rOGER: A method for determining the geothermal potential in urban areas

IF 3.5 2区工程技术 Q3 ENERGY & FUELS

Geothermics Pub Date : 2024-08-28 DOI:10.1016/j.geothermics.2024.103148

Matteo Baralis, Marco Barla

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引用次数: 0

Abstract

Shallow geothermal energy is increasingly adopted for heating and cooling purposes because of the short pay-back time of initial installation investments. As a result, a relevant concentration of Ground Heat Exchangers is being experienced in urban areas. Planning issues thus arise to manage interferences and optimize the use of underground heat resources without depletion, harm to the environment nor efficiency losses on heat pumps or plant oversizing. This study provides a rational approach to optimise geothermal resources based on the use of Geographic Information Systems and transient 3D Thermo-Hydro numerical models. An optimised semi-analytical formula for the assessment of Borehole Heat Exchangers geothermal potential in hydrodynamic conditions is developed through a parametric numerical study. The long-term performances of BHE subjected to groundwater velocity in the range of 0 to 1 m/day were analysed with multiple aquifer thermal parameters. This analytical expression allows a fast and accurate assessment of the potential even in large areas without leading to excessively conservative evaluations. This may serve designers in the preliminary sizing of installations and city planners in the development of appropriate policies for the promotion and management of shallow geothermal resources. An example of the application to the central district of the city of Turin (Italy) is also shown.

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rOGER：确定城市地区地热潜力的方法

由于初始安装投资回收期短，浅层地热能越来越多地被用于供暖和制冷目的。因此，地热交换器越来越多地集中在城市地区。因此，规划问题就出现了，如何在不损耗地下热能资源、不损害环境、不造成热泵效率损失或设备过大的情况下，管理干扰和优化利用地下热能资源。本研究基于地理信息系统和瞬态三维 Thermo-Hydro 数值模型，提供了一种优化地热资源的合理方法。通过参数化数值研究，开发了一种优化的半解析公式，用于评估孔式热交换器在水动力条件下的地热潜力。利用多个含水层热参数分析了地下水流速在 0 至 1 米/天范围内的钻孔换热器的长期性能。这种分析表达式可以快速、准确地评估潜力，即使在大面积区域也不会导致过于保守的评估。这可以帮助设计人员初步确定设备的规模，也可以帮助城市规划者制定适当的政策来促进和管理浅层地热资源。图中还展示了应用于都灵市（意大利）中心区的实例。

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

Geothermics 工程技术-地球科学综合

CiteScore

7.70

自引率

15.40%

发文量

237

审稿时长

4.5 months

期刊介绍： Geothermics is an international journal devoted to the research and development of geothermal energy. The International Board of Editors of Geothermics, which comprises specialists in the various aspects of geothermal resources, exploration and development, guarantees the balanced, comprehensive view of scientific and technological developments in this promising energy field. It promulgates the state of the art and science of geothermal energy, its exploration and exploitation through a regular exchange of information from all parts of the world. The journal publishes articles dealing with the theory, exploration techniques and all aspects of the utilization of geothermal resources. Geothermics serves as the scientific house, or exchange medium, through which the growing community of geothermal specialists can provide and receive information.