A numerical study on performance efficiency of a low-temperature horizontal ground-source heat pump system

Exploitation of shallow ground and its low-grade heat potential is fundamental to designing 5th generation district heating cooling (DHC) networks. Horizontal ground-source pump (HGSHP) systems are a common way utilize geothermal energy. Realistic estimation prediction performance HGSHP system thermal behaviour should consider the whole including building load, exchanger, ground. This be accompanied by realistic atmospheric conditions. In this paper, three-dimensional coupled thermal–hydraulic model with boundary conditions adopting approach presented. Dynamic coefficient (COP) that depends on seasonal variation heating/cooling demand also considered. Model validations conducted against experimental analytical results in literatures. The applied for evaluating support development DHC network site UK. Several influencing factors, such as moisture transfer, load mode, buried depth loops, initial temperature profile studied assess efficiency evolution response extraction or rejection into show 5% monthly total could met designed system, consisting 200 U-shaped loops at 3 m pure water carrier. Overlooking transfer hyperbolizing saturation would overestimate load-carrying capacity system. more efficient higher COP under mode than heating-only mode. Predicted improves loops. 1 ℃ increase undisturbed suffice up 8% site.