FIELD: systems using natural heat energy for geothermal power plants or remote heating systems.
SUBSTANCE: proposed method for energy exchange between earth bodies and energy exchanger is implemented by system in which energy exchanger 2 communicates through forward-flow line 10 and return-flow line 14 of circulating water loop with heat exchanger 18 that uses earth heat energy and has at least one forward-flow heat insulated tube 20, 20a disposed in borehole 22 wherein it is enclosed by separating tube 24 that has radial return-flow region 28 on external side for circulating water wherein there is at least one return-flow tube 30 communicating with return-flow line 14; at least lower region of borehole carries porous filler 18 and communicates with bottom inlet hole 45, 46a of forward-flow tube 20, 20a at least at bottom of borehole 22 via one or more through holes 44 made in separating tube 24. Adjustable shut-off valves 12, 16 are installed on forward- and return-flow lines 10 and 14. At least one forward-flow heat-insulating tube is disposed within separating tube 24 inside borehole 22; region 28 disposed in radial direction outside tube 24 forms circulating-water return-flow region. Disposed in return-flow region 28 is at least one return-flow tube 30 communicating with return-flow line 14 and with porous filler 38, as well as with forward-flow tube 20 at least at bottom of borehole 22 through inlet hole 20 made at bottom of this tube or through inlet holes 46, 46a of forward-flow tubes 20, 20a via one or more through holes 44 made in separating tube 24. System also has device 50 connected thereto for filling it with medium to build up high pressure within system, and preferably drain cock 56 disposed in forward-flow line 10 between shutoff valve 12 and heat exchanger 18 using earth heat energy, both designed to drain circulating water from forward-flow tube 20 and to initiate water vapor generation and displacement from earth body.
EFFECT: reduced boring and operating cost, enhanced reliability.
35 cl, 9 dwg
