Today many homes use solar energy for space heating. There are two general types of solar space heating systems: passive and active.
如今许多的家庭都采用太阳能供暖，其中有两种普遍的太阳能供暖形式：积极供暖与消极供暖。
The challenge confronting any solar heating system-whether passive, active, or hybrid-is heat storage.
太阳能供暖系统——无论是消极、积极还是混合模式——面临的一项挑战就是热量的储存。
In this thesis, a new solar active heating system with air collectors collecting and soil heat storage is studied for greenhouses heating.
本论文研制一种以空气为载热介质的太阳能空气集热-土壤蓄热的增温系统，应用于农业温室。
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