18 May 2017

O.3.4.4 Performance analysis of a high-temperature heat pump with ejector based on butane as the refrigerant

The performance of an innovative concept for highly efficient heat pump suitable for industrial applications is presented in this paper. The heat pump is based on butane as the refrigerant, therefore a set of safety and design considerations were undertaken given the flammability of the refrigerant. For improved energy efficiency, the heat pump configuration with ejector was designed. The quantification of the energy performance was realized by a measurement campaign on the heat pump prototype, which was aiming at the temperature levels relevant for industrial applications: from 50–80°C range on the low temperature side, to 100–130°C range on the high temperature side. The final outcome of this analysis is the evaluation of the efficiency increase for the heat pump design with ejector, as compared to a standard configuration.