Fraunhofer ISE Test Rig for Heat Pumps with Steam Generation up to 160 °C

Fraunhofer ISE is conducting research on large, high-temperature heat pumps designed for industrial processes and district heating networks. The key instrument is a test rig that analyses parameters of process steam and pressurised hot water at temperatures up to 160 °C.

Operational data from five large heat pumps operating in district heating networks show that a unit's efficiency and availability are influenced not only by its design parameters but also by the nature of the heat source, the method of hydraulic connection, and the chosen operating strategy.

Based on these data, the researchers are developing models, safety concepts, and approaches to economical operation of the units.