I read about Adsorption cooling, which is a process whereby heat Is used to generate cold air, seems that the machinery needed to do this process is In development stages, With only few big machines out so far. Could this in the future be used in mining facilities, where miners will be stacked in Isle with Adsorption cooling machines between the isle, using the one miner's hot outlet air, and transforming it into cool air for the next's intake.
https://www.technologyreview.com/s/423466/using-heat-to-cool-buildings/
https://www.bryair.com/products-solutions/adsorption-chillers/adsorption-chiller?gclid=CjwKCAiAr_TQBRB5EiwAC_QCq4rD2u9j1TDNNbHYuA93oe-SlNKKujOEwhkFC66Sl-NbaWhXASly7BoCq5cQAvD_BwE