A new analytical model for short-time analysis of energy piles and its application

An energy pile is a special form of vertical ground heat exchanger that couples the roles of structural support and heat transfer. Modeling the transient heat transfer process inside an energy pile has importance; however, available analytical models either have insufficient calculation accuracy or...
Ausführliche Beschreibung

Gespeichert in:

Autor*in:	Lan, Jian [verfasserIn] Lei, Fei [verfasserIn] Hu, Pingfang [verfasserIn] Zhu, Na [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2020

Schlagwörter:	Ground heat exchanger Energy pile Short time response Thermal response testing

Übergeordnetes Werk:	Enthalten in: Energy and buildings - Amsterdam [u.a.] : Elsevier Science, 1977, 224
Übergeordnetes Werk:	volume:224

DOI / URN:	10.1016/j.enbuild.2020.110221

Katalog-ID:	ELV004624688

Internformat


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520			\|a An energy pile is a special form of vertical ground heat exchanger that couples the roles of structural support and heat transfer. Modeling the transient heat transfer process inside an energy pile has importance; however, available analytical models either have insufficient calculation accuracy or are computationally demanding. Based on three existing models, this paper proposes a novel short-term hybrid composite-medium line-source (HCMLS) model, which is not only efficient in computation but also more accurate than most traditional analytical models. The model is suitable for ground heat exchangers of various radii. Comparisons between the hybrid analytical model and a numerical model are made for energy pile cases with different parameters, including the thermal properties, borehole radii, relative positions of tubes, and number of tubes. In general, the hybrid composite-medium line-source model gives credible prediction after 100 min. The new model is further validated by the infinite composite-medium line-source (ICMLS) model, which is currently the most theoretically complete short-term model. Moreover, the new model is applied to thermal response tests (TRTs). The least dimensionless test duration for interpretations based on the modified hybrid composite-medium line-source (C-HCMLS) solution is Fo > 1.7. This study renders the application of in situ TRTs to energy piles with large diameters feasible.
650		4	\|a Ground heat exchanger
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publishDate	2020
allfields	10.1016/j.enbuild.2020.110221 doi (DE-627)ELV004624688 (ELSEVIER)S0378-7788(19)33761-2 DE-627 ger DE-627 rda eng 690 DE-600 52.42 bkl 56.50 bkl 56.55 bkl 56.65 bkl Lan, Jian verfasserin aut A new analytical model for short-time analysis of energy piles and its application 2020 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier An energy pile is a special form of vertical ground heat exchanger that couples the roles of structural support and heat transfer. Modeling the transient heat transfer process inside an energy pile has importance; however, available analytical models either have insufficient calculation accuracy or are computationally demanding. Based on three existing models, this paper proposes a novel short-term hybrid composite-medium line-source (HCMLS) model, which is not only efficient in computation but also more accurate than most traditional analytical models. The model is suitable for ground heat exchangers of various radii. Comparisons between the hybrid analytical model and a numerical model are made for energy pile cases with different parameters, including the thermal properties, borehole radii, relative positions of tubes, and number of tubes. In general, the hybrid composite-medium line-source model gives credible prediction after 100 min. The new model is further validated by the infinite composite-medium line-source (ICMLS) model, which is currently the most theoretically complete short-term model. Moreover, the new model is applied to thermal response tests (TRTs). The least dimensionless test duration for interpretations based on the modified hybrid composite-medium line-source (C-HCMLS) solution is Fo > 1.7. This study renders the application of in situ TRTs to energy piles with large diameters feasible. Ground heat exchanger Energy pile Short time response Thermal response testing Lei, Fei verfasserin aut Hu, Pingfang verfasserin aut Zhu, Na verfasserin aut Enthalten in Energy and buildings Amsterdam [u.a.] : Elsevier Science, 1977 224 Online-Ressource (DE-627)308448030 (DE-600)1502295-X (DE-576)094752532 nnns volume:224 GBV_USEFLAG_U SYSFLAG_U GBV_ELV GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2008 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 52.42 Heizungstechnik Lüftungstechnik Klimatechnik 56.50 Technischer Ausbau 56.55 Bauphysik Bautenschutz 56.65 Bauökologie Baubiologie AR 224
