If the ground-source heat pump are used in open systems, namely the use of direct extraction of groundwater and pumps refrigerant for heat exchange, and at suitable locations recharge or discharge.
如果地源热泵采用的是开路系统，即利用水泵直接抽取地下水与制冷剂进行热交换，并在合适地点回灌或排放。
VRF F system is a kind of direct evaporation refrigerant system.
多联机系统是一种直接蒸发式冷媒系统。
Various models are available, including those for industrial-grade environments and for direct immersion in water or refrigerant.
型号有多种，在那些工业环境和直接侵入水或冷却剂的环境下也可使用。
It is noted that all these four schemes are economically feasible. The one based on a direct evaporation of refrigerant and low-temperature air supply system enjoys the best economy.
这四种方案在经济上是可行的，其中以冷媒直接蒸发，低温送风系统的经济性最佳。
It is noted that all these four schemes are economically feasible. The one based on a direct evaporation of refrigerant and low-temperature air supply system enjoys the best economy.
这四种方案在经济上是可行的，其中以冷媒直接蒸发，低温送风系统的经济性最佳。
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