235results about How to "High specific heat capacity" patented technology

The invention belongs to the field of a phase change material technology for cool storage, and discloses an inorganic/organic composite casing layer nanometer phase-change capsule cool-storage fluid and a preparation method thereof. The preparation method comprises the following steps: hydrolysis and condensation are carried out for metal alkoxide, modification is carried out with an organosilicon coupling agent, modified metal oxide sol is obtained; a styrene monomer, an acrylic ester comonomer, a chain transferring agent, an initiator and an alkane core material are mixed for forming an oil phase, the oil phase is added into an emulsifier and deionized water for forming a water phase, homogeneous emulsification is carried out, and miniemulsion is obtained; the miniemulsion is heated to 40-80 DEG C, in situ polymerization is carried out for 10-50 minutes, the modified metal oxide sol is added drop by drop, and after a reaction, a composite casing layer nanometer phase change capsule emulsion is obtained; the emulsion is added into an antifreeze, water is added for dilution, and the product is obtained. Metal oxide and organic polymers are compounded into a casing layer; the product has the advantages of high heat conduction performance, high specific heat capacity and good mechanical stability at the same time, and the product can be used as phase-change cool-storage fluid for cool storage air-conditionings.

The invention discloses a water-assisted molding process and constant pressure water-assisted injection molding equipment and aims to realize stable water injection and pressure maintenance and improve the quality of plastic parts. The equipment comprises an injection molding machine controller, a hydraulic control telescopic gas needle and a water needle, wherein the water needle is connected with a gas injection pressure closed-loop control circuit, a water injection pressure closed-loop control circuit and a depressurization closed-loop control circuit respectively; and the hydraulic control telescopic gas needle is connected with a compressed air drainage unit. The water-assisted molding process comprises the following steps of: a, injecting a plastic melt into a die cavity; b, injecting a little nitrogen into the plastic melt; c, injecting high-pressure water into the rear part of the nitrogen; d, injecting the high-pressure water into the die cavity and maintaining the pressure;e, after cooling, curing and molding, draining the injected water and reducing the pressure; f, draining the injected water completely; g, ejecting a plastic part; and h, entering the next period. Compared with the prior art, the equipment is provided with a gas pressure supercharger and a water pressure generating device to fulfill the aims of realizing stable water injection and pressure maintenance and reducing the product development and production cost.

The invention provides a method for preparing a bean dregs-based nitrogen-boron co-doped porous carbon material. The method is a one-step impregnation carbonization activation method, and comprises the following steps: (1) pretreating bean dregs: boiling, fermenting, then adding a catalyst into the fermented bean dregs for catalysis, washing and then freeze-drying; (2) adding deionized water intothe pretreated bean dregs, adding an activator and a boron source, stirring and mixing, transferring into a culture dish, and putting into a drying oven for drying; (3) heat-treating the bean dregs treated in the step (2), soaking in an HCl solution after cooling, washing, and finally drying by microwave to obtain treated bean dregs; and (4) adding a binder and a pore forming agent into the treated bean dregs in the step (3), and mixing to form a bean dregs-based porous carbon material. According to the invention, the one-step impregnation carbonization activation method is adopted; and compared with the prior art, the one-step impregnation carbonization activation method has the advantages of simple method, low energy consumption and the like.

A method is made available for conducting an integrity test of filter elements (3), in particular of sterile filters. The integrity test involves direct measurement, at constant pressure, of a liquid flow on the inflow side of the filter element (3) to be tested. The test method is practically independent of changing environmental conditions, provides a result which is not distorted by a change of pressure on the inflow side of the filter element, and permits a very short measurement time.

The invention discloses a trough type solar middle-high temperature integrated concentrating solar power (CSP) device, and belongs to the technical field of concentrated solar power. The trough type solar middle-high temperature integrated CSP device is composed of parabolic trough condensation arrays, a heat exchanger, a heat accumulation evaporating tank, heat accumulation working medium, an evaporator, steam power machines, a condenser, a complementary boiler and the like. The trough type solar middle-high temperature integrated CSP device adopts a direct steam generation (DSG) heat transfer mode, achieves integral operation of heat transfer, heat accumulation, evaporation, heat supplement through the heat accumulation evaporating tank of the complementary boiler and fused salt and other heat accumulation medium, greatly simplifies integral construction, is favorable for lowering trough trough type concentrating solar power equipment cost, and is favorable for improving temperature of working conditions and power generating efficiency.