spelling	10.1016/j.enbuild.2020.110221 doi (DE-627)ELV004624688 (ELSEVIER)S0378-7788(19)33761-2 DE-627 ger DE-627 rda eng 690 DE-600 52.42 bkl 56.50 bkl 56.55 bkl 56.65 bkl Lan, Jian verfasserin aut A new analytical model for short-time analysis of energy piles and its application 2020 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier An energy pile is a special form of vertical ground heat exchanger that couples the roles of structural support and heat transfer. Modeling the transient heat transfer process inside an energy pile has importance; however, available analytical models either have insufficient calculation accuracy or are computationally demanding. Based on three existing models, this paper proposes a novel short-term hybrid composite-medium line-source (HCMLS) model, which is not only efficient in computation but also more accurate than most traditional analytical models. The model is suitable for ground heat exchangers of various radii. Comparisons between the hybrid analytical model and a numerical model are made for energy pile cases with different parameters, including the thermal properties, borehole radii, relative positions of tubes, and number of tubes. In general, the hybrid composite-medium line-source model gives credible prediction after 100 min. The new model is further validated by the infinite composite-medium line-source (ICMLS) model, which is currently the most theoretically complete short-term model. Moreover, the new model is applied to thermal response tests (TRTs). The least dimensionless test duration for interpretations based on the modified hybrid composite-medium line-source (C-HCMLS) solution is Fo > 1.7. This study renders the application of in situ TRTs to energy piles with large diameters feasible. Ground heat exchanger Energy pile Short time response Thermal response testing Lei, Fei verfasserin aut Hu, Pingfang verfasserin aut Zhu, Na verfasserin aut Enthalten in Energy and buildings Amsterdam [u.a.] : Elsevier Science, 1977 224 Online-Ressource (DE-627)308448030 (DE-600)1502295-X (DE-576)094752532 nnns volume:224 GBV_USEFLAG_U SYSFLAG_U GBV_ELV GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2008 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 52.42 Heizungstechnik Lüftungstechnik Klimatechnik 56.50 Technischer Ausbau 56.55 Bauphysik Bautenschutz 56.65 Bauökologie Baubiologie AR 224
allfields_unstemmed	10.1016/j.enbuild.2020.110221 doi (DE-627)ELV004624688 (ELSEVIER)S0378-7788(19)33761-2 DE-627 ger DE-627 rda eng 690 DE-600 52.42 bkl 56.50 bkl 56.55 bkl 56.65 bkl Lan, Jian verfasserin aut A new analytical model for short-time analysis of energy piles and its application 2020 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier An energy pile is a special form of vertical ground heat exchanger that couples the roles of structural support and heat transfer. Modeling the transient heat transfer process inside an energy pile has importance; however, available analytical models either have insufficient calculation accuracy or are computationally demanding. Based on three existing models, this paper proposes a novel short-term hybrid composite-medium line-source (HCMLS) model, which is not only efficient in computation but also more accurate than most traditional analytical models. The model is suitable for ground heat exchangers of various radii. Comparisons between the hybrid analytical model and a numerical model are made for energy pile cases with different parameters, including the thermal properties, borehole radii, relative positions of tubes, and number of tubes. In general, the hybrid composite-medium line-source model gives credible prediction after 100 min. The new model is further validated by the infinite composite-medium line-source (ICMLS) model, which is currently the most theoretically complete short-term model. Moreover, the new model is applied to thermal response tests (TRTs). The least dimensionless test duration for interpretations based on the modified hybrid composite-medium line-source (C-HCMLS) solution is Fo > 1.7. This study renders the application of in situ TRTs to energy piles with large diameters feasible. Ground heat exchanger Energy pile Short time response Thermal response testing Lei, Fei verfasserin aut Hu, Pingfang verfasserin aut Zhu, Na verfasserin aut Enthalten in Energy and buildings Amsterdam [u.a.] : Elsevier Science, 1977 224 Online-Ressource (DE-627)308448030 (DE-600)1502295-X (DE-576)094752532 nnns volume:224 GBV_USEFLAG_U SYSFLAG_U GBV_ELV GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2008 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 52.42 Heizungstechnik Lüftungstechnik Klimatechnik 56.50 Technischer Ausbau 56.55 Bauphysik Bautenschutz 56.65 Bauökologie Baubiologie AR 224
allfieldsGer	10.1016/j.enbuild.2020.110221 doi (DE-627)ELV004624688 (ELSEVIER)S0378-7788(19)33761-2 DE-627 ger DE-627 rda eng 690 DE-600 52.42 bkl 56.50 bkl 56.55 bkl 56.65 bkl Lan, Jian verfasserin aut A new analytical model for short-time analysis of energy piles and its application 2020 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier An energy pile is a special form of vertical ground heat exchanger that couples the roles of structural support and heat transfer. Modeling the transient heat transfer process inside an energy pile has importance; however, available analytical models either have insufficient calculation accuracy or are computationally demanding. Based on three existing models, this paper proposes a novel short-term hybrid composite-medium line-source (HCMLS) model, which is not only efficient in computation but also more accurate than most traditional analytical models. The model is suitable for ground heat exchangers of various radii. Comparisons between the hybrid analytical model and a numerical model are made for energy pile cases with different parameters, including