Effects of different temperature levels at generator and evaporator on the performance of vapour absorption heat transformers

In a vapour absorption heat transformer, heat is input at both the evaporator and the generator, and useful heat is delivered at the highest temperature at the absorber. Based on an earlier thermodynamic analysis by the authors, the effects of heat supply at different temperature levels to the evaporator and generator are studied here. It is observed that, when two heat sources at different temperature levels are interchanged between the evaporator and generator, there is no noticeable change in the system performance. However, for design and operational reasons, it is recommended that the higher temperature heat source be input at the generator. Copyright © 1992 John Wiley & Sons, Ltd.