Knowledge Management System Of Guangzhou Institute of Energy Conversion, CAS
| A novel enhanced deep borehole heat exchanger for building heating | |
He, Yujiang1,2; Bu, Xianbiao3
| |
| 2020-09-01 | |
| Source Publication | APPLIED THERMAL ENGINEERING
 |
| ISSN | 1359-4311 |
| Volume | 178Pages:6 |
| Corresponding Author | Bu, Xianbiao(buxb@ms.giec.ac.cn) |
| Abstract | 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. |
| Keyword | Enhanced deep borehole heat exchanger Geothermal heating Composite filler Filler leakage Leakage formation Graphene |
| DOI | 10.1016/j.applthermaleng.2020.115643 |
| WOS Keyword | ABANDONED OIL-WELLS ; GEOTHERMAL-ENERGY ; SYSTEM ; SIMULATION ; EXTRACTION ; EGS |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Natural Science Foundation of China[41972314] |
| WOS Research Area | Thermodynamics ; Energy & Fuels ; Engineering ; Mechanics |
| Funding Organization | National Natural Science Foundation of China |
| WOS Subject | Thermodynamics ; Energy & Fuels ; Engineering, Mechanical ; Mechanics |
| WOS ID | WOS:000552131100114 |
| Publisher | PERGAMON-ELSEVIER SCIENCE LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.giec.ac.cn/handle/344007/27506 |
| Collection | 中国科学院广州能源研究所 |
| Corresponding Author | Bu, Xianbiao |
| Affiliation | 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 |
| Recommended Citation 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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