Passive cooling:
Passive cooling is a building design approach that focuses on heat gain control and heat dissipation in a building in order to improve the indoor thermal comfort with low or nil energy consumption.
en.wikipedia.org
无动力制冷:
无动力制冷（passive cooling），由德国法兰克福的考斯特博士（Dr. Helmut Köster）首创的概念，通过改变百叶窗表面的形状，在导入太阳光作为室内自然光源的同时，又能够有效将紫外线与太阳热能阻挡在了室外，使得室内温度不会随着太阳光的导入而急速提升，从而降低了室内对于制冷能耗的需求。
zh.wikipedia.org
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Passive cooling无动力制冷