太阳能热泵-地板辐射供热系统实验研究

Experimental study on combined solar-assisted heat pump and radiant floor heating systems

实验研究了太阳能热泵-地板辐射供热系统的性能,并与燃油、燃气锅炉集中供热系统进行了经济性分析比较。实验结果表明,热管真空管集热器的集热效率为64·4%,U形管真空管集热器的集热效率为59%,热泵机组的能效比为3·08;室内温度变化相对机组供热时间滞后3h,有利于采用间歇运行方式降低运行费用。经济性分析结果表明,在青岛地区为节能型建筑供热时,该系统的单位面积费用年值介于燃气、燃油锅炉集中供热之间。

Experimentally studies the performance of the combined system and compares the economics of the system with those of oil boiler and gas boiler centralized heating systems. The experimental result shows that the efficiency of the heat-pipe vacuum-tube heat collector is 64. 4%, while that of the U-type Vacuum-tube heat collector is 59%, and the EER of the heat pump is 3.08; the time of indoor temperature rising is lagged about 3 hours relative to the unit heating time, which is beneficial for adopting the intermittent heating mode to reduce running expenses. The economic analysis results indicate that the annual computational cost per unit area of the combined system is between the gas boiler system and the oil boiler system when applied to energy saving buildings in Qingdao.