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740results about How to "Improve heat transfer efficiency" patented technology

Sodium sulfate wastewater treatment process

The invention relates to a sodium sulfate wastewater treatment process. The treatment process sequentially comprises the following steps: (1) introducing new sodium sulfate wastewater into a preheating unit, and preheating to raise the temperature; (2) introducing the preheated sodium sulfate wastewater into a single-effect falling film evaporator, and performing heating evaporation concentration to obtain a single-effect concentrate; (3) introducing the single-effect concentrate into a double-effect falling film evaporator, and performing further heating evaporation concentration to obtain a double-effect concentrate; (4) feeding the double-effect concentrate into a forced circulation evaporation crystallizer through a material transfer pump, performing heating evaporation crystallization, and discharging crystal slurry containing sodium sulfate crystals from a salt leg at the bottom of an evaporation chamber of the forced circulation evaporation crystallizer; (5) separating the crystal slurry containing sodium sulfate crystals discharged from the salt leg by a centrifuge; (6) feeding the sodium sulfate crystals separated out by the centrifuge into a fluidized bed drying system through a material conveyor belt, and drying; and (7) introducing the dried sodium sulfate crystals into an automatic packaging system, and packaging to obtain an industrial sodium sulfate finished product. The process is low in energy consumption, and can realize full recovery of sodium sulfate.
Owner:JIANGSU MYANDE ENERGY SAVING EVAPORATION EQUIP CO LTD

Fresh air ventilation and self-cleaning control method and device thereof

The invention discloses a fresh air ventilator and a self-cleaning control method and device thereof. The method comprises following steps: when the fresh air ventilator is in the self-cleaning mode, the air returning dry ball temperature and the air returning wet ball temperature of the fresh air ventilator can be detected; according to the air returning dry ball temperature and the air returning wet ball temperature, the air returning exposed point temperature of the fresh air ventilator can be calculated; the temperature of a heat exchanger of the fresh air ventilator can be detected; according to the heat exchanger temperature and the air returning exposed point temperature, the fresh air ventilator is controlled, and condensate water formed on the surface of the heat exchanger of the fresh air ventilator is used for self cleaning. According to the cleaning control method of the fresh air ventilator, the self-cleaning function of the fresh air ventilator is achieved, the heat exchange efficiency of the fresh air ventilator can be improved, electric energy is saved, the fresh air quality can be improved, and the user experience is improved. The invention further discloses a non-temporary computer readable storage medium.
Owner:GD MIDEA HEATING & VENTILATING EQUIP CO LTD +1

Power battery box device used for new energy automobile and control method thereof

The invention discloses a power battery box device used for a new energy automobile and a control method thereof. The power battery box device comprises a battery box body and an electronic component arranged in the battery box body, wherein the battery box body is provided with a gas inlet used for being communicated with a high pressure gas source, and a gas outlet communicated with the outer side, and the gas inlet and the gas outlet are communicated through the space in the position of the electronic component; the power battery box device used for the new energy automobile also comprises a controller for controlling the working state of the high pressure gas source according to environmental parameters; in the battery box device, the electronic component is cooled or preheated by the existing high pressure gas source on the whole automobile, gas is directly contacted with the surface of the electronic component for heat exchange, secondary heat transfer is carried out without the need of a third part, and the heat exchange efficiency is improved; and the inhouse pressure of the high pressure gas source is utilized to drive the circulation of gas flows in the battery box by the device, so that the device has good gas flow circulation performance, and the heat exchange efficiency of the gas and the electronic component is further improved.
Owner:WEICHAI POWER CO LTD

Solar thermal power system

The invention relates to a solar thermal power system. The system, which is integrated with particulate heat absorption, heat storage and direct contact heat exchange, comprises a particulate heat absorption unit, a particulate heat storage unit, a direct contact type superheated steam generation unit and a steam power unit. In the operation process of the system, heat storage particles first absorb solar radiation heat energy in the particulate heat absorption unit to become high-temperature heat storage particles, the high-temperature heat storage particles are stored in the particulate heat absorption unit under atmospheric pressure, the high-temperature heat storage particles drop under gravity into the high-pressure direct contact type superheated steam generation unit to generate high-pressure superheated steam, and the superheated steam is inputted into the steam power unit after passing through a buffer tank and a pressure regulation valve. The solar thermal power system can store heat energy in a large capacity under atmospheric pressure and directly generate high-pressure superheated steam for outputting power to the outside, has the characteristics of simple structure, high stored heat temperature, low cost and the like, and is particularly suitable for the development of high-power, high-efficiency, high-temperature and low-cost new-generation solar thermal power generation systems.
Owner:中科中蓝能源科技(北京)有限公司

