ISSN Online: 2377-424X
International Heat Transfer Conference 12
The thermal resistance in a borehole of geothermal heat exchangers
摘要
A two-dimensional steady-state model is presented for a borehole in geothermal heat exchangers of
the ground-source heat pump (GSHP) system. The relations between the temperatures and heat fluxes in
composite regions have been discussed. The temperature distribution in the borehole with multiple line sources
is obtained, and then the expression of the thermal resistance between the pipe wall and the borehole wall is
derived. The factors influencing on the borehole thermal resistance are analyzed. In comparison with the
simplified one-dimensional model, the new model provides more accurate and reliable approach for the design
of GSHP systems.