The Value of Heat and Geothermal Waters

IF 1.3 4区 工程技术 Q3 ENGINEERING, GEOLOGICAL
D. Banks
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引用次数: 1

Abstract

Evaluation of proposed geothermal projects often requires a value to be assigned to waterborne geothermal heat or geothermal fluids. A methodology for valuing low enthalpy warm fluids (<90°C) is presented: the method uses a reference price for sale of waterborne district heating at a relatively high temperature (in this paper, we have assumed 70°C), and then discounts this price by the value of electricity that must be expended in a heat pump compressor to transfer heat from the source fluid to the target reference level. An alternative methodology is also presented, based on the exergy content of the geothermal fluid: this is arguably more theoretically justifiable but does not account for the real costs of running a heat pump. Compared with other sources of low carbon environmental heat, prospecting for deeper warm geothermal fluids will be favoured when drilling costs are low and electricity prices are high; shallow cooler fluids, coupled with the use of heat pumps, are economically favourable when electricity is cheap and drilling costs are high.
热与地热水的价值
评价拟议的地热项目往往需要对水性地热或地热流体赋值。提出了一种评估低焓热流体(<90°C)的方法:该方法使用在相对较高温度(在本文中,我们假设70°C)下销售的水基区域供热的参考价格,然后通过热泵压缩机将热量从源流体传递到目标参考水平必须消耗的电力价值来折扣该价格。另一种方法也提出了,基于地热流体的能量含量:这可以说是理论上更合理的,但没有考虑到运行热泵的实际成本。与其他低碳环境热源相比,钻探成本低、电价高的深层地热流体有利于勘探;在电力便宜、钻井成本高的情况下,浅层较冷的流体加上热泵的使用在经济上是有利的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
3.40
自引率
14.30%
发文量
66
审稿时长
6 months
期刊介绍: Quarterly Journal of Engineering Geology and Hydrogeology is owned by the Geological Society of London and published by the Geological Society Publishing House. Quarterly Journal of Engineering Geology & Hydrogeology (QJEGH) is an established peer reviewed international journal featuring papers on geology as applied to civil engineering mining practice and water resources. Papers are invited from, and about, all areas of the world on engineering geology and hydrogeology topics. This includes but is not limited to: applied geophysics, engineering geomorphology, environmental geology, hydrogeology, groundwater quality, ground source heat, contaminated land, waste management, land use planning, geotechnics, rock mechanics, geomaterials and geological hazards. The journal publishes the prestigious Glossop and Ineson lectures, research papers, case studies, review articles, technical notes, photographic features, thematic sets, discussion papers, editorial opinion and book reviews.
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