As mines descend to greater depths in search of minerals, higher temperatures and humidities are encountered associated with the heat released from off the surrounding rock. These conditions make a comfortable working environment difficult and expensive to maintain. To overcome this condition, large quantities of water must be carried down long vertical pipelines to be used for refrigeration and personnel cooling. The cost associated with providing this cooling is rising, and creates financial hardships on the mining operation, especially in times of unstable mineral prices. To help deal with this problem, the U.S. Bureau of Mines has awarded a contract to Foster-Miller, Inc. of Waltham, Massachusetts, to investigate and evaluate commercially available means of energy recovery for the deep mining industry.
Turbomachinery Int., V. 24, No. 9, November-December 1983, PP. 23-26