摘要
对家用太阳热水器热性能的评价方法进行了分析。国标中采用“平均日效率”反映热水器的热性能有一定局限性 ,“平均热损系数”定义的物理含义不清晰 ,数学表达式的推导也值得商榷。国标中提出的测定水箱平均水温的方法对不同种类的热水器及不同种类的水箱会带来不易控制的误差。
Comments on the test method for rating thermal performance of a domestic solar water heater in National Standard GB/T 12915 91 are given in this paper.It is indicated that the test method based on typical daily average thermal efficiency of a solar water heater could not give its actualy yearly performance prediction.Besides,the calculation of average heat loss coefficient as well as the measurement of average water temperature in the water tanke still leave some questions to be further examined.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2000年第3期248-252,共5页
Acta Energiae Solaris Sinica
关键词
太阳能
热水器
热性能
试验
solar water heater,testing standard,forecast of thermal performance
