Experimental investigations on the thermal performance of a novel ground heat exchanger under the synergistic effects of shape-stabilized phase change material and nanofluid

Qinggong Liu, Yao Tao, Long Shi, Yi Huang, Yuanling Peng, Yong Wang and Jiyuan Tu

Energy, 2023, vol. 284, issue C

Abstract: Ground source heat pump (GSHP) is known as the most promising green energy utilization technology in the 21st century. However, the heat transfer efficiency of GSHP systems cannot be significantly improved owing to the limitations of heat transfer fluid and surrounding backfill material, which has become a major obstacle to the widespread application of the system. In this paper, efforts had been made to enhance the heat transfer performance of the ground heat exchanger (GHE) under the joint actions of structure and material. For this purpose, an experimental platform for horizontal spiral-coil GHE was built to study the synergistic effects of using shape-stabilized phase change material (SSPCM) as backfilling and CuO/water nanofluid as the heat transfer fluid on thermal performance of the GHE. The results showed that the heat transfer amount increased by 69.9% and the thermal resistance decreased by 81.77% under the synergistic effects of SSPCM and nanofluid. The ground thermal influence radius with SSPCM backfill was about 80% of that with sand backfill. Nanofluid and SSPCM promote and reinforce each other. The performance improvement effect was more significant under the synergistic effects of SSPCM and nanofluid. The findings of this study can help designer to develop high-efficiency GHE.

Keywords: Horizontal spiral-coil ground heat exchanger; Nanofluid; Heat transfer performance; Shape-stabilized phase change material (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0360544223020297
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:284:y:2023:i:c:s0360544223020297

DOI: 10.1016/j.energy.2023.128635

Access Statistics for this article

Energy is currently edited by Henrik Lund and Mark J. Kaiser

More articles in Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().