本项目旨在确定南方气候条件下垂直地面耦合热泵的可接受性和运行特性。总结了阿拉巴马州1600英尺（150平方米）住宅安装的制冷和供暖性能（Kavanaugh和Deerman 1989）。该系统于1988年5月安装。这座有30年历史的建筑的热负荷和冷负荷分别为43000（13千瓦）和32000 Btu/h（10千瓦）。水-空气热泵的冷却效率比额定效率低10%，加热效率比额定效率低15%。然而，能源使用和需求大幅减少。根据当地1989年的住宅费率结构，平均每月公用事业费用为83美元，最高为98.15美元（2月），最低为66.65美元（6月）。该系统取代了80000 Btu/h卧式煤气炉和9.6 SEER分体式系统冷却装置（ARI 1987）。每年节省217美元，结果是7美元- 一年的简单回报基于1500美元的附加成本。如果该装置以额定效率运行，每年可节省244美元，简单回收期为6.1年。根据2500美元的系统附加成本，回报期为10.2年。虽然1月份比正常情况温和得多，但8月和9月较为温暖。总的来说，就加热和冷却系统的总负荷而言，测试年和上一个比较年都接近正常。该系统还对需求和每月能源使用具有稳定作用。在公用电网需求高峰期，热泵以中等效率运行。由于使用了热回收装置，在非常炎热和寒冷的日子里，对热水的需求大大减少。虽然成本节约非常好，但通过改进现有的水-空气热泵，还可以额外减少20%到30%。关键词:测试、现场测试、垂直、土壤热泵、热泵、美国、冷却、加热、性能、案例研究、投资回收期、成本、经济性、水-空气热泵、能耗、家用、节能、比较、热负荷、冷负荷、热回收循环: 研讨会论文，马里兰州巴尔的摩，1992年

This project was undertaken to determine the acceptability and operational characteristics of vertical ground-coupled heat pumps in southern climates. Summarises the cooling and heating performance of an installation in a 1,600-ft (150-m2) residence in Alabama (Kavanaugh and Deerman 1989). The system was installed in May 1988. The heating and cooling loads of the 30-year-old structure were 43,000 (13 kW) and 32,000 Btu/h (10 kW) respectively. The water-to-air heat pump operated 10% below rated efficiency in cooling and 15% below efficiency in heating. However, energy use and demand were substantially reduced. Based on the local 1989 residential rate structures, the average monthly utility bill was 83 dollars, with a high of 98.15 dollars (February) and a low of 66.65 dollars (June). The system replaced an 80,000-Btu/h horizontal gas furnace and a 9.6 SEER split-system cooling unit (ARI 1987). Annual savings were 217 dollars, resulting in a seven-year simple payback based on a 1,500 dollars added cost. Had the unit operated at rated efficiency, the savings would be 244 dollars a year with a simple payback of 6.1 years. Payback would be 10.2 years based on 2,500 dollars system added cost. Although the month of January was much milder than normal, August and September were warmer. Overall, both the test year and the preceding comparison year were close to normal in terms of total load placed on the heating and cooling system. The system also has a levelling effect on demand and monthly energy use. The heat pump operated at mid-range efficiency during periods of peak demand on the utility grid. Demand for hot water is substantially reduced on very hot and cold days, since a heat recovery unit was used. While cost savings were very good an additional 20% to 30% reduction is possible with the improved water-to-air heat pumps that are now available.KEYWORDS: testing, site testing, vertical, soil heat pumps, heat pumps, USA, cooling, heating, performance, case studies, payback period, costs, economics, water air heat pumps, energy consumption, domestic, energy conservation, comparing, heat load, cooling load, heat recovery