65 results about "Cryogenic energy storage" patented technology

The present invention concerns systems for storing energy and using the stored energy to generate electrical energy or drive a propeller (505). In particular, the present invention provides a method of storing energy comprising: providing a gaseous input, producing a cryogen from the gaseous input; storing the cryogen; expanding the cryogen; using the expanded cryogen to drive a turbine (320) and recovering cold energy from the expansion of the cryogen. The present invention also provides a cryogenic energy storage system comprising: a source of cryogen; a cryogen storage facility (370); means for expanding the cryogen; a turbine (320) capable of being driven by the expanding cryogen; and means (340, 350) for recovering cold energy released during expansion of the cryogen.

Cryogenic energy storage systems, and particularly methods for capturing cold energy and re-using that captured cold energy, are disclosed. The systems allow cold thermal energy from the power recovery process of a cryogenic energy storage system to be captured effectively, to be stored, and to be effectively utilised. The captured cold energy could be reused in any co-located process, for example to enhance the efficiency of production of the cryogen, to enhance the efficiency of production of liquid natural gas, and/or to provide refrigeration. The systems are such that the cold energy can be stored at very low pressures, cold energy can be recovered from various components of the system, and/or cold energy can be stored in more than one thermal store.

The invention discloses an energy storage material composition formed by mixing eutectic salts with magnesium chloride, calcium nitrate and water as the principal components. The energy storage material composition is mainly prepared from water, magnesium chloride, calcium nitrate, sodium chloride, potassium chloride, basic magnesium carbonate and sodium carboxymethylcellulose, wherein the crystallization temperature is -48 to -52 DEG C, and the latent heat of fusion is more than 300 kJ/L.

The invention discloses a water storage power generation system using seabed pressure energy. The power generation system comprises a storage container, a seawater pumping energy accumulation unit and a pressure pipe; the storage container is arranged on a seabed, and includes a first opening end; the first opening end is connected to the pressure pipe; a valve is arranged on the pressure pipe; and the seawater pumping energy accumulation unit is arranged on the seabed, is connected to the pressure pipe, and includes fluid machinery connected with the pressure pipe and a motor/generator in transmission connection with the fluid machinery. The power generation system realizes electric energy storage by using a pressure difference in the seabed and the storage container without constructing high and low impounding reservoirs and being limited by geographical conditions; and the system uses seawater as a working medium for solving the dependency problem of traditional water pumping energy accumulation on fresh water resources. The system is suitable for power supplies with various types, environment-friendly and broad in application prospect.

The application relates to an combined heating power and cooling apparatus with energy storage for an active distribution network and its operating method. The apparatus is comprised of a generation apparatus, a generator, a waste heat recovering and absorbing heat pump, a high temperature flue gas-water heat exchanger, a medium temperature flue gas-water heat exchanger, a low temperature flue gas-water heat exchanger, a energy storing electric heat pump, a high temperature energy storing canister, a low temperature energy storing canister, a cooling tower a number of circulating water pumps and a number of valves. The operating method changes the traditional operation modes of the system “determining electricity based on heat” and “determining electricity based on cooling”, causes the system to regulate power of the generated electricity on grid, participate in the regulation of grid load, solve the problem of a limited ability of generation peak regulation due to the inter-coupling of power generation, heat supply and cooling supply.

The invention discloses a three-dimensional pulsating heat pipe phase change material coupling energy storage system. The structure comprises a plurality of energy storage sub modules, pulsating heat pipes, fins, energy storage boxes, a phase change material, a heat release runner, a heat charging runner and sealing gaskets, wherein the fins are distributed at the upper, middle and lower parts of the pulsating heat pipes; the fins are arranged inside the heat release runner, the energy storage boxes and the heat charging runner; and the energy storage boxes are filled with the phase change material. According to the system, the high thermal conductivity, flexible structure and low cost advantages of the pulsating heat pipes and the high latent heat advantage of the phase change material are reasonably combined together, the structure is simple and compact, the system shape can be flexibly changed according to the actual structure, the plurality of sub modules can be connected to form a large energy storage system, after proper combination and design, the plurality of sub modules are applicable to recycling and utilization of various industrial waste heat, and the system has wide market prospects and environmental protection value.

The invention discloses a thermal control method in a hydrogen energy storage system, and a control system thereof. The thermal control method comprises following steps successively: S1, water electrolysis is carried out so as to produce hydrogen; S2, the produced hydrogen is stored; S3, the produced hydrogen is released; and S4, the hydrogen is used for electricity generation; and at the same time, heat energy released in one or a plurality of steps of the steps S1, S2, and S4 is collected, and the step S3 is provided with the collected heat energy. The thermal control method and the corresponding control system are capable of adjusting heat energy supply-demand relation among hydrogen preparation, hydrogen storage, and hydrogen electricity generation subsystems, increasing heat energy utilization ratio of the hydrogen energy storage system, and ensuring stable and orderly running of the hydrogen energy storage system via in time adjusting of the heat energy supply-demand relation among the subsystems.