Graphene conduction oil additive and preparation method thereof

The invention discloses a graphene conduction oil additive and a preparation method thereof. The graphene conduction oil additive is prepared from the components of base solution conduction oil, graphene, a metal passivator, an antirust agent and antioxygen at a certain proportion and according to the processes of mechanical stirring, high speed stirring and ultrasonic dispersion. The graphene conduction oil additive can be directly added into conduction oil, and the defects of traditional conduction oil that gas or low-boiling-point substances such as micromolecular substances are produced by high temperature pyrolysis, and are polymerized to produce substances with higher molecular weight and even high-boiling-point substances such as coke, combustion is easily caused, and the like can be overcome. The graphene conduction oil additive can be used to effectively improve the heat conduction efficiency of the conduction oil, prevent the conduction oil from being partially over-heated during use, delay ageing and coking of the conduction oil, effectively improve conduction oil indexes such as flash point, pour point, kinematic viscosity and initial boiling point, prolong the service life of the conduction oil, and realize energy conservation and consumption reduction.
Owner:SPECIAL EQUIP SAFETY SUPERVISION INSPECTION INST OF JIANGSU PROVINCE

Inner-tank heating structure of electric kettle

The invention discloses an inner-tank heating structure of an electric kettle, which comprises a kettle lid and a kettle body, wherein the kettle body is provided with a heating plate assembly, a water solution is filled into the kettle body, and a detachable inner tank is arranged in the kettle body; the inner tank is in a hollow structure forming a cavity for accommodating the food, and the inner tank is nested or inserted in the kettle body; and a positioning groove is protruded from an opening of the kettle body, the opening of the inner tank is provided with a turned edge or a flanged edge matched with the positioning groove, and the inner tank is attached to the groove. The inner-tank heating structure disclosed by the invention has the advantages that through adding the detachable inner tank in the kettle body, the functions of carrying out heating, stewing, heat preservation and the like on the food in the inner tank can be realized through transmitting the heat of the water solution in the kettle body to the inner tank according to the heat conduction property of the inner tank; when the ceramic inner tank is not required to be used, the inner tank can directly be taken out from the kettle body, and then the kettle can realize the function of boiling water through the heating of the heating plate assembly, because the outer wall of the inner tank is surrounded by the water solution and the outer wall of the kettle body, the heat loss can be reduced, and the heat transfer efficiency can be improved; and the inner-tank heating structure disclosed by the invention is simple and reasonable, energy-saving, and environmental-friendly, and is convenient and quick in assembling.
Owner:GUANGDONG XINBAO ELECTRICAL APPLIANCES HLDG CO LTD

Independent primary air system provided with heat pipe exchanger and working method thereof

The invention provides an independent primary air system provided with a heat pipe exchanger. The independent primary air system is characterized by comprising a precooling unit, a cooling dehumidification unit, a reheating unit and an air supply unit. The precooling unit, the cooling dehumidification unit, the reheating unit and the air supply unit are sequentially arranged between an inlet and an outlet of the primary air system; the air supply system is arranged on the outlet of the primary air system. Primary air is precooled through an evaporator side of the heat pipe exchanger; the preprocessed primary air is cooled again through the cooling dehumidification unit; the primary air is bent through an air pipe and then heated again through a condenser side of the heat pipe exchanger; the processed air is sent indoors through the air supply unit, and indoor temperature and humidity are controlled to be 26 DEG C +/-0.5 DEG C and 50%+/-1%. The heat pipe exchanger of the independent primary air system achieves heat recovery in the precooling unit and the reheating unit, heat exchange efficiency is high, extra energy loss is avoided, and discharged heat can be recovered to the maximum; indoor air quality is improved; finally an air-conditioning system can save energy by 6%-9%.
Owner:TIANJIN SINO GERMAN VOCATIONAL TECHN COLLEGE +2

Grooved heat pipe with circumferential grooves and connection method of grooved heat pipe

