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Borehole Heat Exchangers—Addressing the Application Gap with Groundwater Science
Ground Water ( IF 2.6 ) Pub Date : 2021-03-27 , DOI: 10.1111/gwat.13100
Robert A Schincariol , Jasmin Raymond 1
Affiliation  

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.

中文翻译:

钻孔换热器——解决与地下水科学的应用差距

水文地质学家和机械工程师以不同的方式处理地质交换系统和相关的钻孔热交换器 (BHE) 领域的设计,每种方式都专注于他们的知识领域。虽然这些差异已经建立了强大的研究基础,并通过广泛发表的创新和设计共同实现了可持续系统,但工业界并未接受这些最近的进步。尽管大量研究表明复杂的浅层地下水流动和温度条件如何影响 BHE 的设计和运行,但低温地热产业在很大程度上仍然停留在简单的分析代码和假设均匀的地面条件上。Geoexchange 系统的低效率通过降低热泵性能和增加电力消耗而被掩盖。相似地,BHE 场与城市地区基础设施之间的相互作用表现缓慢,并且由于缺乏现场温度数据而常常无法实现。虽然在一些司法管辖区已经制定了包括水文地质因素的法规,但它们主要是自愿的或初步的,可能无法在工业中应用。解决这一应用差距可能是不合理的,因为设计和安装热效率高的地热交换系统可以将它们排除在竞争性加热和冷却系统的成本范围之外。也许对于水文地质学家来说,前进的道路在于使用 BHE 来促进受污染场地的修复,这是我们熟悉的一个领域,并且允许创新技术降低成本范围。沿着那条路,
更新日期:2021-03-27
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