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1364results about How to "Improve heat transfer effect" patented technology

Multi-operating mode energy-saving controlled combined type thermostatic and humidistatic air conditioning unit with thermometal compound box body structure

The invention relates to a multi-operating mode energy-saving controlled combined type thermostatic and humidistatic air conditioning unit with a thermometal compound box body structure special for nuclear power stations. The air conditioning unit comprises a control system and a box body structure, wherein a primary-efficiency filter, a medium-efficiency filter, a surface cooler, a heater, a humidifier and a blow-off device are sequentially arranged in the box body; the front side of the primary-efficiency filter is provided with a fresh air and return air mixing section, and inlets of fresh air and return air are respectively provided with a fresh air proportioning valve and a return air proportioning valve; the control system adopts a programmable logic controller (PLC) and adopts air conditioning multi-operating mode zone control to realize the energy-saving operation of the unit; the surface cooler adopts a large temperature difference cold water heat exchanging technology and can save the investment and operation expenses of a water system; and the box body adopts a double-layer compound structure and an anti-shock device to meet the special requirements on the nuclear power stations. The invention has the characteristics of high efficiency, energy saving, good tightness, strong anti-shock capacity, safety, reliability, long service life, and the like.
Owner:广东吉荣核电设备暖通技术有限公司

Corrosion-resistant hygroscopic coat and preparation method thereof

The invention discloses a corrosion-resistant hygroscopic coat and a preparation method thereof. The coat comprises an upper layer and a lower layer, wherein the lower layer is a corrosion-resistant ground coat, and the upper layer is a hygroscopic surface coat. The preparation method of the coat comprises the steps of: (1) coating water-based corrosion-resistant ground paint A on a base material, and drying the paint A to form a corrosion-resistant ground coat with the thickness being 0.1-5.0g/m<2>; and (2) cooling the corrosion-resistant ground coat, coating water-based corrosion-resistant ground paint B on the corrosion-resistant base coat, and drying to form a hygroscopic surface coat with the thickness being 0.5-100g/m<2> so as to obtain a corrosion-resistant hygroscopic coat on the base material. The invention is simple in preparation process, suitable for continuous production, high in production efficiency, and environment-friendly, so that the good binding force is formed between the formed coats and the base material and among the coats, and obtained material is good in hygroscopicity, corrosion resistance and heat transfer, attractive in appearance, stable in performance, and suitable for the preparation of a rotating wheel of a dehumidifier.
Owner:GUANGZHOU HUMAN CHEM

Multi-scale capillary core flat plate loop heat pipe type heat-dissipation device

InactiveCN103629963ASolve flow resistanceSolve the paradoxical relationship between capillary suctionSemiconductor/solid-state device detailsSolid-state devicesVapor liquidSuction force
The invention relates to a multi-scale capillary core flat plate loop heat pipe type heat-dissipation device, and belongs to the technical field of phase transition heat dissipation. The heat-dissipation device comprises an evaporating part, a condensing part, a compensating cavity, a gas phase pipeline and a liquid phase pipeline, wherein the gas phase pipeline is connected with the evaporating part and the condensing part, and the liquid phase pipeline is connected with the condensing part and the compensating cavity; a base plate of the evaporating part is in a flat plate shape, metal powder is sintered to form two layers of multi-scale capillary cores at the upper surface of the base plate, and a steam channel is constructed between the two layers of capillary cores; a layer of water absorption cotton tightly covers a second layer of capillary cores and is taken as a third layer of capillary cores, and the three layers of capillary cores form a multi-scale structure. By utilizing the multiple layers of multi-scale capillary cores and the constructed steam channel, the problem of the contradictoriness between the vapor-liquid flow resistance and the capillary suction force is solved, the starting temperature of a loop heat pipe is lowered, the high heating flux bearing capacity of the heat-dissipation device is improved, and the instability in heat transfer is reduced; the multi-scale capillary core flat plate loop heat pipe type heat-dissipation device has the advantages of high cooling capacity, large heat flux bearing capacity, low starting temperature, small temperature fluctuation, good antigravity performance and long transmission distance.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING)

Air conditioner circulating system and method for controlling air supply amount of dual-stage compressor

