6results about How to "Reduce subcooling" patented technology

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 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 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%.