Optimal Cooling Load and COP Relationship of a Four-Heat-Reservoir Endoreversible Absorption Refrigeration Cycle

Abstract: On the basis of a four-heat-reservoir endoreversible absorption refrigeration cycle model, another linear heat transfer law [i.e., the heat-flux Q ∝ ∆( T −1 ) ] is adopted, the fundamental optimal relation between the coefficient of performance (COP) and the cooling load, as well as the maximum cooling load and the corresponding COP of the cycle coupled to constant-temperature heat reservoirs are derived by using finite-time thermodynamics or thermodynamic optimization. The optimal distribution of the heat-transfer surface areas is also obtained. Moreover, the effects of the cycle parameters on the COP and the cooling load of the cycle are studied by detailed numerical examples. The results obtained herein are of importance to the optimal design and performance improvement of an absorption refrigeration cycle. Keywords: Finite Time Thermodynamics, Thermodynamic Optimization, Four-Heat- Reservoir Endoreversible Absorption Refrigeration Cycle, Optimal Performance __________________________________________________________________________________

[1]  Fengrui Sun,et al.  Optimal performance of an irreversible absorption refrigerator , 2002 .

[2]  Adrian Bejan,et al.  Thermodynamic Optimization of Solar-Driven Refrigerators , 1996 .

[3]  Peter Salamon,et al.  Thermodynamic optimization of finite time processes , 2001 .

[4]  A. Bejan.  Entropy generation minimization: The new thermodynamics of finite-size devices and finite-time processes , 1996 .

[5]  Lingen Chen,et al.  Optimal Performance of an Endoreversible Four-Heat-Reservoir Absorption Heat-Transformer , 2004, Open Syst. Inf. Dyn..

[6]  Jincan Chen,et al.  An optimal endoreversible three‐heat‐source refrigerator , 1989 .

[7]  Chih Wu,et al.  The R-ϵ characteristics of a three-heat-source refrigeration cycle , 1996 .

[8]  Lingen Chen,et al.  Optimal performance coefficient and cooling load relationship of a three-heat-reservoir endoreversible refrigerator , 1997 .

[9]  Lingen Chen,et al.  Finite Time Thermodynamic Optimization or Entropy Generation Minimization of Energy Systems , 1999 .

[10]  A. Bejan,et al.  Optimal allocation of a heat-exchanger inventory in heat driven refrigerators , 1995 .

[11]  Bahri Sahin,et al.  Thermoeconomic optimization for irreversible absorption refrigerators and heat pumps , 2003 .

[12]  N. E. Wijeysundera.  Simplified models for solar-powered absorption cooling systems , 1999 .

[13]  Jincan Chen,et al.  The optimum performance characteristics of a four-temperature-level irreversible absorption refrigerator at maximum specific cooling load , 1999 .

[14]  Selahatti̇n Göktun.  Optimal performance of an irreversible refrigerator With three heat sources (IRWTHS) , 1997 .