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结合顺、逆流换热器，对温差场的均匀程度进行了研究．提出了传热效能与温差场不均匀因子之间的关联式，该式的计算结果与有关文献数值计算的结果符合较好．在相同传热单元数和热容量流比的情况下，换热器的温差场越均匀，其传热效能越高，验证了温差场均匀性原则的正确性．
Combined with cis and countercurrent heat exchangers, the temperature uniformity of the field was studied. The correlation between the heat transfer efficiency and the temperature field nonuniformity factor is put forward. The calculation result of the formula is in good agreement with the numerical calculation of the literature. Under the condition of the same number of heat transfer units and the heat capacity flow rate, the more uniform the temperature difference field of the heat exchanger, the higher the heat transfer efficiency, which verifies the correctness of the principle of temperature field uniformity.