279 results about "Thermal reservoir" patented technology

Providing a method for assessing the impact of fragile structures on large-scale fracturing in deep thermal reservoirs "Solution: Based on a precise depiction of the fragile structure of the formation and a study of its mechanical properties, the spatial distribution of the structure is determined, well locations and networks are arranged, fracturing zones are selected, and the fracturing suitability of the formation is comprehensively evaluated. Furthermore, a thermal-fluid-solid coupled damage model and a thermal-fluid-solid-chemical coupled damage model are established to study the activation conditions of the original fragile structure surface, and the fluid filtration characteristics of the structure and the maximum discharge volume that can be safely fractured are evaluated. Based on this, triaxial fracturing physical simulations and numerical simulations are carried out to clarify the influence laws of the fragile structure surface on the expansion and seepage flow of fracture cracks, and to clarify the influence mechanism of the fragile structure on large-scale fracturing of the formation under high temperature and pressure conditions."

The invention discloses an earthquake and electromagnetic joint inversion analysis method, belongs to the technical field of geological exploration, and can solve the problem that accurate judgment on geothermal resources is affected due to the fact that an existing single exploration method is difficult to obtain fine structural information and attribute information of a thermal reservoir. The method comprises the following steps: S1, constructing a multi-attribute geological model of a target area according to geological survey data of the target area, and respectively performing seismic exploration and electromagnetic exploration on the target area according to exploration working parameters of the target area to obtain seismic wave observation data and apparent resistivity observation data; s2, according to the multi-attribute geologic model and the exploration working parameters, seismic wave forward modeling and electromagnetic wave forward modeling are carried out on the target area, and seismic wave forward modeling data and apparent resistivity forward modeling data are obtained; and S3, determining a target geologic model of the target area according to the seismic wave observation data, the seismic wave forward modeling data, the apparent resistivity observation data and the apparent resistivity forward modeling data. The method is used for geothermal resource exploration.

The invention discloses a medium and low temperature geothermal well drilling and completion optimization method and system. The method comprises the steps that a drilling equipment efficiency model (input energy and output footage) and a thermal reservoir response model (input parameters and output productivity indexes) are constructed, a full-process optimization model is established based on the two models, a drilling cost minimization and thermal reservoir productivity maximization function is taken as a target, decision variables comprise parameters such as energy input and a well bore structure, and a full-process optimization model is established. And iteratively solving and dynamically controlling the operation through a Benders decomposition algorithm. The system comprises an equipment efficiency modeling module, a heat storage response modeling module, an optimization solution engine module, a dynamic control terminal module and the like, the functions of well bore structure design, drilling process parameter generation, well completion sealing scheme decision making and the like can be achieved, and closed-loop optimization is formed. The method improves the drilling efficiency and productivity, reduces the cost and is suitable for medium and low temperature geothermal resource development.

The invention relates to the technical field of model construction, in particular to a geothermal field three-dimensional model construction method based on point cloud data, and the method comprises the steps: synchronously collecting a surface laser radar point cloud, an underground sound wave point cloud and a rock core scanning point cloud, the underground sound wave point cloud comprising signal attenuation coefficient data; performing cover layer signal compensation on the enhanced point cloud data set, inverting a permeability field based on rock core fracture characteristics, and outputting a shadow correction point cloud data set; and inputting the shadow correction point cloud data set into a permeability constraint modeling algorithm to generate a three-dimensional geologic model comprising a heat storage top interface and dynamic permeability distribution. By introducing a three-dimensional voxel modeling method based on point cloud data, the precision and resolution of structural modeling of the heat storage area are effectively improved, an equivalent heat conductivity model for average permeability adjustment and a Darcy flow velocity item are fused, a heat flow evolution equation set refined to a voxel level is constructed, and the modeling precision and resolution of the heat storage area structure are improved. And the depicting capability of the heat flow behavior of the high-temperature gradient region is obviously improved.

