METHOD FOR CONCURRENT-AND-SEPARATE USE OF TWO THERMAL WATER BEARING BEDS Russian patent published in 1998 - IPC

FIELD: geothermal power engineering. SUBSTANCE: method involves operation of geothermal circulating system built up of two wells one being input well and other, output well. High-temperature thermal water of lower bed circulates over closed circuit: bed - output well - surface piping - pump - input well - bed. Low-temperature thermal water of overlying bed is extracted over intertube annular space of both output and input wells. As water is lifted and reaches intertube space, it heats up to high temperature due to heat transfer from lower-bed water. On surface, hot water taken from overlying bed is supplied to heat-insulated storage tank and further conveyed by means of pump to user. Waste water is pumped from user over separate well to overlying water-bearing bed. EFFECT: facilitated procedure. 1 dwg