反算管道传热系数影响因素的敏感性分析

采用系统单因素敏感性分析方法,结合苏霍夫温降公式和现场测试数据,对反算管道传热系数K的进出站温度、管道周围介质温度、含水率和输量,五个因素进行敏感性分析。研究表明:进出站温度对反算管道总传热系数的影响最敏感,其次为含水率和输量,管道周围介质温度最不敏感;因此应尽量减小现场采集进出站温度、含水率和输量的误差,以提高K反算的精度。

Sensitivity analysis of influencing factors on heat transfer coefficient calculation

By using the method of single factor sensitivity analysis of system, this paper develops the sensitivity analysis about the inlet and outlet temperature, temperature in soil around a buried pipeline, water ratio and throughput in the calculation of pipe heat transfer coefficient, with the Sukhoi temperature drop formula and field test data. The conclusion is that: in the calculation of pipe heat transfer coefficient, the inlet and outlet temperature is the most sensitive factor, water ratio and throughput is the less sensitive factor, temperature in soil around a buried pipeline is the least sensitive factor, so in order to improve the degree of accuracy in the calculation of pipe heat transfer coefficient, we should try to reduce the error of the inlet and outlet temperature, water ratio and throughput in the testing.