The circulation of water through this system is described by the hydrologic cycle.

水在这个体系中的循环是用水循环来描述的。

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Then, the effects of height difference between storage tank and collector, mass of storage water and cycle pipe diameter on system performance were analyzed.

然后，利用数学模型对储水箱与集热板之间高差、系统储水量和循环管径等因素对系统性能的影响进行了预测分析。

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Hot water system of water and water collector between tank cycle.

热水系统用水使水在收集器与储水箱之间循环。

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Only when information is available on the impacts of products on the water cycle system will consumers be able to make conscious choices about what they buy.

UNESCO: MEDIA SERVICES