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5072783 Extraction system of geothermal energy  
A direct transfer of heat is done with the dry hot rock or rock of any other kind working with a thermal fluid in a closed circuit.By means of sounding pipes (1) provided with internal fluid...
5044439 Method of treating geothermal wells with acrylate/acrylamide scale inhibitor  
A geothermal water well is treated with an effective amount of a scale inhibitor formulation containing a Na acrylate/acrylamide copolymer to inhibit the buildings of CaCO3 scale therein.
5038567 Method of and means for using a two-phase fluid for generating power in a rankine cycle power plant  
A method for using a two-phase fluid includes separating the fluid into its two phases, oen of which is a hot gas containing energy in the form of latent heat, and one of which is a hot liquid...
5027601 Low boiling point medium recovery apparatus  
A binary cycle power recovery apparatus which comprises, in combination, a steam separator for separating steam from hot water, a hot water tank where hot water is produced by directly introducing...
5020328 Silencer for geothermal power plant and method for using the same  
Spent geothermal fluid from a geothermal power plant comprises geothermal vapor in the form of steam and non-condensable gases, and geothermal liquid in the form of mineral-rich brines. A...
5009069 Method of recovering energy from ocean water  
A conduit extends from a platform on the surface of the ocean into cold deep ocean water containing dissolved gases. Sufficient water is drawn from the top of the conduit to cause the gas...
5005360 Solar energy system for generating electricity  
A solar energy system for generating electricity. The system tracks the sun during the day to produce a concentrated beam of light which is focused through a fixed opening in a heat storage...
4996846 Method of and apparatus for retrofitting geothermal power plants  
An existing geothermal power plant, utilizing geothermal steam from a production well in a geothermal field to drive a multi-stage steam turbine when the available steam pressure from the...
4982569 Parallel hybrid system for generating power  
An intermitently operable non-fuel-consuming power generator, such as a photovoltaic array or a wind generator, is connected through a control circuit to a battery for charging the same and...
4979374 Geothermal heat- and water supply plant  
A geothermal heat- and water supply plant comprises a geothermal well to remove brine which communicates with a separator which, in turn, communicates in the steam phase with a jet pump and a high...
4977744 Apparatus and method for extracting focused solar radiant energy  
There is provided an electricity generating system comprising two fluid circuits. The two circuits are in heat exchange relationship, one with the other. The first fluid circuit is in fluid flow...
4978457 Method of filtering a brine  
Condensate of steam derived from a geothermal brine is treated to enhance its utility as wash water for a brine filter. The condensate is sprayed into a tank in the presence of air to effect...
4967559 Contaminant abatement process for geothermal power plant effluents  
An improved contaminant abatement process is disclosed which provides effective, cost efficient abatement of contaminants, and particularly hydrogen sulfide and sulfide ions, from geothermal power...
4968488 Integrated system for pollution abatement and energy derivation from steam  
An integrated system for the derivation of useful energy from impure steam and/or use in connection therewith, said steam containing both hydrogen sulfide and an alkaline acting component, such as...
4953356 Geothermal reboiler apparatus and method  
Apparatus and method for handling geothermal brine containing high non-condensible gas concentrations. The brine is directed into a pre-flash chamber where a vapor fraction is separated from a...
4947825 Solar concentrator - radiator assembly  
A combined solar concentrator and radiator assembly (10) is provided in a relatively lightweight and compact geometry adapted particularly for use in electrical power generation systems in space....
4945731 Absorbing fluid receiver for solar dynamic power generation and solar dynamic power system  
A receiver is described for a solar dynamic power generator. The generator has a heat cycle engine to generate power. The receiver has a working fluid including a radiant eneryg absorber selected...
4945693 Concentric dome energy generating building enclosure  
This invention the concentric dome energy generating building enclosure makes possible the passive transfer of renewable energy from the wind and the sun into mechanical and/or electrical energy....
4942736 Method of and apparatus for producing power from solar energy  
The present invention provides a method of and apparatus for producing power from solar energy wherein a solar collector heats gas supplied to a gas turbine; compressors compress the gas, the gas...
4930316 Geothermal plant noncondensable gas removal and heat recovery system and method  
In a geothermal electric power generating plant of the type wherein a flow stream of hot geothermal brine from a production well is partially flashed to steam for turbine motive power, system and...
4926643 Closed loop system with regenerative heating and pump-driven recirculation of a working fluid  
A closed loop thermodynamic system that recirculates a vaporizable working fluid between its liquid and vapor states includes a thermal regeneration unit that receives exhausted working fluid...
4922720 Solar liquid heating system  
A solar heating system for heating fluid enclosed in a waterproof, heatable flexible bag held in a support which can be a cavity in the earth, insulated from ambient temperatures by alternate...
4917175 Corrugated heat pipe  
A corrugated heat pipe sealed at both ends is disclosed, having a longitudinally corrugated peripheral wall and containing operating liquid therein. The corrugated heat pipe comprises inside a...
4910963 Solar energy process  
Solar energy produces electric current which powers an electrolysis unit and a cryogenic cooling unit. Gaseous hydrogen and gaseous oxygen are liquified in the cooling unit and pumped into...
4907410 Thermal energy from environmental fluids  
A method of utilizing the thermal energy of environmental fluids to produce mechanical work or electricity by an energy conversion system wherein: the source fluid gives heat to the working fluid...
