Improvement in modelling of heat transfer in vertical ground heat exchangers.
Author(s) : DIAO N. R., ZENG H. Y., FANG Z. H.
Type of article: Article
Summary
The heat transfer model of vertical ground heat exchangers for ground-source heat pump systems is discussed. An explicite solution of a finite line-source model has been derived to better describe temperature response of boreholes for long time steps, which can be easily incorporated into computer programs for thermal analysis of ground heat exchangers. A quasi-three-dimensional model is also presented for heat transfer inside the borehole, accounting for thermal interference between the U-tube legs. On this basis a concise expression is obtained for the thermal resistance inside the borehole. These models have a more solid theoretical basis, would help to improve design procedures recommended by available literature, and are yet suitable for engineering applications.
Details
- Original title: Improvement in modelling of heat transfer in vertical ground heat exchangers.
- Record ID : 2005-2802
- Languages: English
- Source: HVAC&R Research - vol. 10 - n. 4
- Publication date: 2004/10
Links
See other articles in this issue (7)
See the source
Indexing
- Themes: Heat pumps, energy recovery: general information
- Keywords: Ground-water; Heat transfer; Ground; Heat pump; Modelling; Heat exchanger
-
Il terreno come sorgente termica: metodi e mode...
- Author(s) : CARLI M. de, DEL BIANCO R., FELLIN F., et al.
- Date : 2004/07
- Languages : Italian
- Source: Cond. Aria - n. 7
View record
-
Heat transfer characteristics of a multiple bor...
- Author(s) : ZHANG Q., MURPHY W. E.
- Date : 2003/08/17
- Languages : English
- Source: 21st IIR International Congress of Refrigeration: Serving the Needs of Mankind.
- Formats : PDF
View record
-
MODEL VALIDATION FOR 3 GROUND-COUPLED HEAT PUMPS.
- Author(s) : MOHAMMAD-ZADEN Y., JOHNSON R. R., EDWARDS J. A.
- Date : 1989
- Languages : English
View record
-
Evaluation des risques de gel à une profondeur ...
- Author(s) : DIDIER G.
- Date : 2003/07
- Languages : French
- Source: Chaud Froid Plomb. - n. 659
View record
-
Closed-loop ground-coupled heat pump systems.
- Author(s) : BERNIER M. A.
- Date : 2006/09
- Languages : English
- Source: ASHRAE Journal - vol. 48 - n. 9
View record