求翻译：本文根据计算结果,对分离式热管换热器总结各个计算过程中的变量，发现外管径，冷热段长度，烟气流速，横向间距和流程数这5个变量是影响热管空气预热器设计的主要参数。然后进行热力学分析，可以得出逆流换热器火用效率ηe随传热单元数n和冷热流体热容量比R的变化规律。是什么意思？

According to the results of the separate type heat pipe heat exchanger summary of the variables in each calculation, found that the outer diameter, hot and cold length of the flue gas velocity, the horizontal spacing and the number of processes of these five variables that affect the heat pipe air p

This article the results of the calculations, and the detachable heat pipe heat exchanger Summary in the calculation process, and found that the variable diameter, length, hot and cold air, smoke-free as soon as possible, the lateral spacing and flow of the 5 variables that affect heat pipe air preh

This article according to the computed result, summarizes in each computation process variable to the separation formula heat pipe heat interchanger, outside discovered the caliber, the cold hot leg length, the haze speed of flow, the crosswise spacing and flow number these 5 variables affect the ma

This article according to the calculation results, summary of separate type heat pipe heat exchanger calculation variables in the process, found external pipe diameter, length of hot and cold, gas flow rate, horizontal spacing and the number of processes the 5 variables are main parameters influenci

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