Results 141 to 150 of about 423 (182)
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Solar Cooling with Absorption Chillers: Control Strategies and Transient Chiller Perfomance
2006This thesis reports on improvements of the state of the art in controlling solar cooling systems with absorption chillers. In this context, two main approaches are being presented. In the first approach, control strategies for the system circuits are being presented and discussed.
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Development of a solar-driven diffusion absorption chiller
Solar Energy, 2019Abstract Nowadays, the diffusion absorption process is well known and mainly used as refrigerators in hotels and caravans. The huge advantage of this process is the noiseless and wear-free operation due to the absence of moving parts. There are few studies where the diffusion absorption process is combined with solar cooling.
Fabian Schmid +2 more
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Investigation of a Ammonia-Water Absorption Chiller Performance
2010 Asia-Pacific Power and Energy Engineering Conference, 2010An experimental prototype of a single stage ammonia-water absorption chiller was designed, built and tested. The thermodynamic models of the components, based on the First and Second Laws, have been assembled so as to quantify the simultaneous heat and mass transfer processes occurring within the exchangers.
Dingfeng Kong +3 more
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Experimental study of an ammonia-water absorption chiller
International Journal of Refrigeration, 2012Abstract This paper presents the performance of an ammonia-water absorption chiller. This single-stage 10 kW absorption chiller is cooled with a water-ethylene glycol solution. The required heat source is hot water between 75 °C and 85 °C. Different operating conditions can be imposed by varying temperatures and flow rates of secondary circuits and ...
Brice Le Lostec +2 more
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Absorption chillers - Water-Lithium bromide systems
2020Les machines à absorption liquide eau-bromure de Lithium représentent une gamme majeure de groupes refroidisseurs de liquide fournissant de l’eau glacée à 7 °C à partir d’une source chaude thermique (eau chaude, vapeur, gaz naturel ou fuel, etc.) et en rejetant de la chaleur à la température ambiante.Plusieurs types d’unités fonctionnant avec des ...
Meunier, Francis, Neveu, Pierre
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Thermodynamic evaluation of triple effect absorption chiller
2008 Second International Conference on Thermal Issues in Emerging Technologies, 2008Water lithium bromide vapour absorption cooling systems, both single and double effect, are being used extensively for air conditioning. However, relatively few works are available on triple effect absorption cooling system and the published literatures are silent on the exergetic analysis of this system.
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Thermodynamic modeling of an ammonia–water absorption chiller
International Journal of Refrigeration, 2002Abstract This article develops a general thermodynamic framework for the modeling of an irreversible absorption chiller at the design point, with application to a single-stage ammonia–water absorption chiller. Component models of the chiller have been assembled so as to quantify the internal entropy production and thermal conductance (UA) in a ...
H.T. Chua, H.K. Toh, K.C. Ng
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Performance Analysis of Absorption Chillers Using Data Reconciliation
ASME 2010 10th Biennial Conference on Engineering Systems Design and Analysis, Volume 1, 2010Performance data obtained from measurements of process variables usually do not obey material and energy conservation laws. This is why a data reconciliation process, that is, the adjustment of measured data to obey the conservation laws and other constraints is necessary in order to characterize the real performance of equipment, processes, or the ...
David E. Martinez +3 more
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Solar Absorption Chiller Optimization by Using Genetic Algorithms
ASME 2010 4th International Conference on Energy Sustainability, Volume 2, 2010The main propose of this research is providing a tool for suitable modeling, increase efficiency and decrease construction cost of solar absorption chiller. At first, the solar absorption chiller is modeled by the thermodynamic laws. Then, this model is converted to the new standard mathematical programming model with considering all technical and ...
Ali Abbasi Godarzi +3 more
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