16results about How to "Reduce subcooling" patented technology

The invention belongs to the field of electronic chemical purification, and particularly relates to a method for strengthening a phosphoric acid melt crystallization process through ultrasound and residual liquid circulation, which comprises the following steps: adding a high-concentration phosphoric acid raw material into a static melt crystallizer, cooling and graining, and enhancing the purity by adopting ultrasound in a sweating stage, high-concentration uncrystallized raffinate is cooled by an external circulation coil heat exchanger and then flows back to a crystallizer, crystallization continues to be carried out, the yield is increased, and the Fe content can be reduced to 20 ppb from 73 through crystallization purification. The concentration of phosphoric acid adopted by the method is greater than or equal to 85%, the problems of poor impurity removal effect, low yield and long consumed time of a conventional static crystallization method are solved, the uncrystallized residual liquid is fully recycled, the energy consumption is reduced, and the method has high applicability.

The invention provides a shaped phase change material and a preparation method thereof. The phase change material is prepared from the following raw materials in percentage by mass: 45.8 to 56.7 percent of sodium phosphate dibasic dodecahydrate, 7.9 to 22.9 percent of sodium carbonate decahydrate, 7.6 to 15.9 percent of sodium sulfate decahydrate, 2.46 to 4.05 percent of a reinforcing material and 15 to 20 percent of an adsorbing material. The preparation method of the phase change material comprises the following steps: 1, preparing materials; 2, preparing an inorganic salt mixture; 3, preparing a molten inorganic salt mixture; 4, preparing a mixed material and sealing; and 5, preparing the shaped phase change material. The shaped phase-change material prepared by the invention has the advantages of proper phase-change temperature, higher phase-change latent heat, no liquid leakage, no toxicity, no inflammability, small supercooling degree and no phase separation; meanwhile, for application occasions where transportation and storage need to be carried out at the temperature of 20-30 DEG C, the shaped phase change material can serve as an effective normal-temperature cold storage agent and is used for resisting a low-temperature environment so as to protect specific chemicals and pharmaceuticals from being influenced by temperature fluctuation.

This invention discloses an encapsulation and molding technology for inorganic solid-liquid phase change materials. It enhances the photothermal conversion capability of inorganic hydrated salts through a two-stage encapsulation and molding process using a porous support material at the micro-pore stage, followed by shaping and a two-stage macro-encapsulation and molding process using commercial sealant and carbon materials. This two-stage encapsulation method plays a crucial role in maintaining the shape stability of the inorganic hydrated salt phase change material, resulting in a composite phase change material with a certain photothermal conversion capability. This multi-stage encapsulation and molding method is very simple, using low-cost porous matrix and commercial adhesives. It is highly effective in solving the problems of liquid leakage and thermal instability in inorganic hydrated salt phase change materials and can be extended to the multi-stage encapsulation and molding of other inorganic hydrated salt phase change materials. This simple, inexpensive, and efficient method will facilitate the application of inorganic hydrated salt phase change materials in practical applications.

The invention discloses an alum-based phase change energy storage composite material and a preparation method thereof, and relates to the technical field of phase change materials. According to the alum-based phase change energy storage composite material provided by the invention, the alum material, the nucleating agent and the silicon carbide nanowires are loaded on the porous carrier, the supercooling degree of alum can be reduced by utilizing the nucleating agent, and the heat-conducting property can be improved by utilizing the silicon carbide nanowires. Through the synergistic effect of all the components, the material has the low supercooling degree and the good crystallization characteristic, and the practicability of the material is greatly improved.

The invention discloses a phase-change material household cold and warm temperature control system based on virtual power plant power transaction, and the system comprises a heat pump air conditioning module which is communicated with a phase-change material energy storage module through a heat exchange fluid conveying module; the heat exchange fluid conveying module is provided with a heat exchanger and a heat exchange circulating pipeline, the heat exchange circulating pipeline sequentially passes through the heat exchanger and the phase change material energy storage module, the intelligent control module comprises a communication interface and a microprocessor, and the communication interface is connected into the microprocessor. The microprocessor is used for receiving time-of-use electricity price information of at least 24 hours in the future sent by the virtual power plant platform through the communication interface; through interaction between the intelligent control module and the virtual power plant platform, the electricity price and excitation signals can be real-time, the energy storage / release time sequence can be optimized, the response speed of electricity price adjustment is improved, and the use energy consumption of the heat pump air conditioner module is effectively reduced; and through a closed-loop feedback mechanism, aggregation scheduling of the virtual power plant can be promoted, and the flexibility of the power grid is improved.

