Steffen Klöppel

Experimental Results of A Novel Two-Phase Water Ejector Design for High-Temperature Heat Pump Applications

Abstract High-temperature heat pumps (HTHPs) are a key technology for decarbonizing industrial process heat. Within such systems, two-phase water ejectors offer a promising opportunity to function as secondary steam compressors. By entraining hot steam with high-pressure water, t...

Transcritical–Transcritical Cascade CO2 Heat Pump with Expansion Work Recovery: A Thermodynamic Analysis

High-temperature heat pumps are a promising pathway for electrifying industrial process heat, but their application to large-temperature-glide duties remains technically challenging. Milk powder spray drying is one such application, requiring air heating to approximately 200 °C w...