83 results about "Thermal stratification" patented technology

A tube picking mechanism is designed for use in an automated, ultra-low temperature (e.g. −80° C. or −135° C.) or cryogenic (e.g., about −140° C. to −196° C.) storage and retrieval system that stores biological or chemical samples. The samples are contained in storage tubes held in SBS footprint storage racks that are normally stored within an ultra-low temperature or cryogenic freezer compartment. The tube picking mechanism includes a tube picking chamber that is maintained at about −80° C., about −135° C. or at cryogenic temperatures in cryogenic applications. Active electrical and mechanical components are maintained in a compartment above and separate from the refrigerated, ultra-low temperature or cryogenic compartment. Thermal stratification inhibits heat transfer into the lower, ultra-low temperature or cryogenic compartment in which tube picking occurs from the upper compartment in which active electrical and mechanical components are located, and also inhibits heat transfer into the lower, ultra-low temperature or cryogenic compartment via an access door for tube storage racks.

A water pipe structure of a branch pipe line (12) connected to a main pipe (22) for flowing water therethrough, wherein a cavity flow suppressing means (30) is installed between the main pipe (22) and the branch pipe line (12) or in the branch pipe line to suppress a cavity flow produced in the closed branch pipeline, whereby the adverse effect of a thermal stratification formed by the cavity flow on the pipe can be eliminated.

Improvements to an apparatus for cooling and dispensing water or other beverages are: providing the apparatus with a collapsible bag to facilitate sanitizing the device, providing the apparatus with a chiller configured to prevent thermal stratification and freezeups of the liquid therein, providing the apparatus with a container positioned in a lower portion thereof prevent liquid leakage beneath the unit, providing the apparatus with adaptability for resupply by either bottle or building water supply, and providing the apparatus with a modular structure which can be largely disassembled without tools to facilitate cleaning, maintenance and repair.

The invention relates to a novel architecture for a nuclear reactor of the integrated type.The invention comprises:realising the hot area and cold area separation device for the primary sodium flow in the form of two walls with cuts,providing two pumping groups hydraulically in series, one for the flow of sodium from the hot area to the cold area through the intermediate exchangers and the other in the cold area;providing outlet windows of the intermediate exchangers below the lower wall;providing outlet windows of the removal exchangers of the decay heat above the cold area, wherein all of clearances between the walls with cuts and the heat removal exchangers and the height between the two walls with cuts are previously determined so as to, during normal operation, take up differential movements between the walls, exchangers and vessel and to make it possible to establish during normal operation a thermal stratification of the primary sodium in the space defined between the horizontal portions of the two walls and so as to reduce, in case of an unexpected stop of a single pumping group, the mechanical stress applied to the walls and due to the portion of the primary sodium flow passing between said clearances.

The invention relates to a novel architecture for a nuclear reactor of the integrated type. The invention comprises: realising the hot area and cold area separation device for the primary sodium flow in the form of two walls with cuts, providing two pumping groups hydraulically in series, one for the flow of sodium from the hot area to the cold area through the intermediate exchangers and the other in the cold area; providing outlet windows of the intermediate exchangers below the lower wall; providing outlet windows of the removal exchangers of the decay heat above the cold area, wherein all of clearances between the walls with cuts and the heat removal exchangers and the height between the two walls with cuts are previously determined so as to, during normal operation, take up differential movements between the walls, exchangers and vessel and to make it possible to establish during normal operation a thermal stratification of the primary sodium in the space defined between the horizontal portions of the two walls and so as to reduce, in case of an unexpected stop of a single pumping group, the mechanical stress applied to the walls and due to the portion of the primary sodium flow passing between said clearances.

The invention discloses an air conditioner, and a control method and device thereof. The air conditioner includes an indoor machine. The indoor machine includes a machine shell. The machine shell is provided with an upper air outlet and a lower air outlet that are mutually independent; the upper air outlet is correspondingly provided with a first draught fan and an upper air inlet; and the lower air outlet is correspondingly provided with a second draught fan and a lower air inlet. The control method comprises the following steps: when the air conditioner turns on a heating mode for operation,the first draught fan and the second draught fan are controlled to synchronously start; the temperature of the upper air inlet and the temperature of the lower air inlet are obtained, and a temperature difference value is obtained according to the temperature of the upper air inlet and the temperature of the lower air inlet; and when the time of the operation of the heating mode turned on by theair conditioner reaches first preset time, revolving speeds of the first draught fan and the second draught fan are separately adjusted according to the temperature difference value, so that an indoorvertical temperature difference is lowered. Therefore, the temperature difference between an indoor higher plane and an indoor lower plane can be effectively reduced to alleviate the phenomenon of indoor thermal stratification, thereby improving indoor thermal comfort.

