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Record: heat pump less than 10 g of propane per kW

German researchers have developed a refrigeration circuit integrating a propane heat pump that achieves a heating power of 12.8 kW with only 124 g of refrigerant. 

As part of “LC150” (Low Charge 150 g) project, funded by the German Federal Ministry of Economics and Climate Protection, the Fraunhofer Institute for Solar Energy Systems and a consortium of heat pump manufacturers are developing a low refrigerant charge refrigeration circuit with a propane heat...

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