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5461862 System for conversion of sea wave energy  
A system for the conversion of sea wave energy including a breakwater structure including a wave energy collector integrally formed within the breakwater structure. The energy collector collects...
5454689 Process for sealing the rotor of a turbine which uses wet geothermal steam  
A process for sealing the rotor of a turbine which uses wet geothermal steam under pressure in which the said rotor is provided with a plurality of adjacent labyrinth sealing rings interposed with...
5448889 Method of and apparatus for producing power using compressed air  
A method for producing power comprises compressing gas from an ambient source during a first period of time; storing the compressed gas in a storage reservoir; and supplying said compressed gas...
5444972 Solar-gas combined cycle electrical generating system  
A design of a power plant which uses hydrocarbon fuels in conjunction with solar power to produce electricity. The power plant consists of an array of heliostats for concentrating sunlight on a...
5442906 Combined geothermal and fossil fuel power plant  
A power production process integrates geothermal steam and fossil fuel energy sources to give a higher energy efficiency than is normally obtained when using these energy sources individually....
5440882 Method and apparatus for converting heat from geothermal liquid and geothermal steam to electric power  
A method and apparatus for implementing a thermodynamic cycle that includes: (a) expanding a gaseous working stream, transforming its energy into usable form and producing a spent working stream;...
5419135 Space-based power generator  
A power generation system for use in outer space includes a radiation receiver disposed for receiving energy from solar, stellar or planetary heat radiation. The radiation receiver includes at...
5417052 Hybrid solar central receiver for combined cycle power plant  
A hybrid combined cycle power plant including a solar central receiver for receiving solar radiation and converting it to thermal energy. The power plant includes a molten salt heat transfer...
5413718 Use of added water to achieve 100% injection weight in geothermal operations  
Geothermal brines are extracted from the earth, flashed and the remaining liquids are injected back into the earth. Although it would be advantageous for resource maintenance to inject the same...
5409614 Control of scale deposition in geothermal operations  
NORMs are inhibited or prevented from precipitating with scale produced by a hot aqueous solution by adding multiple portions of a crystal structure modifier to the aqueous solution as it cools...
5404723 Fluid absorption receiver for solar radiation to power a Stirling cycle engine  
Disclosed are apparatus and methods used to preheat a working fluid for a subsequent solar-driven dissociation reaction. The working fluid is first passed through a blackbody receiver where it...
5400598 Method and apparatus for producing power from two-phase geothermal fluid  
Power is generated from a two-phase geothermal fluid containing a substantial amount of non-condensable gases, typically not less than about 3% by extracting a geothermal fluid from the ground...
5399067 Nozzle for use in a geothermal steam turbine and method for preventing adhesion of scale thereto  
A nozzle for use in a geothermal steam turbine is adapted to prevent precipitation and adhesion of scale onto the surface of the nozzle. A coolant water passageway is provided in an initial stage...
5395070 Solar energy concentrator assembly and associated method  
A solar energy concentrator assembly comprises flexible polymeric sheet which carries an integral optical element in the form of a Fresnel lens for concentrating a substantial amount of incoming...
5381048 Solar venturi turbine  
A solar venturi turbine includes an upwardly oriented venturi tube supported by a venturi support skirt. The venturi tube includes a tapered thermopane glass enclosure which allows sunlight to...
5351488 Solar energy generator  
A system for coupling a plurality of solar powered bubble pumps in series is described. By controlling the boiling temperature of the circulating fluid contained in the system, the flow of liquid...
5337562 Stirling engine  
In a Stirling engine having a housing chamber (1) which is divided by a reciprocating gas-permeable regenerator plate (4) into two part chambers (6, 7), of which one can be heated and the second...
5335497 Rotary Stirling cycle engine  
A rotary Stirling cycle engine which has a pair of hollow chambers (20) each having an elliptical rotor (30) positioned inside and rotatably sealed to the chambers inner walls. A crankshaft (40)...
5311741 Hybrid electric power generation  
A new hybrid electric power production cycle is revealed, which utilizes hot, dry-rock, geothermal energy to produce dry, saturated steam, and utilizes natural gas or other fossil fuel to...
5308187 Parking lot pavement for making hot precombustion air for a fossil fuel burner  
A method of making hot air in the range of 200 degrees (F) from the sunlight striking the paved surface of a parking lot is described. The transparent surface is above an opaque surface forming a...
5305607 Geothermal power plant scale separation method and apparatus  
In a geothermal electrical power generating plant of the type employing one or more flash crystallizers and one or more reactor clarifiers for processing a large quantity of particulate silica...
5303552 Compressed gas buoyancy generator powered by temperature differences in a fluid body  
A compressed gas buoyancy generator powered by temperature differences in a fluid medium having a thermal gradient which includes a body having an inflatable chamber connected thereto for...
5291847 Autonomous propulsion within a volume of fluid  
Energy is collected from temperature differentials in a volume of fluid and the energy is used for autonomous propulsion in the fluid.
5277823 Silica scale inhibition  
A method for inhibiting silica scale formation in aqueous systems using selected low molecular weight (meth)acrylic or maleic acid based copolymers or terpolymers, magnesium ion alone, or the...
5272879 Multi-system power generator  
A geothermal power system utilizes a fluid refrigerant capable of changing phase between liquid and gaseous states. The system includes a heat exchanger exposed to a heat source such as earth,...