the thermal properties, borehole radii, relative positions of tubes, and number of tubes. In general, the hybrid composite-medium line-source model gives credible prediction after 100 min. The new model is further validated by the infinite composite-medium line-source (ICMLS) model, which is currently the most theoretically complete short-term model. Moreover, the new model is applied to thermal response tests (TRTs). The least dimensionless test duration for interpretations based on the modified hybrid composite-medium line-source (C-HCMLS) solution is Fo > 1.7. This study renders the application of in situ TRTs to energy piles with large diameters feasible. Ground heat exchanger Energy pile Short time response Thermal response testing Lei, Fei verfasserin aut Hu, Pingfang verfasserin aut Zhu, Na verfasserin aut Enthalten in Energy and buildings Amsterdam [u.a.] : Elsevier Science, 1977 224 Online-Ressource (DE-627)308448030 (DE-600)1502295-X (DE-576)094752532 nnns volume:224 GBV_USEFLAG_U SYSFLAG_U GBV_ELV GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2008 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 52.42 Heizungstechnik Lüftungstechnik Klimatechnik 56.50 Technischer Ausbau 56.55 Bauphysik Bautenschutz 56.65 Bauökologie Baubiologie AR 224
allfieldsSound	10.1016/j.enbuild.2020.110221 doi (DE-627)ELV004624688 (ELSEVIER)S0378-7788(19)33761-2 DE-627 ger DE-627 rda eng 690 DE-600 52.42 bkl 56.50 bkl 56.55 bkl 56.65 bkl Lan, Jian verfasserin aut A new analytical model for short-time analysis of energy piles and its application 2020 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier An energy pile is a special form of vertical ground heat exchanger that couples the roles of structural support and heat transfer. Modeling the transient heat transfer process inside an energy pile has importance; however, available analytical models either have insufficient calculation accuracy or are computationally demanding. Based on three existing models, this paper proposes a novel short-term hybrid composite-medium line-source (HCMLS) model, which is not only efficient in computation but also more accurate than most traditional analytical models. The model is suitable for ground heat exchangers of various radii. Comparisons between the hybrid analytical model and a numerical model are made for energy pile cases with different parameters, including the thermal properties, borehole radii, relative positions of tubes, and number of tubes. In general, the hybrid composite-medium line-source model gives credible prediction after 100 min. The new model is further validated by the infinite composite-medium line-source (ICMLS) model, which is currently the most theoretically complete short-term model. Moreover, the new model is applied to thermal response tests (TRTs). The least dimensionless test duration for interpretations based on the modified hybrid composite-medium line-source (C-HCMLS) solution is Fo > 1.7. This study renders the application of in situ TRTs to energy piles with large diameters feasible. Ground heat exchanger Energy pile Short time response Thermal response testing Lei, Fei verfasserin aut Hu, Pingfang verfasserin aut Zhu, Na verfasserin aut Enthalten in Energy and buildings Amsterdam [u.a.] : Elsevier Science, 1977 224 Online-Ressource (DE-627)308448030 (DE-600)1502295-X (DE-576)094752532 nnns volume:224 GBV_USEFLAG_U SYSFLAG_U GBV_ELV GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2008 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 52.42 Heizungstechnik Lüftungstechnik Klimatechnik 56.50 Technischer Ausbau 56.55 Bauphysik Bautenschutz 56.65 Bauökologie Baubiologie AR 224
language	English
source	Enthalten in Energy and buildings 224 volume:224
sourceStr	Enthalten in Energy and buildings 224 volume:224
format_phy_str_mv	Article
bklname	Heizungstechnik Lüftungstechnik Klimatechnik Technischer Ausbau Bauphysik Bautenschutz Bauökologie Baubiologie
institution	findex.gbv.de
topic_facet	Ground heat exchanger Energy pile Short time response Thermal response testing
dewey-raw	690
isfreeaccess_bool	false
container_title	Energy and buildings
authorswithroles_txt_mv	Lan, Jian @@aut@@ Lei, Fei @@aut@@ Hu, Pingfang @@aut@@ Zhu, Na @@aut@@
publishDateDaySort_date	2020-01-01T00:00:00Z
hierarchy_top_id	308448030
dewey-sort	3690
id	ELV004624688
language_de	englisch
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author	Lan, Jian
spellingShingle	Lan, Jian ddc 690 bkl 52.42 bkl 56.50 bkl 56.55 bkl 56.65 misc Ground heat exchanger misc Energy pile misc Short time response misc Thermal response testing A new analytical model for short-time analysis of energy piles and its application
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topic_title	690 DE-600 52.42 bkl 56.50 bkl 56.55 bkl 56.65 bkl A new analytical model for short-time analysis of energy piles and its application Ground heat exchanger Energy pile Short time response Thermal response testing
topic	ddc 690 bkl 52.42 bkl 56.50 bkl 56.55 bkl 56.65 misc Ground heat exchanger misc Energy pile misc Short time response misc Thermal response testing
topic_unstemmed	ddc 690 bkl 52.42 bkl 56.50 bkl 56.55 bkl 56.65 misc Ground heat exchanger misc Energy pile misc Short time response misc Thermal response testing
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title	A new analytical model for short-time analysis of energy piles and its application
