Advancing Water Vapor Based High-Temperature Heat Pumps: Extending Temperature Ranges and Industrial Applications

Kurzfassung

The additional multi-compression stage utilizing split flow has been introduced to enhance the supply temperature of the existing high-temperature heat pump (HTHP) system to 250°C. Under specific temperature boundary conditions, the HTHP without split flow maintains a constant COP regardless of the mass flow rate. However, as the split ratio increases, the COP decreases due to the increased compressor power consumption exceeding the heat capacity enhancement from the additional stages. Assuming optimized operating strategies, the advanced HTHP with additional stages demonstrates high potential to extend the application range and simultaneously meet multiple industrial process heat demand by increasing the supply temperature.