The invention belongs to the technical field of slag waste heat recovery and comprehensive utilization, and particularly relates to a copper slag waste heat recovery system and a waste heat recovery method thereof. Comprising a slag ladle, a granulating bin is arranged at a slag outlet of the slag ladle, a spray gun is arranged in the granulating bin, and a revolving cup device is arranged on the spray gun; an outlet of the granulation bin is connected with a boiler, the boiler is connected with a waste heat boiler and a pyrolysis gasification furnace, and the boiler is connected with the waste heat boiler and the pyrolysis gasification furnace; the waste heat boiler is connected with power generation equipment, low-pressure steam generated after power generation of the power generation equipment is used for heating the user heat storage device, and condensate water generated by heating of the user heat storage device enters the boiler. The first hot air in the granulation bin enters the waste heat boiler, and superheated steam generated by the boiler enters the power generation equipment. The granulation method combining gas quenching and centrifugation is adopted, high-temperature gas and superheated steam at different temperatures are obtained through air and water cooling in different environments, the high-temperature gas and the superheated steam are specifically applied to a pyrolysis gasification furnace and a waste heat boiler, and efficient utilization of copper slag waste heat is achieved.

The invention discloses a geothermal water layer quality rapid identification method and system based on an algorithm model, belongs to the technical field of geological exploration, and aims to correct logging curve data of a thermal reservoir research well area, effectively avoid possible system errors in a logging data acquisition process, including improper operation modes or instrument self-measurement errors and the like. Standardized logging data can more remarkably reflect regional geologic features compared with original data, principal component analysis is conducted on sample data through a PCA method, an original sample space is reconstructed according to the contribution rate of principal components, the dimensionality of an input space is effectively reduced, meanwhile, the correlation between variables of the input space is eliminated, and the accuracy of the input space is improved. The identification precision is improved; according to the method, the recognition accuracy is greatly improved, a more scientific and reliable method is provided for well logging data thermal reservoir recognition, and the method has practical significance in exploring geothermal resource development.

The invention relates to the technical field of geothermal resource evaluation, in particular to an oil and gas field geothermal resource evaluation method which comprises the following steps: S1, establishing a basic database of a thermal reservoir section of a research area; s2, establishing a three-dimensional space structure model of the thermal reservoir section of the research area; s3, establishing a lithofacies model of the thermal reservoir section of the research area; s4, establishing a phase control porosity model of the thermal reservoir section of the research area; s5, establishing a temperature field model of the thermal reservoir section of the research area; s6, establishing a heterogeneous water saturation model of the thermal reservoir section of the research area; and S7, carrying out space superposition on the models, obtained in the steps S2-S6, of the thermal reservoir section of the research area to obtain a geothermal resource evaluation model, then calculating the total geothermal resource quantity in the geothermal resource evaluation model, and finally obtaining the recoverable geothermal resource quantity. The method can accurately describe the physical and thermal properties of the geothermal reservoir, so that the geothermal resource evaluation result is closer to the actual situation.

The invention provides a geothermal well group arrangement method for a cross-seasonal underground heat storage system, and belongs to the technical field of underground heat storage. The method comprises the following steps: acquiring geophysical exploration data of a thermal reservoir area of a research plot; the geophysical exploration data are analyzed, initial arrangement point positions of cold well clusters and hot well clusters are determined, the cold well clusters are arranged in an inner circle area of a first concentric circle, the hot well clusters are arranged in an outer circle area of the first concentric circle, the inner circle area comprises an inner circle boundary, and the outer circle area comprises an outer circle boundary; determining a hot and cold well thermal breakthrough distance and setting a distance between an inner circle and an outer circle of a first concentric circle; and performing energy storage evaluation on the underground heat storage system corresponding to the initial arrangement point location, and if an evaluation result does not meet a preset requirement, iteratively changing the arrangement point locations of the cold well and the hot well cluster until the evaluation result meets the preset requirement. According to the method, the arrangement of the geothermal well group of the large-scale cross-season underground heat storage system, which saves the system construction cost and effectively prevents the heat breakthrough phenomenon, is realized.

The invention provides a geothermal resource surface geochemical exploration method and system, and the method comprises the steps: determining a matched net degree according to an exploration area range, collecting gas in soil and soil samples, and determining the gas components and element compositions of the samples through different devices; the influence of the formation reaction is considered, and gas and elements with the migration capacity and anti-interference performance meeting the requirements are selected as geothermal chemical exploration indexes of different formation types; the content of soluble inorganic salt in the stratum and the content of gas in the stratum are measured, and the position where heat storage exists is recognized in combination with the set high-salt and low-gas area; and calculating a cover layer score and a reservoir layer score based on geothermal chemical exploration indexes, further calculating a comprehensive score, and realizing quantitative rating of the thermal reservoir stratum according to the comprehensive score. By adopting the scheme, the problems of insufficient comprehensiveness and insufficient exploration precision in the prior art are solved, the optimization of reliable indexes is realized, a heat storage and cover layer comprehensive evaluation method system is formed based on a heat storage mode of high salt and low gas, and underlying stratum geothermal resources can be effectively tracked.

