Advanced thermal response tests: A review
In this study, the historical and technical development and the current status of distributed (DTRT) and enhanced (ETRT) thermal response tests (TRT) are reviewed. The different test setups of these advanced TRT are critically assessed and future research questions are outlined. Advanced TRT use spe...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Wilke, Sascha [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2020transfer abstract |
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| Schlagwörter: |
Enhanced thermal response test Distributed temperature sensing |
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| Übergeordnetes Werk: |
Enthalten in: Reliability, validity and responsiveness of the squares test for manual dexterity in people with Parkinson’s disease - Soke, Fatih ELSEVIER, 2019, an international journal, Amsterdam [u.a.] |
|---|---|
| Übergeordnetes Werk: |
volume:119 ; year:2020 ; pages:0 |
| Links: |
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| DOI / URN: |
10.1016/j.rser.2019.109575 |
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| Katalog-ID: |
ELV049288008 |
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| 520 | |a In this study, the historical and technical development and the current status of distributed (DTRT) and enhanced (ETRT) thermal response tests (TRT) are reviewed. The different test setups of these advanced TRT are critically assessed and future research questions are outlined. Advanced TRT use specific temperature measurement techniques for the depth-resolved determination of site-specific ground parameters that are required for an optimal design of borehole heat exchanger (BHE) fields. The depth-resolved determination of these thermal properties, such as effective thermal conductivities and thermal borehole resistances, is the key advantage in comparison to conventional TRT, promising economic benefits during the installation and operating phase of ground source heat pump (GSHP) systems. Various test setups exist which differ regarding the heating procedure, i.e. circulating heating fluid and heating wire, the temperature measurement technique, i.e. optical fiber and wireless probe, as well as in their suitability for parameter estimation. These advanced techniques can furthermore provide information about geological layers, fractured zones and groundwater influenced sections in the subsurface as well as inadequate backfilled zones along the borehole heat exchanger. Despite this, advanced TRT are reported in international literature only for a few locations and some test setups are purely theoretical without any practical demonstration. Uncertainties exist regarding the comparability of the test setups, the sensitivity of the measurement devices under test conditions, as well as the best evaluation procedure. Also, scarce information is available about the use beyond academic field and economic aspects in comparison to conventional TRT. Encouraging further research and a more extensive transfer of these promising techniques from academia to practice is therefore also the aim of this review. | ||
| 520 | |a In this study, the historical and technical development and the current status of distributed (DTRT) and enhanced (ETRT) thermal response tests (TRT) are reviewed. The different test setups of these advanced TRT are critically assessed and future research questions are outlined. Advanced TRT use specific temperature measurement techniques for the depth-resolved determination of site-specific ground parameters that are required for an optimal design of borehole heat exchanger (BHE) fields. The depth-resolved determination of these thermal properties, such as effective thermal conductivities and thermal borehole resistances, is the key advantage in comparison to conventional TRT, promising economic benefits during the installation and operating phase of ground source heat pump (GSHP) systems. Various test setups exist which differ regarding the heating procedure, i.e. circulating heating fluid and heating wire, the temperature measurement technique, i.e. optical fiber and wireless probe, as well as in their suitability for parameter estimation. These advanced techniques can furthermore provide information about geological layers, fractured zones and groundwater influenced sections in the subsurface as well as inadequate backfilled zones along the borehole heat exchanger. Despite this, advanced TRT are reported in international literature only for a few locations and some test setups are purely theoretical without any practical demonstration. Uncertainties exist regarding the comparability of the test setups, the sensitivity of the measurement devices under test conditions, as well as the best evaluation procedure. Also, scarce information is available about the use beyond academic field and economic aspects in comparison to conventional TRT. Encouraging further research and a more extensive transfer of these promising techniques from academia to practice is therefore also the aim of this review. | ||
