GEOTHERMAL ENERGY USING DEVICE AND METHOD Russian patent published in 2002 - IPC

FIELD: using geothermal energy for water delivery. SUBSTANCE: drinking water field is used by secondary water supply system for conveying drinking water from user admission line running from drinking water field but upstream of user s flowmeter through components of user s heat-transfer apparatus and back to drinking water field point upstream of final water treatment stage in field. In this way heat energy of water in field is used without increasing drinking water cost for user; water contaminated to a certain degree upon passing though secondary water supply system is re-treated. In spite of the fact that water returns over secondary water supply system to drinking water field at constant temperature depending on operation of heat-transfer apparatus, relatively large volume of drinking water in field ensures maintenance of drinking water temperature in field at relatively constant level due to return water. EFFECT: reduced cost of water supplied to user. 6 cl, 1 dwg