干旱区生态环境知识资源中心(Arid): Influence of moisture on heat transfer of ground heat exchangers in unsaturated soils

Arid

DOI	10.1016/j.renene.2022.04.073
	Influence of moisture on heat transfer of ground heat exchangers in unsaturated soils
	Li, Siyuan; Sun, Tiemeng; Du, Yufang; Li, Min
通讯作者	Li, M
来源期刊	RENEWABLE ENERGY
ISSN	0960-1481
EISSN	1879-0682
出版年	2022
卷号	193 页码:1177-1185
英文摘要	The applications of ground heat exchangers (GHEs) in arid and semi-arid zones require knowledge about the effects of moisture on heat transfer in the ground. To evaluate the influence of moisture, this study integrates a finite line-source model, a normalized thermal conductivity model, and a saturation degree model. A normalized temperature difference, defined as a temperature-difference ratio (TDR) of unsat-urated to saturated soils, is proposed to characterize the reduction in heat transfer of GHEs in unsatu-rated soils. The modeling results show that the effective thermal conductivity of soils increases with saturation degree in a nonlinear way, thus leading to the nonlinear effect of moisture on heat conduction of GHEs: the influence of moisture on heat transfer is more significant in low-moisture soils (S-l < 0.5) than that in high-moisture soils (S-l > 0.5). This result implies that the design length of borehole GHEs is highly sensitive to the degree of saturation in low-moisture soils. (C) 2022 Elsevier Ltd. All rights reserved.
英文关键词	Ground heat exchanger Moisture Unsaturated soils Ground heat storage Ground -coupled heat pump
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000838298200014
WOS关键词	THERMAL-CONDUCTIVITY ; PUMP SYSTEMS ; PERFORMANCE ; MODEL ; TIME
WOS类目	Green & Sustainable Science & Technology ; Energy & Fuels
WOS研究方向	Science & Technology - Other Topics ; Energy & Fuels
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/394267
推荐引用方式 GB/T 7714	Li, Siyuan,Sun, Tiemeng,Du, Yufang,et al. Influence of moisture on heat transfer of ground heat exchangers in unsaturated soils[J],2022,193:1177-1185.
APA	Li, Siyuan,Sun, Tiemeng,Du, Yufang,&Li, Min.(2022).Influence of moisture on heat transfer of ground heat exchangers in unsaturated soils.RENEWABLE ENERGY,193,1177-1185.
MLA	Li, Siyuan,et al."Influence of moisture on heat transfer of ground heat exchangers in unsaturated soils".RENEWABLE ENERGY 193(2022):1177-1185.