| 650 | 7 | |a Enhanced thermal response test |2 Elsevier | |
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10.1016/j.rser.2019.109575 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000000918.pica (DE-627)ELV049288008 (ELSEVIER)S1364-0321(19)30783-X DE-627 ger DE-627 rakwb eng 610 VZ 44.90 bkl 44.65 bkl Wilke, Sascha verfasserin aut Advanced thermal response tests: A review 2020transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier In this study, the historical and technical development and the current status of distributed (DTRT) and enhanced (ETRT) thermal response tests (TRT) are reviewed. The different test setups of these advanced TRT are critically assessed and future research questions are outlined. Advanced TRT use specific temperature measurement techniques for the depth-resolved determination of site-specific ground parameters that are required for an optimal design of borehole heat exchanger (BHE) fields. The depth-resolved determination of these thermal properties, such as effective thermal conductivities and thermal borehole resistances, is the key advantage in comparison to conventional TRT, promising economic benefits during the installation and operating phase of ground source heat pump (GSHP) systems. Various test setups exist which differ regarding the heating procedure, i.e. circulating heating fluid and heating wire, the temperature measurement technique, i.e. optical fiber and wireless probe, as well as in their suitability for parameter estimation. These advanced techniques can furthermore provide information about geological layers, fractured zones and groundwater influenced sections in the subsurface as well as inadequate backfilled zones along the borehole heat exchanger. Despite this, advanced TRT are reported in international literature only for a few locations and some test setups are purely theoretical without any practical demonstration. Uncertainties exist regarding the comparability of the test setups, the sensitivity of the measurement devices under test conditions, as well as the best evaluation procedure. Also, scarce information is available about the use beyond academic field and economic aspects in comparison to conventional TRT. Encouraging further research and a more extensive transfer of these promising techniques from academia to practice is therefore also the aim of this review. In this study, the historical and technical development and the current status of distributed (DTRT) and enhanced (ETRT) thermal response tests (TRT) are reviewed. The different test setups of these advanced TRT are critically assessed and future research questions are outlined. Advanced TRT use specific temperature measurement techniques for the depth-resolved determination of site-specific ground parameters that are required for an optimal design of borehole heat exchanger (BHE) fields. The depth-resolved determination of these thermal properties, such as effective thermal conductivities and thermal borehole resistances, is the key advantage in comparison to conventional TRT, promising economic benefits during the installation and operating phase of ground source heat pump (GSHP) systems. Various test setups exist which differ regarding the heating procedure, i.e. circulating heating fluid and heating wire, the temperature measurement technique, i.e. optical fiber and wireless probe, as well as in their suitability for parameter estimation. These advanced techniques can furthermore provide information about geological layers, fractured zones and groundwater influenced sections in the subsurface as well as inadequate backfilled zones along the borehole heat exchanger. Despite this, advanced TRT are reported in international literature only for a few locations and some test setups are purely theoretical without any practical demonstration. Uncertainties exist regarding the comparability of the test setups, the sensitivity of the measurement devices under test conditions, as well as the best evaluation procedure. Also, scarce information is available about the use beyond academic field and economic aspects in comparison to conventional TRT. Encouraging further research and a more extensive transfer of these promising techniques from academia to practice is therefore also the aim of this review. Enhanced thermal response test Elsevier Distributed temperature sensing Elsevier Kelvin`s line source Elsevier Effective thermal conductivity Elsevier Shallow geothermal energy Elsevier Distributed thermal response test Elsevier Menberg, Kathrin oth Steger, Hagen oth Blum, Philipp oth Enthalten in Elsevier Science Soke, Fatih ELSEVIER Reliability, validity and responsiveness of the squares test for manual dexterity in people with Parkinson’s disease 2019 an international journal Amsterdam [u.a.] (DE-627)ELV003073483 volume:119 year:2020 pages:0 https://doi.org/10.1016/j.rser.2019.109575 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA 44.90 Neurologie VZ 44.65 Chirurgie VZ AR 119 2020 0 |
