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利用热交换器内固体温度分布特征值σ２ 的数学表达式和固体温度前沿扩展的分析得出的蓄热式热交换器效率的计算式，讨论了影响该热交换器效率的若干因素及定量关系，为蓄热式热交换器热工行为的进一步研究、优化设计方法的建立，以及现有蓄热式热交换器热工行为的评价，提供了理论依据。
Based on the mathematical expression of the characteristic value σ2 of the temperature distribution of the solid in the heat exchanger and the calculation formula of regenerative heat exchanger efficiency based on the frontal expansion of the solid temperature, several factors influencing the heat exchanger efficiency and the quantitative relationship , Which provides a theoretical basis for the further study of the thermal behavior of regenerative heat exchanger, the establishment of optimal design method and the evaluation of the thermal behavior of existing regenerative heat exchangers.