干旱区生态环境知识资源中心(Arid): Thermal conductivity of sands treated with microbially induced calcite precipitation (MICP) and model prediction

Arid

DOI	10.1016/j.ijheatmasstransfer.2019.118899
	Thermal conductivity of sands treated with microbially induced calcite precipitation (MICP) and model prediction
	Wang, Zhaoyu 1; Zhang, Nan 2; Ding, Jinhua 3; Li, Qi 4; Xu, Junhao 1
通讯作者	Zhang, Nan
来源期刊	INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
ISSN	0017-9310
EISSN	1879-2189
出版年	2020
卷号	147
英文摘要	Thermal resistance between underground energy geo-structures and surrounding soils limits heat exchange efficiency particularly when soils are at low saturation degrees or nearly dry conditions. Microbially induced calcite precipitation (MICP) technique has great potential to enhance soil thermal properties thus increasing the possibility to expand geothermal applications to arid environments. This study investigates the thermal conductivity (k) of MICP treated sands in drying process by using a newly developed dual probe heat pulse (DPHP) sensor. The results show that thermal conductivity of sands was significantly improved after MICP treatment, and k value increased as the number of treatment cycles increased. The improvement in k is attributed to the MICP induced CaCO3 crystals functioning as thermal bridges among sand grains, which provides more highly effective heat transfer path and increases surface contact area in heat exchange process. Based on the normalized thermal conductivity (k(r)) concept and the experimental data obtained in this study, a modified thermal conductivity predictive model was proposed for MICP treated sands. The model prediction matched the experimental results very well, and the predicted values of k agreed with the measured values with only 10% deviation in the entire saturation range. (C) 2019 Elsevier Ltd. All rights reserved.
英文关键词	Thermal conductivity Sands MICP
类型	Article
语种	英语
国家	Peoples R China ; USA
收录类别	SCI-E
WOS记录号	WOS:000505101200075
WOS关键词	SOIL-WATER CONTENT ; HEAT-PULSE-METHOD ; CARBONATE PRECIPITATION ; PROBE ; ERROR ; TDR
WOS类目	Thermodynamics ; Engineering, Mechanical ; Mechanics
WOS研究方向	Thermodynamics ; Engineering ; Mechanics
EI主题词	2020-02-01
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/312685
作者单位	1.Yancheng Inst Technol, Coll Civil Engn, Yancheng 224051, Jiangsu, Peoples R China; 2.Univ Texas Arlington, Dept Civil Engn, Arlington, TX 76019 USA; 3.Jiangsu Univ Sci & Technol, Coll Civil Engn, Zhenjiang 212003, Jiangsu, Peoples R China; 4.Xian Univ Architecture & Technol, Sch Architecture, Xian 710055, Shanxi, Peoples R China
推荐引用方式 GB/T 7714	Wang, Zhaoyu,Zhang, Nan,Ding, Jinhua,et al. Thermal conductivity of sands treated with microbially induced calcite precipitation (MICP) and model prediction[J],2020,147.
APA	Wang, Zhaoyu,Zhang, Nan,Ding, Jinhua,Li, Qi,&Xu, Junhao.(2020).Thermal conductivity of sands treated with microbially induced calcite precipitation (MICP) and model prediction.INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER,147.
MLA	Wang, Zhaoyu,et al."Thermal conductivity of sands treated with microbially induced calcite precipitation (MICP) and model prediction".INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER 147(2020).