Performance analysis for endoreversible closed regenerated Brayton heat pump cycles

Finite-time thermodynamic performance of isentropic closed regenerated Bray ton heat pump cycles coupled to constant-and variable-temperature heat rese rvoirs has been analyzed in this paper. The relations between heating load and pressure ratio and between COP (coefficient of performance) and pressur e ratio are derived for the two cases of heat reservoirs. In the analysis, the sole irreversibility is the heat resistance losses in the heat exchange rs between the working fluid and the high, and low, temperature heat reserv oirs and the regenerator. A numerical example is also given. (C) 1998 Elsev ier Science Ltd. All rights reserved.