65 results about "Geothermal power generation" patented technology

A geothermal system obtains heated heat transfer fluid via heat transfer with an underground reservoir of magma. The geothermal system includes a wellbore extending between a surface and into the underground reservoir of magma. A fluid pump provides a flow of heat transfer fluid toward the underground reservoir of magma. A fluid conduit extends from the surface toward a terminal end of the wellbore and allows flow of heated heat transfer fluid from a portion of the wellbore that extends into the underground reservoir of magma toward the surface.

Systems and techniques may be used for incorporating direct air carbon dioxide capture capabilities into a working fluid condensing process of a geothermal power plant. An example technique may include causing, using fans, air to flow across condenser coils of a condensing unit, through which power cycle working fluid is circulated, and through a direct air capture (DAC) filtration component, which separates carbon from the air, capturing heat from a geothermal working fluid, and using the heat as thermal energy input to the DAC filtration component or using electrical energy generated from the geothermal power plant as electrical energy input to power the condensing unit and the DAC filtration component. The example technique may include gathering the carbon separated from the air to be injected into a geothermal reservoir or repurposed for another industrial process.

A scrubber for geothermal power generation, includes a treatment container, a drainage pipe, and a cooling mechanism. The treatment container separates geothermal steam into a separated gas and a separated liquid by treating the geothermal steam with a treatment liquid and has a steam supply opening to which the geothermal steam is supplied, and a gas release opening from which the separated gas is released. The drainage pipe is placed below the treatment container to discharge the separated liquid. The cooling mechanism cools a portion of the treatment container between the steam supply opening and the drainage pipe.

The application discloses a kind of deep geothermal power generation systems of hydrothermal-dry heat collaborative development, belong to geothermal organic rankine cycle power generation technical field;It includes: heat exchange component, geothermal heat extraction component and power generation component.Heat exchange component includes the preheater for heat exchange, low-pressure stage evaporator and high-pressure stage evaporator;Geothermal heat extraction component includes the first heat extraction unit for absorbing water heat type geothermal and the second heat extraction unit for absorbing dry hot rock type geothermal;First heat extraction unit, preheater, second heat extraction unit, high-pressure stage evaporator and low-pressure stage evaporator are sequentially communicated by pipeline, first heat extraction unit can preheat the heat medium to second heat extraction unit;Power generation component includes high-pressure power generation unit, low-pressure power generation unit and condensing unit, and high-pressure stage evaporator can high-pressure power generation with high-pressure power generation unit;Low-pressure stage evaporator can low-pressure power generation with low-pressure power generation unit.The application can maximize the value of low-temperature hydrothermal resources.

Systems and techniques may be used for incorporating direct air carbon dioxide capture capabilities into a working fluid condensing process of a geothermal power plant. An example technique may include causing, using fans, air to flow across condenser coils of a condensing unit, through which power cycle working fluid is circulated, and through a direct air capture (DAC) filtration component, which separates carbon from the air, capturing heat from a geothermal working fluid, and using the heat as thermal energy input to the DAC filtration component or using electrical energy generated from the geothermal power plant as electrical energy input to power the condensing unit and the DAC filtration component. The example technique may include gathering the carbon separated from the air to be injected into a geothermal reservoir or repurposed for another industrial process.

The invention relates to a photo-thermal coupling terrestrial heat power generation device. The photo-thermal coupling terrestrial heat power generation device comprises a photo-thermal assembly, a power generation assembly coupled with the photo-thermal assembly through a first heat exchanger and a terrestrial heat assembly coupled with the photo-thermal assembly through a second heat exchanger. The geothermal assembly comprises a sleeve inserted into the target stratum and a heat insulation pipe arranged in the sleeve, and an annular space communicated with the power generation assembly is formed between the sleeve and the heat insulation pipe. Wherein the photo-thermal assembly is constructed to be capable of transmitting heat to the power generation assembly and the geothermal assembly through the first heat exchanger and the second heat exchanger respectively, so that the geothermal assembly conveys a heated heat-conducting medium to a target stratum through an annulus; therefore, the geothermal assembly can convey the heat-conducting medium at the target stratum to the power generation assembly when the heat transferred to the power generation assembly by the photo-thermal assembly is smaller than the heat required by the power generation assembly. Therefore, an underground aquifer or other geological structures can be used as an energy storage medium, the energy storage period is prolonged, the operation cost is reduced, and the continuity and stability of power generation are effectively improved.

