GUOHUI GAN GUOHUI.GAN@NOTTINGHAM.AC.UK
Associate Professor
Dynamic thermal performance of horizontal ground source heat pumps - The impact of coupled heat and moisture transfer
Gan, Guohui
Authors
Abstract
A ground heat exchanger is a key component of a ground source heat pump system, and heat and moisture transfer occurs simultaneously in soil with a horizontal ground heat exchanger in operation. A new method has been developed to generate moisture and temperature profiles in soil with spatially and temporally varying properties. The profiles are used as initial data for accurate solution of the equations for transient heat and moisture transfer in soil containing a buried horizontal ground heat exchanger. The impacts of initial conditions of soil and coupled heat and moisture transfer are assessed on the thermal performance of a horizontal ground heat exchanger for a ground source heat pump for different installation depths and soil textures. Seasonal heat transfer through a horizontal heat exchanger increases with installation depth and a heat exchanger installed at 2 m deep can transfer 19% more heat than that at 1 m deep. Heat transfer in sandy soil is 17% higher than in loamy sand soil which is 14.5% higher than in clay loam soil. The maximum differences between models with and without moisture transfer for the prediction of heat transfer through a heat exchanger are 24%, 17% and 18% in clay sand, loamy sand and sandy soils, respectively. In conclusion, it is necessary to use a coupled heat and moisture transfer model in order to predict accurately the seasonal thermal performance of a ground heat exchanger in shallow ground.
Citation
Gan, G. (2018). Dynamic thermal performance of horizontal ground source heat pumps - The impact of coupled heat and moisture transfer. Energy, 152, https://doi.org/10.1016/j.energy.2018.04.008
Journal Article Type | Article |
---|---|
Acceptance Date | Apr 2, 2018 |
Online Publication Date | Apr 3, 2018 |
Publication Date | Jun 1, 2018 |
Deposit Date | Apr 12, 2018 |
Publicly Available Date | Apr 4, 2019 |
Journal | Energy |
Print ISSN | 0360-5442 |
Electronic ISSN | 1873-6785 |
Publisher | Elsevier |
Peer Reviewed | Peer Reviewed |
Volume | 152 |
DOI | https://doi.org/10.1016/j.energy.2018.04.008 |
Keywords | Ground heat exchanger; heat and moisture transfer; ground-source heat pump; seasonal performance; spatiotemporal variation; soil properties |
Public URL | https://nottingham-repository.worktribe.com/output/935317 |
Publisher URL | https://www.sciencedirect.com/science/article/pii/S036054421830598X |
Contract Date | Apr 12, 2018 |
Files
acceptedManuscript.pdf
(1.2 Mb)
PDF
Copyright Statement
Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by-nc-nd/4.0
You might also like
Dynamic thermal simulation of ground heat exchangers for renewable heating of buildings
(2016)
Presentation / Conference Contribution
Feasibility of double-skin façades for multi-storeys office buildings in Amman/Jordan: an insight into thermal performance for both summer and winter peak conditions
(2017)
Presentation / Conference Contribution
Downloadable Citations
About Repository@Nottingham
Administrator e-mail: discovery-access-systems@nottingham.ac.uk
This application uses the following open-source libraries:
SheetJS Community Edition
Apache License Version 2.0 (http://www.apache.org/licenses/)
PDF.js
Apache License Version 2.0 (http://www.apache.org/licenses/)
Font Awesome
SIL OFL 1.1 (http://scripts.sil.org/OFL)
MIT License (http://opensource.org/licenses/mit-license.html)
CC BY 3.0 ( http://creativecommons.org/licenses/by/3.0/)
Powered by Worktribe © 2024
Advanced Search