The invention discloses an underground enhanced heat exchange method for a closed heat removal system, and belongs to the field of geothermal energy development and utilization. A vertical well is drilled according to the depth and thickness of a heat reservoir, a casing pipe is put down and well cementation is carried out, a central heat preservation pipe is arranged in the casing pipe, and an annular space between the casing pipe and the central heat preservation pipe forms a vertical well annulus; casing lateral windowing is carried out on the vertical well section corresponding to the thermal reservoir, a plurality of branch well holes are drilled, or volume fracturing is carried out to form micro cracks; filling a high-thermal-conductivity material in the multilateral well hole / microcrack, transforming the thermal reservoir and supporting the transformed space to form a high-thermal-conductivity area in the thermal reservoir, and plugging the lateral multilateral well hole to complete the transformation of the thermal reservoir; a heat exchange working medium is injected through a high-pressure pump through a vertical well annulus, is pumped out of the central heat preservation pipe after being subjected to closed type sufficient heat exchange with the transformed heat storage layer, and geothermal energy utilization is achieved through the heat exchanger. The defects of a traditional closed heat removal system are remarkably overcome, the heat removal temperature is increased, the heat removal service life is prolonged, and development and utilization of medium-deep geothermal energy are accelerated.

The invention provides a condensation-evaporation-phase change heat reservoir based on a two-stage heat pump, and relates to the technical field of heat storage and heat exchange design, the condensation-evaporation-phase change heat reservoir comprises a heat storage module, a pipeline module and a heat pump module, the pipeline module is connected with the heat storage module and the heat pump module, and the heat pump module is connected with the heat storage module. The condensation-evaporation-phase change heat storage device is coupled to the condensation side of the first-stage heat pump and the evaporation side of the second-stage heat pump and has the functions of condensation, evaporation and phase change heat storage / release, and in the heating-heat storage stage, the first-stage heat pump takes heat from a low-temperature heat source, condenses and releases heat in the condensation-evaporation-phase change heat storage device and stores heat at the same time; and in the heat release-heat supply stage, heat is released by the condensation-evaporation-phase change heat reservoir and is absorbed by the second-stage heat pump evaporator, and higher-temperature heat energy is prepared. The cascade phase change heat storage and heat pump two-stage compression are combined, the heat exchange efficiency is improved through cascade heat storage / release, and the cascade phase change heat storage heat pump has the characteristics of time-sharing operation, flexible heat supply and large temperature rise.

The invention discloses an underground water flow field simulation method, an underground water flow field simulation device, underground water flow field simulation equipment and a computer readable storage medium, and the method comprises the steps: carrying out the collection of multi-source geological data based on drilling basic information, a digital elevation model and a hydrogeological map, and obtaining the multi-source geological data; constructing a three-dimensional geological model based on the multi-source geological data to obtain a three-dimensional geological entity model; performing aquifer recognition based on the profile information of the three-dimensional geological entity model to obtain aquifer spatial distribution; performing groundwater flow field analysis based on the aquifer spatial distribution to obtain groundwater flow field data; and performing model construction based on the groundwater flow field data to obtain a groundwater flow field model. The integrated simulation method for fine description of stratums, automatic identification of aquifers, flow field feature analysis and comprehensive evaluation of thermal reservoirs is realized, so that the precision and efficiency of geothermal resource exploration evaluation are improved.

The invention provides a shell-and-tube phase change heat storage system for a nuclear reactor containment and a nuclear accident heat energy management method, and belongs to the technical field of nuclear safety engineering and heat energy storage. The problems that an existing shell-and-tube heat reservoir is designed for industrial waste heat recovery and is not suitable for nuclear accidents, and the internal space structure of a containment is complex and limited are solved. The heat storage units are distributed in parallel, and each heat storage unit comprises a shell and a plurality of heat exchange tube bundles arranged in the shell; the heat storage unit has an interchangeable heat storage medium arrangement mode which comprises the first mode that the space in the heat exchange tube bundle is filled with a phase change material, and accident steam flows through a shell side channel between the shell and the heat exchange tube bundle; in the second mode, the shell side space between the shell and the heat exchange tube bundle is filled with the phase change material, and accident steam flows through an in-tube channel of the heat exchange tube bundle; and the accident steam passively flows through the channel which is not filled with the phase change material under the driving of the pressure difference. The method is used in the phase-change heat storage field.

