84results about How to "Improve heat production efficiency" patented technology

The invention provides a method and a device for starting a fuel cell subzero starting, and belongs to the technical field of fuel cells. The method comprises the following steps: intermittently or continuously providing a hydrogen-containing atmosphere for the fuel cell when the fuel cell is started below zero, and then applying current or voltage control to the fuel cell to heat the cell so as to quickly increase the temperature of the cell. The device comprises a fuel cell, a hydrogen supply device and a current generating device, an air outlet of the hydrogen supply device is simultaneously communicated with a hydrogen electrode and an air electrode of the fuel cell, or the air outlet of the hydrogen supply device is communicated with any one of the hydrogen electrode and the air electrode of the fuel cell, and the hydrogen electrode and the air electrode of the fuel cell are communicated through a pipeline. The invention aims to solve the problems that the fuel cell is large in energy consumption for subzero starting, water icing is generated, the performance of the cell is reduced, and the service life of the cell is prolonged, and is particularly suitable for subzero starting of fuel cell commercial vehicles.

The invention discloses a lithium ion secondary battery having a self-heating function. The lithium ion secondary battery comprises a battery cell, an outer package and electrolyte; the outer package is used for encapsulating the battery cell; the electrolyte is filled in the outer package; a cathode and an anode are leaded out on the battery cell; a metal foil positioned at one side of the battery cell is also arranged in the outer package; the metal foil is provided with a third pole; and the third pole and the anode can be connected or disconnected. After the above structure is adopted, short-circuiting between the cathode and the anode can be caused by connection between the third pole of the metal foil and the anode in a low-temperature condition; heating can be caused when relatively large current passes through the metal foil instantly, so that the internal temperature of the battery is improved better; relatively high capacity of the lithium ion battery in a low-temperature environment can be ensured; furthermore, due to the internally insulated metal foil, the heat production efficiency is far greater than that in an external heating manner; furthermore, the internal temperature rising uniformity of the battery is better; the cost of the battery is also reduced; the energy density of the battery is increased; and in addition, the lithium ion secondary battery also can be suitable for different environmental temperatures better.

The invention discloses a small-diameter shaft shoulder stirring head. The small-diameter shaft shoulder stirring head comprises a clamping part, a shaft shoulder part and a stirring needle which aresequentially connected, the diameter of the needle tip part of the stirring needle is defined as L1, the diameter of the needle root part of the stirring needle is defined as L2, the diameter of the shaft shoulder part is defined as L3, the ratio of L1 to L2 is equal to 1 to 1-1.7, the ratio of L2 to L3 is equal to 1 to 1.8-2.5, the end face of the shaft shoulder part comprises a stirring area close to the stirring needle in the radial direction and an envelope area away from the stirring needle, and the stirring area is provided with a non-concentric circle structure for improving the friction torque. The stirring head has the advantages that stirring and heat production effects can be increased, welding defects can be avoided, and the stirring head is suitable for producing narrow-edge welds.

The invention provides a graphene coating electrothermal needle for high-efficiency heat production. The graphene coating electrothermal needle comprises a tubular hollow needle body, a bevel connection needle tip integrated with the tubular hollow needle body, an insulated heat insulating coating and graphene coating of nano-silica gel which are attached to the outer surface of the hollow needlebody, an insulated conductor penetrating through the hollow needle body and the graphene coating to form a closed loop, a connection point between the insulated conductor and the graphene coating andan insulated needle handle used for pinch; the needle body is coated with the insulating coating and the graphene coating in sequence, and the heat production part is the graphene coating, the heat production efficiency is higher, and the graphene coating electrothermal needle is superior to existing most electrothermal materials; the positive and negative electrodes of a power supply are connected to the upper and lower ends of the graphene coating through the insulated conductor respectively, the current does not flow through the needle body, the heat production position is precise, and thetemperature is easy to control. The graphene coating electrothermal needle for the high-efficiency heat production has the advantages that the structure is simple, the use is convenient, the graphenecoating electrothermal needle is safe and reliable, the needle handle insulates heat, and the fine operation of a needle operator cannot be disturbed.

