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Title: | Exergy maximization in refrigeration storage units with heat leak |
Authors: | Sahoo, R K |
Keywords: | refrigeration heat leaks thermodynamics |
Issue Date: | 1989 |
Publisher: | Elsevier |
Citation: | Cryogenics, Vol 29, Iss 1, P 59-64 |
Abstract: | This Paper presents Second Law of Thermodynamics analysis techniques for sensible refrigeration energy storage units with non-adiabatic boundaries. The investigation is based on the minimization of entropy production due to a finite temperature difference. The results of this study indicate three basic points: 1, in the presence of heat leaks, the irreversibility rate is more than in its absence; 2, the increase in irreversibility due to heat leaks reduces the effective N(sub)tu exponentially; 3, there exists a dimensionless optimum time parameter which relates two other fundamental dimensionless parameters for the maximization of useful work stored. These fundamental parameters are N(sub)tu associated with heat flow across the non-adiabatic wall and N(sub)tu of the storage unit. These points suggest that the leakage heat affects the entropy production adversely and hence it should be kept at a minimum. |
Description: | Copyright for this article belongs to Elsevier Science Ltd http://dx.doi.org/10.1016/0011-2275(89)90013-1 |
URI: | http://hdl.handle.net/2080/167 |
Appears in Collections: | Journal Articles |
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