A geothermal power system generates electricity using a geothermal fluid. The geothermal fluid is produced from, and then injected into, fractures in a subterranean formation such that pressures inside the fractures are maintained between the corresponding closure pressures propagation pressures of the fractures. In some aspects, the fractures are devoid of proppant, and are maintained open by the pressure of the fluid within the fractures.

This invention belongs to the field of ventilation and purification technology in tunnel construction, and particularly relates to an integrated dust removal system during underground tunnel blasting construction. The system includes: a ventilation module, an air purification device, a gas sensor, a controller, and a power supply mechanism. The power supply mechanism includes a generator and an energy storage unit, as well as a municipal power grid, a solar power generation module, a compressed air energy storage module, and a geothermal power generation module connected to the generator and energy storage unit. The geothermal power generation module uses a supercritical CO₂ fluid and methanol heat exchange cycle to drive a turbine to generate electricity. The compressed air energy storage module stores energy during off-peak electricity consumption and releases energy to generate electricity during peak electricity consumption. The air purification device has a filter screen and a filter element sequentially installed at the air inlet, and a multi-stage liquid filtration assembly sequentially filled with washing liquid. Another filter element is installed at the exhaust end. The controller automatically adjusts the operating power of the ventilation module and the air purification device based on the gas sensor detection signal.

The invention discloses a new energy geothermal power generation cooperative operation method, and relates to the technical field of new energy, and the method comprises the steps: judging whether a to-be-measured distance between target new energy and target geothermal energy is smaller than a preset distance division interval value; if the to-be-measured distance is between the distance division interval values, a target transmission line between the target new energy and the target terrestrial heat is divided into a plurality of equal sections to obtain a first section line, if the to-be-measured distance is between the distance division interval values, the target transmission line is divided into sections which are three times of the first section line, and if the to-be-measured distance is greater than the distance division interval values, the target transmission line is divided into sections; if yes, performing section division of a six-time first section line on the target transmission line, obtaining a temperature loss correlation coefficient according to correlation influence change trend characteristics between historical environment temperature data and historical extra energy loss degree values in historical monitoring data, and performing error compensation on the initially set energy consumption predicted value according to the temperature loss correlation coefficient to obtain an initial energy consumption predicted value; the actual energy demand quantity is obtained, and power generation cooperative operation is conducted. The power generation efficiency can be improved.

A geothermal power generation system includes: gas-liquid separator; power generator; retention tank; re-injection line; re-injection pump; chemical agent injection port in the re-injection line between the retention tank and the re-injection pump; first chemical agent adding device to inject a chemical agent into the chemical agent injection port; branching section in the re-injection line on a downstream side relative to the re-injection pump as well as on a vertically upper side of the re-injection well, and to branch a flow of geothermal brine; first liquid analyzer; scale-piece collector; dissolving agent adding device; and controller to switch between an injection operation and injection stoppage of the chemical agent by the first chemical agent adding device and to switch between an injection operation and injection stoppage of the dissolving agent by the dissolving agent adding device, based on an analysis result of the first liquid analyzer.

