10results about How to "High heat storage density" patented technology

The present invention provides a coal-fired power generation system coupled with steam energy storage and an operation method, which belong to the technical field of coal-fired power generation. The coal-fired power generation system coupled with steam energy storage comprises: a coal-fired power generation component, wherein the coal-fired power generation component comprises: a coal-fired boiler, a high-pressure steam turbine, a medium-pressure steam turbine, a low-pressure steam turbine, a condenser, a deaerator and a high-pressure heater which are connected and arranged; a steam energy storage component, wherein the steam energy storage component comprises: a gas storage tank; the coal-fired power generation system coupled with steam energy storage of the present invention improves the peak-shaving and frequency-regulating capabilities of the coal-fired unit.

The invention discloses a cross-season heat storage and release system for cyclic conversion of calcium hydroxide and calcium oxide and a working method. Cross-season conversion and efficient utilization of electric energy are achieved. Comprising an electromagnetic rotary kiln, a quicklime digester, calcium oxide powder and calcium hydroxide powder, the electromagnetic kiln is composed of a rotary cylinder (24) and an electromagnetic heating cover (25); the quicklime digester is formed by sequentially connecting a first-stage spiral conveying stirrer (1), a second-stage spiral conveying stirrer (2) and a third-stage spiral conveying stirrer (3) end to end; based on the structure of a quick lime digester used in the traditional building material industry, the chemical heat pump principle that calcium oxide is converted into calcium hydroxide when meeting water and releases heat is taken as the reference, the purpose of generating high-temperature steam is achieved, and meanwhile, high-purity calcium hydroxide is generated; and full excitation of chemical reaction heat energy and full extraction and utilization of heat release energy are realized.

The present invention belongs to the technical field of preparation of heat storage composite materials, and specifically relates to a self-repairing heat storage composite material and a preparation method thereof. The method of the present invention is to add an oil phase to an aqueous phase, mix them evenly, add a cross-linking agent, and gel the emulsion, that is, to prepare the heat storage composite material; the oil phase is a phase change material; the aqueous phase is a mixture of a water-soluble polymer and water; the volume ratio of the oil phase to the aqueous phase is about 0.4-1:1. The cross-linked structure of the self-repairing heat storage composite material described in the present invention is reversible, can self-repair damaged areas under external force damage, can be reused, the heat storage performance of the material does not change significantly, and the mechanical properties are excellent, which is better than most current heat storage composite materials.

The invention discloses a preparation method of a composite phase change fiber, the composite phase change fiber and application of the composite phase change fiber, and the preparation method comprises the following steps: (1) adding octadecane microcapsules into an aqueous solution containing sodium alginate, and stirring I to obtain a solution I; (2) adding graphene nanosheets into the solution I obtained in the step (1), stirring II to obtain a spinning solution, and standing; and (3) putting the standing spinning solution obtained in the step (2) into a wet spinning device for wet spinning, and drying to obtain the composite phase change fiber, wherein in the wet spinning device, an outlet at the tail end of a spinning head is arranged in a coagulating bath. The process condition requirement is low, and the prepared phase change fiber is linear, has the characteristics of no leakage, high heat storage density, no toxicity, good flexibility, excellent light absorption performance and the like, can adjust the enthalpy value, and has a great prospect in the field of human body heat management.

The invention discloses a heat storage plate of a continuous directional network structure composite phase change material and a preparation method and application. The heat storage plate comprises a base plate and a packaging plate. The base body plate is provided with hollow-out units which are arranged in an array mode, the hollow-out units and the protruding units are provided with continuously-oriented wall bodies, the interiors of the hollow-out units are filled with composite phase change materials, and the protruding units are used for enhancing the heat exchange effect with hot fluid; the packaging plate is used for packaging the substrate plate. According to the heat storage plate, on one hand, the continuous directional network structure composite phase change material provides a complete heat transfer path in the heat storage plate, the heat conduction performance of the heat storage plate is greatly improved, meanwhile, a micro heat conduction network is constructed through expanded graphite, and the heat conduction performance of the heat storage plate is doubly improved; and on the other hand, due to the fact that the size of the hollowed-out units of the base body plate in the heat storage plate is small, the size of the composite phase change material is large, and then the heat storage plate is endowed with large heat storage density.

