Surface water heat pumps (SWHPs) are energy-efficient devices for heating and cooling that use surface water as a heat source and sink.

水源热泵是一种利用地下浅层水资源(地表水或地下水)，既可供暖又可制冷的高效节能热泵系统。

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Several countries have used subsidies to jump-start the market, including Japan, where almost 1 million heat pumps have been installed in the past two years to heat water for showers and hot tubs.

一些国家利用补贴来启动这个市场，包括日本，在过去两年中日本安装了近100万台热泵，为淋浴和热水浴缸提供热水。

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One being tested at Victoria station pumps river water through heat exchangers.

其中一种方法便是将河水抽入换热器，这种方法正在维多利亚车站试验中。

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Among the energy-saving options, two promising technology switches are the electrification of transportation (electric vehicles can be about four times as energy-efficient as standard fossil-fuel vehicles) and the use of electric-powered heat pumps to deliver winter heating and hot water (heat pumps can be four times as energy-efficient as standard heaters).

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One being tested at Victoria station pumps river water through heat exchangers.

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The tsunami destroyed the diesel generators that provide power to drive the pumps that circulate the water coolant through the reactor that removes decay heat.

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