The invention relates to the technical field of geothermal energy utilization, in particular to a hydrothermal / hot dry rock type geothermal power generation and comprehensive utilization system which comprises a unit for utilizing hydrothermal geothermal water and a unit for utilizing hot dry rock type geothermal water, the unit comprises a gas-liquid separator, a flash evaporator, a helium extraction membrane set and a steam turbine, and the unit comprises a gas-liquid separator, a flash evaporator, a helium extraction membrane set and a steam turbine. The unit comprises: an organic Rankine cycle generator set; a liquid outlet of the gas-liquid separator is connected with an inlet of the flash evaporator through a pipeline, a gas outlet of the gas-liquid separator is connected with an inlet of the helium extraction membrane set through a pipeline, and a liquid outlet of the flash evaporator exchanges heat with a heat regenerator of the organic Rankine cycle generator set. A gas outlet of the flash evaporator is connected with an inlet of the steam turbine through a pipeline, and an output shaft of the steam turbine drives the helium extraction membrane group.

To find out a new geothermal development area by correctly estimating the prospects of a pilot well candidate area including an area with a small amount of surface survey data.SOLUTION: An exploration well candidate position estimation system 1 for geothermal power generation using machine learning includes a model generation device 2 that generates a learned model for estimating an objective variable from an explanatory variable using teacher data including the explanatory variable including an ore deposit distribution, a quarternary volcanic distribution, and a hypocenter distribution, and the objective variable being an exploration promising place and an exploration unpromising place, and an estimation device 3 that estimates an exploration candidate position for geothermal power generation using the learned model.SELECTED DRAWING: Figure 1

The utility model belongs to the technical field of vortex tubes, and provides a CCUS ultra-supercritical carbon dioxide liquid cooling energy storage geothermal power generation double-vortex self-heating device which comprises a first vortex assembly, the first vortex assembly is welded through an airtight buckle and provided with a second vortex assembly, and Laval nozzles are welded to the first vortex assembly and the second vortex assembly in an airtight buckle mode. The carbon dioxide temperature of the CCUS liquid cooling energy storage geothermal power generation wellhead is increased, the expansion volume of the carbon dioxide is increased, the efficiency of a turbine generator is improved, the installed capacity of a turbine is increased, the energy consumption of the turbine is reduced, and heat energy is provided for clean heating of cities.

The device comprises a water suction pump, a water conveying pipe is fixedly connected to the right side of the water suction pump, at least two sets of processing mechanisms which can be online standby for each other are fixedly connected to the right side of the water conveying pipe, one set is in a running state, and the other set is in a standby state. The left side of the treatment mechanism is fixedly connected with a water pipe, the right side of the water pipe is fixedly connected with a control pump, each treatment mechanism comprises a treatment box, the left side face of the inner side of each treatment box is rotationally connected with a rotating frame, and the outer side of each rotating frame is movably sleeved with a filter screen cylinder; the two mechanisms are switched through an external valve, hot water and water supplementing and draining loops are alternated, and shutdown is not needed during maintenance; the liquid level sensor and the control pump supplement water in a closed loop mode, and geothermal water full-recycling circulation is formed. The functions of filtering, flash evaporation, water supplementing and slag discharging are achieved through the single cavity, redundancy of multiple cavities is omitted, and the system is suitable for various geothermal power stations.

The invention discloses a coupled power generation system and method based on geothermal ORC-LNG cold energy-seawater source multi-energy complementation, and belongs to the technical field of geothermal energy development and utilization and LNG cold energy utilization. The coupled power generation system comprises a geothermal ORC power generation system, an LNG gasification heating system and a heat supply system; the geothermal ORC power generation system is connected with the LNG gasification heating system, the geothermal ORC power generation system provides a heat source for the LNG gasification heating system, and the LNG gasification heating system provides a cold source for the geothermal ORC power generation system; and the geothermal ORC power generation system and the LNG gasification heating system are respectively connected with the heat supply system. According to the multi-energy complementary coupling power generation-gas supply system, the cold and heat requirements of ORC power generation condensation and LNG gasification are met at the same time, and on the premise that the natural gas supply requirement is met, the overall performance and efficiency of the power generation-gas supply coupling system are improved.

