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Experimental and numerical investigations of the thermal behavior of small solar ponds with wall shading effect

机译：带有遮阳效应的小型太阳池热行为的实验和数值研究

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摘要

In this study, a combined numerical and experimental investigation of the thermal behaviour of small solar ponds with various shapes, is presented. For this purpose, two prototypes of solar ponds with square and circular cross sections and similar volumes were examined. In the small solar ponds, the side walls shading affects accumulation and storing the solar thermal energy. Therefore, for evaluating the effect of shadow shape and size on the pond performance, a model for temperature distribution in a solar pond was presented, and the thermal behaviour of the pond was investigated considering the shadow effects. Temperature changes in the storage zone were calculated numerically and compared with the experimental results. According to the results, by considering the shadow effect, the maximum temperatures of circular and square ponds were 66.8 degrees C and 65.8 degrees C, respectively. Also, the effect of the angular placement of ponds on various geographical directions has been investigated. The maximum temperature was obtained at the placement angle gamma = 0 degrees for square ponds, whereas the rectangular ponds should have been constructed at gamma = 90 degrees to achieve the maximum temperature and shadow effect reduction. The results provided a strong perspective for determining the dimensions and angular placement of the solar ponds before construction of a solar pond.
机译：在这项研究中，结合数值和实验研究了各种形状的小型太阳池的热行为。为此，研究了具有方形和圆形横截面且体积相似的两个太阳能水池的原型。在小型太阳能水池中，侧壁的阴影会影响太阳能热能的积累和存储。因此，为了评估阴影形状和尺寸对池塘性能的影响，提出了一个太阳池温度分布模型，并考虑了阴影效应研究了池塘的热行为。数值计算了存储区中的温度变化，并与实验结果进行了比较。根据结果​​，考虑阴影效应，圆形和方形池塘的最高温度分别为66.8摄氏度和65.8摄氏度。而且，已经研究了池塘的成角度放置对各种地理方向的影响。对于方形池塘，在放置角gamma = 0度时获得了最高温度，而应该在gamma = 90度的情况下构建矩形池，以实现最大温度降低和阴影效果降低。结果为在建造太阳能池之前确定太阳能池的尺寸和角度布置提供了强有力的前景。

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