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基于太阳能真空集热管结构,应用传热学模型、气象参数模型以及流体工质物理模型分析其传热特性,并在此基础上归纳方程,得到真空集热管的吸热管温度、热损失以及被加热流体工质温度等与室外气象条件的关系。最后,利用该方程模拟真空集热管在冬季白天气象条件下的动态响应特征,并给出模拟结果。结果表明:吸热管温度与室外温度关联度小;热损失在较高辐照度时较大,呈“瘦高”型;同时,对热损失以及玻璃管外壁温度进行试验验证。试验表明:吸热管温度在320℃以下,模拟结果与试验符合较好。
Based on the structure of the solar vacuum tube, the heat transfer characteristics were analyzed by applying the heat transfer model, the meteorological parameter model and the physical model of the fluid working fluid. On the basis of this, the heat pipe temperature and heat loss of the vacuum tube were obtained, The relationship between the temperature of heating fluid and other outdoor weather conditions. Finally, this equation is used to simulate the dynamic response characteristics of the vacuum tube in meteorological conditions during the daytime in winter, and the simulation results are given. The results show that the correlation between the temperature of the heat absorption pipe and the outdoor temperature is small; the heat loss is larger at the higher irradiation degree and is “lean”; at the same time, the heat loss and the temperature of the outer wall of the glass pipe are verified. The experiment shows that the temperature of the heat absorption pipe is below 320 ℃, and the simulation result is in good agreement with the test.