme several issues relating to renewable energies, environment and sustainable development are examined from both current and future perspectives.

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Pickard, John, and Nicholas Higgins. "Pseudotumour cerebri syndrome." In Oxford Textbook of Neurological Surgery, edited by Ramez W. Kirollos, Adel Helmy, Simon Thomson, and Peter J. A. Hutchinson. Oxford University Press, 2019. http://dx.doi.org/10.1093/med/9780198746706.003.0095.

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Pseudotumour cerebri syndrome, previously known as benign intracranial hypertension and more recently termed idiopathic intracranial hypertension, is characterized by headaches, raised intracranial pressure, and the risk of sudden irreversible visual loss. The pathophysiology of the condition is not fully understood but reduced cerebrospinal fluid absorption secondary to venous outflow obstruction seems to be an important factor. Treatment of patients with this condition is generally with lumbar punctures, weight loss, and lumboperitoneal shunts but ventriculoperitoneal shunts, subtemporal decompression, venous sinus stenting, and acetazolamide may also be used. Prognosis in pseudotumour cerebri syndrome is variable—some patients stabilize after a single lumbar puncture, while others have persistent symptoms for many years. A patient’s symptoms may improve and then recur years later, especially if weight has been lost and then regained again.

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Goody, R. M., and Y. L. Yung. "Band Models." In Atmospheric Radiation. Oxford University Press, 1989. http://dx.doi.org/10.1093/oso/9780195051346.003.0006.

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Radiative heating calculations in the atmosphere involve four distinguishable scales of frequency. First, there is the comparatively slow variation with frequency of the Planck function and its derivative with respect to temperature. About one-half of the radiation from a black body at terrestrial temperatures lies in a wave number range of 500 cm-1. The second scale is that of the unresolved contour of a band. For atmospheric molecules other than water vapor, the Planck function is effectively constant over a single band; water vapor bands must be divided into sections of the order of 50 cm-1 wide before this is so. For a rotating molecule, the next relevant scale of frequency is that of the spacing between rotation lines, approximately 1-5 cm-1. Finally, there is the monochromatic scale on which the absorption coefficient may be treated as a constant, and for which Lambert’s absorption law is obeyed: of the order of one-fifth of a line width ≃ 2 x 10-2 cm-1 for a gas at atmospheric pressure, down to 2 x 10-4cm-1 for a Doppler line in the middle atmosphere. This step takes us to a division of the frequency scale that, when taken together with other features of the calculation, presents a formidable computation task. Calculations can, of course, be made and are made at this limiting spectral resolution (line-by-line calculations) but, despite the fact that they are technically feasible with modern computers, such calculations are rare and are usually performed to provide a few reference cases. The great majority of investigations make use of averages over many lines, embracing spectral ranges that are small compared to a band contour (narrow-band models), or over complete bands (wide-band models), or over the entire thermal spectrum (emissivity models.) There are a number of reasons for working with spectral averages. Practical considerations are that important classes of laboratory measurements, and most atmospheric observations (e.g., satellite radiometry) are made with some spectral averaging, often comparable to that of narrow-band models.

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Conference papers on the topic "Single pressure absorption refrigeration"

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Chan, Keng Wai, and Malcolm McCulloch. "Analysis and Measurement of Bubble Pumps and Impact on Single Pressure Absorption Refrigeration Cycle." In 2010 IEEE Green Technologies Conference (IEEE-Green-2010). IEEE, 2010. http://dx.doi.org/10.1109/green.2010.5453798.

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Loyola França de Vasconcellos, Guilherme, Arthur Batista Martins Lott, João Arthur Daconti Silva, Sergio Hanriot, and Cristiana Maia. "Evaluation of the Influence of Ambient Temperature on the Performance Coefficient of a Refrigeration Cycle by Single Pressure Absorption." In Brazilian Congress of Thermal Sciences and Engineering. ABCM, 2018. http://dx.doi.org/10.26678/abcm.encit2018.cit18-0716.

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Xu, Shiming, Jian Liang, Yi Jian He, and Ru Xu Du. "Design and Experimental Investigation of a Diffusion Absorption Refrigeration System." In ASME 8th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2006. http://dx.doi.org/10.1115/esda2006-95130.

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This paper presents the design and experimental analysis of a compact Diffusion Absorption Air Cooler (DAAC) system, in which the Diffusion Absorption Refrigeration (DAR) technology is utilized. The system uses a bubble pump to replace the mechanical pump, uses three-component working fluid (NH3+H2O+He), and operates under the same system pressure level. Hence, it is quiet, long lasting and environmental friendly. To investigate the practicality of using the DAAC system for regional air conditioning, the thermodynamic model is derived to guide the system design first, and then a DAAC experimen

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Liu, Yunshan, and Ebrahim Al Hajri. "Mass and Heat Transfer Characteristics of a Single-High Aspect Ratio Microchannel Absorber." In ASME 2012 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/imece2012-89787.

