Research on stochastic characteristic of ground heat exchanger of ground source heat pumps with Monte-Carlo method

摘要

There are many stochastic factors in heat transfer of ground heat exchanger of ground source heat pumps (GSHP). In order to study of stochastic characteristic of ground heat exchanger under these stochastic parameters in heat transfer process, a stochastic model is applied for heat transfer of ground heat exchanger in this paper, some stochastic parameters (such as inlet temperature, soil-rock temperature, soil-rock density, etc) are chosen and assumed that its satisfy uniform distributions. The outlet temperature and its sensitivity to some parameters are analyzed with Monte-Carlo stochastic finite element method. The result shows that the outlet temperature of ground heat exchanger is more sensitive to inlet temperature, soil-rock temperature, velocity of fluid in exchanger, thermal properties of soil-rock.