This invention discloses a high-elongation cast Al-Cu-Zn-Mg alloy with good resistance to hot cracking. The alloy composition, by mass percentage, includes: Cu 3.5–4.5%, Mg 0.4–1.5%, Mn 0.2–0.5%, Ti 0.10–0.2%, Zn 2.5–3.5%, with the balance being Al and unavoidable impurity elements. Addressing the limitations of existing Al-Cu casting alloys, such as wide solidification temperature range, poor fluidity, and hot cracking, this invention provides a high-Zn-content Al-Cu-Zn-Mg alloy with good resistance to hot cracking. This alloy has a low melting point, a narrowed solidification temperature range, and excellent resistance to hot cracking and mechanical properties. It can be used for various high-strength cast aluminum alloy structural parts, effectively avoiding casting defects such as hot cracking, shrinkage cavities, and porosity, and significantly improving the overall mechanical properties of the alloy.

The present invention discloses a refrigerator using an enhanced high-voltage electrostatic field, comprising a refrigerator body, a refrigeration module, a storage module, a high-voltage direct current power module and an enhanced high-voltage electrostatic field module, wherein the high-voltage direct current power module comprises an electrode plate, the refrigeration module is mounted on the upper part of the refrigerator body, the high-voltage direct current power module is mounted on the lower part of the refrigerator body, the storage module is mounted on the refrigeration module, the electrode plates are mounted on the top and bottom of the storage module respectively, and two electrode plates are connected to the positive terminal and the negative terminal of the high-voltage direct current power module respectively. The present invention can enhance the internal field strength of the material in the electric field by 10-20 times, and realizes the function of obtaining a larger electric field strength by using a smaller voltage. The invention can improve the freezing efficiency of the refrigerator, reduce the ice crystal size of the frozen items, and improve the freezing quality of the frozen food; it can also improve the refrigeration efficiency and fresh-keeping effect of refrigerated food, and extend the shelf life of refrigerated food.

The invention discloses a constant-temperature composite phase change cold storage agent and application thereof. The constant-temperature composite phase change cold storage agent is prepared from the following components: water, NH4Cl, NaNO3, TiO2 and curdlan. The content of each component is as follows in percentage by mass: 15% of NH4Cl, 35%-9% of NaNO, 0.05%-0.15% of TiO2, 0.5%-1.5% of curdlan and the balance of water. The phase change latent heat of the constant-temperature composite phase change cold storage agent is 247.20 J / g, the phase change temperature is-25.08 DEG C, the supercooling degree is 0.4 DEG C, and no phase separation phenomenon is found after repeated freezing and thawing. The constant-temperature composite phase change cold storage agent is low in phase change temperature, high in phase change latent heat, small in supercooling degree and free of phase separation, and the constant-temperature process is achieved in the mode that the cold storage agent is combined with a fresh-keeping box.

The invention discloses a novel phase change energy lattice and a preparation method thereof, and belongs to the technical field of phase change energy storage materials. The energy lattice product is composed of a shape-stabilized phase change system with thermal energy storage performance and an encapsulation bag. The preparation method comprises the following steps: realizing shaping adsorption of the phase change base material and the auxiliary agent by utilizing the supporting framework material, and meanwhile, carrying out secondary packaging by virtue of an aluminum foil bag, so that the problem of liquid leakage in a long-term recycling process is solved. The synthetic process is simple, application is convenient, and the material has no obvious liquid leakage phenomenon in the working period, and is high in phase change enthalpy value and low in price, so that the material has wide application prospects.

The invention discloses a phase-change emulsion for phase-change temperature-adjusting cellulose fibers and a preparation method of the phase-change temperature-adjusting cellulose fibers. The phase-change emulsion comprises the following components: 20-30 wt% of a phase-change material, 1-3 wt% of a nucleating agent with an antibacterial function, 1-3 wt% of protein colloid particles, 0.3-0.5 wt% of a surfactant and the balance of deionized water. Adding the phase change emulsion into a prepared cellulose solution by adopting a pre-spinning injection method to obtain a phase change spinning solution; the phase-change spinning solution is coagulated and formed through a spinning bath, then enters an air bath to be drafted, and then is cut off, desulfurized, pickled, washed, bleached, oiled and dried to prepare the phase-change temperature-adjusting cellulose fiber. The phase-change emulsion is low in supercooling degree, good in compatibility with a cellulose solution and used for preparing phase-change temperature-adjusting cellulose fibers, the spinnability is good during spinning, the production process is stable, and the fiber strength after spinning forming is high.

The invention provides a heat management system and an energy storage container. The heat management system is used for conducting heat exchange on a battery in an energy storage system and comprises a refrigerant circulation loop, the refrigerant circulation loop is provided with a compressor, a first heat exchanger, a second heat exchanger and a third heat exchanger which are connected with one another, and the third heat exchanger is provided with a first heat exchange part and a second heat exchange part; an outlet of the compressor is sequentially connected with the pressure regulating valve, the first heat exchange part and a first port of the second heat exchanger through pipelines, and a second port of the second heat exchanger is sequentially connected with the first heat exchanger, the second heat exchange part and an inlet of the compressor through pipelines. And in the heating mode, a refrigerant flowing out of the compressor flows into the second heat exchanger after being subjected to pressure adjustment and cooling adjustment. The heat exchange efficiency of the battery is improved through heat exchange between the refrigerant and the battery, and meanwhile, the superheat degree of the refrigerant is eliminated and the supercooling degree is reduced before heat exchange, so that the heat exchange uniformity is improved, and the temperature uniformity of the battery is improved.