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10.1016/j.rser.2019.109575 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000000918.pica (DE-627)ELV049288008 (ELSEVIER)S1364-0321(19)30783-X DE-627 ger DE-627 rakwb eng 610 VZ 44.90 bkl 44.65 bkl Wilke, Sascha verfasserin aut Advanced thermal response tests: A review 2020transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier In this study, the historical and technical development and the current status of distributed (DTRT) and enhanced (ETRT) thermal response tests (TRT) are reviewed. The different test setups of these advanced TRT are critically assessed and future research questions are outlined. Advanced TRT use specific temperature measurement techniques for the depth-resolved determination of site-specific ground parameters that are required for an optimal design of borehole heat exchanger (BHE) fields. The depth-resolved determination of these thermal properties, such as effective thermal conductivities and thermal borehole resistances, is the key advantage in comparison to conventional TRT, promising economic benefits during the installation and operating phase of ground source heat pump (GSHP) systems. Various test setups exist which differ regarding the heating procedure, i.e. circulating heating fluid and heating wire, the temperature measurement technique, i.e. optical fiber and wireless probe, as well as in their suitability for parameter estimation. These advanced techniques can furthermore provide information about geological layers, fractured zones and groundwater influenced sections in the subsurface as well as inadequate backfilled zones along the borehole heat exchanger. Despite this, advanced TRT are reported in international literature only for a few locations and some test setups are purely theoretical without any practical demonstration. Uncertainties exist regarding the comparability of the test setups, the sensitivity of the measurement devices under test conditions, as well as the best evaluation procedure. Also, scarce information is available about the use beyond academic field and economic aspects in comparison to conventional TRT. Encouraging further research and a more extensive transfer of these promising techniques from academia to practice is therefore also the aim of this review. In this study, the historical and technical development and the current status of distributed (DTRT) and enhanced (ETRT) thermal response tests (TRT) are reviewed. The different test setups of these advanced TRT are critically assessed and future research questions are outlined. Advanced TRT use specific temperature measurement techniques for the depth-resolved determination of site-specific ground parameters that are required for an optimal design of borehole heat exchanger (BHE) fields. The depth-resolved determination of these thermal properties, such as effective thermal conductivities and thermal borehole resistances, is the key advantage in comparison to conventional TRT, promising economic benefits during the installation and operating phase of ground source heat pump (GSHP) systems. Various test setups exist which differ regarding the heating procedure, i.e. circulating heating fluid and heating wire, the temperature measurement technique, i.e. optical fiber and wireless probe, as well as in their suitability for parameter estimation. These advanced techniques can furthermore provide information about geological layers, fractured zones and groundwater influenced sections in the subsurface as well as inadequate backfilled zones along the borehole heat exchanger. Despite this, advanced TRT are reported in international literature only for a few locations and some test setups are purely theoretical without any practical demonstration. Uncertainties exist regarding the comparability of the test setups, the sensitivity of the measurement devices under test conditions, as well as the best evaluation procedure. Also, scarce information is available about the use beyond academic field and economic aspects in comparison to conventional TRT. Encouraging further research and a more extensive transfer of these promising techniques from academia to practice is therefore also the aim of this review. Enhanced thermal response test Elsevier Distributed temperature sensing Elsevier Kelvin`s line source Elsevier Effective thermal conductivity Elsevier Shallow geothermal energy Elsevier Distributed thermal response test Elsevier Menberg, Kathrin oth Steger, Hagen oth Blum, Philipp oth Enthalten in Elsevier Science Soke, Fatih ELSEVIER Reliability, validity and responsiveness of the squares test for manual dexterity in people with Parkinson’s disease 2019 an international journal Amsterdam [u.a.] (DE-627)ELV003073483 volume:119 year:2020 pages:0 https://doi.org/10.1016/j.rser.2019.109575 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA 44.90 Neurologie VZ 44.65 Chirurgie VZ AR 119 2020 0 |
