Vacuum tube solar water heater is composed of heat collector, water tank and related accessories, convert solar energy into heat energy relying mainly on tube.
真空管式家用太阳能热水器是由集热管、储水箱及相关附件组成，把太阳能转换成热能主要依靠集热管。
Solar water heater is renewable energy sources product which widely used in China. It can be devided into vacuum tube solar water heater and flat panel solar water heater.
太阳能热水器是我国太阳能热利用较成功的可再生能源产品，太阳能热水器按选用的集热器种类可分为真空管型太阳能热水器和平板型热水器。
In the case of constant pipe diameter, lengthening the length of vacuum tube is an effective way to increase the total heat of solar water heater!
在管径恒定的情况下，加长真空管的长度是增加太阳能热水器总得热量的有效途径和方向！
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