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title_full	A new analytical model for short-time analysis of energy piles and its application
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author_browse	Lan, Jian Lei, Fei Hu, Pingfang Zhu, Na
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title_sort	a new analytical model for short-time analysis of energy piles and its application
title_auth	A new analytical model for short-time analysis of energy piles and its application
abstract	An energy pile is a special form of vertical ground heat exchanger that couples the roles of structural support and heat transfer. Modeling the transient heat transfer process inside an energy pile has importance; however, available analytical models either have insufficient calculation accuracy or are computationally demanding. Based on three existing models, this paper proposes a novel short-term hybrid composite-medium line-source (HCMLS) model, which is not only efficient in computation but also more accurate than most traditional analytical models. The model is suitable for ground heat exchangers of various radii. Comparisons between the hybrid analytical model and a numerical model are made for energy pile cases with different parameters, including the thermal properties, borehole radii, relative positions of tubes, and number of tubes. In general, the hybrid composite-medium line-source model gives credible prediction after 100 min. The new model is further validated by the infinite composite-medium line-source (ICMLS) model, which is currently the most theoretically complete short-term model. Moreover, the new model is applied to thermal response tests (TRTs). The least dimensionless test duration for interpretations based on the modified hybrid composite-medium line-source (C-HCMLS) solution is Fo > 1.7. This study renders the application of in situ TRTs to energy piles with large diameters feasible.
abstractGer	An energy pile is a special form of vertical ground heat exchanger that couples the roles of structural support and heat transfer. Modeling the transient heat transfer process inside an energy pile has importance; however, available analytical models either have insufficient calculation accuracy or are computationally demanding. Based on three existing models, this paper proposes a novel short-term hybrid composite-medium line-source (HCMLS) model, which is not only efficient in computation but also more accurate than most traditional analytical models. The model is suitable for ground heat exchangers of various radii. Comparisons between the hybrid analytical model and a numerical model are made for energy pile cases with different parameters, including the thermal properties, borehole radii, relative positions of tubes, and number of tubes. In general, the hybrid composite-medium line-source model gives credible prediction after 100 min. The new model is further validated by the infinite composite-medium line-source (ICMLS) model, which is currently the most theoretically complete short-term model. Moreover, the new model is applied to thermal response tests (TRTs). The least dimensionless test duration for interpretations based on the modified hybrid composite-medium line-source (C-HCMLS) solution is Fo > 1.7. This study renders the application of in situ TRTs to energy piles with large diameters feasible.
abstract_unstemmed	An energy pile is a special form of vertical ground heat exchanger that couples the roles of structural support and heat transfer. Modeling the transient heat transfer process inside an energy pile has importance; however, available analytical models either have insufficient calculation accuracy or are computationally demanding. Based on three existing models, this paper proposes a novel short-term hybrid composite-medium line-source (HCMLS) model, which is not only efficient in computation but also more accurate than most traditional analytical models. The model is suitable for ground heat exchangers of various radii. Comparisons between the hybrid analytical model and a numerical model are made for energy pile cases with different parameters, including the thermal properties, borehole radii, relative positions of tubes, and number of tubes. In general, the hybrid composite-medium line-source model gives credible prediction after 100 min. The new model is further validated by the infinite composite-medium line-source (ICMLS) model, which is currently the most theoretically complete short-term model. Moreover, the new model is applied to thermal response tests (TRTs). The least dimensionless test duration for interpretations based on the modified hybrid composite-medium line-source (C-HCMLS) solution is Fo > 1.7. This study renders the application of in situ TRTs to energy piles with large diameters feasible.
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title_short	A new analytical model for short-time analysis of energy piles and its application
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author2	Lei, Fei Hu, Pingfang Zhu, Na
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up_date	2024-07-06T23:37:14.651Z
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A new analytical model for short-time analysis of energy piles and its application

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