The invention discloses a flame gun control type discarded radio frequency cable recovery apparatus comprises a rack. An unrolling wheel is mounted on the side wall of the rack; a rolling wheel is arranged on the rack; a driving motor is arranged on the rack; the front part of the driving motor is provided with a driving shaft; a driving wheel covers the periphery of the driving shaft; the driving wheel is engaged with the rolling wheel; a suspended ceiling rack is arranged in the internal top of the rack; a suspended ceiling is arranged on the suspended ceiling rack; a temperature controller is mounted on the rack; the lower part of the suspended ceiling rack is provided with electric heating pipes; electric heating wires are electrically connected with the temperature controller; an installation rack is arranged on the internal top of the rack; a fire injection shell is mounted on the installation rack; the lower part of the fire injection shell is provided with a plurality of fire spraying nozzles; a fire injector is arranged on the rack; the fire injector is connected with the fire injection shell via a fire injection pipeline; and a control switch is arranged on the fire injection pipeline. The radio frequency cable can be pre-heated; radio frequency cable cores can be rolled via the rolling wheel; and the radio frequency cable can be fused.

The invention discloses a concrete pre-embedded pile for soft foundation reinforcement, and belongs to the technical field of pre-embedded pile reinforcement. According to the concrete pre-embedded pile for soft foundation reinforcement, the scheme is that a pre-embedded pile is pre-embedded into soft soil, and concrete with a temperature is filled into a guide hole, so that concrete is in contactwith a cylindrical gasbag after entering an internal cavity, ammonium hydrogen carbonate in the cylindrical gasbag is heated to decompose and expand and gas pressure at the lower side of the cylindrical gasbag is increased, and therefore, a pre-sealed film is cracked; under return action of an elastic telescopic pole, a deformed rubber bag is extruded towards the outer side, and a contact circular plate is in continuous mutual friction with a spherical gasbag, so that calcium hydrogen carbonate in the spherical gasbag is heated to decompose, the spherical gasbag continuously expands through mutual friction between calcium hydrogen carbonate and quartz sand powder, and a contact area between turned-over deformed rubber bag and soil is increased, and therefore, sink of the pre-embedded pilecan be effectively relieved.

The invention relates to a composite material with heat accumulation function, which comprises (by weight ratio) tourmaline ultramicro powder 25-50%, caloric powder 40-65%, adhesive 2-5%, embedding agent 1-5%. The process for preparation comprises raw material preparation, mixing, and press forming, wherein the pressure for press forming is 12-30 MPa.

The invention discloses a biomass fuel waste heat recycling cooking range which comprises a hearth defined by high temperature resistant materials and an air blower. A grate bridge is arranged at the bottom of the hearth, an opening for containing a heated body is formed in the top of the hearth, an ash accumulating cavity is formed below the grate bridge, a feeding opening is formed in the hearth and extends out of the wall of the hearth through a pipe or a hopper, and an air outlet of the air blower is communicated with the ash accumulating cavity through a pipe. The biomass fuel waste heat recycling cooking range further comprises a waste heat recycling cavity, hot air pipes and an induced draft fan. The heated body is connected with the top of the hearth in a sealed mode to form a heating area, the waste heat recycling cavity is arranged to surround the hearth and separated from the heating area at the top of the hearth, the hot air pipes are arranged in the waste heat recycling cavity, one ends of the hot air pipes extend out of the waste heat recycling cavity to be communicated with the heating area at the top of the hearth, and the other ends of the hot air pipes extend out of the waste heat recycling cavity to be communicated with the induced draft fan. The biomass fuel waste heat recycling cooking range is convenient to use, and heat generated by burning biomass particle fuel can be sufficiently used.

