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2009年初奥地利Frigopol公司开始上市一种工业用空气-空气热泵,采用由氨和二甲基乙醚(dimethyl ether)组成的混合制冷剂R723。热泵机组容量为24kW,可提供45°C以下的热水用于房间取暖、也可提供65°C以下的热水用于工业过程。热泵的主机是变频控制的半封闭压缩机,系统注有3.5kg
In early 2009, Frigopol of Austria started listing an industrial air-to-air heat pump using a mixed refrigerant R723 composed of ammonia and dimethyl ether. The heat pump unit has a capacity of 24kW and supplies hot water below 45 ° C for room heating and hot water below 65 ° C for industrial processes. Heat pump host is a semi-her closed-loop compressor control, the system note 3.5kg