地源热泵地埋管随机传热灵敏度分析

It exists many random factors in buried pipe of ground source heat system. Based on FSI model for buried pipe of ground source heat pump, it selected random variables in the uniform distribution form system parameters, used the Monte-Carlo stochastic finite element method, analyses the distribution of outlet temperature and the sensitivity for each parameters. The results show that heat transfer and outlet temperature is the most sensitive to inlet temperature, in turns it is soil temperature, internal velocity, thermal properties of the soil, depth and effective radius of U-shaped tube, and obtain the curve of outlet temperature and heat transfer to each parameters.