12results about How to "High electrothermal conversion efficiency" patented technology

The invention belongs to the technical field of graphene, and particularly relates to graphene leather capable of realizing temperature-sensitive color development and a preparation method of the graphene leather. As the graphene heating functional layer adopts the high-thixotropic silver paste, the printed circuit pattern is clear in edge, uniform in thickness and extremely high in consistency with the designed pattern; and a clear interface is formed between a silver paste circuit and leather fibers, and improper penetration is avoided. And the circuit resistance value consistency is excellent (the deviation is controlled within + / -5%), so that rapid, uniform and stable planar heating can be realized after the graphene heating layer is connected, and the local overheating hidden danger is perfectly eliminated. According to the present invention, the natural texture and the soft touch feeling of the leather are maintained while the efficient and safe heating performance with the visual color developing function is achieved.

The present application relates to a kind of methods for catalytically converting methane to olefins, aromatics and hydrogen in joule heat coupled metal catalytic reactor.The methane feed gas heated by hot joule heat is passed into metal catalytic reactor for catalytic conversion reaction to prepare olefins, aromatics and hydrogen using joule heat as heat source.The conversion rate of methane is 35-85%;The selectivity of olefins is 65-90%;The selectivity of aromatics is 13-40%;Zero carbon deposition.The present application has the characteristics of electric heating conversion efficiency > 90%, long catalyst life, high methane conversion rate and product selectivity, zero carbon deposition, catalyst does not need to be enlarged, small industrialization difficulty, good process repeatability, safe and reliable operation, etc., and has broad industrial application prospect.

The portable graphene seedling raising shed has the advantages that the graphene composite support rod is adopted, the support rod is used as a heating device while supporting, the support rod itself is changed into an efficient and uniform heating body, stable and controllable heat supply is provided for the inside of the seedling raising shed, the spraying assembly arranged in the shed is convenient for watering and realizes intelligent control, the portable graphene seedling raising shed can be used for small-scale and family type seedling raising and cultivation in winter, has the characteristics of being light, capable of being quickly folded or stretched, and convenient for users to carry, transport and quickly deploy at different sites.

This invention belongs to the field of thermoplastic composite material joining technology, and specifically relates to a method for preparing a silane-modified thermoplastic composite resistance welding heating element. The invention first performs a cleaning pretreatment on a carbon nanotube film to remove surface contaminants. Then, plasma treatment technology is used to etch and activate the film surface, introducing oxygen-containing groups to provide active sites for silane grafting. Finally, silane is grafted onto the plasma-activated film using a silane coupling agent, utilizing its bifunctional properties to construct a molecular bridge between the carbon nanotubes and the resin, thereby improving the interfacial bonding force between the film heating element and the resin, and increasing the resistance welding strength. The heating element prepared by this invention has high specific strength, corrosion resistance, and better homogeneity with the base material, making it more suitable for complex welding joint service environments.

The application discloses a kind of fibrous felt that can be all-weather fast recovery high viscosity crude oil, preparation method and its application.The fibrous felt includes the fibrous substrate formed by profiled cross-section fiber, and the binder layer, functional layer and hydrophobic coating sequentially loaded on its surface;Functional layer is used to generate Joule heat when energized and generate photo-thermal effect under light;The water contact angle of fibrous felt is greater than 140°.The application also provides its preparation method and application.The application integrates photo-thermal and Joule heat effect in the same felt, realizes all-weather operation ability;Use C-shaped or Y-shaped profiled cross-section fiber, accelerate the penetration and absorption of high viscosity crude oil;Through the synergistic effect of polypyrrole layer and MXene layer, the resistance is significantly reduced and the oil absorption time is shortened.The fibrous felt of the application has simple preparation process, and is suitable for all-weather oil spill recovery in complex environment such as ocean oil spill.

The utility model provides a far infrared baking cage, which relates to the technical field of baking equipment, and comprises a base, a bamboo weaving cage, a bamboo weaving cover and a far infrared microcrystal heating device, the bamboo weaving cage is detachably mounted on the base, and the bamboo weaving cover covers the top of the bamboo weaving cage; the far infrared microcrystal heating device is installed on the base. The interior of the bamboo weaving cage can be evenly heated through the far infrared microcrystal heating device, the baking cage has the advantages of being rapid in heating, high in electricity-heat conversion efficiency and even in temperature, in addition, the bamboo weaving cage and the bamboo weaving cover are lighter in mass, heat preservation and heat insulation materials do not need to be additionally arranged, and the manufacturing cost of the baking cage is reduced.