A multi-source ground-to-air heat transfer system is configured to store thermal energy during a cooling / dehumidifcation mode of operation for future use during a heating mode of operation. The multi-source ground-to-air heat transfer system utilizes a ground loop that is configured under an enclosure, such as a greenhouse, and is in thermal communication with a thermal reservoir medium to conduct and store heat. A thermal exchange fluid is pumped through the ground loop and ground heat exchanger and may receive heat from a condenser during a cooling / dehumidification mode of operation and may liberate heat to the evaporator during a heating mode. The enclosure air may receive heat from the heat pump during a heating mode and may liberate heat to the evaporator during a cooling / dehumidification mode. The heat exchange system may employ a heat pump having a reversing valve to change the mode of operation.

The invention discloses a double-storage combined cooling and heating system, which relates to the technical field of combined cooling and heating, and comprises a variable frequency heat pump, a cold storage device, a heat storage device, a cooling capacity management unit, a heat management unit and a central controller, the variable frequency heat pump is suitable for various energy sources and provided with a cold side heat exchange channel and a hot side heat exchange channel which are independently arranged and connected to the cold storage device and the heat storage device respectively. The cold storage device communicates with the cold quantity management unit and the heat quantity management unit through circulating pipelines; the central controller is electrically connected with the variable-frequency heat pump, the cooling capacity management unit and the heat management unit, and energy storage priority control logic is arranged in the central controller and used for controlling start, stop and operation modes of the variable-frequency heat pump according to the temperature states of the cold storage device and the heat storage device; according to the system, cold and heat independent and combined energy supply can be achieved, the energy efficiency is improved, the operation cost is reduced, and the energy saving performance and intelligent control are improved; the technical problems that an existing heat pump system is difficult to flexibly achieve cold and heat combined supply, energy is wasted, and the overall energy efficiency is low are solved.

The present invention discloses an energy storage type high-temperature heat pump steam generation system, which includes a cascade high-temperature heat pump module, a phase change heat storage module and a steam generation module. The cascade high-temperature heat pump module includes a first closed circulation loop formed by connecting in series an air source evaporator, a low-stage compressor, a low-stage electronic expansion valve and the low-temperature side of an inter-stage heat exchanger, and a second closed circulation loop formed by connecting in series a high-stage compressor, a condenser, a high-stage electronic expansion valve and the high-temperature side of the inter-stage heat exchanger; the phase change heat storage module includes a heat storage tank, a heat storage working medium, a heat exchange tube, a first three-way valve, a second three-way valve and a high-temperature circulation pump; the steam generation module includes a flash tank and a steam compressor. By adopting the above technical solution, during the valley electricity period, low-cost electric energy and environmental heat energy are fully utilized for heat charging and energy storage; during the peak electricity period, the stored heat energy is released for steam production, achieving the maximization of economic benefits. The present invention also provides a control method for the energy storage type high-temperature heat pump steam generation system.

The invention discloses a bionic self-regulation heat reservoir which comprises a shell, a heat exchange pipeline, strengthening fins and an external ultrasonic module. The heat exchange pipeline is arranged in the center of the shell, and the two ends of the heat exchange pipeline are an inlet and an outlet. The strengthening fins are evenly arranged on the periphery of the heat exchange pipeline and are designed to be of a constituent arrow structure, the main vein and the trunk meridian of a bionic self-blade are arranged, the forked length and thickness of the adjacent layers meet the self-similarity law, non-uniform semi-open and semi-closed holes are further formed in the fins, and the hole diameter and the hole density change in a stepped mode in the gravity direction. The external ultrasonic modules are arranged on the outer wall of the shell in the gravity direction in a stepped mode. Through the collaborative design of the fractal arrow-shaped reinforced fins and the non-uniform semi-open and semi-closed hole array and in combination with the external gradient ultrasonic module, the heat transfer efficiency and the heat storage and release rate of the phase change material are remarkably improved, and the purpose of self-adaptive convective heat transfer regulation is achieved by means of self-driven thermal deformation of the shape memory material; and the heat storage performance and stability of the system under different working conditions are improved.