The invention discloses a composite heat storage material and a preparation method thereof. The composite heat storage material is prepared by adopting hematite ore as main material, bauxite tailing as forming material and clay as auxiliary material and adding water to mix. The proportioning of the materials is that the contents of hematite ore, bauxite tailing and clay are separately 70-87%, 7-15% and 6-15%. The preparation method comprises the following steps: firstly mixing the materials: mixing tailing and clay evenly, adding water for soaking, then adding hematite ore to mix, placing themixture in a ventilated place while controlling the moisture content; then shaping: placing the mixed materials in moulds to form and prepare test blocks; then drying: placing the test blocks in a oven to dry; finally roasting and cooling to obtain the heat storage material. The specific heat of the heat storage material is 0.150-0.166cal-g<-1>-K<-1> and the thermal conductivity is 1.18-1.30W-m<-1>-K<-1>. The preparation method of the heat storage material is characterized by easy process, low cost, higher value of mineral tailing and the like and the prepared composite heat storage material has high specific heat and good heat conductivity.

The invention discloses an aqueous dissociating abrasive cutting fluid used for cutting a solar silicon wafer and its preparation method. The aqueous dissociating abrasive cutting fluid comprises a synthetic polymer thickening agent, a non-ionic surface active agent, a dispersing agent, a defoaming agent and water. The aqueous dissociating abrasive cutting fluid has a moisture content reaching to more than 90 parts, the cutting fluid production cost is greatly reduced, but the performance is greatly improved, the cutting fluid has better dispersion suspension performance on SiC, the cutting fluid has better cooling and lubrication properties; aiming at the problem that a water base cutting fluid is easy to produce hydrogen in an on-line cutting process, the aqueous dissociating abrasive cutting fluid has targeted measures, greatly reduces the hydrogen production amount, makes the production more secure; and at the same time, and because of the low water content and high organic matter content, the aqueous dissociating abrasive cutting fluid is very low in COD (chemical oxygen demand) value, and is a green, environmental-friendly and new water base cutting fluid.

A nanofluid composed of a base fluid and a solid nanocomposite particle, where the solid nanocomposite particle consists of a carbon nanotube and a metal oxide nanoparticle selected from the group consisting of Fe₂O₃, Al₂O₃, and CuO. The metal oxide nanoparticle is affixed inside of or to the outer surface of the carbon nanotube, and the solid nanocomposite particle is homogeneously dispersed in the base fluid. The heat transfer and specific heat capacity properties of the nanofluid are measured using differential scanning calorimetry and heat exchanger experiments with different nanocomposite concentrations and different metal oxide percent loadings.

The invention belongs to the field of asphalt concrete pavements and relates to a composite asphalt cooling pavement top layer and a construction method thereof. The construction method comprises following steps: S1, a thermal-resistant asphalt mixture is spread on the top layer of a pavement and then rolled; S2, after the thermal-resistant asphalt mixture rolled in S1 is cured, the upper surface of the thermal-resistant asphalt mixture is coated with a coating; S3, after the thermal-resistant asphalt mixture and the coating are cured, the composite asphalt cooling pavement top layer is formed. Pavement ruts, the urban heat island effect and permafrost subgrade defects can be overcome.

The invention discloses an absorbing layer structure for a non-refrigeration long-wave infrared detector. The absorbing layer is arranged on a heat reactive film of the detector and sequentially composed of a first medium layer, a second metal layer and a third insulating layer from top to bottom. The absorbing layer is characterized in that the first medium layer is a silicon nitride film which is good in thermal-conductivity and high in corrosion resistance, the silicon nitride film is used as an anti-reflecting layer and a component protecting layer, the thickness of the film is 1000-1200nm, the second metal layer is a nickel chrome layer with the thickness being 8-12nm, the second metal layer is used as an absorbing layer of an infrared band, the third insulating layer is a silicon dioxide film with the thickness being 50-100nm, and the silicon dioxide film is used as the insulating layer between the heat reactive film and the metal layer. The absorbing layer is simple in preparation process, compatible with the existing microelectronic process and suitable for unit, alignment and area array infrared detectors. The infrared absorbing layer has the advantages of being firm in adherence, high in resistance to corrosion, good in repeatability, low in specific heat capacity and excellent in heat transfer performance, and has the absorption rate of larger than 85% on the infrared band of 8-14 micrometers.

