Matches 151 - 200 out of 217 < 1 2 3 4 5 >
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4356401 Thermo-electric power station supplied by geothermal heat source  
The invention concerns a thermo-electric power station, supplied by a geothermal heat source, involving the use of at least two fluids. The first fluid (water) makes it possible to transfer the...
4353212 Closed fluid loop solar thermodynamic system  
Thermodynamic unit comprised of a pair of vessels which alternately raise and lower pressure in thermodynamic fluid is connected in a closed system to an engine, which utilizes the fluid in its gas...
4343999 Steam-electrical generating system using geothermal heat source  
A liquid-to-liquid heat pump is utilized for supplying sufficient heat to generate steam from the condensate of a steam turbine. A liquid coolant is circulated through the condenser of the steam...
4342197 Geothermal pump down-hole energy regeneration system  
Geothermal deep well energy extraction apparatus is provided of the general kind in which solute-bearing hot water is pumped to the earth's surface from a subterranean location by utilizing thermal...
4304666 Geothermal brine treatment  
A system is provided for treating spent geothermal brine to remove silica. The process includes introducing the brine into the reaction zone of a reactor-clarifier and allowing the brine to flow...
4297847 Conversion of geothermal energy from subterranean cavities  
Geothermal energy is recovered by (1) introducing into a subterranean heat exchange medium which is in heat exchange with a high temperature formation a liquified vapor which will vaporize at the...
4290266 Electrical power generating system  
A geothermal energy system in which a bore hole is drilled into the earth to a depth where a predetermined temperature gradient exists between the earth's surface and the bottom of said bore hole....
4285201 Vapor powered engine assembly  
An engine assembly that is powered by high pressure vapor from a volatile liquid that has a boiling point substantially below the minimum ambient temperature in the geographical location in which...
4262485 Low boiling point medium power plant  
A low boiling point medium power plant in which heated waste gas, such as furnace gas, geothermic steam, etc., is used as a heat source for heating an intermediate thermal medium by means of an...
4261708 Apparatus and method for separating impurities from geothermal steam and the like  
A horizontal separator for separating impurities from geothermal steam or the like is provided which includes a pair of drip or drain legs for accommodating the separated fluid portion containing...
4259300 Integrated method for pollution abatement and energy derivation from geothermal steam  
An integrated method for the derivation of useful energy from steam containing both hydrogen sulfide and an alkaline acting component, such as ammonia, while substantially reducing the emission of...
4255933 Geothermal power producing loop  
A power producing loop continuously carrying water picking up geothermal heats and being made into steam and condensate that is continuously returned to said water source, with appropriate means of...
4242305 Apparatus for controlling emissions of hydrogen sulfide from a system utilizing geothermal steam  
Certain impure steams, especially those from geothermal sources, are polluted with hydrogen sulfide, ammonia, carbon dioxide, other gases, and finely divided particulate solid matter in a form...
4232992 Geothermal turbine and method of using the same  
A turbine and method of using the same to generate rotational power from a desired geothermal source from which a multi-phase pressurized and heated fluid is discharged, which fluid contains steam...
4228657 Regenerative screw expander  
Screw expander is employed in closed cycle steam power cycle and employs heat extraction during steam expansion to improve Rankine cycle efficiency.
4224151 Preventing scale deposition from geothermal fluids  
A method for preventing the deposition of sulfide and/or sulfate scale during the production of a hot two-phase geothermal fluid which contains hydrogen sulfide, barium heavy and/or transition...
4202177 Energy production for complex geothermal waters  
A method of obtaining energy in useful form utilizing complex geothermal waters as a source of energy, the method comprising the steps of initially maintaining pressure on the hot geothermal waters...
4202864 Process for controlling environmental pollution from steam containing hydrogen sulfide  
Certain impure steams, especially those from geothermal sources, are polluted with hydrogen sulfide, ammonia, carbon dioxide, other gases, and finely divided particulate solid matter in a form...
4201060 Geothermal power plant  
A method for generating electricity wherein a geothermal fluid is produced from a moderate temperature hydrothermal formation and is used to supply sufficient sensible heat to preheat a working...
4151260 Hydrogen sulfide abatement in geothermal steam  
A process for reducing the hydrogen sulfide content of geothermal steam during a drilling operation by injecting hydrogen peroxide and an alkali metal hydroxide or calcium hydroxide into a flowing...
4137720 Use of calcium halide-water as a heat extraction medium for energy recovery from hot rock systems  
In order to extract energy in a matter more efficient than is presently known to the art, from hot dry rock geothermal systems, a mixture of water and calcium chloride is used. The fluid mixture is...
4137719 Method for energy extraction from hot dry rock systems  
In order to prevent scale formation in a hot dry rock geothermal system, a mixture of acetone and water is utilized as the working fluid. Such fluid reduces the amount of scale formation generally...
4132269 Generation of electricity during the injection of a dense fluid into a subterranean formation  
Electricity is generated during the injection of a dense fluid through an injection well and into a subterranean formation having a connate fluid pressure less than the available downhole pressure...
4127989 Method for separating metal values from brine  
A process for separating and recovering metal values and salts from brine, such as brine produced from a subterranean geothermal reservoir, in which the brine is pressurized to above the bubble...
4124805 Pollution-free power generating and peak power load shaving system  
An improved electric power regeneration system, featuring reduced environmental air and thermal pollution. The system employs a method and means whereby during periods of low load demands upon a...