The invention provides an air conditioner circulating system and a method for controlling the air supply amount of a dual-stage compressor. The system comprises a compressor, an outdoor heat exchanger, a flash evaporator, an indoor heat exchanger, a first temperature sensing device, a first flow adjusting device and a second temperature sensing device, wherein the compressor is provided with a first air suction port, a second air suction port and an air outlet; the outdoor heat exchanger is provided with a first end interface and a second end interface; the first end interface is communicated with the second air suction port or the air outlet; the flash evaporator is provided with a first interface, a second interface and a third interface; the first interface is communicated with the first air suction port; the second interface is communicated with the second end interface; the indoor heat exchanger is provided with a third end interface and a fourth end interface; the third end interface is communicated with the third interface; when the outdoor heat exchanger is communicated with the second air suction port, the fourth end interface is communicated with the air outlet; when the outdoor heat exchanger is communicated with the air outlet, the fourth end interface is communicated with the second air suction port; the first temperature sensing device is arranged on a first connection pipeline between the first air suction port and the first interface; the first flow adjusting device is arranged on a second connection pipeline between the outdoor heat exchanger and the second interface; the second temperature sensing device is arranged on the first connection pipeline. According to the air conditioner circulating system and the method, the air supply amount of the compressor can be controlled.
Owner:GREE ELECTRIC APPLIANCES INC

Efficient and compact pre-cooling heat exchanger for pre-cooling gas sucking type engine

The invention discloses an efficient and compact pre-cooling heat exchanger for a pre-cooling gas sucking type engine. The efficient and compact pre-cooling heat exchanger for the pre-cooling gas sucking type engine comprises a pre-cooling heat exchanger body in the shape of a similar cylinder; the cross section of the similar cylinder is in the shape of a ring different in diameter; the longitudinal section of the similar cylinder is formed by two symmetrically arranged arc segments; the center angle of each arc segment is 45 degrees; the pre-cooling heat exchanger body comprises a cold flow outlet pipe, a cold flow inlet pipe and a plurality of heat exchanging pipes; each heat exchanging pipe is in the shape of an arc; the arc-shaped center angle of each heat exchanging pipe is 45 degrees; and the heat exchanging pipes are distributed into the similar cylinder in a crossed manner. The efficient and compact pre-cooling heat exchanger for the pre-cooling gas sucking type engine can have the engineer realizability on the premise that the heat exchanging effect is guaranteed, so that air incoming flow in front of a gas compressor can be pre-cooled, the high temperature over-running problem of gas compressor blades is solved, the engine thrust is increased, the flight envelop is extended, the welding difficulty is effectively reduced, the frosting blockage problem is effectively solved, the engineer realizability is achieved under the current technology, and after the efficient and compact pre-cooling heat exchanger for the pre-cooling gas sucking type engine is applied to the pre-cooling gas sucking type engine, the engine performance can be substantially improved.
Owner:PLA PEOPLES LIBERATION ARMY OF CHINA STRATEGIC SUPPORT FORCE AEROSPACE ENG UNIV

Constant-pressure multiple-effect evaporation condensation sea water desalination device with air medium

The invention discloses a constant-pressure multiple-effect evaporation condensation sea water desalination device with an air medium, which mainly comprises a low-and-medium temperature heat source (13), a first-stage heating evaporator (14), an evaporation condenser (4) and a last-stage condenser (8). The first-stage heating evaporator (14), the evaporation condenser (4) and the last-stage condenser (8) are installed in sequence closely, and the low-and-medium heat source (13) and the first-stage heating evaporator (14) are connected together. The first-stage heating evaporator (14), the evaporation condenser (4) and the last-stage condenser are all formed by combining a plurality of heat exchange plates which are arranged from left to right in sequence, and a gap is reserved between every two adjacent heat exchanging plates to form a flow channel for heat exchange fluid. By adopting the plate-type heat exchange principle, the sea water desalination device realizes multiple-effect air humidification and dehumidification evaporation and condensation for sea water desalination under constant pressure. Heat and moisture transfer is performed between sprayed sea water and overflowing air, and the condensation latent heat of fore effect heat and moisture air can be absorbed at the same time, and therefore, energy recovery is realized and the fore effect heat and moisture air can be condensed to obtain fresh water.
Owner:GUANGDONG FIVESTAR SOLAR ENERGY