The application discloses a free telescopic and detachable phase change heat storage and exchange device, which comprises a shell, one end of the shell is a fluid inlet, the other end is a fluid outlet, a phase change module is arranged in the shell, the phase change module comprises a shell layer phase change module and an internal phase change module of the shell, the shell layer phase change module is arranged close to the inner wall of the shell, and the internal phase change module of the shell is arranged in the cavity of the shell layer phase change module. The device has the advantages of the tube-shell type and the plate type phase change heat exchanger, the heat storage and release rate is obviously higher than that of the existing plate type and tube-shell type phase change heat storage and exchange devices, and the problems of thermal expansion and cold contraction of the PCM module are effectively solved. The device has the advantages of high heat storage density, fast heat storage and release rate, compact structure, less heat loss, no expansion and cracking problems, no melting "dead zone", easy disassembly, installation and cleaning and the like. Compared with the prior art, the device has outstanding substantial characteristics and significant progress.

This invention relates to the technical field of converting decommissioned coal-fired power plants into energy storage power stations, and particularly to an energy storage power station system and operation method based on the transformation of decommissioned coal-fired power plants. The system includes: a high-temperature heat pump, an electric heating component, and a latent heat packed bed; the high-temperature heat pump uses off-peak electricity or surplus renewable energy to compress air to a high-temperature, high-pressure state, and uses the air to perform primary heating treatment on supercritical carbon dioxide; the electric heating component performs secondary heating treatment on the supercritical carbon dioxide; in the heat storage stage, the supercritical carbon dioxide after primary and secondary heating treatment flows into the latent heat packed bed along a first direction, storing heat in a phase change material; in the heat release stage, the supercritical carbon dioxide flows out of the latent heat packed bed along a second direction, exchanging heat with the feedwater side of the steam generator in the decommissioned power plant, thereby realizing the conversion and transformation of the decommissioned coal-fired power plant into a Carnot battery energy storage power station. The technical solution of this invention can improve the heat storage density and electrothermal conversion efficiency.

The invention discloses a heat storage device coupled with metal hydride and a photo-thermal power generation system, and relates to the technical field of energy storage. The heat storage device coupled with the metal hydride comprises a high-temperature fused salt storage tank and a hydrogen storage tank, the high-temperature fused salt storage tank is provided with a high-temperature fused salt input port and a high-temperature fused salt output port, a metal hydride storage tank is arranged in the high-temperature fused salt storage tank, the metal hydride storage tank is filled with the metal hydride, and the metal hydride storage tank is communicated with the hydrogen storage tank. The high-temperature fused salt heats the metal hydride in the metal hydride storage tank, so that the metal hydride is heated to release hydrogen and the hydrogen is stored in the hydrogen storage tank. And after the temperature of the fused salt is reduced, hydrogen in the hydrogen storage tank is released to the metal hydride storage tank, so that the dehydrogenation-state material absorbs the hydrogen and releases heat to heat the fused salt in the high-temperature fused salt storage tank, and heat storage and heat release are achieved. By combining the high heat storage density of the metal hydride and the good fluidity of the fused salt, the heat transfer performance and the heat storage efficiency of the heat storage device are improved.

The invention relates to application of a struvite and / or struvite-based composite material in thermochemical energy storage, the struvite and / or struvite-based composite material is used as a thermochemical energy storage material, and the thermochemical energy storage material comprises amino group, potassium group, sodium group struvite and / or struvite-based composite material and the like. The preparation method comprises the following steps: synthesizing and preparing struvite minerals by adopting a chemical reagent; precipitating phosphorus, magnesium and other elements in the wastewater / seawater by adopting a precipitation method to recover struvite; hydrating magnesium phosphate cement to obtain a struvite hydration product; the struvite is compounded with other functional matrixes or fillers to prepare the composite thermochemical energy storage material. Compared with the common defects of easy deliquescence, corrosivity, low heat storage density and the like of the traditional hydrated metal salt thermochemical energy storage material, the thermochemical energy storage material has the advantages of higher heat storage density, moderate working temperature, no deliquescence, no corrosivity, simple and diversified manufacturing modes and the like, and can meet the energy storage management requirements in different fields.

This application discloses a method for encapsulating organic solid-liquid phase change materials. The method includes the following steps: mixing phase change microcapsule powder, polymer, crosslinking agent, and water; reacting; washing with water; and drying to obtain the organic solid-liquid composite phase change material. This invention has low process requirements, does not use organic solvents, has minimal environmental pollution, and the prepared phase change profile has an adjustable shape, exhibiting characteristics such as no leakage, high heat storage density, and good stability, making it highly promising for applications in cold chain transportation and thermal management.