内置百叶中空玻璃数值模拟及实验研究

Numerical Simulation and Experimental Study on Insulating Glass with Built-in Louver

普通中空玻璃内加装内置百叶会影响两侧玻璃之间的自然对流换热。本文通过实验测量和数值模拟研究了在一定温差条件下,内置百叶中空玻璃和无百叶中空玻璃系统的热工性能,通过改变空腔间距和百叶倾角来研究其对中空玻璃系统的传热系数的影响情况。研究结果表明,为使百叶起到较好的隔热效果,内置百叶的中空玻璃空腔间距应大于40 mm;百叶倾角为90°时的总传热系数U值最低;内置百叶可使普通中空玻璃的热阻值提高6%~30%。

The addition of built-in louvers in ordinary insulating glass will affect the natural convective heat transfer between the two sides of the glass.In this paper,the thermal per-formance of the built-in louvered insulating glass system and the non-louvered insulating glass system under certain temperature difference conditions are studied by experimental measurement and numerical simulation,and the influence of the cavity spacing and louver inclination on the heat transfer coefficient of the insulating glass system is studied by chan-ging the cavity spacing and louver inclination.The results show that in order to make the louver have a better thermal insulation effect,the cavity spacing of the hollow glass with built-in louver should be greater than 40 mm.When the louver inclination angle is 90°,the total heat transfer coefficient U value is the lowest.The built-in louver can increase the total heat transfer coefficient U value of ordinary insulating glass by 6%-30%.