The invention discloses a grooved heat pipe with circumferential grooves and a connection method of the grooved heat pipe. A plurality of axial grooved heat pipe shells with circumferential grooves are combined into a special-shaped grooved heat pipe system through temperature unifying connectors, and in the special-shaped grooved heat pipe system, axial grooves communicate with steam channels. The multiple circumferential grooves which are formed in parallel are formed in the positions of end openings, connected with the temperature unifying connectors, of the axial grooved heat pipe shells,and each circumferential groove is connected with the axial grooves in the axial grooved pipe shells in a through manner. Each temperature unifying connector comprises a main pipe shell and a branchedpipe shell, wherein the main pipe shell and the branched pipe shell are internally provided with axial grooves and circumferential grooves, and the sizes of the axial grooves and the circumferentialgrooves in the main pipe shell and the branched pipe shell are completely consistent with those of the axial grooves and the circumferential grooves of the axial grooved heat pipe shells. The special-shaped grooved heat pipe system in which the axial grooves communicate with the steam channels can take the place of a traditional orthogonal overlapped heat pipe system, overlapping heat resistance between heat pipes is avoided, the heat transfer efficiency and the temperature unifying effect are greatly improved, and the heat pipe arrangement difficulty is lowered.
Owner:BEIJING RES INST OF SPATIAL MECHANICAL & ELECTRICAL TECH

Passive waste heat discharging system on secondary side of steam generator

The invention belongs to a special safety system for a nuclear power plant, specifically relates to a passive waste heat discharging system on a secondary side of a steam generator. The passive waste heat discharging system comprises a direct current steam generator, wherein a passive discharged waste heat exchanger is arranged between a main steam pipeline and a main water feeding pipe of the direct current steam generator, and inlet and outlet pipelines of the passive discharged waste heat exchanger are respectively provided with an inlet isolating valve and an outlet isolating valve, and the outlet isolating valve is frequently closed. The passive waste heat discharging system provided by the invention is arranged on the main steam pipeline and the main water feeding pipeline at the side of the steam generator and fully utilizes the characteristic of high heat exchange efficiency between steam and water phases, and the decay heat of a reactor core is derived under a working condition of power cut of the whole plant; thus, the safety of a reactor is guaranteed, requirements on arrangement space are lowered, pipelines directly connected with a reactor coolant system are reduced, the cracking probability of the pipelines is reduced, and security is improved.
Owner:NUCLEAR POWER INSTITUTE OF CHINA

Air-conditioner indoor unit and control method thereof

The invention provides an air-conditioner indoor unit and a control method thereof. The air-conditioner indoor unit comprises a machine shell, an air wheel, a heat exchanger, an air guiding assembly and a control device. Specifically, an air return opening is formed in the machine shell; the heat exchanger comprises a plurality of heat exchange areas; the air guiding assembly is located between the heat exchanger and the air return opening so as to adjust the air guiding angle of the air guiding assembly so that the distribution proportion of the blast capacity among the heat exchange areas can be changed; the control device is connected with the air guiding assembly and the heat exchanger and used for detecting the surface temperature of the heat exchanger and adjusting the air guiding angle according to the surface temperature. According to the air-conditioner indoor unit, the air guiding angle of the air guiding assembly can be adjusted according to the surface temperature of the heat exchanger, and the blast capacity proportion of the heat exchange areas on the heat exchanger can be adjusted through convection, so that the temperatures of the heat exchange areas on the heat exchanger are kept in dynamic balance, the whole heat exchange efficiency of the heat exchanger is improved, the energy consumption of the air-conditioner indoor unit is lowered, and the purposes of energy conservation and environmental protection of a product are achieved.
Owner:GD MIDEA AIR-CONDITIONING EQUIP CO LTD +1

Lamella heat exchanger and manufacturing method thereof and lamella evaporative condensing equipment

The invention discloses a lamella heat exchanger comprising a lower pipe plate and heat exchange plate bundles which are vertically welded on the lower pipe plate. The heat exchange pipe bundle arranged on the outmost side is provided with a runner inlet and a runner outlet; each heat exchange pipe bundle comprises at least two mutually-overlapped and welded heat exchange plate sheets; transversely and longitudinally-arranged grooves and/or flanges are evenly distributed on the surfaces of the heat exchange plate sheets; and zigzag structures are arranged at the top ends of the heat exchange plate sheets. The invention simultaneously provides lamella evaporative condensing equipment applying the lamella heat exchanger, comprising an upper box body and a lower box body which are mutually connected as well as a water pump and a circulating water pipeline; an air inlet is formed above the upper box body; a spray device is arranged below the air inlet; and the lamella heat exchanger is positioned below the spray device and fixed to the upper box body through bolts. The invention simultaneously discloses a manufacturing method of the lamella heat exchanger. The lamella heat exchanger and the manufacturing method thereof and the lamella evaporative condensing equipment have high heat exchange efficiency, convenient cleaning, simple processing and low cost.
Owner:SOUTH CHINA UNIV OF TECH

