基于多级模糊综合评估模型的翅片管换热器热阻分析

Thermal Resistance Analysis of Fin-tube Exchanger Based on Multiple-level Comprehensive Fuzzy Evaluation Model

空气源热泵机组翅片管换热器的热阻对换热效果的影响很大。以模糊理论为依据,运用模糊数学的多级综合评判工具建立数学模型,开发空气源热泵机组翅片管换热器热阻的模糊综合评估专用软件,对其影响因素与影响效果之间的关系进行分析。结果表明:权重值越大的影响因素,其因素等级的变化所引起的换热效果的变化越大;同时改善多个大权重值影响因素带来的综合影响效果更为突出。根据分析结果提出了多项综合降低热阻的措施。

Thermal resistance of the fin-tube exchanger is an important factor to the heat transfer ef fect of an air-source heat pump. Based on the fuzzy theory ,m u l t ip le - le v e l c om p re h e n s iv e e v a lu a t io n m e th o d o f fuzzy mathematics was applied to establish the mathematical model and develop a dedicated software forcomprehensive fuzzy evaluation of thermal resistance of fin-tube exchanger. The relation between the factors and the results was analyzed. The results show that for the rnfluencing factors with greater weight value,the changes of heat transfer effect caused by the change of factor level are larger; th e c om p re h e n s iv e influence resulting from improvement of multiple influencing factors with large weight value is moreprominent. Multiple comprehensive measures to reduce the thermal resistance are proposethe analysis results.