Direct comparison between horizontal and vertical ground-loop systems for a ground source heat pump system

土壤源热泵系统由于其高效性而成为一种极具吸引力的建筑冷热源替代系统。地源热泵系统是利用土壤作为热源或散热器，通过设置土壤回路进行换热。有两种接地回路配置，即：水平和垂直。每种配置都有优点和缺点。水平接地回路水平地埋在沟槽中，通常深约2米，其安装成本通常较低。根据所需的地面环路长度，所需的土地面积可能很大;因此，这种配置可能不适用于城市环境。然而，垂直地面回路垂直安装在钻孔中，通常长达75米至200米，其安装成本通常较高。垂直井眼油田通常比水平沟油田占用更少的土地面积。尽管如此，当土地面积不是一个问题，如在郊区和农村地区，这两种配置都可以使用。在公开文献中，有许多关于每种接地回路配置的研究。但是没有一个建筑物同时研究了同一个热泵的两种地面环路配置。

The ground source heat pump (GSHP) system is an attractive alternative heating and cooling system for buildings, because of its high efficiency. For a ground source heat pump system, which utilizes the ground as the heat source or sink, a ground loop is installed to exchange heat. There are two ground loop configurations, namely: horizontal and vertical. There are pros and cons for each configuration. The horizontal ground loops are buried horizontally in trenches, usually down to about 2-m depth, and their installation costs are usually lower. Depending on the required ground-loop length, the required land area can be large; therefore, this configuration may not be applicable to urban environment. However, the vertical ground loops are installed vertically in boreholes, usually up to 75 m to 200 m in length, and their installation costs are usually higher. The vertical borehole fields usually occupy less land areas than the horizontal trench fields. Nonetheless, when land area is not a concern, as in suburban and country-side regions, both configurations can be used. There are a number of studies on each ground-loop configuration separately in the open literature. But none has both ground-loop configurations studied simultaneously with the same heat pump for a building.