关键词: 平板集热器, 瞬时效率, 日平均效率, 升温性能, 日有用得热量

Abstract:

       We perform comparative tests for vertical and horizontal flow solar collectors. We further calculate and  comparatively analyze the heat performance of these two water heaters. Results show that the horizontal flat panel solar water heater is superior to the vertical one in instantaneous efficiency, average daily efficiency,  daily useful energy and warming performance.

Key words: flat solar collector, instantaneous efficiency, average daily efficiency, warming performance, daily useful energy