Evaluation of the Effect of Anti-Corrosion Coatings on the Thermal Resistance of Ground Heat Exchangers for Shallow Geothermal Applications
The materials and the technology used to build the ground heat exchangers significantly affect the heat transfer performance of a geothermal system, in addition to the local geological and hydrogeological context. Among expense items such as the coupled heat pumps and the applied drilling technology...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-04-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/14/9/2586 |
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| author | Gianluca Cadelano Alessandro Bortolin Giovanni Ferrarini Paolo Bison Giorgia Dalla Santa Eloisa Di Sipio Adriana Bernardi Antonio Galgaro |
| author_facet | Gianluca Cadelano Alessandro Bortolin Giovanni Ferrarini Paolo Bison Giorgia Dalla Santa Eloisa Di Sipio Adriana Bernardi Antonio Galgaro |
| author_sort | Gianluca Cadelano |
| collection | DOAJ |
| description | The materials and the technology used to build the ground heat exchangers significantly affect the heat transfer performance of a geothermal system, in addition to the local geological and hydrogeological context. Among expense items such as the coupled heat pumps and the applied drilling technology, the heat exchangers play a key role in the shallow geothermal market. For this reason, they are usually made with plastic. Metal tubes are not widely used because of corrosion issues, which can compromise the reliability of the system over time. According to best practices, metal is an unfavorable choice if the pipes are not made of corrosion resistant alloys, such as stainless steel, but the overall performance is strongly related to the heat transfer efficiency. In this study, laser-flash technique is applied on carbon steel samples with anti-corrosion coatings and on corrosion resistant materials (stainless steel grades used for pipes), thus, allowing the comparison of their thermophysical properties. These properties are used to evaluate each solution in terms of thermal resistance. This study demonstrates that there are no particular corrosion resistant steel pipe configurations that are thermally favorable over others in a critical way. |
| first_indexed | 2024-03-10T11:46:23Z |
| format | Article |
| id | doaj.art-905a66f9d8f94fee904e39b04596fb0f |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T11:46:23Z |
| publishDate | 2021-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-905a66f9d8f94fee904e39b04596fb0f2023-11-21T18:03:49ZengMDPI AGEnergies1996-10732021-04-01149258610.3390/en14092586Evaluation of the Effect of Anti-Corrosion Coatings on the Thermal Resistance of Ground Heat Exchangers for Shallow Geothermal ApplicationsGianluca Cadelano0Alessandro Bortolin1Giovanni Ferrarini2Paolo Bison3Giorgia Dalla Santa4Eloisa Di Sipio5Adriana Bernardi6Antonio Galgaro7Institute of Atmospheric Sciences and Climate (CNR-ISAC), National Research Council of Italy, 35127 Padua, ItalyInstitute of Atmospheric Sciences and Climate (CNR-ISAC), National Research Council of Italy, 35127 Padua, ItalyInstitute of Construction Technologies (CNR-ITC), National Research Council of Italy, 35127 Padua, ItalyInstitute of Construction Technologies (CNR-ITC), National Research Council of Italy, 35127 Padua, ItalyDepartment of Geosciences, University of Padua, 35131 Padua, ItalyDepartment of Geosciences, University of Padua, 35131 Padua, ItalyInstitute of Atmospheric Sciences and Climate (CNR-ISAC), National Research Council of Italy, 35127 Padua, ItalyDepartment of Geosciences, University of Padua, 35131 Padua, ItalyThe materials and the technology used to build the ground heat exchangers significantly affect the heat transfer performance of a geothermal system, in addition to the local geological and hydrogeological context. Among expense items such as the coupled heat pumps and the applied drilling technology, the heat exchangers play a key role in the shallow geothermal market. For this reason, they are usually made with plastic. Metal tubes are not widely used because of corrosion issues, which can compromise the reliability of the system over time. According to best practices, metal is an unfavorable choice if the pipes are not made of corrosion resistant alloys, such as stainless steel, but the overall performance is strongly related to the heat transfer efficiency. In this study, laser-flash technique is applied on carbon steel samples with anti-corrosion coatings and on corrosion resistant materials (stainless steel grades used for pipes), thus, allowing the comparison of their thermophysical properties. These properties are used to evaluate each solution in terms of thermal resistance. This study demonstrates that there are no particular corrosion resistant steel pipe configurations that are thermally favorable over others in a critical way.https://www.mdpi.com/1996-1073/14/9/2586shallow geothermal energycoaxial heat exchangerspipe corrosionrenewable energypipe materialsthermal properties |
| spellingShingle | Gianluca Cadelano Alessandro Bortolin Giovanni Ferrarini Paolo Bison Giorgia Dalla Santa Eloisa Di Sipio Adriana Bernardi Antonio Galgaro Evaluation of the Effect of Anti-Corrosion Coatings on the Thermal Resistance of Ground Heat Exchangers for Shallow Geothermal Applications Energies shallow geothermal energy coaxial heat exchangers pipe corrosion renewable energy pipe materials thermal properties |
| title | Evaluation of the Effect of Anti-Corrosion Coatings on the Thermal Resistance of Ground Heat Exchangers for Shallow Geothermal Applications |
| title_full | Evaluation of the Effect of Anti-Corrosion Coatings on the Thermal Resistance of Ground Heat Exchangers for Shallow Geothermal Applications |
| title_fullStr | Evaluation of the Effect of Anti-Corrosion Coatings on the Thermal Resistance of Ground Heat Exchangers for Shallow Geothermal Applications |
| title_full_unstemmed | Evaluation of the Effect of Anti-Corrosion Coatings on the Thermal Resistance of Ground Heat Exchangers for Shallow Geothermal Applications |
| title_short | Evaluation of the Effect of Anti-Corrosion Coatings on the Thermal Resistance of Ground Heat Exchangers for Shallow Geothermal Applications |
| title_sort | evaluation of the effect of anti corrosion coatings on the thermal resistance of ground heat exchangers for shallow geothermal applications |
| topic | shallow geothermal energy coaxial heat exchangers pipe corrosion renewable energy pipe materials thermal properties |
| url | https://www.mdpi.com/1996-1073/14/9/2586 |
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