The invention belongs to the technical field of geological storage of CO2, and particularly relates to a system and a method for mineralizing and storing CO2 by utilizing geothermal tail water. The invention discloses a system for mineralizing and sealing CO2 by utilizing geothermal tail water. The system comprises a CO2 mixing device and a geothermal water treatment device, a tail water inlet, a gas inlet and a liquid outlet are formed in the CO2 mixing device; the geothermal water treatment device is a geothermal heating or geothermal power generation device and is provided with a geothermal water inlet and a tail water outlet; the tail water inlet is communicated with the tail water outlet through a tail water conveying pipeline, the gas inlet is communicated with the CO2 gas collecting device through a gas pipeline, and the liquid outlet is communicated with the injection well through a liquid pipeline; the CO2 gas collecting device is connected with one end of a CO2 pipeline, the other end of the CO2 pipeline extends into the injection well, and a CO2 ejector is fixed in the injection well; and the geothermal water inlet is communicated with the geothermal water mining well through a pipeline. According to the system and method, geothermal resources in deep karst heat storage are exploited, and the requirement of the society for clean energy can be met.

A technique increases the round-trip efficiency (“RTE”) of a pumped thermal energy storage system by changing the coefficient of performance (“COP”) and efficiency of the cycles by changing the temperature ratios of each, which is accomplished by using two separate low temperature reservoirs (“LTRs”) that are at different temperatures. More particularly, the disclosed technique accomplishes this by using a low-temperature thermal reservoir during the charging process that is at a higher temperature than the generating cycle's low-temperature thermal reservoir. The low-temperature thermal reservoirs are “decoupled” and “independently existing”, in that their temperature and utilization are independent of one another. In general, decoupled and independently existing reservoirs may also be different in their independent reservoir media, reservoir location, and heat exchangers.

In one embodiment, a heat storage power generation system includes a heater configured to heat first heat transfer fluid. The system further includes a heat storage including a heat storage material heated by the first heat transfer fluid, and configured to heat second heat transfer fluid with heat stored in the heat storage material. The system further includes a power generator configured to generate electric power by using the second heat transfer fluid. The system further includes one or more temperature meters configured to measure internal temperature of the heat storage. The system further includes a power generation controller configured to control power generation performed by the power generator, based on the internal temperature measured by the temperature meters.

The invention discloses a phase change energy storage enhanced ammonia gas turbine and steam turbine coupling power generation system. Liquid ammonia is divided into two paths through a three-way node; liquid ammonia of one branch sequentially flows back to a liquid ammonia source through the boiler, the ammonia steam turbine power generation assembly and an ammonia steam channel of the cooler; the liquid ammonia of the other branch sequentially passes through the cooling channel of the cooler, the ammonia channel of the intercooler and the ammonia decomposition reactor to enter the combustor; the sucked atmosphere is compressed by the air supercharging assembly, exchanges heat for an ammonia channel of the intercooler, is compressed by the gas turbine power generation assembly and then is input into the combustion chamber to be mixed with hydrogen obtained by the reaction channel; flue gas generated by combustion of the combustor is conveyed to the gas turbine power generation assembly for power generation, the flue gas exhausted after power generation sequentially flows through the flue gas channel of the ammonia decomposition reactor, the air pressurization assembly and the phase change heat storage device, and liquid ammonia in the boiler is gasified through the phase change heat storage device. According to the invention, single ammonia fuel and working medium are adopted, the system is simplified, and the comprehensive energy efficiency of ammonia energy reaches 80-85%.

A heating module (1) is disclosed, comprising: a heat pump (2) configured to extract heat from a reservoir (6) by expending technical work and supplying it as usable heat to a heating circuit (8), and an electric heater (4) configured to supply usable heat to the heating circuit (8). The heating module (1) is configured such that it can be integrated into or connected to the heating circuit (8). Furthermore, a vehicle, a household appliance, and a building heating system incorporating the heating module (1) are disclosed.

The invention discloses a multi-construction-unit thermal storage conceptual model construction method, a multi-construction-unit thermal storage conceptual model construction device, multi-construction-unit thermal storage conceptual model construction equipment and a computer readable storage medium, and the method comprises the steps: carrying out the formation unit division processing of a standardized logging data set based on the logging response characteristics of formation units; obtaining a stratigraphic unit division result; fault structure unit identification is carried out based on the standardized logging data set and the stratigraphic unit division result, and a fault structure unit data set is obtained; based on the standardized logging data set, the stratigraphic unit division result and the well temperature logging curve, thermal reservoir identification is conducted, and a thermal reservoir parameter set is obtained; and based on the stratigraphic unit division result, the fault structural unit data set and the thermal reservoir parameter set, multi-structural unit space relation modeling is carried out, and a structural unit space relation model is obtained. The accuracy of constructing the multi-construction-unit heat storage conceptual model is improved, and accurate characterization of the heat storage system under the complex construction condition is achieved.