Energy and exergy analysis of an absorption heat transformer by using loop heat pipe

The growing trend of human society's need for energy consumption and the problems in energy production, leads to paying attention of researchers to recycle and improve the quality of waste heat sources. In this regard, an absorption heat transformer is one of the most attractive energy-saving technologies. Also, the loop heat pipe is a simple device that is able to transfer heat over long distances.Using the loop heat pipe as heat exchangers inside the absorption heat transformer system can lead to improving its performance. Therefore, it is necessary and important to assess the feasibility and effect of using the loop heat pipe in the absorption heat transformer system. In this study, at first, both of the mentioned systems were analyzed and validated separately from the thermodynamic point of view. Then, the thermodynamic analysis of the absorption heat transformer system integrated with the loop heat pipe was done and its performance was compared with the conventional absorption heat transformer cycle. All investigations are done in the EES software and the working fluid of the cycle is LiBr-H2O. The results show that the COP and ECOP of the combined cycle are higher than the conventional absorption heat transformer cycle.