30results about How to "Increase heat transfer power" patented technology

The invention relates to a heat exchange plate. The heat exchange plate comprises semicircular grooves and projections and bent opposing edges, and further comprises unequal-width grooves, wherein the semicircular grooves and projections which are die-pressed are not interconnected and mutually perpendicular, and the S-like unequal-width grooves are symmetrically added to the non-groove and non-projection area. The S-like unequal-width grooves are symmetrically distributed on two sides (or at two ends) of the grooves and projections, so that the area of the non-groove area of the heat exchange plate is small. Production results show that the thickness of a cooling core made of the heat exchange plate with the semicircular grooves and grooves and the symmetrical S-like unequal-width grooves is two thirds of the original thickness, the strength and rigidity of a passage are better than those of cooling cores of original plate thickness and same specification; and the symmetrical S-like unequal-width grooves are added, so that heat exchange power of the cooling cores of the same specification is increased by 10%.

The invention aims to provide a heat derivation system for a long-term passive containment. The system mainly comprises a cooling water box (6), separating valves (5 and 6), an internal heat exchanger (1) and an external air cooling condenser-cooler (7), wherein the internal heat exchanger and the external air cooling condenser-cooler both adopt high-efficiency enhanced heat transfer pipes to improve the heat transfer efficiency and reduce the size of the heat exchanger; steam guide plates used for guiding the flow direction of internal airflow and protecting devices and pipelines are arranged inside an internal concrete containment. When accidents, such as LOCA and MSLB, happen, the system can provide long-term and efficient cooling for the containment without external power; temperature and pressure inside the reactor containment are always maintained under the permissible limit under a condition that human intervention and other external cooling measures are eliminated, so that integrity of the containment is maintained.

The invention discloses a bionic-based compact honeycomb structure heat exchanger core and a heat exchanger, comprising a plurality of radially spliced ​​straight passages, a closed shell is arranged outside the straight passages, and adjacent straight passages are The cold medium and the hot medium with opposite flow directions are respectively introduced, and the straight passages are divided into the first group of straight passages and the second group of straight passages according to the different media, and the adjacent first group of straight passages and the second group of straight passages share a wall , the first group of straight passages communicates with the medium pipeline through the corresponding reducing adapter pipes, and the second group of straight passages communicates with the medium pipeline through the housing. The invention has strong adaptability to special-shaped structures, compact structure, and the heat exchange surfaces are all primary heat exchange surfaces, realizing countercurrent heat exchange, good heat exchange performance, high heat exchange per unit weight, and high compressive strength.

The invention discloses a vehicle cooling system which comprises a radiator, a cylinder body, a cylinder cover, a flow control structure, a heater water return pipeline, an oil cooler water return pipeline, a cooler water return pipeline and a water pump. The flow control structure comprises a water temperature sensor, a control structure body and a main valve structure. According to the vehicle cooling system, the water temperature sensor sends water temperature signals of the heater water return pipeline, the oil cooler water return pipeline, the cooler water return pipeline and a water inlet pipeline of the radiator to the control structure body in time, and according to the water temperature signals, the control structure body flexibly controls the main valve structure to open or close all the pipelines, so that the situation that water flow branch flows in all the pipelines are flexibly controlled is realized, overall on-demand deployment is realized, and unnecessary energy consumption losses are avoided.

The invention discloses a multiple heat exchange system based on deep well heat exchange technology, comprising a well body, a first heat collection tube, a second heat collection tube, and a heat exchange box; the first heat collection tube and the second heat collection tube are completely identical in structure , the first heat collecting tube and the second heat collecting tube are vertically arranged in the well body, the first heat collecting tube includes an outer casing and an inner casing, the upper ends of the outer casing and the inner casing are provided with a sealing plate; the inner casing The upper side passes through the sealing plate and connects with the self-adaptive reversing device; this device adopts a double heat collection mode to provide stable and continuous heat supply to the heat collector end, ensuring continuous heat supply at the heat supply end, and improving a certain heat supply efficiency.

The invention discloses a heat exchanger core body based on bionic stacking three-dimensional configuration and a heat exchanger. The heat exchanger core body is formed by stacking a plurality of heatexchange units, each heat exchange unit comprises two layers of net-shaped plates, a plurality of grids are uniformly distributed on the opposite end faces of the net-shaped plate pieces, net rib nodes of the two layers of net-shaped plates are staggered with each other, and a plurality of flow passages and chambers communicating with each other are formed; and every two adjacent heat exchange units forms a cold side medium flow cavity and a hot side medium flow cavity. According to the heat exchanger core body, a plurality of micro cavities communicating with each other are formed in the medium flowing cavities to form a bionic bone marrow structure, and the bionic bone marrow structure has relatively large ratio surface area to volume, compared with a heat exchanger with an internal straight flow channel, the heat exchange power can be improved by 20% or more, and the weight of the heat exchanger is reduced by 20% or more; and the compactness of the heat exchanger is improved to be6 times or more of the compactness of a tube-shell heat exchanger, the heat exchanger can bear high pressure of about 20 MPa, has relatively high heat exchange efficiency under the condition that thehydraulic diameter is large, and is suitable for large heat flux density application scenes.

A closed circulation heating system comprises a liquid storage tank and a circulation water tank communicated with the liquid storage tank. An electric heating pipe is arranged in the circulation water tank, the circulation water tank is communicated with a plurality of horizontal branched boreholes through a central main borehole, a heat insulating pipe going down from the central main borehole is arranged in each horizontal branched borehole, inlets of the heat insulating pipes are communicated with the horizontal branched boreholes, outlets of the heat insulating pipes are connected with a heat exchanger and then go back to the circulation water tank, and the heat exchanger and a heating pipe network of users form a circulation loop. Well drilling cost is lowered, heat exchange power is increased, pollution to strata during operating of the system is avoided, the closed circulation heating system belongs to an environmental-friendly system, and the problems of poor stability in system operating and relatively short equipment service life caused by adoption of geothermal water are solved. In addition, the closed circulation heating system is high in applicability, free of limitation of geographical positions and geothermal resources, capable of being established at any place and low in operating expense.

