Geothermal energy in deep aquifers: A global assessment of the resource base for direct heat utilization - BRGM - Bureau de recherches géologiques et minières Access content directly
Journal Articles Renewable and Sustainable Energy Reviews Year : 2018

Geothermal energy in deep aquifers: A global assessment of the resource base for direct heat utilization

Abstract

In this paper we present results of a global resource assessment for geothermal energy within deep aquifers for direct heat utilization. Greenhouse heating, spatial heating, and spatial cooling are considered in this assessment. We derive subsurface temperatures from geophysical data and apply a volumetric heat-in-place method to improve current global geothermal resource base estimates for direct heat applications. The amount of thermal energy stored within aquifers depends on the Earth's heat flow, aquifer volume, and thermal properties. We assess the thermal energy available by estimating subsurface temperatures up to a depth of three kilometer depending on aquifer thickness. The distribution of geothermal resources is displayed in a series of maps and the depth of the minimum production temperature is used as an indicator of performance and technical feasibility. Suitable aquifers underlay 16% of the Earth's land surface and store an estimated 4·105 to 5·106 EJ that could theoretically be used for direct heat applications. Even with a conservative recovery factor of 1% and an assumed lifetime of 30 years, the annual recoverable geothermal energy is in the same order as the world final energy consumption of 363.5 EJ yr−1. Although the amount of geothermal energy stored in aquifers is vast, geothermal direct heat applications are currently underdeveloped with less than one thousandth of their technical potential used.
Fichier principal
Vignette du fichier
4.pdf (10.99 Mo) Télécharger le fichier
Origin Publisher files allowed on an open archive
Licence

Dates and versions

hal-02860313 , version 1 (29-05-2024)

Licence

Identifiers

Cite

Jon Limberger, Thijs Boxem, Maarten Pluymaekers, David Bruhn, Adele Manzella, et al.. Geothermal energy in deep aquifers: A global assessment of the resource base for direct heat utilization. Renewable and Sustainable Energy Reviews, 2018, 82, pp.961-975. ⟨10.1016/j.rser.2017.09.084⟩. ⟨hal-02860313⟩

Collections

BRGM
36 View
0 Download

Altmetric

Share

Gmail Mastodon Facebook X LinkedIn More