测定新型铁路保温车传热系数的研究
Study on Measurement of Heat Transfer Coefficient of New Type of Railway Insulated Car
魏有涛 1刘忠庆 1孙德世 1高成林 1李玉杰 1吴健1
作者信息
- 1. 中车青岛四方车辆研究所有限公司,山东 青岛 266031
- 折叠
摘要
隔热性能是保温车热工性能的重要指标之一,传热系数是作为衡量隔热性能的主要参数.为准确测定保温车的隔热性能,文章介绍了热稳定法和非热稳定法2种测定传热系数K值的试验方法.对某新型铁路保温车采用热稳定法和非热稳定法进行了K值对比试验研究,采用热稳定法测定新型铁路保温车的K值为0.193 4 W/(m2·K),试验室内采用非热稳定法测定K值为0.193 2 W/(m2·K),与热稳定法测定的K值相比,相对误差为0.10%;厂房内采用非热稳定法测定K值为0.204 1 W/(m2·K),与热稳定法测定的K值相比,相对误差为5.53%.因此与热稳定法相比,采用非热稳定法在恒温试验室条件下也可得到相对准确的测试结果.通过不同的试验方法测定了新型保温车的K值,为我国新型铁路保温车今后的发展提供了参考.
Abstract
The insulation performance is one of the important indices of thermal performance of the insulated car and the heat transfer coefficient is a main parameter to measure the insulation performance.To accurately measure the insulation performance of the insulated car,the article introduces two methods to measure the heat transfer coefficient K value which are the thermal stability method and the non-thermal stability method.A certain new type of railway insulated car has been studied by K value contrast test with the thermal stability method and the non-thermal stability method:the K value of the new railway insulated car measured with the thermal stability method is 0.193 4 W/(m2·K),the K value measured in laboratory with the non-thermal stability method is 0.193 2 W/(m2·K),with a relative error of 0.10%compared with the K value with the thermal stability method;the K value measured in workshop with the non-thermal stability method is 0.204 1 W/(m2·K),with a relative error of 5.53%compared with the K value with the thermal stability method.Therefore,compared with the thermal stability method,a relatively accurate test result can be obtained in a laboratory with constant temperature with the mon-thermal stability method.The K value of the new type of insulated car has been measured with different test methods,providing a reference for the future development of the new types of railway insulated cars of China.
关键词
保温车/热稳定法/非热稳定法/K值/传热系数Key words
insulated car/thermal stability method/non-thermal stability method/K value/heat transfer coefficient引用本文复制引用
出版年
2024
NETL
NSTL
万方数据