Performance Analysis and Evaluation of a Supercritical CO2 Rankine Cycle Coupled with an Absorption Refrigeration Cycle

2020 ◽  
Vol 29 (4) ◽  
pp. 1036-1052
Author(s):  
Yi Chen ◽  
Dongjie Xu ◽  
Zheng Chen ◽  
Xiang Gao ◽  
Fukang Ren ◽  
...  
Keyword(s):  
Performance Analysis ◽  
Supercritical Co2 ◽  
Rankine Cycle ◽  
Refrigeration Cycle ◽  
Absorption Refrigeration ◽  
Analysis And Evaluation

On Evaluating Efficiency of a Combined Power and Cooling Cycle

2003 ◽  
Vol 125 (3) ◽  
pp. 221-227 ◽  
Author(s):  
Sanjay Vijayaraghavan ◽  
D. Y. Goswami
Keyword(s):  
Rankine Cycle ◽  
Exergy Efficiency ◽  
Combined Cycle ◽  
Maximum Efficiency ◽  
Second Law ◽  
Refrigeration Cycle ◽  
Absorption Refrigeration ◽  
Cooling Cycle ◽  
Reduced Gradient ◽  
Generalized Reduced Gradient

A combined power and cooling cycle is being investigated. The cycle is a combination of the Rankine cycle and an absorption refrigeration cycle. Evaluating the efficiency of this cycle is made difficult by the fact that there are two different simultaneous outputs, namely power and refrigeration. An efficiency expression has to appropriately weigh the cooling component in order to allow comparison of this cycle with other cycles. This paper develops several expressions for the first law, second law and exergy efficiency definitions for the combined cycle based on existing definitions in the literature. Some of the developed equations have been recommended for use over others, depending on the comparison being made. Finally, some of these definitions have been applied to the cycle and the performance of the cycle optimized for maximum efficiency. A Generalized Reduced Gradient (GRG) method was used to perform the optimization. The results of these optimizations are presented and discussed.

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