METHOD OF EXTRACTING ENERGY FROM A CAVITY CREATED BY MINING OPERATIONS
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United States of America Patent
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app pub date -
Feb 22, 2013
filing date -
Feb 22, 2012
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Abstract
An energy-extracting mine ventilation system comprises: a ventilation unit for conditioning the intake air of a mine; a network of pipes installed in at least one cavity of the mine, the network of pipes comprising a geothermal fluid circulating therethrough wherein the network is in contact with a minefill material within the cavity and a rock mass; wherein the minefill material transfers energy between the rock mass of the at least one cavity and the thermal fluid; and a heat exchanger unit in fluid communication with the network of pipes and extracting the energy from the thermal fluid The heat exchanger unit is configured to transfer extracted energy directly or indirectly to the ventilation unit in order to condition the intake air of the mine, The extracted energy can be used in a variety of other applications, such as district heating, acid leaching, and water heating.
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