The invention relates to an alcohol group steam generator, in particular relates to a steam generation heating device for combusting alcohol group fuels, and discloses an alcohol group steam generator of which three layers of vertical combustion bins are fixed on a furnace head, and one sides of the vertical combustion bins are provided with pressure stabilizing chambers. Under the same alcohol group fuel materials and the same volume, the heat production efficiency can be improved; the production cost can be lowered; steam can be generated rapidly (for example, steam can be generated within 100 seconds at the volume of 50*40*80 ); heat start is rapid ( heat can start in 5 seconds); pressure in the combustion bins is stable, safe and reliable; discharged heat and waste gas are less; and water is added automatically, and the water level and liquid level of the vertical combustion bins are automatically controlled, and the dangerous phenomena of dryout and the like cannot happen.

The invention provides a magnetic energy-storage composite material, a preparation method and application thereof. The magnetic energy-storage composite material comprises the following components in percentage by weight: 40-88 percent of permanent magnet alloy powder, 5-40 percent of energy storage powder, 5-40 percent of six-ring rock powder and 1-5 percent of adhesive. By adopting the components and the proportion, the magnetic energy-storage composite material has magnetic therapy health effect and an energy-storage heating function at the same time, has high strength, enduring heat production efficiency, safety, reliability, no any toxic side effects and no pollution, can spontaneously generate heat and can be widely used for medical care or energy storage.

The invention discloses a method for screening and matching an insulating and heat-insulating material and a nano-crystalline metal material in a nano current channel layer. The method comprises the following steps: determining the insulating and heat-insulating material according to a material selection principle; establishing a crystal model according to the insulating material, heating the crystal model to melt the crystal model, cooling the crystal model to a preset first temperature, and operating the crystal model for a preset first time to obtain an amorphous model; calculating the formation energy, mean square displacement and radial distribution function of selected nano current channel material atoms in the model according to the amorphous model; and screening a material suitable for growing and gathering in the insulating and heat-insulating material according to the formation energy, the mean square displacement and the radial distribution function. The nano current channel layer prepared from the material screened by the method is an insulating layer containing metal nano crystal grains penetrating through the film thickness of the nano current channel layer, and the current only flows between the electrode layer and the phase change layer through a nano current channel formed by the metal nano crystal grains; and the power consumption of the phase-change memory can be obviously reduced.

The invention discloses a phase change memory based on a nano current channel. A used nano current channel layer structure is used for limiting the path of a current, so that the current enters a phase change layer from a high-conductivity nano crystal grain when flowing through the layer, and the current is limited in the nano current channel. According to the nanoscale conductive channel, the contact area between the phase change layer and the electrode layer is greatly reduced, the current density of a local contact part is greatly improved, and the heat production efficiency of current in the phase change layer is improved. And meanwhile, the insulating heat-insulating material with low conductivity and low heat conductivity prevents heat in the phase change layer from being dissipated to the electrode layer, so that the electric heat utilization efficiency of the phase change layer is improved. Compared with a phase change unit which is as small as possible and manufactured by adopting a more advanced manufacturing process, the phase change memory can break through the process limitation, further reduces the effective contact area of the electrode and the phase change material, and is simple in process, so the phase change memory easily realizes the reduction of operation power consumption.

The invention provides a honeycomb-type flow channel double-sided huffing PVT assembly which is composed of an aluminum huffing heat exchange plate, an EVA adhesive film, a black photovoltaic back plate, an EVA adhesive film, a photovoltaic cell assembly, an EVA adhesive film and a tempered glass plate from bottom to top, and the aluminum huffing heat exchange plate, the black photovoltaic back plate, the photovoltaic cell assembly and the tempered glass plate are laminated and bonded at high temperature through the EVA adhesive films. And an aluminum alloy frame is used for packaging and forming. The module can generate heat while generating electricity, and the temperature of the photovoltaic cell is reduced in the heat generation process, so that the electric efficiency of the photovoltaic cell is improved. The honeycomb-type flow channel double-sided heat exchange plate increases the turbulence level of an internal circulating working medium, improves the heat absorption capability of the aluminum double-sided blowing-up heat exchange plate, greatly reduces the temperature of the photovoltaic cell, and further improves the electrical efficiency of the photovoltaic cell. According to the assembly, solar energy is deeply developed and utilized, and the thermoelectric efficiency of solar energy utilization is improved.