The invention discloses a geothermal ORC off-grid operation power supply system and a control method. The geothermal ORC off-grid operation power supply system comprises a geothermal ORC power generation unit. The energy storage battery unit comprises a storage battery pack and a bidirectional converter connected with the storage battery pack; the diesel power generation unit is used for providing backup power; the output end of the bidirectional converter of the geothermal ORC power generation unit, the output end of the bidirectional converter of the energy storage battery unit and the output end of the diesel power generation unit are electrically connected to the micro-grid bus so as to jointly supply power to a load connected to the bus; compared with the prior art, a system architecture in which the geothermal ORC power generation unit, the energy storage battery unit and the diesel power generation unit are connected in parallel to the same microgrid bus is constructed, multi-energy complementation is realized, a power supply structure of'a main power supply + two-stage standby 'is formed, and the power distribution control strategy of the geothermal ORC power generation unit, the energy storage battery unit and the diesel power generation unit is executed. The power supply reliability can be ensured, clean geothermal energy can be utilized to the maximum extent, and the operation cost is reduced.

The invention discloses a coal-fired power plant CO2 geological storage and enhanced geothermal power generation combined site selection design method. The method comprises the following steps: collecting CO2 emission data and geographic position coordinates of each coal-fired power plant in a target area; generating a coal-fired power plant spatial distribution diagram in the ArcGIS platform; collecting geological data of a hot dry rock occurrence prospective area in the same target area; delineating and generating a hot dry rock occurrence prospective area distribution map in the ArcGIS platform; the distance from each coal-fired power plant to the nearest hot dry rock occurrence prospective area is calculated, so that the optimal CO2 storage place is matched for each coal-fired power plant; and calculating the transportation cost of transporting CO2 from each coal-fired power plant to the matched hot dry rock occurrence prospective area, and integrating all information to form a site selection design scheme. The method is suitable for areas where hot dry rock resources are widely distributed, the coal-fired power plant CO2 geological storage and enhanced geothermal power generation combined technology in the areas can be achieved, and the CO2 emission of the areas is reduced.

This system provides a silica scale generation prediction system that can predict the amount of silica scale generated with greater accuracy. [Solution] The silica scale generation prediction system according to the present invention is based on the temperature T at the predicted site of the target object. s A prediction formula PF for silica concentration C, which depends on the silica concentration, and the time t until the silica-containing fluid reaches the predicted site. s The system includes a silica scale generation prediction unit that predicts the amount of silica scale generated at a predicted site based on at least one of the silica concentration C prediction curve PC which depends on the silica concentration C, wherein the silica concentration C prediction formula PF and the silica concentration C prediction curve PC are obtained based on a reaction model generated using a silica polymerization reaction that includes reversible and irreversible reactions and precipitation equilibrium reactions of silica contained in the fluid, and the silica scale generation prediction unit calculates the amount of silica scale generated at the predicted site using at least one of the initial silica concentration Ci and the fluid flow rate FR.

The utility model discloses an ORC (organic Rankine cycle) geothermal power generation comprehensive gradient utilization system, which relates to the technical field of ORC geothermal power generation and comprises a geothermal production well, a recharge well, a complete ORC generator set, a first-stage plate heat exchanger, a second-stage plate heat exchanger, a recharge water treatment device, a softened water tank, a water softener, a make-up pump, a cooling tower, a heat pump unit, a heat user side, a cooling circulating pump and a submersible pump. The complete ORC generator set comprises an evaporator, a preheater, a condenser, a generator and a working medium pump, a submersible pump is arranged in the production well, and the submersible pump is connected with the evaporator through a pipeline. According to the ORC geothermal power generation comprehensive gradient utilization system, a two-stage plate heat exchanger, a heat pump unit, a circulating water pump and other equipment are additionally arranged on the basis of traditional ORC geothermal power generation, the temperature utilization rate of geothermal water for geothermal power generation is increased, geothermal energy is converted into heat energy for heating to the maximum extent, and the heat supply capacity is improved.

