Schincariol Robert A, Raymond Jasmin
Institut national de la recherche scientifique, 490 Couronne Street, Quebec City, Quebec, Canada, G1K 9A9.
Ground Water. 2023 Mar;61(2):163-170. doi: 10.1111/gwat.13100. Epub 2021 Apr 6.
Hydrogeologists and mechanical engineers approach the design of geoexchange systems, and the associated borehole heat exchanger (BHE) fields, in different ways, each focusing on their knowledge areas. While these differences have created a strong research base, with well-published innovations and designs that collectively allow for sustainable systems, industry has not embraced these recent advancements. Despite abundant research demonstrating how complex shallow groundwater flow and temperature conditions can influence BHE design and operation, the low-temperature geothermal industry remains largely fixed on simple analytical codes and assumed uniform ground conditions. Geoexchange system inefficiencies become masked via reduced heat pump performance and increased electricity consumption. Similarly, interactions between BHE fields and infrastructure in urban areas are slow to manifest and are often unrealized due to a lack of field temperature data. While regulations that include hydrogeological factors have been developed in some jurisdictions, they are largely voluntary or rudimentary and can be unapplied in industry. Addressing this application gap may be unreasonable as designing and installing thermally efficient geoexchange systems can put them out of the cost envelope of competing heating and cooling systems. Perhaps for hydrogeologists, the way forward lies in the use of BHE's to facilitate contaminated sites remediation, an area we are familiar with, and one that allows for innovative technologies to reduce cost envelopes. Following that path, hydrogeologists can help improve system efficiencies while fully considering the dynamic nature of advective and thermal transport by groundwater.
水文地质学家和机械工程师在设计地源热泵系统及相关钻孔热交换器（BHE）场地时采用不同方法，各自专注于自己的知识领域。虽然这些差异形成了强大的研究基础，有大量已发表的创新成果和设计，共同促成了可持续系统，但行业尚未接受这些最新进展。尽管大量研究表明浅层地下水流动和温度条件的复杂性会如何影响BHE的设计和运行，但低温地热行业在很大程度上仍依赖简单的分析代码，并假定地面条件均匀。地源热泵系统的低效率通过热泵性能下降和电力消耗增加而被掩盖。同样，城市地区BHE场地与基础设施之间的相互作用显现缓慢，且由于缺乏现场温度数据，往往未被认识到。虽然一些司法管辖区已经制定了包含水文地质因素的法规，但这些法规大多是自愿性的或基本的，在行业中可能无法应用。解决这一应用差距可能不合理，因为设计和安装热效率高的地源热泵系统可能会使其超出竞争性供热和制冷系统的成本范围。也许对水文地质学家来说，前进的方向在于利用BHE促进污染场地的修复，这是我们熟悉的领域，并且允许采用创新技术来降低成本范围。沿着这条道路，水文地质学家可以在充分考虑地下水平流和热传输的动态特性的同时，帮助提高系统效率。
