Numerical Simulation of a Shallow Geothermal Heating/Cooling System
In recent years, sustainability concerns have played an increasingly important role in building design, leading to rapid adoption of shallow geothermal heating/cooling systems. Understanding the heat exchange with the ground and associated thermo-hydro-mechanical processes involved is critical to en...
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| Format: | Article |
| Language: | en_US |
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American Society of Civil Engineers (ASCE)
2017
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| Online Access: | http://hdl.handle.net/1721.1/111841 https://orcid.org/0000-0002-3428-676X https://orcid.org/0000-0001-5358-4140 |
| _version_ | 1826202431173689344 |
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| author | Zymnis, Despina Maria Whittle, Andrew |
| author2 | Massachusetts Institute of Technology. Department of Civil and Environmental Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Civil and Environmental Engineering Zymnis, Despina Maria Whittle, Andrew |
| author_sort | Zymnis, Despina Maria |
| collection | MIT |
| description | In recent years, sustainability concerns have played an increasingly important role in building design, leading to rapid adoption of shallow geothermal heating/cooling systems. Understanding the heat exchange with the ground and associated thermo-hydro-mechanical processes involved is critical to ensure safe, efficient long-term performance of these geothermal systems. The current study considers heating/cooling loads for a large office building in Chicago, based on recommendations for typical DOE Commercial Benchmark Buildings and solves the coupled thermo-hydro-mechanical response of different soil types using the Code_Bright program. The paper considers a closed-loop system comprising an array of 80 m deep vertical heat exchangers that operates on a seasonal cycle with zero net heat transfer to the ground and can supply a heating load up to 2440 kW. Using estimated thermal properties of the Chicago clays, the THM analyses show negligible drift in the temperature within the surrounding ground for long-term operation of the geothermal system. However, when thermo-elastoplastic properties are considered, the analyses show that thermal cycling induces long-term settlements of the building. |
| first_indexed | 2024-09-23T12:07:22Z |
| format | Article |
| id | mit-1721.1/111841 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T12:07:22Z |
| publishDate | 2017 |
| publisher | American Society of Civil Engineers (ASCE) |
| record_format | dspace |
| spelling | mit-1721.1/1118412022-10-01T08:21:23Z Numerical Simulation of a Shallow Geothermal Heating/Cooling System Zymnis, Despina Maria Whittle, Andrew Massachusetts Institute of Technology. Department of Civil and Environmental Engineering Whittle, Andrew Zymnis, Despina Maria Whittle, Andrew In recent years, sustainability concerns have played an increasingly important role in building design, leading to rapid adoption of shallow geothermal heating/cooling systems. Understanding the heat exchange with the ground and associated thermo-hydro-mechanical processes involved is critical to ensure safe, efficient long-term performance of these geothermal systems. The current study considers heating/cooling loads for a large office building in Chicago, based on recommendations for typical DOE Commercial Benchmark Buildings and solves the coupled thermo-hydro-mechanical response of different soil types using the Code_Bright program. The paper considers a closed-loop system comprising an array of 80 m deep vertical heat exchangers that operates on a seasonal cycle with zero net heat transfer to the ground and can supply a heating load up to 2440 kW. Using estimated thermal properties of the Chicago clays, the THM analyses show negligible drift in the temperature within the surrounding ground for long-term operation of the geothermal system. However, when thermo-elastoplastic properties are considered, the analyses show that thermal cycling induces long-term settlements of the building. 2017-10-13T15:58:04Z 2017-10-13T15:58:04Z 2014-02 Article http://purl.org/eprint/type/ConferencePaper 9780784413272 http://hdl.handle.net/1721.1/111841 Zymnis, Despina M., and Whittle, Andrew J. “Numerical Simulation of a Shallow Geothermal Heating/Cooling System.” Geo-Congress 2014 Technical Papers February 23-26 2014, Atlanta, Georgia, USA, edited by Murad Abu-Farsakh, American Society of Civil Engineers (ASCE), February 2014 https://orcid.org/0000-0002-3428-676X https://orcid.org/0000-0001-5358-4140 en_US https://doi.org/10.1061/9780784413272.267 Geo-Congress 2014 Technical Papers Creative Commons Attribution-Noncommercial-Share Alike http://creativecommons.org/licenses/by-nc-sa/4.0/ application/pdf American Society of Civil Engineers (ASCE) Prof. Whittle via Anne Graham |
| spellingShingle | Zymnis, Despina Maria Whittle, Andrew Numerical Simulation of a Shallow Geothermal Heating/Cooling System |
| title | Numerical Simulation of a Shallow Geothermal Heating/Cooling System |
| title_full | Numerical Simulation of a Shallow Geothermal Heating/Cooling System |
| title_fullStr | Numerical Simulation of a Shallow Geothermal Heating/Cooling System |
| title_full_unstemmed | Numerical Simulation of a Shallow Geothermal Heating/Cooling System |
| title_short | Numerical Simulation of a Shallow Geothermal Heating/Cooling System |
| title_sort | numerical simulation of a shallow geothermal heating cooling system |
| url | http://hdl.handle.net/1721.1/111841 https://orcid.org/0000-0002-3428-676X https://orcid.org/0000-0001-5358-4140 |
| work_keys_str_mv | AT zymnisdespinamaria numericalsimulationofashallowgeothermalheatingcoolingsystem AT whittleandrew numericalsimulationofashallowgeothermalheatingcoolingsystem |