578results about How to "Large temperature difference" patented technology

A thermoelectric module 11 includes support substrates 1a and 1b, the same numbers of N-type thermoelectric elements 2a and P-type thermoelectric elements 2b disposed on the support substrates 1a and 1b, wiring conductors 3a and 3b that electrically connect between the thermoelectric elements in series and an external connection terminal 4 electrically connected to the wiring conductor 3a. The N-type thermoelectric elements 2a and the P-type thermoelectric elements 2b have different values of resistivity.

An electronic apparatus comprises a housing containing a heat-generating component, and a cooling unit. The cooling unit includes a heat sink thermally connected to the heat-generating component, a first air passage for guiding air outside the housing to the heat sink and guiding air heated by heat exchange with the heat sink to the outside of the housing, and a second air passage for guiding air within the housing to the outside of the housing.

The invention relates to a method of producing a complex microelectronic structure, in which two basic microelectronic structures (1, 3) are assembled at the two respective connecting faces (3) thereof. The invention is characterised in that, before assembly, a difference is created in the tangential stress state between the two faces to be assembled, said difference being selected such as to produce a pre-determined stress state within the assembled structure under given conditions in relation to the assembly conditions.

The invention discloses a high-entropy alloy brazing filler metal for welding TA2 and 0Cr18Ni9Ti. The brazing filler metal comprises the following compositions according to atomic percentage: 20 to 25 percent of Ti, 25 to 30 percent of Cu, 20 to 25 percent of Ni, 15 to 20 percent of Fe, 10 to 13 percent of Cr, 0.5 to 5 percent of Sn, 0.01 to 2 percent of In, and 0.01 to 2 percent of Ga. The invention also discloses a method for preparing a high-entropy alloy brazing filler metal foil, which comprises the following steps: smelting the compositions to obtain high-entropy master alloy in steps by a super-high vacuum arc furnace; and controlling the linear speed of a roller at 5 to 40m/s by a single roller rapid setting device to obtain the high-entropy alloy brazing filler metal foil. The high-entropy alloy brazing filler metal has good flexibility, and is convenient for processing and assembling; and in welding, the high-entropy alloy brazing filler metal has good matching property with welded metal and alloy, brazing seams have excellent corrosion resistance and are single-phase fcc solid solution tissues, and joints have high comprehensive mechanical performance.

A device for thermal connection of an energy store to a cooling plate and/or a contact element, and a cooling plate on a contact element and/or a fluid is provided. The device for thermal connection has a first region having a first heat transfer property and at least one other region having another heat transfer property, wherein the first region and the at least one other region are arranged next to one another in relation to the heat transfer surface.

The present invention relates to a rotatory series-pole magnetic refrigerating system, comprising a moving magnetic body and at least one vertically-disposed magnetic series, wherein the magnetic series further comprising a plurality of heat insulated cavities, wherein the heat insulated cavities are interconnected in series successively, wherein the interior of the heat insulated cavities are provided with magnetic working mediums, and wherein the moving magnetic body is capable of magnetizes and demagnetizes the magnetic working mediums in a crossing pattern, wherein the upper and lower magnetic working mediums which are adjacent to any magnetic working medium in demagnetizing state in the same magnetic series must be in a magnetizing state, wherein the system further comprising a heat-flow structure, which assists the internal heat energy in the magnetic series to flow in one direction.

A soldering flux contains a base resin and an activating agent. The base resin contains a thermoplastic acrylic resin having a glass transition temperature of below −50° C. This enables to sufficiently suppress the occurrence of cracks in the flux residue after soldering, under the severe environment where the temperature difference is extremely large. The soldering flux has high reliability and excellent solderability, and is conventional with respect to the load against manufacturing cost and environment.

A thermoelectric generator has a heat conducting body that exchanges heat with the environment according to environmental temperature changes, a heat storing body, and a thermoelectric conversion unit and thermal resistance body arranged between the heat conducting body and the heat storing body. One end of the thermal resistance body and one end of the thermoelectric conversion unit are in contact with each other. The other end of the thermal resistance body is in contact with the heat conducting body, and the other end of the thermoelectric conversion unit is in contact with the heat storing body. The surface of the heat storing body is covered by a covering layer having certain heat insulation properties. The temperature difference generated between the heat conducting body and the heat storing body is utilized to extract electric energy from the thermoelectric conversion unit.

The invention discloses a power battery composite heat management system and a method thereof. The power battery composite heat management system comprises a water tank filled with a circulating fluid, a circulating pump, a sealing cover plate of the water tank, and a battery pack array which is fixedly mounted above the sealing cover plate and is composed of a plurality of battery cells, wherein a temperature equalizing plate and a heat pipe are adhered onto the surface of each battery cell respectively, and cooing sections of the heat pipes pass through the sealing cover plate to be arranged in the circulating fluid in the water tank; a circulating fluid inlet is formed in one side end of the water tank, a circulating fluid outlet is formed in the other side end of the water tank, and a circulating fluid turbulent flow structure is arranged inside the water tank, so that the circulating fluid flows into the circulating fluid outlet from the circulating fluid inlet of the water tank in a curve flowing manner. The system and the method thereof can solve the technical problems such as heat dissipation, battery pack temperature difference reduction, battery preheating and heat cyclic utilization under different working conditions of batteries; and meanwhile, the system is compact and simple in structure and convenient in installation and maintenance, accords with the development tendency of battery heat management systems and electric automobiles, and has good application prospects.