Case-type multi-shell-pass countercurrent speedup type shell and tube heat exchanger

InactiveCN101929811ASmall heat transfer temperature differenceImprove heat transfer efficiencyHeat exchanger casingsStationary tubular conduit assembliesRefrigerantMulti shell
The invention provides a case-type multi-shell-pass countercurrent speedup type shell and tube heat exchanger. The heat exchanger comprises a shell (5), wherein one end of the shell is provided with a tube plate I (3); a tube case (2) is connected outside the tube plate I (3), and a baffle is arranged inside the tube case; the other end of the shell is provided with an end cover (11); a heat exchange tube (6) is arranged in the shell; the shell of the heat exchanger has a round-upside square-downside structure or a square-upside round downside structure; at least one layer of vertical countercurrent speedup guide plate (7) is arranged in the shell; and the inner part of the shell is separated into at least two shell passes to ensure that the number of pass of fluid outside a tube is the same as that of fluid in the tube, and the fluid outside the tube and the fluid in the tube have opposite flowing dictions along the axial direction. The heat exchanger can make the direction of the fluid along the axial direction in the shell pass in the shell and tube heat exchanger opposite to that of the fluid in the tube, make the fluids quickly flow for heat exchange, reduce heat transfer temperature difference of the fluids, improve heat exchange efficiency, and realize synchronous composite utilization of double heat sources. The special shell structure ensures more compactness in heat exchange tube arrangement, can effectively reduce the volume of the heat exchanger, and reduces the filling amount of a refrigerant.
Owner:ZHONGYUAN ENGINEERING COLLEGE

Intermediate billet inclined jet flow cooling and shape control method

The invention discloses an intermediate billet inclined jet flow cooling and shape control method. The billet with the tapping temperature being 1140-1200 DEG C is descaled by a descaling box and enters a rolling mill for rough rolling; the last three-pass speed loading balance coefficient of rough rolling of a rolled piece is adjusted to enable the strip shape of the intermediate billet with the thickness of 50-250 mm to be flat and straight; after the rough rolling, the intermediate billet enters an inclined jet flow cooling device through a pre-straightener for one-off through type cooling or forward and reverse reciprocating type cooling; gap jet nozzle and high-density jet nozzle typed cooling collectors are continuously opened or opened at intervals by taking 'forward ejection and reverse ejection' or 'forward ejection and forward ejection and reverse ejection' as units; setting of flow rates of a forward upward collector and a reverse upward collector gives consideration to the heat exchanging efficiency of cooling water and the intermediate billet, flow direction of scouring water and residual water, and the cooling strip shape of the intermediate billet. With adoption of the method, the temperature waiting time of the intermediate billet is shortened, the rolling efficiency is improved, and the structure property of variety steel is improved.
Owner:NANJING IRON & STEEL CO LTD

Dust collecting and air cooling heat exchanger

The invention discloses a dust collecting and air cooling heat exchanger, relating to a gas purification device, in particular to the dust collecting and air cooling heat exchanger which is used for a biomass fluidized bed and fulfills the functions of dust collection and air cooling heat exchange. The dust collecting and air cooling heat exchanger mainly comprises a cyclone dust collector, wherein the cyclone dust collector consists of a cylinder, a cone, a gas inlet pipe and a gas outlet pipe, the cone is arranged below the cylinder, the lower part of the cone is connected with an ash discharge pipe, the gas inlet pipe is communicated with the upper part of the cylinder along a tangent direction of the cylinder, and the gas outlet pipe is arranged in the cylinder. The dust collecting and air cooling heat exchanger is characterized in that a round pipe with both closed ends is also arranged in the cylinder of the cyclone dust collector and is sleeved on the gas outlet pipe, an interlayer between the inner wall of the round pipe and the outer wall of the gas outlet pipe is a heat exchange chamber, an air inlet is arranged at the upper end of the round pipe, and an air outlet is arranged at the lower end of the round pipe. Compared with the traditional equipment, the invention has six advantages that firstly, the functions of dust collection and air cooling heat exchange are simultaneously realized; secondly, the efficiency of dust collection and air cooling heat exchange is high; thirdly, ashes can be continuously discharged in the work process; fourthly, the structure is simple, and the operation is convenient; fifthly, the occupied area is small; and sixthly, the cost is low.
Owner:KUNMING DIANYAN NEW ENERGY TECH DEV
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