The most widely early solar energy application that is used to heat water, and now the world millions of solar water heating device.
早期最广泛的太阳能应用即用于将水加热，现今全世界已有数百万太阳能热水装置。
The house is provided with solar panels for water heating and a high energy efficient device for ventilation.
这栋房子还配置着太阳能热水器和高效节能的通风设备。
Even though the control device of the heating system works well, insufficient water flow rates can degrade control performance and thermal comfort.
即使供热系统的控制装置运行良好，水的流速不足也能够降低控制性能和热舒适性。
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