Title: Geothermal energy system fluid filter and control apparatus

Abstract: A geothermal energy transfer and utilization system abstracts thermal energy stored in hot solute-bearing well water to generate super-heated steam from an injected flow of clean water; the super-heated steam is then used for operating a turbine-driven pump at the well bottom for pumping the hot solute-bearing water at high pressure and always in liquid state to the earth's surface, where it is used by transfer of its heat to a closed-loop vapor generator-turbine-alternator combination for the generation of electrical or other power. Cooled, clean water is regenerated by the surface-located system for re-injection into the deep well and the residual concentrated solute-bearing water is pumped back into the earth. The invention features filter apparatus installed within the well at the location of the vapor generator-turbine-pump apparatus for removal of solid matter from the re-injected water before its use for lubrication of turbine and pump bearings and before conversion into a working fluid for driving the deep well turbine.

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Inventors: Matthews, Hugh B. (Acton, MA, US)

Application Number: 487109
Filing Date: 1974-07-10
Publication_date: 1976-02-24
Assignee: Sperry Rand Corporation (New York, NY)
Primary Class(es): 60/641.4 165/45
Other Classes:
US Patent Ref:

2028471	Jan, 1936	Parent et al.	165/45.
2637531	May, 1953	Davidson	165/45.
3757516	Sep, 1973	McCabe	165/45.
3777502	Dec, 1973	Michi, III et al.	165/45.

Other Refs: 514,673

Dec, 1930	DD

Primary Examiner: Schwadron, Martin P.
Assistant Examiner: Burks, Sr., H.
Attorney: Terry; Howard P.