闭环地源热泵（GSHPs）设计过程中的一个关键需求是准确了解土壤/岩层的热特性。通过在现场安装地面热交换器并施加热负荷，可以在现场估算这些特性。最近的发展提高了根据由此产生的温度变化预测热性能的能力。另一个好处是，在安装测试换热器期间确定的钻井条件将提高承包商估算项目成本的能力。本文讨论了热性能测定现场试验开发中的几个问题和程序。本文还讨论了热性能测量误差对地下换热器设计、回路工作温度、设备容量和系统效率的影响。 一个经过评估的设计方案（Thorton等人，1997年）被用于预测100吨（351千瓦）办公楼的结果。导热系数和扩散率的10%变化导致设计长度的误差为4.5%至5.8%，冷却能力的变化为1%，回路温度的变化为+2°F（1°C），加热能力的变化为0.7%，冷却EER的变化为2%，加热COP的变化为零。单位:双引文:研讨会，ASHRAE交易，第106卷，pt。1.

A critical need in the design procedure of closed-loop, ground-source heat pumps (GSHPs) is an accurate knowledge of the thermal properties of soil/rock formations. These properties can be estimated in the field by installing and imposing a thermal load on a ground heat exchanger at the site. Recent developments have improved the capability of predicting thermal properties from the resulting temperature change. An additional benefit is that drilling conditions, determined during the installation of the test heat exchanger, will improve the capability of contractors to estimate project costs. This paper discusses several of the issues and procedures in the development of field tests for thermal property determination. It also addresses the impact of thermal property measurement error upon the resulting ground heat exchanger design, loop operating temperatures, equipment capacity, and system efficiency. A design program that has been evaluated (Thorton et al. 1997) was used to predict results for a 100-ton (351 kW) office building. A 10% variation in thermal conductivity and diffusivity resulted in a 4.5% to 5.8% error in design length, a 1% change in cooling capacity, a +2°F (1°C) variation in loop temperature, a 0.7% change in heating capacity, a 2% variation in cooling EER, and no change in heating COP.Units: Dual