Bayramoglu Law Offices LLC
Method for extracting thermal energy in underground high temperature area of coalfield fire area
A method for extracting thermal energy in an underground high temperature area of a coalfield fire area, including: determining a thermal extraction target area by a natural potential method and a ground detecting borehole; using an injection borehole to send a gaseous thermal medium to an underground high temperature area of the thermal extraction target area; after the thermal exchange between the gaseous thermal medium and a high temperature coal rock mass, the gaseous thermal medium is extracted through an extraction borehole; continuously monitoring a natural potential of the thermal extraction target area; arranging a casing-type borehole thermal exchanger in a potential anomaly region to complete the thermal exchange between the high temperature coal rocks and a liquid thermal medium; stopping the thermal extraction operations when the temperatures of the extracted gaseous thermal medium and the liquid thermal medium reach 70° C. or below.
CHANGZHOU UNIVERSITY CHINA UNIVERSITY OF MINING AND TECHNOLOGY
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F24T F24T Y02E F24T F24T F24T
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Guangyu Xinhao Deming Fei He Xiaoxing Yan
Li Zhang Wang Hou Zhu Zhong Tang