The invention relates to a direct-expansion type solar heat and electricity co-generation system provided with two stages of heat storage water tanks. The direct-expansion type solar heat and electricity co-generation system comprises a collector array, a high temperature stage heat storage water tank, a low temperature stage heat storage water tank, a screw expander unit, a first heat exchanger and a second heat exchanger; heat energy of the high temperature stage heat storage water tank is suitable for conversion of heat into power; the heat energy of the low temperature stage heat storage water tank can be further converted to electric energy through an organic Rankine cycle, and can also be directly supplied to a user; and the collector array transfers the heat energy to the high temperature stage heat storage water tank or the low temperature stage heat storage water tank according to the solar irradiation intensity or is used for generating steam. During power generation, a water working medium directly absorbs heat and expands in the collector array without overheating measure, the conversion of heat into power can still be carried out efficiently on a 200-300 DEG C middle temperature condition, and the power generation efficiency is 10-25%. According to the direct-expansion type solar co-generation system, the power generation stability of the system and an annual utilization ratio of equipment are improved and raised, the independence and flexibility of power generation and heat supply of the system are improved, the system control is simple, and a solar resource is utilized fully and efficiently.

The invention relates to a double-zero aluminum foil for an alloying high-performance aseptic packaging material. The double-zero aluminum foil is characterized by comprising chemical compositions including, by mass, 0.48%-0.55% of Si, 0.58%-0.66% of Fe, 0.005%-0.01% of Cu, 0.0015%-0.005% of Mn, 0.0015%-0.005% of Ni, less than 0.001% of Zn, 0.02%-0.05% of Ti, less than 0.0003% of Zr and the balance aluminum. The double-zero aluminum foil for the alloying high-performance aseptic packaging material and the production process of the double-zero aluminum foil are high in production efficiency, high in finished product rate, low in cost, good in plate shape and stable in quality.

The invention discloses a preparation method of macromolecule water-absorbent resin fire extinguishing agent. The preparation method comprises the following steps: preparing NaOH aqueous solution; carrying out neutralization reaction with the prepared NaOH aqueous solution and acrylic acid; and carrying out graft copolymerization reaction, and solidifying, drying and crushing to prepare a product of which the water absorbent rate is more than 500g/g. According to the preparation method of macromolecule water-absorbent resin fire extinguishing agent disclosed by the invention, the product is polymerized in one step; baking and drying are not required; the process procedure is shortened; the production period is short; the cost is low; the three wastes cannot be generated during production process; and the product is pollution-free to the environment, safe and environment-friendly. The fire extinguishing agent product prepared according to the method is high in specific heat capacity, large in evaporation heat amount, nonflammable and strong in water storage capacity, so that the product has the advantages of fast fire extinguishing speed, low price, convenient operation and the like.

The invention relates to a semi-closed self-inert-type vibrating fluidized drying system, which comprises an inert gas generation device, a vibrating fluidized drying device, a tail gas dust removal purification device and a tail gas condensation purification device which are connected through pipes, wherein the gas outlet of the tail gas condensation purification device is communicated with the inert gas generation device through a pipe. The safety performance of the drying system provided by the invention is good and the problem of burning or explosion is avoided during drying. Besides, the drying system provided by the invention can solve the problems of high energy consumption, poor drying effect, poor dust removing effect and environmental pollution of the existing drying system.

