The Heshangzui Coal Mine Exhaust Air Heat Extraction Project is located in Datong, Shanxi Province. It is equipped with four two-stage heat extraction medium-temperature exhaust air heat pump units, two KLMK-STS/S-550/137 and two KLMK-STS/S-480/150, respectively. The water supply temperature is ≥ 50 ℃, which is used for wellhead fresh air heating and bathing hot water. The project was completed and officially put into use in October 2020.
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