虹吸式真空管太阳能热水器热性能研究

A high efficiency siphoning mode evacuated-tube solar hot water collector

研制了一种虹吸式高效真空管太阳能热水器 .该热水器具有热效率高、散热系数小、全年使用时间长、四季有用热能获得量基本均衡的特点 ,提高了热水器的有效热转移因子 .集热管下面专门设计的聚光反射板 ,与水箱上的平面反光镜面一起最大限度提高了正午前后的效率 ,使瞬时效率在一天内基本不变 .与普通真空管太阳能热水器相比 ,日效率可提高 1 5%以上 .

New technology of siphon off water is adopted in our country for the first time. A high efficiency_siphoning mode evacuated_tube solar hot water collector has been developed successfully. It has the properties of high efficiency, lower loss coefficient, prolonged use in a full year and basically balanced amount in four seasons. The effective heat removal factor F c is increased. A specially designed light gathering reflecting board under the evacuated_tuber together with the surface reflective mirror increase thermal efficiency at noonday, making the instantaneous efficiency steady in almost one day. Compared with ordinary evacuated_tuber solar hot water collector, its daily thermal efficiency increases by 15% or more.