The invention belongs to the technical field of graphene, and particularly relates to a graphene oxide and resistance wire compounded flexible heating pad. The resistance wire is used as a main heating body to provide a basic heat source, and meanwhile, an efficient three-dimensional heat conduction network is constructed through the graphene modified layer. The network not only can quickly and uniformly disperse heat generated by the resistance wire, but also can convert part of heat energy into far infrared radiation with the wavelength of 6-14 microns. By means of the composite heat transfer mode, the overall electric-heat conversion efficiency is greatly improved, reaches 95% or above and is far better than that of a traditional resistance wire heating pad (60-70%), and electric energy is effectively saved.

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.

This invention discloses a graphene fiber-reinforced flexible heating composite material, its preparation method, and its applications. The composite material comprises an integrated flexible heating base layer formed by combining a fiber cloth with in-situ grown graphene with a thermoplastic resin. The graphene grows in situ on the fiber surface, forming a continuous and uniform conductive heating network, which, together with the thermoplastic resin matrix, constitutes a non-layered, integral structure. The composite material provided by this invention has a thinner structure, more uniform heating, and high interfacial bonding strength. It also possesses excellent flexibility, high structural strength, weather resistance, and washability, solving the technical pain points of existing flexible heating materials such as uneven heating, poor adhesion, and low structural strength. It can be widely used in industrial equipment heating and de-icing, low-temperature flexible bonding insulation heating, household heating, medical hot compresses, outdoor weather-resistant heating, and electric heating tube insulation, among other fields.

The invention provides a preparation method of an aramid fiber-based ultrathin electrothermal film and the obtained electrothermal film. The preparation method comprises the following steps: S1, adding aramid fibers into a mixed solution of potassium hydroxide and dimethyl sulfoxide, adding isopropanol, unbundling to obtain aramid nanofibers, and carrying out reinforced dispersion to obtain an aramid nanofiber suspension; s2, adding pyrrole into the aramid nanofiber suspension, magnetically stirring, adding a ferric trichloride aqueous solution, and performing in-situ polymerization to obtain an aramid nanofiber coated polypyrrole suspension; and S3, adding the aramid nanofiber suspension into the aramid nanofiber coated polypyrrole suspension, forming a film, soaking the film in a polyvinylidene fluoride organic solvent solution, and polymerizing to obtain the electrothermal film. The contact resistance is low, the number of conductive paths is large, and the conductivity is good, durable and stable; the heating uniformity is good, the thermal response speed is high, and the electro-thermal conversion efficiency is high; the material consumption is small, the weight is light, the thickness is small, the cost is low, the flexibility is good, and the method is easy to process and widely applied to large-scale commercialization.

The utility model provides a baking machine, which relates to the technical field of baking equipment, and comprises a cabinet, a ventilation device, a material bearing piece, a rotary driving piece and a far infrared microcrystal heater, the material bearing piece is installed in the machine cabinet, a first airflow channel and a second airflow channel are arranged between the inner side wall of the machine cabinet and the material bearing piece, the material bearing piece is located between the first airflow channel and the second airflow channel, and the ventilation device is installed on the machine cabinet. The ventilation device drives airflow to circularly flow along the first airflow channel and the second airflow channel in sequence, the material bearing piece is in transmission connection with the rotary driving piece, the far infrared microcrystal heaters are installed in the first airflow channel and the second airflow channel correspondingly, the heating efficiency and the electric heating conversion efficiency can be improved, and baking temperature distribution is more uniform.

This invention relates to the field of graphene composite materials technology, and more particularly to a heated de-icing graphene glass fiber cloth and its preparation method. The heated de-icing graphene glass fiber cloth involves treating glass fibers with low-temperature plasma; depositing graphene on the surface of the plasma-treated glass fibers in a first mixed gas via chemical vapor deposition; then treating with water vapor at 700-800℃ to obtain graphene glass fibers; weaving the graphene glass fibers to obtain a fiber fabric; and depositing graphene on the surface of the fiber fabric in a second mixed gas via chemical vapor deposition to obtain the graphene glass fiber cloth. The fiber cloth obtained by this invention not only has a significantly reduced density and lighter weight per unit area, but also a high electrothermal heating rate and effectively improved electrothermal conversion efficiency, achieving a balance between flexibility, electrothermal stability, and mechanical strength in the graphene glass fiber cloth.