摘要
本文详细讨论了透明盖板吸收太阳辐射较强时太阳能集热器的效率表示式。分析表明,从物理含义及实际应用考虑,选用包含光学效率(τα)。和实际热损系数U'的表示式比之选用包含τα有效乘积(τα)。和忽略透明盖板对太阳辐射吸收时的热损系数U的表示式更合理。
The efficiency expression of a collector with a cover having comparatively high absorption for solar radiation is analysed and discussed in detail. It is shown that, based on the physical content and for practical application, the choice of expression containing (τα).-the optical efficiency, and U'-the actual heat loss coefficient is preferable to and expression containing (τα).-effective taproduct and U-the heat loss coefficient neglecting absorption of solar energy by the cover.
