Article ID: 23-07_OA
Industrial heat pump is recognized as one of decarbonization technologies in industry by a couple of its high efficiency and electrification with low carbon electricity. For expanding applications of heat pumps into various industrial heating processes, it is necessary to increase the supply temperature of heat pumps. Recently, some new refrigerants have been developed, which allows to expand the options of refrigerants expected to be applied to high temperature heat pumps. The purpose of this study is to illustrate working domain map which can determine the promising refrigerant and the upper limit of heat pumping temperature lift for each supply temperature. With thermodynamic analysis for simple heat pump cycle, refrigerant selection in the wide range of the heat pump supply temperature from 60°C to 200°C is analyzed comprehensively for 17 pure refrigerants currently available on the market. In addition, the effect of an energy efficiency improvement by two-stage cycle with economizer is examined on the refrigerant selection.
