Thermal performance of three horizontal ground heat exchanger systems: comparison of linear-loop, spiral-coil and slinky-coil arrangements
Ground source heat pumps (GSHPs) are highly efficient for heating and cooling buildings. Among the different types of ground source heat pumps, horizontal ground heat exchangers (HGHEs) gaining popularity due to their cost-effectiveness, ease of installation and high regeneration capacity. However,...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2023-10-01
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| Series: | Frontiers in Energy Research |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fenrg.2023.1188506/full |
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| author | Linwei Hu Linwei Hu Zarghaam Haider Rizvi Lisa Tobber Frank Wuttke |
| author_facet | Linwei Hu Linwei Hu Zarghaam Haider Rizvi Lisa Tobber Frank Wuttke |
| author_sort | Linwei Hu |
| collection | DOAJ |
| description | Ground source heat pumps (GSHPs) are highly efficient for heating and cooling buildings. Among the different types of ground source heat pumps, horizontal ground heat exchangers (HGHEs) gaining popularity due to their cost-effectiveness, ease of installation and high regeneration capacity. However, studies on the interaction and influence of the local environment with the HGHE and the thermal performance influenced by the arrangement and performance of the HGHE are insufficient. This study uses a three-dimensional numerical model to simulate three types of HGHEs, including linear-loop, spiral-coil, and slinky-coil arrangements. Instead of just one unit, three units are connected in series or parallel. The model considers the energy balance and the heat transfer and exchange processes between the heat exchanger and the soil. Simulation of cooling and heating for 1 year revealed that the slinky-coil arrangement is the most affected by heat fluxes at the ground surface, because of its maximum length, which leads to its lowest coefficient of performance (COP) value. The thermal performance of linear-loop and spiral-coil arrangements is similar, but considering the material cost, the linear-coil arrangement has the lowest installation cost and operating cost for 30 years. |
| first_indexed | 2024-03-11T18:35:09Z |
| format | Article |
| id | doaj.art-a16b58ef3cda45a4a409d5dfc27cadd8 |
| institution | Directory Open Access Journal |
| issn | 2296-598X |
| language | English |
| last_indexed | 2024-03-11T18:35:09Z |
| publishDate | 2023-10-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Energy Research |
| spelling | doaj.art-a16b58ef3cda45a4a409d5dfc27cadd82023-10-13T05:16:43ZengFrontiers Media S.A.Frontiers in Energy Research2296-598X2023-10-011110.3389/fenrg.2023.11885061188506Thermal performance of three horizontal ground heat exchanger systems: comparison of linear-loop, spiral-coil and slinky-coil arrangementsLinwei Hu0Linwei Hu1Zarghaam Haider Rizvi2Lisa Tobber3Frank Wuttke4Institute of Geosciences, Kiel University, Kiel, GermanyGeoAnalysis Engineering GmbH, Kiel, GermanyGeoAnalysis Engineering GmbH, Kiel, GermanySchool of Engineering, The University of British Columbia, Kelowna, BC, CanadaInstitute of Geosciences, Kiel University, Kiel, GermanyGround source heat pumps (GSHPs) are highly efficient for heating and cooling buildings. Among the different types of ground source heat pumps, horizontal ground heat exchangers (HGHEs) gaining popularity due to their cost-effectiveness, ease of installation and high regeneration capacity. However, studies on the interaction and influence of the local environment with the HGHE and the thermal performance influenced by the arrangement and performance of the HGHE are insufficient. This study uses a three-dimensional numerical model to simulate three types of HGHEs, including linear-loop, spiral-coil, and slinky-coil arrangements. Instead of just one unit, three units are connected in series or parallel. The model considers the energy balance and the heat transfer and exchange processes between the heat exchanger and the soil. Simulation of cooling and heating for 1 year revealed that the slinky-coil arrangement is the most affected by heat fluxes at the ground surface, because of its maximum length, which leads to its lowest coefficient of performance (COP) value. The thermal performance of linear-loop and spiral-coil arrangements is similar, but considering the material cost, the linear-coil arrangement has the lowest installation cost and operating cost for 30 years.https://www.frontiersin.org/articles/10.3389/fenrg.2023.1188506/fullground source heat pump (GSHP)linear-loop horizontal ground heat exchangerspiral-coil horizontal ground heat exchangerslinky-coil horizontal ground heat exchangerthermal performance comparisonscoefficient of performance (COP) |
| spellingShingle | Linwei Hu Linwei Hu Zarghaam Haider Rizvi Lisa Tobber Frank Wuttke Thermal performance of three horizontal ground heat exchanger systems: comparison of linear-loop, spiral-coil and slinky-coil arrangements Frontiers in Energy Research ground source heat pump (GSHP) linear-loop horizontal ground heat exchanger spiral-coil horizontal ground heat exchanger slinky-coil horizontal ground heat exchanger thermal performance comparisons coefficient of performance (COP) |
| title | Thermal performance of three horizontal ground heat exchanger systems: comparison of linear-loop, spiral-coil and slinky-coil arrangements |
| title_full | Thermal performance of three horizontal ground heat exchanger systems: comparison of linear-loop, spiral-coil and slinky-coil arrangements |
| title_fullStr | Thermal performance of three horizontal ground heat exchanger systems: comparison of linear-loop, spiral-coil and slinky-coil arrangements |
| title_full_unstemmed | Thermal performance of three horizontal ground heat exchanger systems: comparison of linear-loop, spiral-coil and slinky-coil arrangements |
| title_short | Thermal performance of three horizontal ground heat exchanger systems: comparison of linear-loop, spiral-coil and slinky-coil arrangements |
| title_sort | thermal performance of three horizontal ground heat exchanger systems comparison of linear loop spiral coil and slinky coil arrangements |
| topic | ground source heat pump (GSHP) linear-loop horizontal ground heat exchanger spiral-coil horizontal ground heat exchanger slinky-coil horizontal ground heat exchanger thermal performance comparisons coefficient of performance (COP) |
| url | https://www.frontiersin.org/articles/10.3389/fenrg.2023.1188506/full |
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