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10.1016/j.rser.2019.109575 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000000918.pica (DE-627)ELV049288008 (ELSEVIER)S1364-0321(19)30783-X DE-627 ger DE-627 rakwb eng 610 VZ 44.90 bkl 44.65 bkl Wilke, Sascha verfasserin aut Advanced thermal response tests: A review 2020transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier In this study, the historical and technical development and the current status of distributed (DTRT) and enhanced (ETRT) thermal response tests (TRT) are reviewed. The different test setups of these advanced TRT are critically assessed and future research questions are outlined. Advanced TRT use specific temperature measurement techniques for the depth-resolved determination of site-specific ground parameters that are required for an optimal design of borehole heat exchanger (BHE) fields. The depth-resolved determination of these thermal properties, such as effective thermal conductivities and thermal borehole resistances, is the key advantage in comparison to conventional TRT, promising economic benefits during the installation and operating phase of ground source heat pump (GSHP) systems. Various test setups exist which differ regarding the heating procedure, i.e. circulating heating fluid and heating wire, the temperature measurement technique, i.e. optical fiber and wireless probe, as well as in their suitability for parameter estimation. These advanced techniques can furthermore provide information about geological layers, fractured zones and groundwater influenced sections in the subsurface as well as inadequate backfilled zones along the borehole heat exchanger. Despite this, advanced TRT are reported in international literature only for a few locations and some test setups are purely theoretical without any practical demonstration. Uncertainties exist regarding the comparability of the test setups, the sensitivity of the measurement devices under test conditions, as well as the best evaluation procedure. Also, scarce information is available about the use beyond academic field and economic aspects in comparison to conventional TRT. Encouraging further research and a more extensive transfer of these promising techniques from academia to practice is therefore also the aim of this review. In this study, the historical and technical development and the current status of distributed (DTRT) and enhanced (ETRT) thermal response tests (TRT) are reviewed. The different test setups of these advanced TRT are critically assessed and future research questions are outlined. Advanced TRT use specific temperature measurement techniques for the depth-resolved determination of site-specific ground parameters that are required for an optimal design of borehole heat exchanger (BHE) fields. The depth-resolved determination of these thermal properties, such as effective thermal conductivities and thermal borehole resistances, is the key advantage in comparison to conventional TRT, promising economic benefits during the installation and operating phase of ground source heat pump (GSHP) systems. Various test setups exist which differ regarding the heating procedure, i.e. circulating heating fluid and heating wire, the temperature measurement technique, i.e. optical fiber and wireless probe, as well as in their suitability for parameter estimation. These advanced techniques can furthermore provide information about geological layers, fractured zones and groundwater influenced sections in the subsurface as well as inadequate backfilled zones along the borehole heat exchanger. Despite this, advanced TRT are reported in international literature only for a few locations and some test setups are purely theoretical without any practical demonstration. Uncertainties exist regarding the comparability of the test setups, the sensitivity of the measurement devices under test conditions, as well as the best evaluation procedure. Also, scarce information is available about the use beyond academic field and economic aspects in comparison to conventional TRT. Encouraging further research and a more extensive transfer of these promising techniques from academia to practice is therefore also the aim of this review. Enhanced thermal response test Elsevier Distributed temperature sensing Elsevier Kelvin`s line source Elsevier Effective thermal conductivity Elsevier Shallow geothermal energy Elsevier Distributed thermal response test Elsevier Menberg, Kathrin oth Steger, Hagen oth Blum, Philipp oth Enthalten in Elsevier Science Soke, Fatih ELSEVIER Reliability, validity and responsiveness of the squares test for manual dexterity in people with Parkinson’s disease 2019 an international journal Amsterdam [u.a.] (DE-627)ELV003073483 volume:119 year:2020 pages:0 https://doi.org/10.1016/j.rser.2019.109575 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA 44.90 Neurologie VZ 44.65 Chirurgie VZ AR 119 2020 0 |
