Chemical Engineering Research & Design, Vol.78, No.2, 180-183, 2000
On intrinsic exergy efficiency and heat pumps
Exergy analysis provides an assessment of the degree of thermodynamic perfection of a process. Several exergy efficiency definitions have been proposed among which is the intrinsic efficiency which is based on the concept of transiting exergy. This method of analysis has been applied to absorption heat pumps and the results are presented. It is shown that when the analysis is limited to heat fluxes, the intrinsic exergy efficiency becomes equivalent to a particular case of the well known thermodynamic efficiency based on the second law analysis, which is simpler computationally and conceptually, and has a broader scope.
Keywords:exergy analysis;heat pumps;intrinsic efficiency;transiting exergy;thermodynamic coefficient;absorption heat pumps