The invention discloses a composite material tool electrode for electrolytic deposition and electric spark and a preparation method of the composite material tool electrode, and belongs to the technical field of electrical discharge machining of electric spark. The composite material tool electrode for electrolytic deposition and electric spark is characterized by comprising, by weight, 16-18% of SiC particles, 14-16% of TiB2 particles, and the balance copper as a base body, and the SiC particles and the TiB2 particles are embedded in the base body. Due to the fact that the SiC particles and the TiB2 particles are added to the copper base body, compared with the method that only the SiC particles are added in the initial research stage, on the premise of not changing the total adding amount, the specific heat capacity of the tool electrode is improved by 10%, the coefficient of thermal expansion is lowered by 3%, the hardness is improved by 5%, and therefore the loss of the electrode under same electrical discharge machining parameters is lowered by 7%, and the roughness of a machined surface is lowered by 2%.

The invention provides a polyether-ether-ketone composite material and a preparation method thereof. The polyether-ether-ketone composite material comprises the components in parts by weight: 90 to 98parts of polyether-ether-ketone, 2 to 10 parts of carbon fibers, 0.5 to 1 part of a silane coupling agent, 0.5 to 1 part of paraffin oil and 0.2 to 0.5 part of an antioxidant. Compared with unmodified polyether-ether-ketone, the polyether-ether-ketone composite material has the mechanical property remarkably improved. Meanwhile, the composite material disclosed by the invention is better in heatresistance and more suitable for being used in a high-temperature environment.

The invention is a class of medical bandages that are effective for use in the treatment of various types of tissue burns, such as burns due to heat, chemicals, or sun exposure. The inventive bandages are comprised of a thin and flexible heat sink such as a hydrogel infused with a thermally conductive material such as aluminum oxide particles. The inventive bandages rapidly cool a burn wound by ensuring direct contact of the infused hydrogel with the burn to draw heat away from the burn via conduction.

A method for preparing a composition with low corrosive effect and low freezing point, by mixing an ammonium cation source with a carboxyl anion source in an appropriate molar or weight ratio, either without a medium or by using an appropriate medium for obtaining liquid or water-soluble organic ammonium carboxylate of formula (1):

[NR¹R²R³R⁴]⁺_n[R⁵(COO)_n]⁻ⁿ,  (1),

in which R⁴, R², and R³ are selected from the group including hydrogen, substituted and unsubstituted alkyls containing 1-6 carbon atoms, R⁴ is a substituted or unsubstituted alkyl containing 1-6 carbon atoms, R⁵ is hydrogen, a substituted or unsubstituted hydrocarbon containing 1-6 carbon atoms and n is an integral 1-6 and

thereafter adding possible solvent and at the same time keeping alkali or alkali-earth metal content of the composition in a range of 0.001-30 wt-%, preferably in a range of 0.001-30 wt-% and most preferably in a range of 0.001-1.0 wt-% and halide content in a range of 0.001-1 wt-% most preferably in a range of 0.001-0.1 wt-%.

The invention discloses a method of cold water fracturing, and belongs to the technical field of oil-gas well engineering. The method of cold water fracturing comprises the steps that S1, fracturing liquid is prepared, specifically, the fracturing liquid which has no precipitation of solid materials in the state of 1-5 DEG C and with a stable colloid structure is selected; S2, the temperature of the fracturing liquid is lowered, specifically, ice blocks are added into the fracturing liquid in the S1 so that temperature cooling treatment can be conducted; S3, formal fracturing is conducted; andS4, well covering is conducted, specifically, the fracturing liquid is poured into a stratum, after the fracturing liquid temperature does not change, fracture liquid is recycled. According to the method of the cold water fracturing, improvement is conducted in terms of water power fracture, the influence of temperature on racks are brought into traditional water power fracture, the fracture is conducted through the cold water, the rocks are in the action of solid flow mechanics and are further subjected to congelation damage, crack tip stress and the rock inner stress supplement each other to reach the effect of optimization of rock breaking.

The invention discloses a cooling medium for a phase change radiator. The cooling medium comprises the following components by mass percent: 7-35% of n-octadecane, 2.5-17.5% of a surfactant, 0.5-10% of dihydric alcohol, 0.5-10% of fatty alcohol, 0.3-2.5% of inorganic salt and the balance of water, wherein water is selected from one of distilled water or deionized water. The cooling medium is large in specific heat capacity, stable in work state, small in fluid viscosity, not easy to solidify and good in heat transfer effect.