In underground water source heating pump air-conditioning system of one guesthouse project, the heating pump unit does not always run at full load status.

某宾馆工程地下水源热泵空调系统中，热泵机组在实际运行中不总处于满负荷运行状态。

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The underground water source heat pump and floor heating system are introduced, and the system combined wth these two systems are put forward and the benefits are analyzed in this paper.

介绍了地下水源热泵机组与地板供暖结合的供暖系统，提出了两个系统结合用于冬季供暖的方案并分析了两者结合应用的优点。

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The article discusses the operation safety problems that the sewage pipe is leaked and the underground water source is polluted in the operation of the urban drainage system in Handan City;

该文论述了邯郸城市排水系统运行中存在的污水管道渗漏，污染地下水资源； 汛期道路和下穿立交桥下积水影响交通；

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Ostensibly, Obama made the decision to block the pipeline because of concern over contamination of the Ogallala Reservoir, a vast underground water source that makes much of Midwestern agriculture possible.

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In arid regions, in places feeling a need for the lack of water, underground water resources are often the only source of fresh water.

UNESCO: OFFICE IN TASHKENT

To put that figure in context, Iannelli says that the energy required to pump freshwater from underground (which, he says, is the most common source of drinking water in the West) typically produces just over 1.5 tonnes of CO2 per million gallons.

CNN: Counting the carbon cost of bringing water to the desert