5271225 Multiple mode operated motor with various sized orifice ports  
An apparatus powered by solar cell photon energy having a motor for rotating a drive shaft by the use of compressed air. The motor comprising: a housing having a circular cross section with a...
5269145 Heat storage system with combined heat storage device  
In order to improve a heat storage system, comprising a heat source, a heat storage device and a heat sink, between which heat is transferred by means of a heat transporting medium, such that a...
5256301 Control of salt precipitation from geothermal brine  
Soluble salts are prevented from precipitating from a brine concentrate produced from the flashing a geothermal brine by diluting the brine concentrate with preconditioned condensate. The pH of...
5256302 Method for controlling silica and water soluble silicate deposition  
A method for the inhibition of silica and silicate deposits on the internal surfaces of a water system consisting of adding to the water system a composition comprised of a blend of two water...
5253926 Process for making general use of the earth's heat and obtaining minerals in the zone of weakness (at depths of 13-30 km)  
The hot-weak-rock process for overcoming the technical limitation inherent to the Hot-Dry-Rock Process, of not being able to overcome the shear strength of the rock beyond a certain depth in order...
5247796 Solar augmented power system  
The present invention relates to an energy conversion system and more particularly tot he related apparatus and process. A reactor chamber is positioned with respect to a means for collecting and...
5246593 Silica scale deposition control  
The concentration of amorphous silica in an aqueous solution is monitored to determine a concentration above which silica will precipitate. The precipitation concentration is data processed with a...
5246350 High efficiency solar powered pumping system  
A high efficiency solar powered water pumping system (10) includes a solar collector (12) for heating and vaporizing a working fluid. The vaporized working fluid is passed to a motor and valve...
5228293 Low temperature solar-to-electric power conversion system  
The apparatus is a low-temperature solar to electric power conversion system. A solar collector directs solar insolation to a cavity receiver which heats primary thermal transport fluid to...
5220792 Method of and means for extracting heat from a hot fluid containing foreign material that interferes with heat transfer  
A method is provided for extracting heat from a hot liquid containing scaling material whose solubility is proportional to the temperature of the liquid. The method includes providing a pond...
5214921 Multiple reflection solar energy absorber  
This invention the multiple reflection solar energy absorber makes possible the direct absorption of solar energy into a transparent working fluid, thereby heating the fluid and discharging it...
5203173 Device for utilization of geothermal energy  
The device proposed has a pipe (3) sunk into the Earth's crust and designed to convey to the surface a fluid heated by geothermal energy, possibly in vapor form. The device also has a second,...
5190664 Brine heat exchanger treatment method  
A method for controlling fouling of a heat exchange surface exposed to a high-enthalpy geothermal brine tending to form silica scale, but containing less than a saturated amount of cations capable...
5183100 System for efficiently exchanging heat or cooling ground water in a deep well  
A novel ground water heat transfer system is provided for low cost and high efficiency heat pumps and includes a deep well filled with water. An insulating sleeve which is smaller than the...
5163821 Solar thermal powered water pump  
A solar powered water pump combines an evacuated tubular solar collector array for heating air with a diaphragm type pump by providing an internal heat exchanger in the manifold of the collector...
5154777 Advanced survivable space solar power system  
A photovoltaic electric power system for use in space. A self contained sun powered electric power generating system comprising a fresnel mirror array made up of a plurality of quadrilateral...
5143150 Geothermal heat converter  
A geothermal heat converter for converting geothermal heat to steam. The converter is mounted in the lower end of a geothermal well conduit and includes a cup portion in direct engagement with the...
5123247 Solar roof collector  
A solar roof collector comprising a plate collector with a plurality of transparent conduits to channel a thin film of water from an insulated reservoir in order to increase the temperature of...
5119635 Method of a means for purging non-condensable gases from condensers  
Condenser fluid comprising vaporized working fluid and non-condensable gases is treated by extracting fluid from the condenser and pressuring the fluid to liquefy the vaporized working fluid...
5113659 Solar thermal energy receiver  
A plurality of heat pipes in a shell receive concentrated solar energy and transfer the energy to a heat activated system. To provide for even distribution of the energy despite uneven impingement...
5114318 Automatic-cycling heat-powered fluid pump  
An improved heat-powered pump comprising two variable-volume fluid-containing systems located within two rigid walled containers, a pumping container and a condensing container. Each variable...
5103646 Solar and wind powered generator  
A wind powered device incorporates a solar furnace and vortex generator to provide additional power and boost the efficiency of the complete system. Two concentric dome assemblies connected by a...
5099648 Hydraulic air compressor and turbine apparatus  
Hydraulic air compressor and turbine apparatus includes a hydraulic air compressor having an air intake disposed above the water intake for entraining air in falling water, and the output of the...
5095705 Process for producing energy from water flowing down a borehole and recovery same  
A process for producing energy from introducing water down a borehole, which includes (a) providing a borehole having a depth of at least 20,000 feet; (b) providing a casing in the borehole of a...
5073270 Use of reducing agents to control scale deposition from high temperature brine  
The deposition of metal-containing scale, such as iron silicate scale, from a hot aqueous geothermal brine, or the like, is controlled by blending into the brine sufficient reducing agent...