The invention relates to a heat exchange plate. The heat exchange plate comprises semicircular grooves and projections and bent opposing edges, and further comprises unequal-width grooves, wherein the semicircular grooves and projections which are die-pressed are not interconnected and mutually perpendicular, and the S-like unequal-width grooves are symmetrically added to the non-groove and non-projection area. The S-like unequal-width grooves are symmetrically distributed on two sides (or at two ends) of the grooves and projections, so that the area of the non-groove area of the heat exchange plate is small. Production results show that the thickness of a cooling core made of the heat exchange plate with the semicircular grooves and grooves and the symmetrical S-like unequal-width grooves is two thirds of the original thickness, the strength and rigidity of a passage are better than those of cooling cores of original plate thickness and same specification; and the symmetrical S-like unequal-width grooves are added, so that heat exchange power of the cooling cores of the same specification is increased by 10%.

The embodiment of the invention discloses an embedded micro-pump driving type heat dissipation structure and a heat dissipation method, and relates to the technical field of heat dissipation devices.The key points of the technical scheme are that the structure comprises a heat dissipation shell, and a heat dissipation cavity is formed in the inner side of the heat dissipation shell; the heat dissipation cavity is filled with a heat dissipation working medium; an embedded micro-channel forced cooling module for continuously pumping out and inputting a heat dissipation working medium in the heat dissipation cavity is arranged at the outer side of the heat dissipation shell; and a thermoelectric conversion module for transferring heat at one side of the heat dissipation shell to the other side of the heat dissipation shell is arranged at the inner side of the heat dissipation cavity. The heat dissipation method comprises the following heat dissipation steps: S1, starting a micro-pump, wherein the internal heat dissipation working medium circularly flows to dissipate heat; S2, detecting the surface temperature of the to-be-cooled device, and selecting heat recycling or forced cooling.The problems that in the prior art, a common radiator is used for convection heat dissipation, the temperature of the surface of a chip is still very high, and the heat dissipation effect is poor aresolved.

Stainless steel plate pre-embedded steel plate connection interface clapboard underground granary, set a parapet interface on the inner surface of the granary, the parapet interface includes a steel plate connection interface and a stainless steel clapboard; the connection interface is continuous, and the clapboard is continuous with the welding interface Welding achieves a sealed connection with the welding interface, and there is a gap between two adjacent stainless steel parapets; or the connection interface is discontinuous, and the welding connection between the clapboard and the connection interface plays a fixed role and two adjacent stainless steel parapets The panel splicing connection includes welding connection, adhesive connection and undercut connection; the stainless steel wall panel and the inner surface of the structure form a closed space; the closed spaces are respectively communicated with negative pressure sources. Negative pressure vacuum also has the functions of drying, killing and slowing down the metabolism of grains. The energy consumption of underground cooling granaries in the Yangtze River Delta region is negligible in the first summer when the storage temperature does not exceed 8°C. Rice stocks are expected to be extended to eight years from the current two years.

The invention discloses a double-well re-injection geothermal exploitation system based on a fracturing technology. The double-well re-injection geothermal exploitation system based on the fracturing technology comprises a first re-injection well, a second re-injection well and a water taking well arranged between the first re-injection well and the second re-injection well, wherein the water taking well is communicated with the first re-injection well and the second re-injection well through cracks in a heat storage layer respectively; the water taking well is connected with the heat release side inlet of a heat exchanger via a sand remover, the heat release side outlet of the heat exchanger is connected with the first re-injection well and the second re-injection well respectively, and the heat absorption side of the heat exchanger is communicated with the heating pipe network of a user. Because the water taking well is communicated with the first re-injection well and the second re-injection well by virtue of the cracks in the heat storage layer respectively, and the cracks are arranged in the heat storage layer, according to the double-well re-injection geothermal exploitation system based on the fracturing technology disclosed by the invention, geothermal tail water can be completely re-injected in the heat storage layer through the cracks to ensure the sustainable development of geothermal resources, thus reducing the adverse effects of the geothermal tail water on environment and ecology; meanwhile, when the geothermal tail water flows through the cracks, the heat exchange area of a fluid and the heat storage layer is greatly increased, and the heat exchange power is increased.

The invention discloses an engine exhaust cooler which comprises a shell (1), wherein the shell (1) is internally provided with a fume runner and a coolant runner which intersect with each other; the fume runner comprises guide plates (10); the coolant runner comprises finned tubes (3); the guide plates (10) are internally provided with the finned tubes (3); the finned tubes (3) and the guide plates (10) are correspondingly arranged so as to achieve an optimal cooling effect.

The present disclosure discloses a lead-supercritical carbon dioxide intermediate heat exchanger, including four modular printed circuit board heat exchangers (modular PCHEs), a cylinder, vertical partition boards, horizontal partition boards and heat exchange fluid channels. S-CO2 fluid flows upward along microchannels in PCHE cold side heat exchange plates after reaching the bottom of the cylinder along a square central down tube formed by the four PCHEs to absorb heat from hot side heat exchange plates. S-CO2 leaves the intermediate heat exchanger upward after being collected by a current collector at the other end of each PCHE. Liquid lead enters microchannels in the PCHE hot side heat exchange plates from a duct at the upper end of the cylinder to transfer heat to S-CO2 on the other side, and then flows out of the intermediate heat exchanger from a duct at the lower end of the cylinder to complete heat exchange.