This invention relates to high-strength thermal abrasion resistance high-temperoducre alloy with low segregation and directional solidification properties. Its constitutions are (wt.%): Co9-12, Cr11-16, Mo1-3, W4-7, Al4-7, Ta4-7, Ti0-2, Re2-3, C0.01-0.15, 0.005-0.02 and Ni as the rest. The heat treatment for directional solidification steps are: 1240+-10deg.C for 0.5Hrs; 1260+-10deg.C for 0.5Hrs; 1280+-10deg.C for 4Hrs; air cooling to room temperature; 1120+-10deg.C for 4-1 Hrs; slow cooling to 1080+-10deg.C for 4Hrs; air cooling to room temperature; 900+-10deg.C; air cooling to room lemperature. This invention alloy can meet the requirement strength for design of turbine blade of aircraft engine but also has excellent thermal abrasion resistance property. The plane with the turbine blade of aircraft engine can be used for high altitude flight and flight in corrosion environment obove turbine blade of aircraft engine can be used for high altitude flight and flight in corrosion environment above sea.

The invention provides an ocean thermal energy conversion method and an ocean thermal energy conversion device. The method comprises the following steps of: heating a low-boiling-point working medium by using hot seawater on a surface of ocean; evaporating the low-boiling-point working medium; feeding into a turbine to push a turbo generator set to work for power generation; condensing working medium gas which is exhausted from the turbine into liquid by using cold seawater on a deep layer of the ocean; heating by using the hot seawater; feeding into the turbine to make the working medium gasevaporated; pushing the turbo generator set to work for the power generation; cyclically executing the steps; and continuously carrying out power generation. Power is generated by using ocean surfacewind power, a heat pump device is driven by the power, the temperature of the working medium is further raised by using a medium of the heat pump device, and the volume expansion ratio of the workingmedium is improved; and the temperature of the cold seawater is further reduced by using the medium of the heat pump device, the working medium exhausted gas is condensed by using the low-temperatureseawater, and a condensing effect of the working medium exhausted gas is improved. The method and the device improve the efficiency of closed cycle generation of ocean thermal energy conversion, realize the comprehensive utilization of ocean thermal energy and wind energy, have an important practical value, provide environment-friendly energy sources, and are easy to use and promote in large scale.

Disclosed is a passive power supply for electrical device detection. The passive power supply comprises a temperature differential power generation device, a power supply management module, a wireless sensor module and electromagnetic screens. A hot face of the temperature differential power generation device is directly attached to a portion of an electrical device, wherein the portion of the electrical device generates waste heat; and the waste heat released in operation of the electrical device is used for power generation. Electric energy generated by the temperature differential power generation device is transmitted to the power supply management module, and stable voltage and current are output for supplying power to the wireless sensor module after regulation by the power supply management module. The periphery of the power supply management module and the periphery of the wireless sensor module are wrapped by the electromagnetic screens. The power supply management module is composed of an energy storage module, a boosting module, a voltage reducing module and a constant flow source module. Output of the temperature differential power generation device is transmitted to the boosting module through the energy storage module and then supplies power to the voltage reducing module and the constant flow source module respectively. The voltage reducing module is in parallel connection with the constant flow source module. Both an input end of the voltage reducing module and an input end of the constant flow source module are connected to an output end of the boosting module.

In a cylinder block of an internal combustion engine, a water jacket in which coolant is circulated is formed around cylinder bores. In the cylinder block, an introduction passage, through which the coolant is introduced from the outside of the water jacket to the inside of the water jacket, is formed. A spacer, which extends along at least a portion of the periphery of the cylinder bores is provided in the water jacket. The spacer is disposed such that the inner wall surface of the spacer contacts the outer wall surfaces of the cylinder bores in an opening-side area of the cylinder block, where an opening of the introduction passage is formed, and the inner wall surface of the spacer does not contact the outer wall surfaces of the cylinder bores in an opposite opening-side area opposite to the opening-side area with respect to the cylinder bores.

