Numerical analysis of minimum ground temperature for heat extraction in horizontal ground heat exchangers
Authors:
- Krystian Leski,
- Przemysław Luty,
- Monika Gwadera,
- Barbara Larwa
Abstract
In this work, numerical simulation calculations were performed to investigate the minimum ground temperature that occurs when extracting thermal energy in a horizontal ground heat exchanger system in the Central European climate. The influence of ground thermal conductivity, heat flux extracted from the ground, periodic interruptions in the operation of the heat exchanger, periodic supply of heat energy to the ground, relative humidity of the ambient air, evaporation rate coefficient, and convective heat transfer coefficient on the ground minimum temperature were investigated. Based on the simulation, it was found that the high value of ground thermal conductivity favorably affects the operation of the installation with a ground heat exchanger. Both the reduction of the maximum heat flux taken from the ground, as well as periodic interruptions in the operation of the exchanger effectively protects the ground against excessive cooling. Further, it was found that heat supply to the ground in summer only slightly raises its minimum temperature, as well as the decrease of the relative humidity of the ambient air and evaporation rate coefficient. The change of the convective heat transfer coefficient has no significant impact on the minimum annual ground temperature.
- Record ID
- CUT24f7b17699c7405e84feee35f5bb8e90
- Publication categories
- ;
- Author
- Journal series
- Energies, ISSN , e-ISSN 1996-1073, Biweekly
- Issue year
- 2021
- Vol
- 14
- No
- 17
- Pages
- [1-13]
- Article number
- 5487
- Other elements of collation
- tab.; wykr.; Bibliografia (na s.) - 13; Bibliografia (liczba pozycji) - 28; Oznaczenie streszczenia - Abstr.; Numeracja w czasopiśmie - Vol. 14, Iss. 17
- Substantive notes
- Section: Energy and Buildings
- Keywords in English
- ground temperature, heat extraction, ground heat exchanger, heat pump
- DOI
- DOI:10.3390/en14175487 Opening in a new tab
- URL
- https://www.mdpi.com/1996-1073/14/17/5487 Opening in a new tab
- Language
- eng (en) English
- License
- Score (nominal)
- 140
- Publication indicators
- = 7
- Additional fields
- Indeksowana w: Web of Science, Scopus
- Uniform Resource Identifier
- https://cris.pk.edu.pl/info/article/CUT24f7b17699c7405e84feee35f5bb8e90/
- URN
urn:pkr-prod:CUT24f7b17699c7405e84feee35f5bb8e90
* presented citation count is obtained through Internet information analysis, and it is close to the number calculated by the Publish or PerishOpening in a new tab system.