4905473 Geothermal power plant steam entrainments removal system and method  
In a geothermal electric power generating plant of the type wherein a flow stream of hot geothermal brine is partially flashed to steam for turbine motive power, a system and method for removing...
4896507 Solar power system  
A solar power system includes a solar concentrator and a power conversion unit for converting direct solar energy from the concentrator to electrical energy to power appropriate loads. The power...
4894989 Heater for a stirling engine  
A heater for use with a Stirling engine and a method for heating a working fluid for a Stirling engine is disclosed. The heater has a burner, heater tubes disposed in the burner, a space formed...
4884953 Solar powered pump with electrical generator  
A compressed gas engine is adapted for pumping ground water. The engine is powered by a low temperature heat source provided with a hydridable metal and hydrogen arranged operatively in a sealed...
4881372 Stirling engine  
A Stirling engine includes a heater device for collecting solar radiation energy, a heater tube disposed in the heater device and connecting the expansion space and the compression space of...
4878349 Atmospheric latent heat engine  
An atmospheric latent heat engine has a passageway extending from a converging entrance nozzle upward to an exit at a substantially higher elevation. Turbo generators, arranged within the...
4876854 Solar energy thermally powered electrical generating system  
A thermally powered electrical generating system for use in a space vehicle is disclosed. The rate of storage in a thermal energy storage medium is controlled by varying the rate of generation and...
4873826 Control scheme for power modulation of a free piston Stirling engine  
The present invention relates to a control scheme for power modulation of a free-piston Stirling engine-linear alternator power generator system. The present invention includes connecting an...
4874529 Process and apparatus for reducing the concentration of suspended solids in clarified geothermal brine  
A process and apparatus is provided for reducing the concentration of fine, residual solids still remaining suspended in clarified geothermal brine overflow from a primary brine clarification...
4869066 Method for the production of usable steam and non-toxic solids from geothermal brine  
A method is provided for producing electric power from hot, pressurized geothermal brine containing dissolved toxic elements without significant precipitation of toxic solids. When sludge produced...
4866939 Method and apparatus for extracting geothermal fluid  
A method and an apparatus for extracting geothermal fluid are disclosed. Pressurized and superheated steam is injected into a hot water region below the flashing point of the hot water in the well...
4856281 Solar power plant and still  
A solar power plant and still is disclosed in which a heat source for a Rankine Cycle engine is provided by a shallow pond which is covered by a sheet of suitable material, i.e., plastic; and...
4844162 Apparatus and method for treating geothermal steam which contains hydrogen sulfide  
Apparatus is provided for treating a flow of hot, pressurized, hydrogen sulfide-containing geothermal steam, particularly a flow of high-energy, surplus steam substantially as produced from the...
4841731 Electrical energy production apparatus  
A solar-powered system for supplying large quantitites of usable power consists of an array of photo-voltaic cells which drive an electrolysis generator in which water is converted into oxygen and...
4830092 Heat enhancers and salt purifiers for thermal energy storage canister  
A solar collector thermal power system 10 which includes thermal energy storage units (22) containing thermal energy storage canisters (28) with the associated heat enhancers and purifiers. A...
4829768 Fluid dissociation solar energy collection system  
A solar energy collection system utilizing a fluid, e.g. ammonia, which dissociates endothermically and recombines exothermically and in which work output is obtained directly from the...
4821516 Stirling cycle engine  
A Stirling cycle engine includes a cylinder and a displacer piston received in the cylinder. The cylinder has a cylinder head for receiving external heat radiation. The cylinder head is made of a...
4801811 Method of and means for generating electricity in an arid environment using elongated open or enclosed ducts  
Electricity is generated in an arid environment using an open duct such as a canyon that is closed at one end and open at the other by erecting an air dam at the open end of the canyon and...
4787450 Gas lift process for restoring flow in depleted geothermal reservoirs  
A method is provided whereby continuous injection of lift gas into a producing geothermal well, preferably from a liquid-dominated reservoir, increases production flow of geothermal fluids from...
4785632 Solar energy concentrator  
Continuous concentration of solar heat on a fluid contained in a fixed, spherical boiler chamber, whereby the fluid is vaporized and thus drives a turbine, is effected by means of a paraboloidal...
4785633 Solar evaporator  
A solar evaporator for use with Stirling engines consisting of a dish shape hollow body having wicking containing a vaporizable liquid heating medium. The body has a pair of separate chambers to...
4784775 Removal of hydrogen sulfide from sour water  
Sour water is treated to remove dissolved hydrogen sulfide by means of an aqueous chelated polyvalent metal solution in a continuous recirculating system, particularly an autocirculation system,...
4781018 Solar thermal propulsion unit  
This invention relates to a space vehicle 10 in which solar radiation is utilized to generate thrust by virtue of a solar thermal propulsion unit 12. The propulsion unit comprises basically...
4781029 Methods and apparatus for ocean thermal energy conversion using metal hydride heat exchangers  
Methods and apparatus for ocean thermal energy conversion using metal hydride heat exchangers to power a turbine by desorbing and absorbing hydrogen gas. Heat exchangers are alternatively floated...
4781173 Evaporating device and electric supply station provided with such an evaporating device  
An evaporating device comprises sets of solar heating units of a type having an insulated oblong room provided at the top with a slit, a mirror structure mounted on said room and a pipe extending...