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螺旋盘管腔式吸热器在塔式和碟式太阳能热利用中都有广泛的应用。聚集热流的非均匀性导致吸热器内产生温度梯度,从而在管内产生热应力,导致吸热管变形,而当温度梯度足够大时,热应力会导致吸热管破坏,严重影响吸热器的寿命。本文以四种气体工质为传热介质,基于CFD分析得到气体在吸热器中的管内流动情况及管壁的温度场分布,再将管壁得到的温度场直接加载到热应力分析模型中得到螺旋管的热应力分布。
Spiral coil heat sink in tower and dish solar heat have a wide range of applications. The nonuniformity of the accumulated heat flow causes a temperature gradient in the heat absorber to generate thermal stress in the pipe and cause deformation of the heat absorbing pipe. When the temperature gradient is large enough, the thermal stress causes the heat absorbing pipe to be damaged, which seriously affects the heat sink Life expectancy In this paper, four kinds of gas refrigerant are used as heat transfer medium. Based on the CFD analysis, the gas flow inside the tube in the heat absorber and the temperature field distribution are obtained. The temperature field obtained from the tube wall is directly loaded into the thermal stress analysis model Get the coil thermal stress distribution.