Engineers in Germany have developed a functional brine heat pump using a fully hermetic compressor with a heating capacity of 11.4kW using only 146g of propane. This low refrigerant charge would permit it to be installed inside buildings without undergoing extensive safety precautions. Per kilowatt of heat output, the unit requires only about one-fifth the amount of propane compared to systems on the market. Click here to read the full article. (Source: Cooling Post)
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