Ground source heat pump (GSHP) systems can provide cost effective and sustainable heating and cooling for buildings while using considerably less fossil fuel than conventional heating and cooling systems. This benefit can be further enhanced by adopting hybrid GSHP (HGSHP) systems wherein the GSHP component provides the baseload thermal energy with the balance provided by conventional systems. This study compares the costs of GSHP and HGSHP systems against conventional systems under a variety of climatic conditions, exemplified by those encountered across Australia, but including conditions encountered elsewhere. The results indicate that the comparative performance of GSHP and HGSHP systems depend on many parameters including climatic conditions, ground conditions, drilling prices and prices of electricity and gas in the regions where the systems are installed. Here we show that in general, adopting GSHP or HGSHP systems over conventional systems allow property owners to pay lower lifetime costs under most climatic conditions and gas to electricity energy price ratios. The results also indicate that conventional systems may be preferred in highly heating or cooling dominant climates and at locations with high drilling costs or low energy prices. In contrast, GSHP and HGSHP systems are preferred in locations with a more balanced climate, lower drilling costs and/or higher energy prices. There is no “one size fits all” rule given the many factors that can influence the lifetime costs. The paper shows that climatic conditions, ground conditions, drilling and energy costs must all be carefully considered when assessing the most cost effective sustainable energy technologies for space heating and cooling.

地源热泵（GSHP）系统可以为建筑物提供具有成本效益的可持续供暖和制冷系统，同时使用的化石燃料比传统的供热和制冷系统要少得多。通过采用混合GSHP（HGSHP）系统，可以进一步增强此优势，其中GSHP组件可提供基本负载热能，并提供常规系统提供的平衡。这项研究将GSHP和HGSHP系统在各种气候条件下与常规系统的成本进行了比较，以澳大利亚为例，但也包括其他地方遇到的条件。结果表明，GSHP和HGSHP系统的比较性能取决于许多参数，包括气候条件，地面条件，系统安装区域的钻井价格以及电力和天然气价格。在这里，我们表明，一般而言，在常规系统上采用GSHP或HGSHP系统可使业主在大多数气候条件下以及天然气与电力的能源价格比方面支付较低的生命周期成本。结果还表明，在高供暖或降温占主导地位的气候以及钻井成本高或能源价格低的位置，常规系统可能是首选。相反，GSHP和HGSHP系统在气候更为平衡，钻井成本较低和/或能源价格较高的地区是首选。鉴于有很多因素可能影响生命周期成本，因此没有“一刀切”的规则。该文件显示气候条件，地面条件，