Heat pumps with solution cycle for high temperature applications – natural refrigerants, high efficiency, wide range of applications

Heat pumps with solution cycle are a relatively unknown technology for industrial heat supply and district heating. These heat pumps work with ammonia and water. These natural refrigerants have no greenhouse effect and do not contain PFAS, which means long-term planning security. Thanks to their special thermodynamic cycle, they can provide heat at temperatures of up to 160 °C. In addition, they achieve very high efficiency in applications with large temperature spreads on the heat source and heat sink sides.

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Publication type Conf Proceedings Paper

Publication date 26 May 2026

Authors Klaus Ramming, Marian Zengerle

Keywords ammonia;Osenbrück cycle; Caldora; absorption; natural refrigerant; efficiency; temperatur spread;high temperature heatpump; industrial heat pump

Order nr HPT_124_23

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