Résumé
The imbalance between heat injection and extraction from and to the ground has been a prime focus in most ground source heat pump (GSHP) applications. Based on the calculation of the hourly cooling and heating loads of buildings, numerical simulation of the heat-transfer behaviour of the ground surrounding large-area compact U-shaped pile-buried heat exchangers has been carried out. The concept of heat barrier (HB) during heat transfer has been presented and further characteristics including random movement, dynamic shape and potential harmfulness have been analyzed. During the long-term operation of GSHP system, the growth rate of HB temperature is higher than that of average ground temperature, which may lead to the soil's peak temperature and sometimes affect short-term operation of heat pump units. Both energy equilibrium and HB analysis should be taken into account in order to guarantee the stability and reliability of GSHP systems.
Détails
- Titre original : Numerical study on the ground temperature field around large-area compact U-shaped pile-buried heat exchangers.
- Identifiant de la fiche : 2007-0851
- Langues : Anglais
- Source : ACRA-2006. Proceedings of the 3rd Asian conference on refrigeration and air conditioning.
- Date d'édition : 21/05/2006
Liens
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Indexation
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Thèmes :
Techniques des pompes à chaleur;
Transfert de chaleur - Mots-clés : Sol-eau; Fondation; Transfert de chaleur; Sol-air; Sol; Pompe à chaleur; Modélisation; Échangeur de chaleur
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Simulation model for ground loop heat exchangers.
- Auteurs : YAVUZTURK C., CHIASSON A. D., NYDAHL J. E.
- Date : 21/06/2009
- Langues : Anglais
- Source : 2009 ASHRAE Annual Conference CD. Transactions papers presented at the 2009 ASHRAE Annual Conference: Louisville, KY, June 2009. Volume 115, part 2.
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Ground heat exchanger temperature distribution ...
- Auteurs : BI Y., CHEN L., WU C.
- Date : 02/2002
- Langues : Anglais
- Source : Applied Thermal Engineering - vol. 22 - n. 2
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Numerical simulation of ground heat and water t...
- Auteurs : NAM Y., OOKA R.
- Date : 20/05/2008
- Langues : Anglais
- Source : 9th IEA Heat Pump Conference 2008: advances and prospects in technology, applications and markets. Conference proceedings [CD-ROM + abstracts].
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Transfert de chaleur d'un échangeur de chaleur ...
- Auteurs : YUAN Y., LEI B., YU N., et al.
- Date : 04/2008
- Langues : Chinois
- Source : HV & AC - vol. 38 - n. 210
- Formats : PDF
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Transfert de chaleur d'un échangeur de chaleur ...
- Auteurs : YUAN Y., LEI B., YU N., et al.
- Date : 06/2009
- Langues : Chinois
- Source : HV & AC - vol. 39 - n. 226
- Formats : PDF
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