Ecological optimization for an irreversible magnetic Ericsson refrigeration cycle

Abstract

An irreversible Ericsson refrigeration cycle model is established, in which multi-irreversibilities such as finite-rate heat transfer, regenerative loss, heat leakage, and the efficiency of the regenerator are taken into account. Expressions for several important performance parameters, such as the cooling rate, coefficient of performance (COP), power input, exergy output rate, entropy generation rate, and ecological function are derived. The influences of the heat leakage and the time of the regenerative processes on the ecological performance of the refrigerator are analyzed. The optimal regions of the ecological function, cooling rate, and COP are determined and evaluated. Furthermore, some important parameter relations of the refrigerator are revealed and discussed in detail. The results obtained here have general significance and will be helpful in gaining a deep understanding of the magnetic Ericsson refrigeration cycle.

Analyses of an air conditioning system with entropy generation minimization and entransy theory

“…The analyses and optimizations of air conditioning systems have attracted more and more attention because they are very important for energy conservation and the reduction of cost. [1][2][3][4][5][6][7][8][9][10] In order to improve the system performance and increase the energy utilization, some optimization theories have been developed, such as the entropy generation minimization [11] and the entransy theory. [8] The entropy generation minimization has been widely used in the analyses and optimizations of thermal systems.…”