The application belongs to the technical field of titanium alloy materials, and relates to a heat treatment method for realizing high strength, high toughness and high fatigue of Ti55531 titanium alloy, which comprises the following steps: firstly, Ti55531 titanium alloy bars are kept at a first two-phase zone temperature for heat preservation until the core temperature and the surface layer temperature are consistent, and then the temperature is raised to a specific temperature range in a single-phase zone for heat preservation to obtain beta single-phase structure titanium alloy bars; secondly, the beta single-phase structure titanium alloy bars are subjected to first cooling, the temperature is lowered to a second two-phase zone temperature, and after heat preservation, second cooling is performed, and then aging heat treatment is performed, so that finally Ti55531 titanium alloy finished bars are obtained. The Ti55531 titanium alloy finished bars have the comprehensive performance of high strength, high toughness and high fatigue, and the heat treatment method fully expands the application potential of Ti55531 titanium alloy in the structural part field.

The invention discloses an inorganic salt phase change cold storage material and a preparation method thereof, and relates to the technical field of phase change energy storage materials. The additive is prepared from the following raw materials in parts by weight: 32-48 parts of various inorganic salts; 2.8 to 3.4 parts of a modified nucleating agent; 78 to 86 parts of a thickening agent; 64 to 96 parts of ultrapure water; and 280-350 parts of a microcapsule modified doped stable shell material. The preparation method comprises the following steps: heating various inorganic salts until the inorganic salts are molten, sequentially mixing ultrapure water, a thickening agent and a nucleating agent into the molten inorganic salts, and fully homogenizing to obtain a phase-change main core material; and dispersing the phase change main core material in the microcapsule modified doped stable shell material, slowly adding an initiator, heating, taking precipitate, filtering, washing, drying and distilling to obtain the inorganic salt phase change cold storage material.

The invention provides a fresh-keeping storage container and a refrigerator with the fresh-keeping storage container, a fresh-keeping storage space is defined in the fresh-keeping storage container, and the fresh-keeping storage container comprises a drawer. The drawer is arranged in the fresh-keeping storage container in a drawable manner; a shelf is arranged in the drawer and is separated from the bottom surface of the drawer; wherein the shelf comprises a supporting plate and a shelf magnetic source piece, and the supporting plate is provided with a plane for placing stored objects; the shelf magnetic source piece is arranged on the bottom face of the supporting plate and used for forming a magnetic field around the shelf. According to the fresh-keeping storage container, the drawer is arranged in the defined fresh-keeping storage space, the shelf is arranged in the drawer, and the shelf and the bottom face of the drawer are spaced so that the interior of the drawer can be separated up and down. According to the fresh-keeping storage container, the supporting plate and the shelf magnetic source part are specially arranged in the shelf, the supporting plate is used for supporting articles on the upper side, and the shelf magnetic source part can form a magnetic field around the shelf, so that the fresh-keeping storage container has a magnetic field fresh-keeping function.

The application relates to a low-temperature concentration method for reducing crystallization entrainment. The low-temperature concentration method for reducing crystallization entrainment described in the application introduces small-molecule gas to form hydrate crystal nuclei or small crystals to serve as the crystal seeds of the freeze concentration before the stage of the freeze concentration crystallization phase change, can reduce the freeze concentration crystallization supercooling degree, and promotes the freeze concentration to occur. In the stage of the freeze concentration phase change, the gas is continuously introduced to enhance the heat transfer, increase the nucleation points, promote the crystallization to occur, form more small ice crystals, effectively reduce the generation of large ice crystals, and reduce the entrainment rate. Compared with single freeze concentration, the low-temperature concentration method for reducing crystallization entrainment adopting the embodiment of the application saves time by more than 10%, reduces the ice crystal entrainment rate by more than 10%, and improves the quality by more than 15%.

The invention relates to the technical field of power plant energy conservation, in particular to an indirect air cooling unit back pressure reducing system and a power generation system. Circulating water is arranged in the first cooling module and the second cooling module and exchanges heat with high-temperature steam of the heat removal module through the condenser, and the high-temperature circulating water after heat exchange flows into the first cooling module and the second cooling module to be cooled and then is put into the condenser again to exchange heat. And the second cooling module exchanges heat with part of the circulating water through the refrigerant, exchanges heat with the condensed water of the heat removal module again after heat exchange, and exchanges heat with the circulating water again. The heat exchanger has the beneficial effects that circulating water enters the evaporator through the shunting part to exchange heat with a refrigerant, so that the outlet water temperature of the circulating water is reduced. Meanwhile, refrigerant in the condenser is used for releasing heat to heat condensed water at an outlet of the condenser, the supercooling degree of the condensed water is reduced, and the economical efficiency of the whole thermodynamic system is improved.