4123506 Utilization of impure steam contaminated with hydrogen sulfide  
Certain impure streams, especially those from geothermal sources, are polluted with hydrogen sulfide, ammonia, carbon dioxide, other gases, and finely divided particulate solid matter in a form...
4112745 High temperature geothermal energy system  
Method and apparatus for controlling a well providing access to an underground source of high temperature geothermal brine against flashing as the hot brine is delivered upwardly through the well...
4106295 Air pressure differential energy system  
An air pressure differential energy generation system comprises a stack for conduction of air from a high to a low atmospheric pressure level. A vapor injection device within the stack provides a...
4102133 Multiple well dual fluid geothermal power cycle  
Heat energy from hot geothermal fluids supplied by different temperature wells is transferred by heat exchange into a power fluid cycle, preferably of the dual fluid type, at different points in...
4094356 Geothermal heat recovery system  
A system for recovering heat from a geothermal well includes a quantity of heavy drilling mud filling the bottom of the geothermal well. A hollow heat absorber is disposed within the drilling mud...
4091623 Geothermal actuated method of producing fresh water and electric power  
Method and apparatus for implementing the same to provide fresh potable water and electric power from a source of natural brine by the use of energy derived from a geothermal source of pressurized...
4085795 Method for using geothermal energy  
Geothermal energy is used to provide the temperatures and pressure necessary for catalytic conversion of carbon monoxide and hydrogen to methanol by lowering the reaction chamber into a geothermal...
4078904 Process for forming hydrogen and other fuels utilizing magma  
The disclosure relates to a method for extracting hydrogen from magma and water by injecting water from above the earth's surface into a pocket of magma and extracting hydrogen produced by the...
4060988 Process for heating a fluid in a geothermal formation  
An in situ heat exchange process for heating an organic fluid, which can be, for example, a normally liquid hydrocarbon having from 4 to 10 carbon atoms, in a geothermal reservoir formation...
4054175 Geothermal power system  
Disclosed are a system for extracting heat from hot unrefined water for the purpose of using this heat to do useful work, and specifically for extracting such heat while minimizing the undesirable...
4052857 Geothermal energy from salt formations  
A method of obtaining geothermal energy from salt formations in which a well is drilled and cased into a suitable salt formation to a depth where the temperature is such that the salt behaves...
4047093 Direct thermal-electric conversion for geothermal energy recovery  
Direct conversion systems for in situ conversion of geothermal energy into electricity are described in which thermoelectric generators and/or thermionic convertors directly convert the earth's...
4027483 Device for converting internal energy of hot fluids to shaft work  
Apparatus to convert the internal energy of hot fluids to mechanical work comprising a pair of nozzles, e.g. convergent-divergent nozzles, mounted oppositely on hollow support arms which are in...
4022025 Cyclical energy transfer method and apparatus  
This is a method and apparatus for practicing the method, for the utilization of geothermal energy for the production of power, wherein a fluid (stream and/or hot liquid, or the like) from a...
3995428 Waste heat recovery system  
Waste heat in the form of the sensible heat of flue gases, sensible and latent heat of geothermal sources, etc., is converted to usable energy. When the energy source consists solely of sensible...
3986362 Geothermal power plant with intermediate superheating and simultaneous generation of thermal and electrical energy  
A geothermal power device including typically a volcanic plug basalt rock geothermal heat exchange unit and a source of a high temperature thermal energy source connected to a gas generator vessel...
3977818 Throttling means for geothermal streams  
A helical screw expander for deriving energy from geothermally heated water. The expander includes a pair of helical rotors with helical structures fitted in an expansion chamber. The geothermally...
3975912 Geothermal dual energy transfer method and apparatus  
This is a method, and apparatus for practicing the method, for the transfer of geothermal energy and for its use in the production of power, wherein an energy extractor is placed within each of two...
3957108 Multiple-completion geothermal energy production systems  
A system for the mining of geothermal energy in which a plurality of geothermal wells radiate from a single surface site into a subsurface geothermal reservoir. The wells can be drilled by...
3951794 Geothermal power method  
Disclosed are a system and method for extracting heat from hot unrefined water for the purpose of using this heat to do useful work, and specifically for extracting such heat while minimizing the...
3935102 Geothermal power system and method  
A system and method for extracting heat from hot unrefined water and ultimately using this heat to do useful work, while avoiding the danger of damage to heat exchange equipment by scale and...
3933447 Underground gasification of coal  
There is disclosed a method for the gasification of coal in situ which comprises drilling at least one well or borehole from the earth's surface so that the well or borehole enters the coalbed or...
3911683 Efficient and nonpolluting method for recovering geothermal heat energy  
Geothermal heat is transferred from either dry or wet sub-terranean strata to a location at or neat the earth's surface by a passive heat pipe extending into a well. The upper end of the heat pipe,...
3875749 Geothermal power plant with high efficiency  
In a preferred embodiment, there is provided a closed-system geothermal power plant operative and maintained at super-critical pressure in the utilization of carbon dioxide as the power fluid used...
3874174 GEOTHERMAL HEAT EXCHANGE METHOD AND APPARATUS  
This is a method and apparatus for utilizing hot brine existing beneath the Earth's surface as a source of power, wherein the hot brine is utilized to volatilize a liquid substance in order to...
Matches 151 - 200 out of 217 < 1 2 3 4 5 >