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采用三维数值模拟方法研究了太阳能吸热器在有风环境下的混合对流热损失特性,得到了吸热器腔体内部的温度分布和采光口截面的速度分布以及对流热损失大小与倾角、风向的关系曲线。结果表明,与无风环境下太阳能吸热器对流热损失随倾角增加而单调减小的规律不同,有风环境下,太阳能吸热器混合对流热损失同时受到环境风和倾角的共同影响,且规律较为复杂。当风向背对采光口时,吸热器混合对流热损失在不同倾角下随风向的变化较小,但当风向正对采光口时,吸热器混合对流热损失随风向的变化较为剧烈,受到倾角的影响也较为显著。
The three-dimensional numerical simulation method was used to study the heat convection loss characteristics of a solar heat absorber under windy conditions. The temperature distribution inside the heat absorber cavity and the velocity distribution of the cross section of the light inlet were obtained, and the magnitude and inclination of convection heat loss, The relationship curve. The results show that the heat loss of solar heat sink decreases monotonically with the increase of inclination angle in a non-wind environment. The wind-induced heat loss due to mixed convection of solar heat sink is affected by both the ambient wind and the dip angle The law is more complicated. When the wind direction is opposite to the light port, the heat loss of the mixed convection heat exchanger changes less with the wind direction under different inclinations. However, when the wind direction is directly opposite to the light port, the heat loss of the mixed convection heat exchanger changes more drastically with the wind direction , Affected by the inclination is also more significant.