Underground Hydro-Pumped Energy Storage Using Coal Mine Goafs: System Performance Analysis and a Case Study for China
In response to the Paris climate agreement, the Chinese government has taken actions to improve the energy structure by reducing the share of coal-fired thermal power and increasing the use of clean energy. However, due to the extreme shortage of large-scale energy storage facilities, the utilizatio...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2021-11-01
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| Series: | Frontiers in Earth Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/feart.2021.760464/full |
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| author | Deyi Jiang Deyi Jiang Shao Chen Shao Chen Shao Chen Wenhao Liu Wenhao Liu Yiwei Ren Yiwei Ren Pengyv Guo Pengyv Guo Zongze Li Zongze Li |
| author_facet | Deyi Jiang Deyi Jiang Shao Chen Shao Chen Shao Chen Wenhao Liu Wenhao Liu Yiwei Ren Yiwei Ren Pengyv Guo Pengyv Guo Zongze Li Zongze Li |
| author_sort | Deyi Jiang |
| collection | DOAJ |
| description | In response to the Paris climate agreement, the Chinese government has taken actions to improve the energy structure by reducing the share of coal-fired thermal power and increasing the use of clean energy. However, due to the extreme shortage of large-scale energy storage facilities, the utilization efficiency of wind and solar power remains low. This paper proposes to use abandoned coal mine goafs serving as large-scale pumped hydro storage (PHS) reservoir. In this paper, suitability of coal mine goafs as PHS underground reservoirs was analyzed with respects to the storage capacity, usable capacity, and ventilation between goaf and outside. The storage capacity is 1.97 × 106 m3 for a typical mining area with an extent of 3 × 5 km2 and a coal seam thickness of 6 m. A typical goaf-PHS system with the energy type αw=0.74 has a performance of 82.8% in the case of annual operation, able to regulate solar-wind energy with an average value of 275 kW. The performance of the proposed goaf-PHS system was analyzed based on the reservoir estimation and meteorological information from a typical region in China. It has been found that using abandoned coal mine goafs to develop PHS plants is technically feasible in wind and solar-rich northwestern and southwestern China. |
| first_indexed | 2024-12-20T19:21:18Z |
| format | Article |
| id | doaj.art-19a572d58ed24a1a985739bb7b42c79b |
| institution | Directory Open Access Journal |
| issn | 2296-6463 |
| language | English |
| last_indexed | 2024-12-20T19:21:18Z |
| publishDate | 2021-11-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Earth Science |
| spelling | doaj.art-19a572d58ed24a1a985739bb7b42c79b2022-12-21T19:28:58ZengFrontiers Media S.A.Frontiers in Earth Science2296-64632021-11-01910.3389/feart.2021.760464760464Underground Hydro-Pumped Energy Storage Using Coal Mine Goafs: System Performance Analysis and a Case Study for ChinaDeyi Jiang0Deyi Jiang1Shao Chen2Shao Chen3Shao Chen4Wenhao Liu5Wenhao Liu6Yiwei Ren7Yiwei Ren8Pengyv Guo9Pengyv Guo10Zongze Li11Zongze Li12State Key Laboratory of the Coal Mine Disaster Dynamics and Controls, Chongqing University, Chongqing, ChinaSchool of Resources and Safety Engineering, Chongqing University, Chongqing, ChinaState Key Laboratory of the Coal Mine Disaster Dynamics and Controls, Chongqing University, Chongqing, ChinaSchool of Resources and Safety Engineering, Chongqing University, Chongqing, ChinaShaanxi Energy Investment Co., Ltd., Coal Industry Branch, Shanxi, ChinaState Key Laboratory of the Coal Mine Disaster Dynamics and Controls, Chongqing University, Chongqing, ChinaSchool of Resources and Safety Engineering, Chongqing University, Chongqing, ChinaState Key Laboratory of the Coal Mine Disaster Dynamics and Controls, Chongqing University, Chongqing, ChinaSchool of Resources and Safety Engineering, Chongqing University, Chongqing, ChinaState Key Laboratory of the Coal Mine Disaster Dynamics and Controls, Chongqing University, Chongqing, ChinaSchool of Resources and Safety Engineering, Chongqing University, Chongqing, ChinaState Key Laboratory of the Coal Mine Disaster Dynamics and Controls, Chongqing University, Chongqing, ChinaSchool of Resources and Safety Engineering, Chongqing University, Chongqing, ChinaIn response to the Paris climate agreement, the Chinese government has taken actions to improve the energy structure by reducing the share of coal-fired thermal power and increasing the use of clean energy. However, due to the extreme shortage of large-scale energy storage facilities, the utilization efficiency of wind and solar power remains low. This paper proposes to use abandoned coal mine goafs serving as large-scale pumped hydro storage (PHS) reservoir. In this paper, suitability of coal mine goafs as PHS underground reservoirs was analyzed with respects to the storage capacity, usable capacity, and ventilation between goaf and outside. The storage capacity is 1.97 × 106 m3 for a typical mining area with an extent of 3 × 5 km2 and a coal seam thickness of 6 m. A typical goaf-PHS system with the energy type αw=0.74 has a performance of 82.8% in the case of annual operation, able to regulate solar-wind energy with an average value of 275 kW. The performance of the proposed goaf-PHS system was analyzed based on the reservoir estimation and meteorological information from a typical region in China. It has been found that using abandoned coal mine goafs to develop PHS plants is technically feasible in wind and solar-rich northwestern and southwestern China.https://www.frontiersin.org/articles/10.3389/feart.2021.760464/fullpumped hydro storageclean energycoal minesfeasibility analysiscase study |
| spellingShingle | Deyi Jiang Deyi Jiang Shao Chen Shao Chen Shao Chen Wenhao Liu Wenhao Liu Yiwei Ren Yiwei Ren Pengyv Guo Pengyv Guo Zongze Li Zongze Li Underground Hydro-Pumped Energy Storage Using Coal Mine Goafs: System Performance Analysis and a Case Study for China Frontiers in Earth Science pumped hydro storage clean energy coal mines feasibility analysis case study |
| title | Underground Hydro-Pumped Energy Storage Using Coal Mine Goafs: System Performance Analysis and a Case Study for China |
| title_full | Underground Hydro-Pumped Energy Storage Using Coal Mine Goafs: System Performance Analysis and a Case Study for China |
| title_fullStr | Underground Hydro-Pumped Energy Storage Using Coal Mine Goafs: System Performance Analysis and a Case Study for China |
| title_full_unstemmed | Underground Hydro-Pumped Energy Storage Using Coal Mine Goafs: System Performance Analysis and a Case Study for China |
| title_short | Underground Hydro-Pumped Energy Storage Using Coal Mine Goafs: System Performance Analysis and a Case Study for China |
| title_sort | underground hydro pumped energy storage using coal mine goafs system performance analysis and a case study for china |
| topic | pumped hydro storage clean energy coal mines feasibility analysis case study |
| url | https://www.frontiersin.org/articles/10.3389/feart.2021.760464/full |
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