A numerical study of deep borehole heat exchangers in unconventional geothermal systems
Poster presented at the Cranfield Doctoral Network Annual Event 2018. The geothermal energy sector is facing numerous challenges related to heat recovery efficiency and economic feasibility. Ongoing research on superheated/supercritical geothermal system, potentially representing a intensive amount...
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ftcranfieldunfig:oai:figshare.com:article/7206791 2023-05-15T16:51:28+02:00 A numerical study of deep borehole heat exchangers in unconventional geothermal systems Théo Renaud 2018-10-22T09:16:05Z https://doi.org/10.17862/cranfield.rd.7206791.v1 https://figshare.com/articles/poster/A_numerical_study_of_deep_borehole_heat_exchangers_in_unconventional_geothermal_systems/7206791 unknown doi:10.17862/cranfield.rd.7206791.v1 https://figshare.com/articles/poster/A_numerical_study_of_deep_borehole_heat_exchangers_in_unconventional_geothermal_systems/7206791 CC BY 4.0 CC-BY Uncategorized borehole heat exchange IDDP CFD CranfieldDN2018 Image Poster 2018 ftcranfieldunfig https://doi.org/10.17862/cranfield.rd.7206791.v1 2022-02-09T19:00:18Z Poster presented at the Cranfield Doctoral Network Annual Event 2018. The geothermal energy sector is facing numerous challenges related to heat recovery efficiency and economic feasibility. Ongoing research on superheated/supercritical geothermal system, potentially representing a intensive amount of energy, is developed in Europe notably the Iceland Deep Drilling project (IDDP). The well IDDP-1, which reached a magma intrusion at a depth of 2100 m, raised new opportunities to untap the geothermal potential near shallow magmatic intrusions. Given their highly corrosive nature, geothermal fluids weaken the wellbore’s integrity during conventional geothermal production. Deep Borehole Heat Exchangers (DBHE) that do not require fluid exchange between the surface and the wells represent a strategic alternative to recovering heat from these unconventional geothermal resources, while minimising the risk of in-situ reservoir damage. The thermal influence and heat recovery associated with a hypothetical DBHE drilled into the IDDP geological settings were investigated via Computational Fluid Dynamics (CFD) techniques until 10 years of production, when the system reaches full equilibrium. Two wellbore designs were simulated, based on simplified geological properties from the IDDP-1 well description. The results show that, during the first year of production, the output temperature is function of the working fluid velocity before reaching pseudo-steady state behaviour. The cooling perturbation near the bottom hole is shown to grow radially from 10 to 40 m between 1 and 10 years of production, and the output thermal power calculated after 10 years reaches 1.2 MW for a single well. Still Image Iceland Cranfield University: Cranfield Online Research Data (CORD - Figshare) |
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Cranfield University: Cranfield Online Research Data (CORD - Figshare) |
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Uncategorized borehole heat exchange IDDP CFD CranfieldDN2018 |
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Uncategorized borehole heat exchange IDDP CFD CranfieldDN2018 Théo Renaud A numerical study of deep borehole heat exchangers in unconventional geothermal systems |
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Uncategorized borehole heat exchange IDDP CFD CranfieldDN2018 |
description |
Poster presented at the Cranfield Doctoral Network Annual Event 2018. The geothermal energy sector is facing numerous challenges related to heat recovery efficiency and economic feasibility. Ongoing research on superheated/supercritical geothermal system, potentially representing a intensive amount of energy, is developed in Europe notably the Iceland Deep Drilling project (IDDP). The well IDDP-1, which reached a magma intrusion at a depth of 2100 m, raised new opportunities to untap the geothermal potential near shallow magmatic intrusions. Given their highly corrosive nature, geothermal fluids weaken the wellbore’s integrity during conventional geothermal production. Deep Borehole Heat Exchangers (DBHE) that do not require fluid exchange between the surface and the wells represent a strategic alternative to recovering heat from these unconventional geothermal resources, while minimising the risk of in-situ reservoir damage. The thermal influence and heat recovery associated with a hypothetical DBHE drilled into the IDDP geological settings were investigated via Computational Fluid Dynamics (CFD) techniques until 10 years of production, when the system reaches full equilibrium. Two wellbore designs were simulated, based on simplified geological properties from the IDDP-1 well description. The results show that, during the first year of production, the output temperature is function of the working fluid velocity before reaching pseudo-steady state behaviour. The cooling perturbation near the bottom hole is shown to grow radially from 10 to 40 m between 1 and 10 years of production, and the output thermal power calculated after 10 years reaches 1.2 MW for a single well. |
format |
Still Image |
author |
Théo Renaud |
author_facet |
Théo Renaud |
author_sort |
Théo Renaud |
title |
A numerical study of deep borehole heat exchangers in unconventional geothermal systems |
title_short |
A numerical study of deep borehole heat exchangers in unconventional geothermal systems |
title_full |
A numerical study of deep borehole heat exchangers in unconventional geothermal systems |
title_fullStr |
A numerical study of deep borehole heat exchangers in unconventional geothermal systems |
title_full_unstemmed |
A numerical study of deep borehole heat exchangers in unconventional geothermal systems |
title_sort |
numerical study of deep borehole heat exchangers in unconventional geothermal systems |
publishDate |
2018 |
url |
https://doi.org/10.17862/cranfield.rd.7206791.v1 https://figshare.com/articles/poster/A_numerical_study_of_deep_borehole_heat_exchangers_in_unconventional_geothermal_systems/7206791 |
genre |
Iceland |
genre_facet |
Iceland |
op_relation |
doi:10.17862/cranfield.rd.7206791.v1 https://figshare.com/articles/poster/A_numerical_study_of_deep_borehole_heat_exchangers_in_unconventional_geothermal_systems/7206791 |
op_rights |
CC BY 4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.17862/cranfield.rd.7206791.v1 |
_version_ |
1766041588267483136 |