本文对“干燥器热效率”的定义方法进行了讨论,指出了现用定义的不足。为了使不同的干燥器在不同的气候条件下干燥不同物料时的效率值具有可比性,作者初步引入两个限制条件:第一,被干燥物料的初始含水量应根据环境条件决定。第二,把效率与干燥器的最低工作温度T′_t和环境温度T_α之差(T′_t-T_α)相联系。 This article discusses the definition of “dryer thermal efficiency” and points out the shortcomings of the current definition. In order to make different dryers in different climatic conditions drying efficiency of different materials are comparable, the author initially introduced two constraints: First, the initial moisture content of the material to be dried should be based on environmental conditions. Second, the efficiency is related to the difference (T’_t-T_α) between the minimum operating temperature T’_t of the dryer and the ambient temperature T_α.