The aim of the study is to compare between the effects of using two planesudmirror concentrator and that without mirror on the flat plate collector. The work is performedudon solar water heating system with flat plate collector installed in it. Measuring of the data areudtaken between 9.00 to 16.00 h over a day. Based on the global and diffuse radiations with theudaverage of 594 and 119 W/m2, the average efficiencies of the system over a day are 41.90 %udand 22.80 % for collector with and without mirror respectively
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机译：该研究的目的是比较使用两个平面 udmirror集中器与在平板收集器上不使用镜子的效果之间的比较。该工作是在安装有平板集热器的乌冬面太阳能热水系统中进行的。在一天的9.00到16.00 h之间进行数据测量。根据平均辐射为594和119 W / m2的全局辐射和散射辐射，一天中该系统的平均效率对于有镜和无镜的集热器分别为41.90％ ud和22.80％
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