Evaluation of the thermodynamic effectiveness of a plate heat exchanger integrated into an experimental single stage heat transformer operating with Water/Carrol mixture

This paper analyzes the effectiveness of a Plate Heat Exchanger (PHE) used as an economizer integrated into an experimental Single Stage Heat Transformer (SSHT). The heat exchanger effectiveness (eta), some-times referred as thermal efficiency, is an important parameter for the design of heat transfer equipment. Two thermodynamic methods for eta evaluation are shown. The overall heat transfer coefficient (U) and the individual convective heat transfer coefficients (h) were calculated for Water/Carrol mixture. Four SSHT experimental tests runs were carried out, in order to evaluate the eta. The economizer effectiveness ranged from 0.69 to 0.71. Finally, the eta effect for Coefficient of Performance (COP) is shown as a function of absorber temperature. (C) 2013 Elsevier Inc. All rights reserved.