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Sustainability evaluation of a medium scale GSHP system in a layered alluvial setting using 3D modeling suite.

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Title: Sustainability evaluation of a medium scale GSHP system in a layered alluvial setting using 3D modeling suite.
Authors: Perego, R.1 dodiperego87@virgilio.it, Guandalini, R.2, Fumagalli, L.1, Aghib, F.S.3, De Biase, L.1, Bonomi, T.1
Source: Geothermics. Jan2016 Part A, Vol. 59, p14-26. 13p.
Subjects: Ground source heat pump systems, Sustainable development, Alluvial plains, Geological modeling, Thermal analysis, Computer simulation
Abstract: In this study the effects on the thermal field of a medium scale GSHP system located in Alessandria (Italy) and installed in highly heterogeneous alluvials are considered. The system was monitored over a year and data showed a progressive loss of efficiency. Simulation results obtained from a 3D numerical model show that the analyzed GSHP system has an inadequate design even for a short/medium period operation. A strong probe interference phenomenon was observed, due to the particular layout of the probe field and to the high energy request for building conditioning. The efficiency loss is also amplified by the presence of alluvial deposits with poor thermal properties. Adopting a homogeneous distribution of the thermal properties of the subsurface results in an underestimation of the thermal alteration of 25% while the increase of probe distance by 55% produces a reduction of thermal alteration of 45%. In this case study the homogeneous subsurface assumption leads to excessive simplification of the observed strong heterogeneity and it underrates thermal impact on the soil, especially in layers with poor thermal properties. [ABSTRACT FROM AUTHOR]
Copyright of Geothermics is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
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  Data: Sustainability evaluation of a medium scale GSHP system in a layered alluvial setting using 3D modeling suite.
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  Data: <searchLink fieldCode="JN" term="%22Geothermics%22">Geothermics</searchLink>. Jan2016 Part A, Vol. 59, p14-26. 13p.
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  Data: <searchLink fieldCode="DE" term="%22Ground+source+heat+pump+systems%22">Ground source heat pump systems</searchLink><br /><searchLink fieldCode="DE" term="%22Sustainable+development%22">Sustainable development</searchLink><br /><searchLink fieldCode="DE" term="%22Alluvial+plains%22">Alluvial plains</searchLink><br /><searchLink fieldCode="DE" term="%22Geological+modeling%22">Geological modeling</searchLink><br /><searchLink fieldCode="DE" term="%22Thermal+analysis%22">Thermal analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Computer+simulation%22">Computer simulation</searchLink>
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  Data: In this study the effects on the thermal field of a medium scale GSHP system located in Alessandria (Italy) and installed in highly heterogeneous alluvials are considered. The system was monitored over a year and data showed a progressive loss of efficiency. Simulation results obtained from a 3D numerical model show that the analyzed GSHP system has an inadequate design even for a short/medium period operation. A strong probe interference phenomenon was observed, due to the particular layout of the probe field and to the high energy request for building conditioning. The efficiency loss is also amplified by the presence of alluvial deposits with poor thermal properties. Adopting a homogeneous distribution of the thermal properties of the subsurface results in an underestimation of the thermal alteration of 25% while the increase of probe distance by 55% produces a reduction of thermal alteration of 45%. In this case study the homogeneous subsurface assumption leads to excessive simplification of the observed strong heterogeneity and it underrates thermal impact on the soil, especially in layers with poor thermal properties. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
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  Data: <i>Copyright of Geothermics is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.geothermics.2015.10.003
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      – Code: eng
        Text: English
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        PageCount: 13
        StartPage: 14
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      – SubjectFull: Ground source heat pump systems
        Type: general
      – SubjectFull: Sustainable development
        Type: general
      – SubjectFull: Alluvial plains
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      – SubjectFull: Geological modeling
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      – SubjectFull: Thermal analysis
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      – SubjectFull: Computer simulation
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      – TitleFull: Sustainability evaluation of a medium scale GSHP system in a layered alluvial setting using 3D modeling suite.
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              Text: Jan2016 Part A
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