A liquid-nitrogen assisted energy storage tower type solar power plant comprises a tower, a reflector field, a heat absorber, a high temperature temperature-difference engine, a first generator, a low temperature energy storage tank, a high temperature energy storage tank, a low temperature temperature-difference engine, a second generator and a liquid nitrogen storage tank, wherein the tower, the reflector field, the heat absorber, the high temperature temperature-difference engine, the first generator, the low temperature energy storage tank and the high temperature energy storage tank form a solar power plant having energy storage functions and working during the day, and the low temperature energy storage tank, the high temperature energy storage tank, the low temperature temperature-difference engine, the second generator and the liquid nitrogen storage tank form a liquid nitrogen cooled energy storage type power plant which works during night. The liquid-nitrogen assisted energy storage tower type solar power plant improves power generating efficiency and the power generating capability during the night by utilizing nitrogen, makes 24-hour uninterrupted power supply technically possible, and eliminates the interruption of the solar power generating. The liquid-nitrogen assisted energy storage tower type solar power plant can rapidly lowers the solar power generation cost, and facilitates application and popularization of solar power generation.

The invention provides a layered cold storage device and a cryogenic liquid air energy storage system using the same. The layered cold storage device comprises at least two cold storage units, the adjacent cold storage units are connected through a cold conveying passage in series, and at least one cold storage unit is collected with the cold energy output end. In the cold storage process, overflowing cold energy in the cold storage process of the former stage of cold storage unit enters the later stage of cold storage unit through the cold conveying passage and is used for pre-cooling of the later stage of cold storage unit, the tail gas released in the former stage of cold storage unit still contains certain cold energy, after pre-cooling the later stage of cold storage unit, the cold energy in the tail gas can be exchanged with cold storage media in the cold storage unit to a large extent, and therefore the cold energy storage efficiency can be greatly improved, and waste of the cold energy is avoided.

A solar heat storage power generating system utilizing surface soil resources of other planets comprises a solar reflector, a tracking control system, a solar absorber, a high-temperature energy storage device, a low-temperature energy storage device, a thiele tube, a heat engine, a pump, a heat radiator, a power source management device and a storage device. The solar reflector, the tracking control system and the solar absorber enable solar energy to be gathered on the high-temperature energy storage device, and the high-temperature energy storage device is prepared through the surface soil resources of other planets. After sun radiation heat is absorbed and stored in day time, a temperature difference exists between the high-temperature energy storage device and the low-temperature energy storage device, heat energy is converted into electric energy through the heat engine, and therefore uninterrupted supply of electric energy and heat energy can be achieved day and night. By the adoption of the technical scheme, the emission mass and the operating expense are greatly reduced, and the solar heat storage power generating system has the advantages of being stable, durable, economical and safe, capable of meeting the demands for energy for science exploration instruments and staff life support in deep space exploration tasks.

The invention provides a wind-driven magnetocaloric energy storage peak regulation type wind power generation system. A wind power driving system is used for directly driving a power generator to generate electricity to meet the real-time electricity demands. Excessive wind energy is subjected to power dividing through a transmission system of a wind power driving system to drive a magnetic forcecoupling heating system to convent wind energy into heat energy to heat a heat storage medium. The high-temperature heat storage medium can be stored in a high-temperature energy storage tank for standby application. When electricity generated by wind power generation cannot meet the real-time electricity demands, the high-temperature heat storage medium in the high-temperature energy storage tankconducts heat exchange through a steam generator. A low-temperature liquid medium flowing through the steam generator absorbs heat of the high-temperature heat storage medium to become gaseous high-temperature steam. The high-temperature steam drives a steam turbine. The steam turbine drives the power generator to generate electric energy. The wind-driven magnetocaloric energy storage peak regulation type wind power generation system comprises the following key parts including the wind power driving system, a heater, the high-temperature energy storage tank, a low-temperature energy storage tank, the steam generator, the steam turbine, the power generator, a condenser, a deaerator and all types of pumps.

The invention provides a method and device for storing redundant heat of a greenhouse and preventing high temperature of the greenhouse. According to the method, after the temperature in the greenhouse is higher than a specific temperature, redundant heat in the greenhouse is absorbed through low temperature energy-storing materials such as hydrated salts having a low temperature melting point, the temperature of the greenhouse is controlled below a phase-change temperature of the low temperature energy-storing materials, the temperature of the greenhouse is prevented from rising too quickly, and plants in the greenhouse in summer are protected from damage caused by the high temperature. Sunlight and high temperature of bare land of the greenhouse are absorbed through the energy-storing materials such as the low temperature hydrated salts and high-density crosslinked polyethylene, residual heat of the environment is transmitted to cold storage materials such as hydrated salts through thermal good conductor materials; after the energy-storing materials absorb heat, fusion or phase change of other types occurs; before complete fusion, the temperature is always kept at a melting point, and an inhibiting effect on plant growth caused by too quick temperature rise in the greenhouse is greatly reduced.

