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conditions, and found that a decrease in condenser and absorber temperatures and an increase in generator and evaporator temperatures brought about an increase in system performance. Their result also showed that the entropy generation in the refrigerant expansion valves, refrigerant heat exchanger and solution pump were negligible when compared to the total entropy generation in the entire system. The generator was found to have the greatest impact on the COP and the entropy generation, while the non-dimensional entropy generation in the generator, absorber and evaporator accounted for about 90% of entropy generation in the system. Hence, they advised that such components need to be designed to minimize entropy generation. Sedighi et al. (2007) carried out an exergetic analysis and parametric study of H2O.LiBr AR systems. They found that the solution heat exchanger (SHE) demonstrated a more significant impact on the system performance than the refrigerant heat exchanger (RHE). They also noticed that the RHE could cause crystallization when it increased the outlet temperature of the absorber. Also, a reduction in the cooling water temperature was found to improve the COP and exergetic COP (ECOP), and so did an increase in the evaporator temperature; however, the later caused a reduction in the ECOP of the system. Lee and Sherif (2000) conducted thermodynamic analysis of an H2O.LiBr absorption system for cooling and heating applications, by investigating the first and second law efficiencies of the system over a host of operating conditions. They stated clearly from their results that a lower cooling water 71PDF Image | Northumbria Research Link
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