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10.1016/j.rser.2019.109575 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000000918.pica (DE-627)ELV049288008 (ELSEVIER)S1364-0321(19)30783-X DE-627 ger DE-627 rakwb eng 610 VZ 44.90 bkl 44.65 bkl Wilke, Sascha verfasserin aut Advanced thermal response tests: A review 2020transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier In this study, the historical and technical development and the current status of distributed (DTRT) and enhanced (ETRT) thermal response tests (TRT) are reviewed. The different test setups of these advanced TRT are critically assessed and future research questions are outlined. Advanced TRT use specific temperature measurement techniques for the depth-resolved determination of site-specific ground parameters that are required for an optimal design of borehole heat exchanger (BHE) fields. The depth-resolved determination of these thermal properties, such as effective thermal conductivities and thermal borehole resistances, is the key advantage in comparison to conventional TRT, promising economic benefits during the installation and operating phase of ground source heat pump (GSHP) systems. Various test setups exist which differ regarding the heating procedure, i.e. circulating heating fluid and heating wire, the temperature measurement technique, i.e. optical fiber and wireless probe, as well as in their suitability for parameter estimation. These advanced techniques can furthermore provide information about geological layers, fractured zones and groundwater influenced sections in the subsurface as well as inadequate backfilled zones along the borehole heat exchanger. Despite this, advanced TRT are reported in international literature only for a few locations and some test setups are purely theoretical without any practical demonstration. Uncertainties exist regarding the comparability of the test setups, the sensitivity of the measurement devices under test conditions, as well as the best evaluation procedure. Also, scarce information is available about the use beyond academic field and economic aspects in comparison to conventional TRT. Encouraging further research and a more extensive transfer of these promising techniques from academia to practice is therefore also the aim of this review. In this study, the historical and technical development and the current status of distributed (DTRT) and enhanced (ETRT) thermal response tests (TRT) are reviewed. The different test setups of these advanced TRT are critically assessed and future research questions are outlined. Advanced TRT use specific temperature measurement techniques for the depth-resolved determination of site-specific ground parameters that are required for an optimal design of borehole heat exchanger (BHE) fields. The depth-resolved determination of these thermal properties, such as effective thermal conductivities and thermal borehole resistances, is the key advantage in comparison to conventional TRT, promising economic benefits during the installation and operating phase of ground source heat pump (GSHP) systems. Various test setups exist which differ regarding the heating procedure, i.e. circulating heating fluid and heating wire, the temperature measurement technique, i.e. optical fiber and wireless probe, as well as in their suitability for parameter estimation. These advanced techniques can furthermore provide information about geological layers, fractured zones and groundwater influenced sections in the subsurface as well as inadequate backfilled zones along the borehole heat exchanger. Despite this, advanced TRT are reported in international literature only for a few locations and some test setups are purely theoretical without any practical demonstration. Uncertainties exist regarding the comparability of the test setups, the sensitivity of the measurement devices under test conditions, as well as the best evaluation procedure. Also, scarce information is available about the use beyond academic field and economic aspects in comparison to conventional TRT. Encouraging further research and a more extensive transfer of these promising techniques from academia to practice is therefore also the aim of this review. Enhanced thermal response test Elsevier Distributed temperature sensing Elsevier Kelvin`s line source Elsevier Effective thermal conductivity Elsevier Shallow geothermal energy Elsevier Distributed thermal response test Elsevier Menberg, Kathrin oth Steger, Hagen oth Blum, Philipp oth Enthalten in Elsevier Science Soke, Fatih ELSEVIER Reliability, validity and responsiveness of the squares test for manual dexterity in people with Parkinson’s disease 2019 an international journal Amsterdam [u.a.] (DE-627)ELV003073483 volume:119 year:2020 pages:0 https://doi.org/10.1016/j.rser.2019.109575 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA 44.90 Neurologie VZ 44.65 Chirurgie VZ AR 119 2020 0 |
