Significance analysis of influencing factors on long-term operating power consumption of deep and medium-buried pipe ground source heat pump systems
WANG Guangtao
LI Yuan
GE Guanjiang
Abstract：Based on Ansys Fluent,a three-dimensional calculation model including the dimensions and geological parameters of the medium-buried pipe heat exchanger is established,and the ground temperature gradient,flow velocity,insulation length of the inner pipe and the thermal conductivity of rock and soil are selected as the influencing factors.Through heat extraction simulation,the significance of each factor is calculated and evaluated by using the range analysis method.The results show that the flow rate has the most significant impact on the long-term operating cost of ground source heat pump systems,followed by the ground temperature gradient.At low flow rates,the power consumption of the water pump can be reduced.In areas with high ground temperature gradients,the coefficient of performance(COP)of the heat pump system can be enhanced.In actual engineering,it is necessary to combine the site selection and operation strategy of buried pipes,give priority to areas with high ground temperature gradients,and adopt low flow rate operation,which is conducive to reducing the long-term operation cost of the system.
Keywords：ground buried pipe heat exchangerorthogonal testground source heat pumpnumerical simulationsignificance analysis
Publication Date：2025-11-30
Online Publishing Date：2025-12-29(First online date of this platform, not the publication date of the document)
Pages：5( 49-53 )