Possible Waste Heat Recovery in the Condenser of a Regenerative Steam Cycle

Abstract

The present work is concerned with a new steam cycle proposed as a modification to the normal regenerative steam cycle. A steam ejector and an extra feed water heater are incorporated into the latter cycle. The motive steam of the ejector is bled from the steam turbine. The ejector entrains a portion of the saturated steam exiting the turbine and entering the condenser. Both amounts of motive and entrained steam are raised in pressure and used as heating steam in the first feed water heater. The saturated water getting out of this feed water heater is further heated in the second feed water heater and the cycle is then completed. Thermodynamic analyses of the proposed cycle are developed and used for predicting the characteristic performance of the proposed cycle. The results of the current work show clearly that the thermal efficiency of the proposed cycle is always greater than that of the normal regenerative steam cycle.