The invention relates to the technical field of heating, and particularly provides a solar energy, electromagnetic energy and phase-change energy storage coupled heating control system comprising a solar thermal collector, a low-temperature phase-change energy storage water tank, a high-temperature phase-change energy storage water tank, an electromagnetic heater, a heat user side and a PLC. The solar thermal collector communicates with the low-temperature phase-change energy storage water tank through a first circulation pipeline. The low-temperature phase-change energy storage water tank is connected with the high-temperature phase-change energy storage water tank through a heat exchange water return pipe and a conveying pipeline. The high-temperature phase-change energy storage water tank is connected with the heat user side through a second circulation pipeline. The electromagnetic heater is connected with the high-temperature phase-change energy storage water tank through a third circulation pipeline. The solar thermal collector and the electromagnetic heater are connected with the PLC. By means of the heating control system, solar energy and electromagnetic energy are supplied in a stepped manner, it is ensured that the heat supply effect of the heat user side is stable, system operation expenses are extremely low, and the heating system can be safer, can save more energy and is more economical and reasonable.

The embodiment of the invention discloses a distributed cooling, heating and power combined supply system, and relates to the technical field of energy treatment. The system comprises a gas turbine power generator set, a gas internal combustion engine power generator set, an ORC equipment power generator set, a slot type solar heat collecting field, an absorption type refrigerator, a multipurpose heat exchanger, a first heat exchanger, a second heat exchanger, a third heat exchanger and a plurality of valves. A high-temperature energy storage system, a low-temperature energy storage system, a gas boiler and a compression type refrigerator are further included. A gas turbine and a gas internal combustion engine are combined, the gas turbine continuously runs to be responsible for providing basic power loads, and the gas internal combustion engine serves as a peak regulating unit. By means of the distributed cooling, heating and power combined supply system, fuel consumption can be reduced, gradient utilization of the energy is achieved, and reliability and energy saving performance of the distributed cooling, heating and power combined supply system are further improved. Gas turbine inflow air is cooled in summer, and the generating capacity of the gas turbine is improved; and gas turbine inflow air is heated in winter, and accordingly the phenomenon of ice blockage of an air inlet system is reduced.

The invention relates to an efficient recovery device of an industrial high-temperature material sensible heat system and method. The system comprises an energy storage material heat absorption and exchange unit, wherein a third outlet for allowing a high-temperature energy storage material to flow out is arranged on the energy storage material heat absorption and exchange unit and is connected with an energy storage material heat release and exchange unit; the energy storage material heat absorption and exchange unit is in serial connection with the energy storage material heat release and exchange unit; a third inlet for allowing a low-temperature energy storage material to flow in is arranged on the energy storage material heat absorption and exchange unit; and an inlet of a first energy storage material flow regulator is connected to an outlet of the energy storage material heat release and exchange unit to form a circulation loop. The system and the method have the beneficial effects that the sensible heat exchange efficiency is improved by about 60%, so that the problem of sensible heat waste of high-energy-consumption enterprises is fundamentally solved, and great economic benefits and social benefits are created for all high-energy enterprises.

The invention relates to a low-temperature phase-change energy-storage electric heater which comprises a phase-change material container, a heating plate, a heat preservation and insulation layer, anouter frame and a temperature controller. A phase-change material is filled in the phase-change material container; a melting point range of the phase-change material is 50 to 70 DEG C; the latent heat of fusion is larger than 200kJ/kg; the heating plate is located on the outer side of the phase-change material container and is externally connected with a power supply so as to be used for heatingthe phase-change material; the heat preservation and insulation layer is located on the outer side of the heating plate and is used for preserving heat and providing safety protection; the outer frameis located on the peripheries of the heat preservation and insulation layer, the heating plate and the phase-change material container and plays a role in supporting; and the temperature controller is located on the outer frame and is used for connecting the power supply and the heating plate so as to control the heating of the heating plate. According to the low-temperature phase-change energy-storage electric heater provided by the invention, an effect on storing energy at low temperature is achieved by utilizing phase change, and the energy storage temperature range is 50 to 70 DEG C, so that the potential safety hazard is low. The energy storage density is large, and energy is stored by utilizing the phase change and specific heat, so that more energy can be stored under the same volume and weight according to the low-temperature phase-change energy-storage electric heater provided by the invention compared with an existing electric heater for storing energy by simply specific heat.