Exergy-based ecological analysis of generalized irreversible heat pump system

A reverse carnot cycle forms the basis of all heat-pump cycles in providing heating and cooling loads. the optimal exergy-based ecological analysis of an irreversible heat-pump system with the losses of heat resistance,heat leak and internal irreversibility has been carried out by taking into account exergy based ecological function (e) as an objective in the viewpoint of finite-time-thermodynamics (ftt) or entropy generation minimization (egm). exergy is defined here as the power required minus the lost power. the effects of irreversibilities along with internal heat leakage on coefficient on the performance of the system are investigated. the exergy based ecological function decreases steadily with irreversibilites and heat leakages in the system. cop in such a system increases with the cycle temperature ratio. if a heat pump cycle is optimized with above mentioned criterion,there is a trade-off between its coefficient of performance and the heating load it provides. © school of engineering,taylor's university.