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在对太阳能Kalina循环机理研究的基础上,针对对流换热边界条件,建立单管太阳能热水器对流换热过程的数学模型,并对该模型进行了通过实验验证,实验采用φ47×1500和φ58×1800两种真空管,分析了各种因素对对流换热效果的影响。结果表明:该数学模型能够较好地解释单管太阳能热水器对流换热过程;安装角度、管径和管长、水箱直径,是否加装导流板和反光板均对对流换热过程有不同程度的影响。通过对单管太阳能热水器的场协同性可视化分析,确定加装反光板和导流板的φ58×1800真空管为首选。
Based on the research of solar energy Kalina cycle mechanism, a mathematical model of convection heat transfer process of single tube solar water heater was set up for the convective heat transfer boundary conditions. The model was verified by experiments. The experiment adopted φ47 × 1500 and φ58 × 1800 Two types of vacuum tubes were used to analyze the influence of various factors on convective heat transfer. The results show that the mathematical model can well explain the convective heat transfer process of single-tube solar water heater. The installation angle, pipe diameter and pipe length, water tank diameter, whether the deflector and reflector are installed have different degrees of convection heat transfer process Impact. Through the visual analysis of field synergy of single-tube solar water heater, the φ58 × 1800 vacuum tube with reflector and baffle is selected as the first choice.