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Recently, study on a microscale-based absorption refrigeration system has sprung up motivated by the need of efficient energy utilization. Heat-driven absorption systems offer a possibility of generating both power and cooling with environment friendly refrigerants, such as ammonia/water and LiBr/water. However, these systems are often large in size and low in COP especially in single stage absorption systems. These characteristics of absorptions systems make them unattractive in most cases. This work introduces the utilization of micro-channel enhanced surfaces as heat exchangers to enhance t

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Zaltash, Abdolreza, Andrei Petrov, Randall Linkous, Edward Vineyard, David Goodnack, and Bakarne Egilegor. "Performance Evaluation of a 4.5 kW (1.3 Refrigeration Tons) Air-Cooled Lithium Bromide/Water Hot-Water-Fired Absorption Unit." In ASME 2007 International Mechanical Engineering Congress and Exposition. ASMEDC, 2007. http://dx.doi.org/10.1115/imece2007-41380.

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During the summer months, air-conditioning (cooling) is the single largest use of electricity in both residential and commercial buildings with the major impact on peak electric demand. Improved air-conditioning technology has by far the greatest potential impact on the electric industry compared to any other technology that uses electricity. Thermally activated absorption air-conditioning (absorption chillers) can provide overall peak load reduction and electric grid relief for summer peak demand. This paper describes an innovative absorption technology based on integrated rotating heat excha

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Lear, W. E., J. F. Crittenden, J. R. Khan, and S. A. Sherif. "A Flexible Fuel Semi-Closed Combined Cycle for Power, Refrigeration and Water." In ASME Turbo Expo 2007: Power for Land, Sea, and Air. ASMEDC, 2007. http://dx.doi.org/10.1115/gt2007-27664.

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The High Pressure Regenerative Turbine Engine (HPRTE) has been investigated since the mid 1990s as the distributed energy system, among other applications, for civilian or military use. Previous literature describing its modeling and experimental demonstration have indicated several benefits, especially when combined with a Vapor Absorption Refrigeration System (VARS) in a novel way. The benefits includes increased efficiency, high part power efficiency, small lapse rate, compactness, low emissions, low air exhaust flows (which decrease filtration and ducting) and condensation of fresh water.

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Jo, Soo W., S. A. Sherif, and William E. Lear. "Numerical Simulations of Bubble Pumps." In ASME 2012 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/pvp2012-78867.

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A bubble pump is a key component for diffusion-absorption refrigeration systems operating at a single pressure. Nevertheless, research focusing on bubble pumps is not widely found in the literature. In this study, a bubble pump model with a shape of vertical tube subjected to a uniform heat flux from the tube outer surface is numerically simulated. A saturated ammonia-water solution enters the bubble pump inlet and receives heat from the pump wall along the entire pump length. During the process, most of the ammonia in the solution vaporizes, and the remaining solution is lifted by the buoyant

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Ahmed, Zayed, B. Terry Beck, and Mohammad H. Hosni. "The Effect of Temperature on Water Cavitation Phenomena in Converging-Diverging Nozzle Flow." In ASME 2017 Fluids Engineering Division Summer Meeting. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/fedsm2017-69544.

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A vapor-compression refrigeration cycle typically uses standard refrigerants as the working fluid. Traditional refrigerants, however, have been associated with Ozone level Depletion Potential (ODP) and significant Global Warming Potential (GWP). An innovative cooling technology has been investigated using sonic multi-phase flow in a critical-flow nozzle to create a low-pressure and low-temperature region for heat absorption. The strength of the new technology is its potential to produce cooling using water and/or other working fluids with low ODP and GWP. While the full potential for using wat

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Maisotsenko, Valeriy, and Ilya Reyzin. "The Maisotsenko Cycle for Electronics Cooling." In ASME 2005 Pacific Rim Technical Conference and Exhibition on Integration and Packaging of MEMS, NEMS, and Electronic Systems collocated with the ASME 2005 Heat Transfer Summer Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/ipack2005-73283.

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The Maisotsenko Cycle (M-Cycle) combines heat exchange and evaporative cooling [1–3] in an effective indirect evaporative cooling process resulting in product flow temperature approaching incoming air dew point (not wet bulb) temperature. Thermodynamically, the M-Cycle is based on air precooling before passing through the heat rejection water evaporating area, so the difference between the enthalpy of the air at its dew point temperature and the same air saturated at a higher temperature is used to provide cooling capacity to reject the heat, for example from the electronics. Today Delphi Corp

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Shahboun, Islam Kamel, and Salem Omran Adeilla. "Performance Analysis of a Solar Driven Single Stage LiBr/H2O Absorption Refrigeration system." In The First Conference for Engineering Sciences and Technology. AIJR Publisher, 2018. http://dx.doi.org/10.21467/proceedings.4.46.

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