Coaxial heat exchanger

The invention provides a coaxial heat exchanger. The coaxial heat exchanger comprises an outer tube and an inner tube which are sleeved coaxially; the main body section of the inner tube is a multi-head spiral tube with a plurality of parallel spiral slot structures; both ends of the inner tube are used as a first fluid inlet and a first fluid outlet respectively; both ends of the outer tube are used as a second fluid inlet and a second fluid outlet respectively; a first fluid passageway is formed in the inner tube; a second fluid passageway consisting of a plurality of parallel spiral slots is formed between the outer tube and the inner tube; the second fluid passageway uniformly encircles the first fluid passageway; first fluid flows into the inner tube and flows out of the inner tube through the first fluid passageway; second fluid flows in the second fluid passageway; and the two kinds of fluid flows reversely so as to exchange heat through the tube wall of the inner tube. The coaxial heat exchanger provided by the invention has a large heat exchange area and high heat exchange efficiency; and the metal consumption of unit heat exchange area is low and the volume of the heat exchanger can be reduced, so the whole structure is compact and rational, and the coaxial heat exchanger is easy and convenient to operate and install.
Owner:EXTEK ENERGY EQUIP ZHEJIANG

Flue gas waste heat recovery method of aluminum oxide gaseous state suspending calcining furnace

The invention discloses a gas waste heat recovery method of aluminum oxide gas suspension calciner, which comprises the following steps: arranging a gas heat exchanger on a gas exhaust pipe between an electrostatic dust collector and an ID blower of the calciner to recover the waste heat of exhaust gas of the calciner; arranging a bypass flue at the inlet/outlet end of the gas heat exchanger; feeding condensed water from an aluminum oxide evaporation process to the gas waste heat recovery heat; and heating the water supply of the system in a two-stage heating form to improve the incoming water temperature of the gas heat exchanger. The heat recovered by the waste heat recovery can meet the requirement for heating aluminum hydroxide washing water of a pan filter. The method can freely adjust the quantity of gas passing through the gas heat exchanger according to the output of the calciner, and has the advantages of high heat exchange efficiency and adjustable resistance of the heat exchanger system. Meanwhile, the housing of the gas heat exchanger contacting the gas has high temperature to prevent acid dew point corrosion, thus improving the service life of the equipment. The temperature and the flow rate of hot water in the waste heat system can be adjusted freely.
Owner:GUIZHOU BRANCH CHINA ALUMINUM IND

Refrigeration-only air conditioner and control method thereof

The invention discloses a refrigeration-only air conditioner and a control method of the refrigeration-only air conditioner. The refrigeration-only air conditioner comprises a double-cylinder compressor, an outdoor heat exchanger and an indoor heat exchanger assembly. The double-cylinder compressor comprises a shell, a first air cylinder and a second air cylinder, and the value of the volume ratio of the first air cylinder to the second air cylinder ranges from one to twenty. The outdoor heat exchanger is provided with a flow-in port and two flow distribution ports. The indoor heat exchanger assembly comprises a first indoor heat exchange portion and a second indoor heat exchange portion, wherein the two ends of the first indoor heat exchange portion are connected with a first air suction portion and one of the flow distribution ports respectively, the two ends of the second indoor heat exchange portion are connected with a second air suction portion and one of the flow distribution ports respectively, a throttling element is arranged between the first indoor heat exchange portion and the outdoor heat exchanger in series, and a throttling element is arranged between the second indoor heat exchange portion and the outdoor heat exchanger in series. The refrigeration-only air conditioner is high in level of energy efficiency, and good in effect of energy saving.
Owner:GD MIDEA AIR-CONDITIONING EQUIP CO LTD +1

New concept high-speed aerocraft propulsion system layout method

The invention provides a new concept high-speed aerocraft propulsion system layout method. Two cycles are built in a propulsion system, namely a Brayton cycle with the air as the working medium and a closed cycle with supercritical state fluid as the working medium. The two cycles are coupled through a supercritical microscopic scale heat exchange technology, a supercritical state fluid turbine and compressor power balance. By adjusting related valves, the propulsion system can be in a turbofan engine model when taking off or flying at a low speed and in a turbine rocket engine model when flying at a high Mach number, so that it is guaranteed that the aerocraft can effectively cruise for a long time in both a subsonic state and a supersonic state. Through the supercritical microscopic scale heat exchange technology, the gas flow temperature at an inlet of a compressor can be effectively reduced when the propulsion system is flying at a high speed, and when the supercritical microscopic scale heat exchange technology is applied in combination with a closed cycle technology, optical distribution of energy of the propulsion system can be achieved. By means of the method, the defects of the propulsion system of an existing high-speed aerocraft are overcome, and working performance of the high-speed aerocraft propulsion system is remarkably improved when Ma ranges from 0 to 5.
Owner:BEIHANG UNIV
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