The invention relates to a cold storage density improving method for the cold storage air conditioning system and a cold storage air conditioning system. The method of the invention adopts the technical proposal that during the cold discharging stage, under the state that the refrigerating unit is started, a part of high-temperature cooling water is taken as low-temperature cooling water to replace the water cooling system to be supplied to the condenser of the refrigerating unit; when the cold storage is required, the high-temperature cooling water is refrigerated and is changed into the low-temperature refrigerated water by the condenser of the refrigerating unit. The cold storage air conditioning system of the invention comprises a refrigerating unit, a cold storage equipment, a chilled water pump, an air conditioning unit, a cooling water system, one to a plurality of low-temperature cooling water circulating pipelines and two to a plurality of high-temperature refrigerated water refrigeration pipelines. The cold storage density improving method for the cold storage air conditioning system and the cold storage air conditioning system have the advantages that electric power consumption in the power consumption peak time can be more reduced, the operation cost can be reduced, and the cold storage density can be increased, thereby a positive effect can be taken on the peak load shifting of the electric network.

The invention belongs to the technical field of glass fiber and relates to an enhancement type spinning high-strength and high-modulus glass fiber composition applied to the fields of electromechanics, chemical engineering, aircrafts and the like. The enhancement type spinning glass fiber composition is prepared from, by weight, 56-65% of SiO2, 15-21% of Al2O3, 9-18% of MgO, 5-13% of CaO, 0.1-4% of Y2O3, 0-0.8% of Li2O, 0.1-1% of K2O+Na2O, and 3% or less of other impurities. The enhancement type glass fiber composition is prepared through a tank furnace technological process, by means of optimization and combination of the oxide components and particularly the introduction of Y2O3, the melting temperature, the clarification temperature and the shaping temperature of the enhancement type glass fiber composition are reduced under the situation that high strength and high modulus are guaranteed, the temperature difference between the shaping temperature and the liquidus temperature is increased, the wiredrawing situation is improved, and the enhancement type glass fiber composition is beneficial to the industrial production of high-strength and high-modulus fibers.

A loop type heat pipe includes an evaporator located to evaporate a refrigerant by heat-exchanging with a first fluid as a heat source, and a condenser located to liquefy and condense the evaporated vapor refrigerant by heat-exchanging with a second fluid to be heated. The condenser has a refrigerant condensation side on which the condensed liquid refrigerant flows, and a refrigerant un-condensation side on which the vapor refrigerant before being condensed flows. In addition, the loop type heat pipe is provided with a flow limitation portion for flowing the second fluid from the refrigerant condensation side toward the refrigerant un-condensation side. For example, the loop type heat pipe is suitably used for a waste heat recovery device.

The invention discloses a method for cultivating echeveria. The method comprises the following steps of selecting leaves of a houseleek succulent plant at the ambient temperature of 15-25DEG C, separating the leaves from a parent body at leaf stalks, dipping the leaves in carbendazim wettable powder solution for 2 to 3 seconds, and placing the leaves in a shady and cool place for 6 to 12 hours; mixing bone meal, gardening soil, pine needle and river sand, spreading out the mixture, and watering thoroughly; flatly placing the leaves on the surface of the mixed soil, placing in a shady, cool and ventilated place, germinating new leaves after 1 to 3 weeks, moving the houseleek succulent plant to an outdoor place, and cultivating the plant under the sun for 2 to 4 weeks; keeping the temperature in a range of 5-10DEG C at night and cultivating the plant under the sun in daytime. The mixture of the bone meal, the gardening soil, the pine needle and the river sand serves as a leaf cutting medium, so that the germination rate of the leaves is improved and reaches to more than 98 percent, sources are rich and the cost is low; a mode of cultivation in daytime in an exposing way and planting at low temperature at night is selected, so that temperature difference is enlarged, succulent leaves are rendered with color, and the attractiveness of the leaves is improved.

The invention provides a three-dimensional temperature detector and a manufacturing method for the same. The three-dimensional temperature detector comprises a substrate, a first dielectric layer positioned on the surface of the substrate and a cavity enclosed by the first dielectric layer, a first layer of thermoelectric pile material structure, a second dielectric layer structure, a second layer of thermoelectric pile material structure and a third dielectric layer structure, wherein a sixth groove and an infrared absorption layer structure filled in the sixth groove are arranged at the top of the cavity; the infrared absorption layer structure is provided with an eighth groove; the first layer of thermoelectric pile material structure is connected with the second layer of thermoelectric pile material structure through a fourth groove. According to the three-dimensional temperature detector and the manufacturing method for the same, the lengths of a thermoelectric pile thermocouple pair and a thermoelectric pile heat-insulating film can be increased to reduce the thermal conductivity, so that the temperature difference of a hot junction and a cold junction is increased, and the sensitivity of the temperature detector is improved; moreover, in a manufacturing process, process stability and device performance can be improved.

The invention discloses a battery pack. The battery pack comprises a plurality of cells and a temperature regulating module, wherein the temperature regulating module comprises a first flow channel, a second flow channel, and a third flow channel communicated with each other; and the third flow channel is vertically arranged between adjacent cells. The battery pack provided by the invention has the advantages of low energy consumption, good internal thermal balance, uniform overall heat dissipation, simple structure, and the like, and can be widely used in the related fields of electric vehicles, energy storage power stations and the like.