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A novel enhanced deep borehole heat exchanger for building heating
He, Yujiang1,2; Bu, Xianbiao3
2020-09-01
发表期刊APPLIED THERMAL ENGINEERING
ISSN1359-4311
卷号178页码:6
通讯作者Bu, Xianbiao(buxb@ms.giec.ac.cn)
摘要Deep borehole heat exchanger (DBHE) technology can be used in various regions due to without dependence on the hot water reservoir. However, its performance can hardly be improved due to poor thermal conductivity of rocks and cement. Here a novel enhanced deep borehole heat exchanger (EDBHE) is first proposed, which applies composite filler, cement and well tube. To depress thermal resistance, graphene is used to mix with ordinary mud and cement respectively to prepare composite filler and composite cement. Especially composite filler is controlled deliberately to flow into leakage formation by adjusting its density, viscosity and back pressure in order to improve the thermal conductivity of surrounding rocks. We find that the extracted thermal output from EDBHE is 1002.34 kW, which is 2.36 times that of DBHE (424.45 kW). EDBHE can be used in low water output zone and difficult recharge zone even dry hole zone with leakage formation, which will increase geothermal heating area substantially.
关键词Enhanced deep borehole heat exchanger Geothermal heating Composite filler Filler leakage Leakage formation Graphene
DOI10.1016/j.applthermaleng.2020.115643
关键词[WOS]ABANDONED OIL-WELLS ; GEOTHERMAL-ENERGY ; SYSTEM ; SIMULATION ; EXTRACTION ; EGS
收录类别SCI
语种英语
资助项目National Natural Science Foundation of China[41972314]
WOS研究方向Thermodynamics ; Energy & Fuels ; Engineering ; Mechanics
项目资助者National Natural Science Foundation of China
WOS类目Thermodynamics ; Energy & Fuels ; Engineering, Mechanical ; Mechanics
WOS记录号WOS:000552131100114
出版者PERGAMON-ELSEVIER SCIENCE LTD
引用统计
被引频次:24[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.giec.ac.cn/handle/344007/27506
专题中国科学院广州能源研究所
通讯作者Bu, Xianbiao
作者单位1.Chinese Acad Geol Sci, Inst Hydrogeol & Environm Geol, Shijiazhuang 050061, Hebei, Peoples R China
2.Minist Nat Resources, Technol Innovat Ctr Geothermal & Hot Dry Rock Exp, Shijiazhuang 050061, Hebei, Peoples R China
3.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Peoples R China
推荐引用方式
GB/T 7714
He, Yujiang,Bu, Xianbiao. A novel enhanced deep borehole heat exchanger for building heating[J]. APPLIED THERMAL ENGINEERING,2020,178:6.
APA He, Yujiang,&Bu, Xianbiao.(2020).A novel enhanced deep borehole heat exchanger for building heating.APPLIED THERMAL ENGINEERING,178,6.
MLA He, Yujiang,et al."A novel enhanced deep borehole heat exchanger for building heating".APPLIED THERMAL ENGINEERING 178(2020):6.
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