Ground-source heat pumps (GSHP) systems have been used in residential and commercial buildings due to its high energy-efficiency and environmental friendliness. Applying heat pipes in GSHP systems can potentially increase the temperature difference between the geothermal source and the evaporation section of GSHP and reduce the energy consumption of circulation pumps. This paper provides a brief overview of the ground-source heat pump systems with heat pipes (HP-GSHP) and their recent advances. First, the operating process and principles of GSHP and heat pipes are introduced. Some research focus on the design and transformation of the ground heat exchanger are also presented. Finally, the influence of different parameters on geothermal heat pipe's performance is described in detail and it was disclosed that the HP-GSHP systems have a better performance than other conventional GSHP systems for energy efficiency in buildings.
Wu, S., Dai, Y., Li, X., Oppong, F., & Xu, C. (2018). A review of ground-source heat pump systems with heat pipes for energy efficiency in buildings. In Energy Procedia (Vol. 152, pp. 413–418). Elsevier Ltd. https://doi.org/10.1016/j.egypro.2018.09.167