之前对住宅地热热泵垂直地下换热器设计方法的比较发现，五个商用计算机程序推荐的尺寸存在很大差异，即使五个程序都输入了一致的信息。这项工作的目的是使用最初测试的五个程序的更新版本，以及之前比较中未包括的一个新程序，重复比较。两个地点的模拟模型——一个在以冷却为主的气候中，另一个在以加热为主的气候中——根据现场收集的数据进行校准，然后用典型的气象年数据驱动，为六个设计方案产生一致的输入。 结果表明，这些程序现在更加一致。对于以冷却为主的场地，设计长度的变化约为7%，而对于以加热为主的场地，设计长度的变化约为16%。与1996年进行的测试相比，现在各种设计算法之间有了更多的一致性。单位:I-PCITION:研讨会，ASHRAE交易，第105卷，pt。1999年2月2日，西雅图

A previous comparison of vertical ground heat exchanger design methods for geothermal heat pumps in residential applications found large disagreements in the sizes recommended by five commercially-available computer programs, even when consistent information was input to all five. The objective of this work is to repeat the comparison using updated versions of the five programs originally tested, and one new program which was not included in the previous comparison. Simulation models of two sites--one in a cooling dominated climate, and the other in a heating dominated climate--were calibrated to site-collected data and then driven with typical meteorological year data to produce consistent inputs for the six design programs. The results indicate that the programs are now much more consistent with one another. For the cooling dominated site, design lengths vary by about 7%, and for the heating dominated site the design lengths vary by 16%. Compared to the tests performed in 1996, there is now much more consistency among the various design algorithms.Units: I-P