The invention discloses a method for storing and releasing energy and obtaining geothermal energy through formation fractures of a non-communicated shaft. The method comprises the steps that an energy storage geothermal layer containing geothermal resources and not containing oil gas is recognized; high-pressure fluid is injected into a target shaft, so that a target artificial stratum fracture is generated, or a target original stratum fracture in a closed state in the target shaft in the energy storage geothermal layer is opened; normal-temperature high-pressure fluid is injected into the target wellbore, so that the width of the stratum fracture is increased, stratum rock is elastically deformed to store energy, and the fluid in the stratum fracture exchanges heat with the energy storage geothermal layer; when the width of the ground layer crack reaches the target width, the reverse exhaust pipeline is closed to enable the fluid to continuously exchange heat with the energy storage geothermal layer so that the fluid can store heat; and high-temperature and high-pressure fluid reversely discharged in the stratum fracture closing process is used for driving hydroelectric power generation equipment and geothermal power generation equipment to generate power, so that the obtained geothermal energy and the stratum rock elastic deformation energy are converted into electric energy to be released.

The LNG cold energy and geothermal energy coupling power generation system comprises a geothermal power generation module, an LNG cold energy power generation module and an LNG cooling module. An output port of an LNG storage tank of the LNG cooling module is connected with a first external interface of the combination valve; the combination valve can enable the first external interface to be communicated with any one, any two or all of the second external interface, the third external interface and the fourth external interface; the second external connector is connected with an inlet of the low-temperature side of a second heat exchanger of the LNG cold energy power generation module. The third external interface is connected with one end of a condenser low-temperature side of the geothermal power generation module; a fourth external interface is connected with an outlet of a low-temperature side of a third heat exchanger of the LNG cooling module and the natural gas output module through a three-way pipe; an outlet of the low-temperature side of the second heat exchanger is connected with an inlet of the low-temperature side of the third heat exchanger and the other end of the low-temperature side of the condenser through a three-way valve. The heat exchange efficiency and the power generation efficiency of the LNG cold energy power generation module are improved.

The present invention provides a control device, a control method, and a control program for a geothermal power plant, with which it is possible to accurately obtain the steam production amount of a well. Provided is a control device (50) for controlling a geothermal power plant that generates electricity, the geothermal power plant including a plurality of wells from which a geothermal fluid is ejected, and one separator that separates the geothermal fluid ejected from each well into steam and hot water. The control device (50) comprises an acquisition unit (51) that acquires information regarding each well, and an estimation unit (52) that estimates, for each well, a function expression indicating a correlation, from the wellhead pressure of the well, the pressure of the separator, the valve opening degree of a flow control valve of the well, and the flow rate of steam separated by the separator. The control device (50) activates a first well among the plurality of wells, the acquisition unit (51) acquires information regarding the first well, and the estimation unit (52) estimates a first function expression indicating the correlation of the first well. The control device (50) activates a second well while the first well is being activated, the acquisition unit (51) acquires information regarding the second well, and the estimation unit (52) estimates a second function expression indicating the correlation of the second well.

The invention discloses a method for storing and releasing energy and obtaining geothermal energy through artificial stratum cracks. The method comprises the steps that an energy storage geothermal layer containing geothermal resources and not containing oil gas is recognized; high-pressure fluid is injected into a target shaft, so that a target artificial stratum fracture is generated, or a target original stratum fracture in a closed state in the target shaft in the energy storage geothermal layer is opened; normal-temperature high-pressure fluid is injected into the target wellbore, so that the width of the stratum fracture is increased, stratum rock is elastically deformed to store energy, and the fluid in the stratum fracture exchanges heat with the energy storage geothermal layer; when the width of the ground layer crack reaches the target width, the reverse exhaust pipeline is closed to enable the fluid to continuously exchange heat with the energy storage geothermal layer so that the fluid can store heat; and high-temperature and high-pressure fluid reversely discharged in the stratum fracture closing process is used for driving hydroelectric power generation equipment and geothermal power generation equipment to generate power, so that the obtained geothermal energy and the stratum rock elastic deformation energy are converted into electric energy to be released.

