In some literatures concrete temperature is calculated by converting its heat insulating layer into an air heat exchange coefficient.
有的文献把保温层折算为对空气的热交换系数来计算混凝土的温度。
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This paper introduces the basic concepts of insulating glass unit U values(heat transfer coefficient)and in GB/T22476 standard the basic conditions&mathods for calcuting glass unit U values.
The utility model is not only heat-resistant, with high insulating strength and low heat conductivity coefficient, but also easy to machine, and can be widely used on electric heating apparatuses.