YUANWANG · WATER & WELLNESS
English reading edition of source pages 30-44. Original reference plates are preserved with English explanations and drawing keys.
SOURCE PAGE 30 / 78
Concepts for single-well heat exchange and fracture-enhanced geothermal heat recovery.
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SOURCE PAGE 31 / 78
Brochure cites Hebei 2019 data: 2,305 plain-area geothermal wells, approximately 77% without compliant reinjection provision, alongside a 23.5% reinjection figure. It describes provincial support for heat extraction without net water withdrawal, simplified filing, subsidies, demonstrations and local standards. These are historical source statements; current local requirements and eligibility require confirmation.
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SOURCE PAGE 32 / 78
Closed-loop example: double-U HDPE pipes, water or antifreeze, and circulation pump. Source shallow examples: 80-150 m depth and 10-25°C ground temperature. Winter: collect ground heat and upgrade with a heat pump; summer: reject building heat to the ground. Open-loop example: pump groundwater through a plate exchanger and reinject through the same or a nearby well. Source calls for full same-aquifer reinjection. Shallow U-tube and deep fracture-enhanced systems are different technologies.
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SOURCE PAGE 33 / 78
Well heat source coupled to a refrigerant heat-pump cycle. Key:heat pipe;evaporator;compressor;condenser;expansion valve. Heat enters at the evaporator, is upgraded through compression and released at the condenser.
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SOURCE PAGE 34 / 78
Alternative view of the heat-pipe/heat-pump concept. Key: heat pipe; evaporator; compressor; condenser; expansion valve. Flow arrows distinguish heat collection and delivery paths.
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SOURCE PAGE 35 / 78
Key:circulation pump;heat pump;heating/load side;outlet;inlet;heat input from hot dry rock. Downflow/upflow collect underground heat. Concept diagram, not construction detail.
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SOURCE PAGE 36 / 78
Illustration of fracture creation around a well and increased contact with the geothermal formation. Performance depends on geology, connectivity and well design.
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SOURCE PAGE 37 / 78
Left: conventional downhole exchange. Right: fractured single-well exchange. Key:mains water;heated water;geothermal water;cool water;vacuum-insulated pipe;stimulation-created fractures;fractures in hot rock;sealing ring. Source marks a 200 m interval and claims tenfold efficiency, 80% lower operating cost, winter heating and no government well management. These are unverified source claims, not guarantees or current regulatory advice.
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SOURCE PAGE 38 / 78
Key:hot water;reinjection water;return;geothermal water;nano-insulated pipe;vacuum-insulated pipe;geothermal flow separator (source term). Source dimensions: 351 (unit not printed), >171 mm, 151 mm and an interval >500 m. Reference sketch, not approved well design.
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SOURCE PAGE 39 / 78
Fracture-enhanced single-well concepts proposed for supplying heated bathing water to buildings.
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SOURCE PAGE 40 / 78
Brochure repeats historical well/reinjection policy context and proposes single-well heat exchange for bathing-water preparation, also claiming mineral enrichment of mains water. A sealed heat exchanger heats water without transferring minerals or establishing natural mineral-water status. Any separate conditioning process requires its own specification and water-quality evidence.
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SOURCE PAGE 41 / 78
Source describes municipal support up to 30% of qualifying new-energy construction investment for medium/deep downhole exchange, with possible district support. It recommends consultation with the district development/reform authority and checking current application calls. This is a historical brochure reference, not confirmation of an available grant or eligibility.
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SOURCE PAGE 42 / 78
Original illustration depicts shale-gas horizontal-well hydraulic fracturing, used as a general process picture. Tankers deliver water; pumps inject water/sand/chemicals; the well turns horizontal; pressure opens fractures, sand props them open, gas reaches surface storage, returned water goes for treatment. It mentions about 200 tanker loads and >1 million US gallons (3,785.4 m³). Those quantities describe the gas-industry illustration, not a Yuanwang geothermal specification. Key:shale;gas well;groundwater level;storage tank;fracture;subsurface depth in feet.
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SOURCE PAGE 43 / 78
Left: villa supply from geothermal well through water treatment, storage, circulation and water heating. Right: proposed fractured-well supply. Key:villa supply area;hot-spring treatment;storage tank;geothermal well;safety valve;water heater;circulation pump;supply to buildings;mains-water pressure drop;high-temperature fractures;sealing ring. Source claims abandoned-well revival and filing without mining rights; both require site/regulatory verification. Sealed heating does not create natural mineral water.
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SOURCE PAGE 44 / 78
Key:bathing-water supply;geothermal return;mains water;reinjection;return;deep-well pump;geothermal flow separator. Source dimensions >171 mm, 151 mm and interval >500 m. Well design, separation, pressure and water quality are project-specific.
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