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10.1016/j.rser.2019.109575 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000000918.pica (DE-627)ELV049288008 (ELSEVIER)S1364-0321(19)30783-X DE-627 ger DE-627 rakwb eng 610 VZ 44.90 bkl 44.65 bkl Wilke, Sascha verfasserin aut Advanced thermal response tests: A review 2020transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier In this study, the historical and technical development and the current status of distributed (DTRT) and enhanced (ETRT) thermal response tests (TRT) are reviewed. The different test setups of these advanced TRT are critically assessed and future research questions are outlined. Advanced TRT use specific temperature measurement techniques for the depth-resolved determination of site-specific ground parameters that are required for an optimal design of borehole heat exchanger (BHE) fields. The depth-resolved determination of these thermal properties, such as effective thermal conductivities and thermal borehole resistances, is the key advantage in comparison to conventional TRT, promising economic benefits during the installation and operating phase of ground source heat pump (GSHP) systems. Various test setups exist which differ regarding the heating procedure, i.e. circulating heating fluid and heating wire, the temperature measurement technique, i.e. optical fiber and wireless probe, as well as in their suitability for parameter estimation. These advanced techniques can furthermore provide information about geological layers, fractured zones and groundwater influenced sections in the subsurface as well as inadequate backfilled zones along the borehole heat exchanger. Despite this, advanced TRT are reported in international literature only for a few locations and some test setups are purely theoretical without any practical demonstration. Uncertainties exist regarding the comparability of the test setups, the sensitivity of the measurement devices under test conditions, as well as the best evaluation procedure. Also, scarce information is available about the use beyond academic field and economic aspects in comparison to conventional TRT. Encouraging further research and a more extensive transfer of these promising techniques from academia to practice is therefore also the aim of this review. In this study, the historical and technical development and the current status of distributed (DTRT) and enhanced (ETRT) thermal response tests (TRT) are reviewed. The different test setups of these advanced TRT are critically assessed and future research questions are outlined. Advanced TRT use specific temperature measurement techniques for the depth-resolved determination of site-specific ground parameters that are required for an optimal design of borehole heat exchanger (BHE) fields. The depth-resolved determination of these thermal properties, such as effective thermal conductivities and thermal borehole resistances, is the key advantage in comparison to conventional TRT, promising economic benefits during the installation and operating phase of ground source heat pump (GSHP) systems. Various test setups exist which differ regarding the heating procedure, i.e. circulating heating fluid and heating wire, the temperature measurement technique, i.e. optical fiber and wireless probe, as well as in their suitability for parameter estimation. These advanced techniques can furthermore provide information about geological layers, fractured zones and groundwater influenced sections in the subsurface as well as inadequate backfilled zones along the borehole heat exchanger. Despite this, advanced TRT are reported in international literature only for a few locations and some test setups are purely theoretical without any practical demonstration. Uncertainties exist regarding the comparability of the test setups, the sensitivity of the measurement devices under test conditions, as well as the best evaluation procedure. Also, scarce information is available about the use beyond academic field and economic aspects in comparison to conventional TRT. Encouraging further research and a more extensive transfer of these promising techniques from academia to practice is therefore also the aim of this review. Enhanced thermal response test Elsevier Distributed temperature sensing Elsevier Kelvin`s line source Elsevier Effective thermal conductivity Elsevier Shallow geothermal energy Elsevier Distributed thermal response test Elsevier Menberg, Kathrin oth Steger, Hagen oth Blum, Philipp oth Enthalten in Elsevier Science Soke, Fatih ELSEVIER Reliability, validity and responsiveness of the squares test for manual dexterity in people with Parkinson’s disease 2019 an international journal Amsterdam [u.a.] (DE-627)ELV003073483 volume:119 year:2020 pages:0 https://doi.org/10.1016/j.rser.2019.109575 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA 44.90 Neurologie VZ 44.65 Chirurgie VZ AR 119 2020 0 |
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In this study, the historical and technical development and the current status of distributed (DTRT) and enhanced (ETRT) thermal response tests (TRT) are reviewed. The different test setups of these advanced TRT are critically assessed and future research questions are outlined. Advanced TRT use specific temperature measurement techniques for the depth-resolved determination of site-specific ground parameters that are required for an optimal design of borehole heat exchanger (BHE) fields. The depth-resolved determination of these thermal properties, such as effective thermal conductivities and thermal borehole resistances, is the key advantage in comparison to conventional TRT, promising economic benefits during the installation and operating phase of ground source heat pump (GSHP) systems. Various test