铁路隔热保温车综合传热系数计算及试验研究

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中图分类号：U272.5 文献标志码：B doi：10.20214/j.cnki.zhgdjt.2025.05.003

Study on Calculation and Test of Comprehensive Heat Transfer Coefficient of Railway Isothermal Car

[E Yuanxin1，³，HE Jie²，MAO Yong³，XIE Bin ³，JING Chuanfeng³，XU Weiguo²，GAO Jianhua’ （College of Energy Engineering，Zhejiang University，Hangzhou 3loo58，China； 2.China State Railway Group Co.，Ltd.，Beijingloo844，China； 3.Refrigerated Transport Equipment Institute of CRRC Yangtze Co.，Ltd.，Wuhan 430212，China）

Abstract：The comprehensive heat transfer coefficient is an important indicator to measure the thermal insulation performance of cars.To solve the problem of great deviation between the theoretical calculation value and the test valueofcomprehensive heat transfer coeficientof therailway isothermalcar，the theoretical calculation and the simulation calculation have been carred out and the results have been compared with the testdata.The non-thermal stability test has shown that the comprehensive heat transfer coeficient of the whole car is 0.1780W/（Ωm2Ω⋅K） while the theoretical calculation result is 0.1439W/（m2⋅K） ，witha deviation up to 19.16% compared to the test data. The comprehensive heat transfer coefficient of the whole car obtained from simulation calculation is 0.1682W/（m2⋅K） ，with a deviation of 5.51% compared to the test data.The data comparison demonstrates that the simulation canreproduce the heat transfer process of complexstructures more accurately.Based on the simulation analysis and the test result，fullyconsidering the impactof the complex internal structure of railway isothermal car on the heat transfer coefficient，the article revises the original theoretical calculation modeland proposes a structural heat transfer coefficient which can be usedtorevise thetheoreticalcalculation modelof thecomprehensive heat transfer coefficientof thewhole car andprovideanimportant reference for thecalculation of comprehensive heat transfercoeficient of cars with similar structures.

Keywords：railway isothermal car；comprehensive heat transfer coeficient；theoretical calculation; imulation；test

我国冷链物流需求量巨大，适合中远距离铁路运输的冷链物流量占需求量 20% 以上，而铁路冷链运输量在我国冷链运输市场需求量占比极低。（剩余7182字）