Review of solar-assisted ground source heat pump system

In recent years, as a new kind of heat pump combination form in renewable energy field, solar-assisted ground source heat pump system has been widely applied. The present research situation was obtained by summarizing the literatures about the system used in construction, greenhouse and biogas engineering. Especially for medium and large scale biogas engineering, the paper compared and analyzed the application of the system in microbial adaptability, heat load, economic and environmental benefits, then pointed out its prospect.