The invention discloses a composition for preventing and controlling cold damage, food containing the composition and an application of the composition or the food, and belongs to the technical fieldof food production. The composition is prepared from [6]-gingerol, piperine and cinnamaldehyde; and the food containing the composition is used to prepare a beverage preparation, and the beverage preparation includes the following components: 2 parts by mass of the [6]-gingerol, 1.6 parts by mass of the piperine, 1.0 part by mass of the cinnamaldehyde, 0.4 part by mass of pectin, 0.3 part by massof sodium carboxymethyl cellulose, 0.05 parts by mass of citric acid, 0.04 part by mass of aspartame and 1000 parts by mass of purified water. The composition provided by the invention does not contain toxic ingredients, can better increase the body heat-generating effect, and can be used to prevent and treat the cold damage; and the components have a synergistic effect, so that the use amount ofa drug is reduced, and the problems that a current drug for preventing and treating cold damage contains multiple medicine flavors, a large dosage and toxic ingredients are solved.

The embodiment of the invention relates to a bone cement with a high heat generating efficiency. The bone cement is prepared from, by mass, 0.2-1.0% of magnetic nano-partilces MxFe3-xO4, wherein in the magnetic nano-partilces MxFe3-xO4, M is one or a mixture of several of cobalt, manganese and zinc, and the value range of X is 0.1-1. In the bone cement, the magnetic nano-partilces with the high heat generating efficiency are added, high heating efficiency can be achieved with a small adding amount when the product of the frequency (f) and the strength (H) of a magnetic field is smaller than 5*10<9> Am-1s-1, the effect of killing tumor cells can be achieved, and the heating efficiency is within the safe range capable of being borne by the human body.

The invention discloses an alcohol-based fuel automatic proportioning combustion system comprising a combustion device and an oil supply device; the combustion device is used for combusting alcohol-based fuel and providing heat; the oil supply device is used for providing the alcohol-based fuel for the combustion device, wherein the oil supply device comprises an oil supply pipe and a fuel conveying device; an outlet of the oil supply pipe is connected with the combustion device; the fuel conveying device comprises at least two storage tanks, at least two oil supply pumps and at least two first valves; one of the two storage tanks is used for storing methanol, and the other storage tanks are used for storing additives; the oil supply pumps are arranged in one-to-one correspondence with thestorage tanks, and an inlet of each oil supply pump communicates with the corresponding storage tank; and the first valves are arranged in one-to-one correspondence with the oil supply pumps, an inlet of each first valve is connected with an outlet of the corresponding oil supply pump, and an outlet of each first valve is connected with an inlet of the oil supply pipe. The alcohol-based fuel adopting the combustion system disclosed by the invention can be used immediately after being prepared, so that the phenomena of layering, non-uniform mixing and the like are avoided, and the alcohol-based fuel can be normally and sufficiently combusted.

The invention discloses a stirring head with depth variation for a stirring area of friction stir welding. The stirring head comprises a clamping part, a shaft shoulder part and a stirring pin in sequential connection, wherein the end face of the shaft shoulder part comprises an enveloping area far away from the stirring pin in the radial direction and further comprises the stirring area; and thestirring area is used for enlarging the friction moment, has depth variation at least in the circumferential direction and is close to the stirring pin in the radial direction. The stirring head has the advantages of improving the stirring and heat generating effect, avoiding a welding defect and enlarging the stirring force.

The invention discloses a dielectric medium for a wave energy molecular oscillation heat collector. The dielectric medium comprises a dielectric medium shell; a powder dielectric medium which is filled in the dielectric medium shell and wraps a fin type metal tube, wherein the powder dielectric medium comprises a first material and a second material, the first material is powder silicon powder, the second material is powder carbon powder, and the mass ratio of the first material to the second material is (1-4): 1.