The invention relates to the technical field of geothermal resource development and utilization, in particular to a geothermal power generation waste heat recovery system and method based on TEG, and the system comprises a wellhead extraction section, a flash evaporation power generation section, an ORC power generation section, a TEG waste heat recovery power generation section and a circulation recharge section. The total power generation efficiency of the system can be remarkably improved, the power generation capacity is improved by 13.89%-59.29% under the typical working condition, and the system is suitable for medium and low temperature geothermal resource development and energy efficiency upgrading of an existing power station.

A geothermal power generation system comprises: a heat collecting cover, comprising a cap and an opening, wherein the cap comprises a heat conducting layer, a thermoelectric conversion layer, and a heat dissipation layer, from inside to outside, wherein the opening faces a geothermal well; a thermometer, capable of measuring a collector temperature of the heat conducting layer; a lifter; a control circuit, controlling a height of the heat collecting cover apart from the geothermal well via the lifter according to the collector temperature.

This utility model discloses a combined LNG cold energy and geothermal energy power generation system, compared to existing technologies. It includes an LNG cold energy recovery subsystem, a geothermal circulation subsystem, and a cooling water system. The LNG cold energy recovery subsystem includes an LNG storage tank, an LNG cryogenic pump, a downstream user terminal, a second evaporator, a preheater, a second working fluid pump, a second turbine generator set, and a second condenser. The geothermal circulation subsystem includes a water extraction well, a geothermal water pump, a reinjection well, a first evaporator, a first working fluid pump, and a first turbine generator set. The cooling water system includes a cooling water pump and a first condenser. This utility model combines LNG cold energy power generation with geothermal power generation, effectively improving energy utilization while avoiding the limitations of a single energy source. Utilizing the cold energy from LNG vaporization lowers the condensation temperature of the ORC system, increases the system temperature difference, and improves power generation efficiency. Geothermal energy provides a heat source for LNG vaporization, reducing the environmental impact of traditional seawater heating.

Disclosed herein are silica scale reduction formulations and methods for online silica scale removal in geothermal systems. Specifically, methods for high pH silica scale cleaning in geothermal power plants such as a binary plant. The methods include adding to a brine a silica cleaning composition comprising an alkaline source, a silica inhibitor, and a chelant.

The application provides a wind-solar-electricity energy storage system based on the geothermal utilization principle, and relates to the field of geothermal power generation. The system comprises a power supply device, a heating device, a heat exchange device and a power generation device. The power supply device is used for storing the electricity generated by a wind energy generator set and a solar panel, and transmitting the electricity to a heating coil in a wellbore through an output cable. The heating device is used for heating the aquifer and the granite layer by the heat energy generated by the heating coil, and storing the heat energy. The heat exchange device is used for converting the heat energy of the aquifer and the granite layer into the internal energy of water, so as to obtain water or water vapor. The power generation device is used for converting the water or water vapor into high-temperature and high-pressure steam, and driving a steam turbine generator set to run for power generation. The electricity generated by the wind energy and the solar energy is used for heating the aquifer and the granite layer in the stratum, so that the heat source in the stratum is greatly improved, the production temperature of the heat exchange medium is improved, the required temperature of geothermal power generation is reached, and the geothermal power generation is realized.

To prevent a separated liquid containing impurities from being mixed into geothermal steam in a scrubber device for geothermal power generation.SOLUTION: A scrubber device 93 for geothermal power generation includes a treatment vessel 10 that separates geothermal vapor G1 into separated gas G2 and separated liquid S by treating the geothermal vapor G1 with a treatment liquid R, the treatment vessel 10 including an air supply hole 15 to which the geothermal vapor G2 is supplied and an exhaust hole 16 through which the separated gas 40A is discharged, a drain 30 that is provided below the treatment vessel 10 and through which the separated liquid S is discharged, and a cooler that cools a portion of the treatment vessel 10 between the air supply hole 15 and the drain 30.SELECTED DRAWING: Figure 2