【摘 要】
：
电热元件的表面温度无论对于厂方还是用户都是一个重要的数据。过去,我们是通过仪表测量得到的,但是这种实验的方法精度差,而且在没有仪表或是新产品设计时显得束手无策。在
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电热元件的表面温度无论对于厂方还是用户都是一个重要的数据。过去,我们是通过仪表测量得到的,但是这种实验的方法精度差,而且在没有仪表或是新产品设计时显得束手无策。在周围环境一定的条件下,管状电热元件(以下简称元件)的表面温度一般取决于元件单位表面积上的电功率的大小,即表面负荷W。下面以水平处在静止空气中,直径为0.12m的钢管为例来推导表面温度与表面负荷的关系。表面负荷的定义为
The surface temperature of the heating element is an important data for both the factory and the user. In the past, we measured it with instruments, but the method of this experiment was poorly-characterized and was useless without meter or new product design. Under certain conditions of the surrounding environment, the surface temperature of the tubular heating element (hereinafter referred to as the element) generally depends on the magnitude of the electric power on the unit surface area of the element, that is, the surface load W. FIG. Below the level in still air, the diameter of 0.12m steel pipe as an example to derive surface temperature and surface load relationship. Surface load is defined as
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