setups exist which differ regarding the heating procedure, i.e. circulating heating fluid and heating wire, the temperature measurement technique, i.e. optical fiber and wireless probe, as well as in their suitability for parameter estimation. These advanced techniques can furthermore provide information about geological layers, fractured zones and groundwater influenced sections in the subsurface as well as inadequate backfilled zones along the borehole heat exchanger. Despite this, advanced TRT are reported in international literature only for a few locations and some test setups are purely theoretical without any practical demonstration. Uncertainties exist regarding the comparability of the test setups, the sensitivity of the measurement devices under test conditions, as well as the best evaluation procedure. Also, scarce information is available about the use beyond academic field and economic aspects in comparison to conventional TRT. Encouraging further research and a more extensive transfer of these promising techniques from academia to practice is therefore also the aim of this review. |
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In this study, the historical and technical development and the current status of distributed (DTRT) and enhanced (ETRT) thermal response tests (TRT) are reviewed. The different test setups of these advanced TRT are critically assessed and future research questions are outlined. Advanced TRT use specific temperature measurement techniques for the depth-resolved determination of site-specific ground parameters that are required for an optimal design of borehole heat exchanger (BHE) fields. The depth-resolved determination of these thermal properties, such as effective thermal conductivities and thermal borehole resistances, is the key advantage in comparison to conventional TRT, promising economic benefits during the installation and operating phase of ground source heat pump (GSHP) systems. Various test setups exist which differ regarding the heating procedure, i.e. circulating heating fluid and heating wire, the temperature measurement technique, i.e. optical fiber and wireless probe, as well as in their suitability for parameter estimation. These advanced techniques can furthermore provide information about geological layers, fractured zones and groundwater influenced sections in the subsurface as well as inadequate backfilled zones along the borehole heat exchanger. Despite this, advanced TRT are reported in international literature only for a few locations and some test setups are purely theoretical without any practical demonstration. Uncertainties exist regarding the comparability of the test setups, the sensitivity of the measurement devices under test conditions, as well as the best evaluation procedure. Also, scarce information is available about the use beyond academic field and economic aspects in comparison to conventional TRT. Encouraging further research and a more extensive transfer of these promising techniques from academia to practice is therefore also the aim of this review. |
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In this study, the historical and technical development and the current status of distributed (DTRT) and enhanced (ETRT) thermal response tests (TRT) are reviewed. The different test setups of these advanced TRT are critically assessed and future research questions are outlined. Advanced TRT use specific temperature measurement techniques for the depth-resolved determination of site-specific ground parameters that are required for an optimal design of borehole heat exchanger (BHE) fields. The depth-resolved determination of these thermal properties, such as effective thermal conductivities and thermal borehole resistances, is the key advantage in comparison to conventional TRT, promising economic benefits during the installation and operating phase of ground source heat pump (GSHP) systems. Various test setups exist which differ regarding the heating procedure, i.e. circulating heating fluid and heating wire, the temperature measurement technique, i.e. optical fiber and wireless probe, as well as in their suitability for parameter estimation. These advanced techniques can furthermore provide information about geological layers, fractured zones and groundwater influenced sections in the subsurface as well as inadequate backfilled zones along the borehole heat exchanger. Despite this, advanced TRT are reported in international literature only for a few locations and some test setups are purely theoretical without any practical demonstration. Uncertainties exist regarding the comparability of the test setups, the sensitivity of the measurement devices under test conditions, as well as the best evaluation procedure. Also, scarce information is available about the use beyond academic field and economic aspects in comparison to conventional TRT. Encouraging further research and a more extensive transfer of these promising techniques from academia to practice is therefore also the aim of this review. |
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