The invention discloses a halogen-free phosphate-free high-heat-resistance thermosetting resin composition as well as a bonding sheet and a copper clad laminate prepared from the thermosetting resin composition. The halogen-free phosphate-free high-heat-resistance thermosetting resin composition comprises the following components: an aromatic amine compound, a bismaleimide compound, biphenyl epoxy resin, an amine curing agent, a catalyst, a flexible component composed of spherical particles with a core-shell structure, a filler and a solvent; the bonding sheet comprises a base material and the halogen-free phosphate-free high-heat-resistance thermosetting resin composition attached to the base material after impregnation drying; and the copper clad laminate comprises a plurality of overlaid bonding sheets and copper foils pressed and covered on one surface or two surfaces of the overlaid bonding sheets. The halogen-free phosphate-free high-heat-resistance thermosetting resin composition has the halogen-free, phosphate-free and environmentally-friendly characteristics and has the excellent characteristics of extremely high heat resistance, high glass-transition temperature, high thermal decomposition temperature, long thermal stratification time, good drilling machining property and the like; and the coefficient of thermal expansion of the halogen-free phosphate-free high-heat-resistance thermosetting resin composition can be lowered to be below 2.0% so as to satisfy the manufacture requirement of high multiples of layer (more than 20 layers) of PCB (Printed Circuit Board).

A method and apparatus for a thermal stratification test providing cyclical and steady-state stratified environments. In order to test an electronic device, for example one having one or more levels of ball-grid-array interconnections, e.g., connecting a chip to a flip-chip substrate and connecting the flip-chip substrate to a printed circuit board of a device, an apparatus and method are provided to heat one side of the device while cooling the second side. In some embodiments, the process is then reversed to cool the first side and heat the second. Some embodiments repeat the cycle of heat-cool-heat-cool several times, and then perform functional tests of the electronic circuitry. In some embodiments, the functional tests are performed in one or more thermal-stratification configurations after cycling at more extreme thermal stratification setups. In some embodiments, a test that emphasizes solder creep is employed.

The invention discloses a low-temperature propelling system based on a steam cooling screen. The low-temperature propelling system comprises a first storage box and a second storage box. A first isolating valve is arranged at an outlet of the first storage box, and a second isolating valve is arranged at an outlet of the second storage box. The first storage box is provided with a propellant managing device, a storage box shell, the steam cooling screen and a multi-layer thermal insulation material. The first storage box sequentially comprises the storage box shell, the steam cooling screen and the multi-layer thermal insulation material from interior to exterior. The propellant managing device is arranged in the first storage box. The storage box shell and the steam cooling screen are connected through a low-temperature thermal insulation support. The problem that the on-orbit working time of a low-temperature propelling system is short is solved. Propellant steam in the steam coolingscreen is utilized as a fuel cell working medium, an internal combustion engine is utilized to drive an electric generator, and electricity utilization demands of working of the propelling system arerelieved. In addition, evaporation and discharging of propellants in the storage boxes are reduced through the low-temperature propelling system, thermal stratification of the propellants in the storage boxes is reduced, and the on-orbit working time of the propelling system is prolonged.

The invention discloses a surge wave pipe structure of a nuclear power station voltage stabilizer. The surge wave pipe structure is used for releasing and eliminating thermal stratification. The urge wave pipe structure comprises a surge wave pipe for connecting a voltage stabilizer and a main pipeline and is characterized in that a rotational flow mixing groove is adopted at the connection section of the surge wave pipe and the main pipeline; and the rotational flow mixing groove is connected with a light tube section in mode of welding. With the adoption of the surge wave pipe structure, the damage caused by the thermal stratification phenomenon due to the reactor coolant inside the surge wave pipe structure of the nuclear power station voltage stabilizer is reduced, so that the security of a nuclear power station is improved; and the surge wave pipe structure is applicable to the transformation of a surge wave pipe of a voltage stabilizer in the existing arrangement mode, or used in voltage stabilizer surge wave pipe in new arrangement mode.

A device for reclaiming heated air near the ceiling of a room by circulating it to the lower portions of a room which reduces thermal stratification and distributes warm room air, which, improves comfort and heating efficiency, and in cooling mode, can be turned 180 degrees in the vertical plane to move cool air from the floor to the ceiling. Suspended from the ceiling by a small hook, the lightweight double walled fabric structure provides insulation against heat loss of the moving air, and contains a quiet and efficient fan at the bottom of the inner tube assembly which directs airflow into the room through a deflector crafted from a folded fabric sheet. The inner tube is held open against the negative pressure generated by suction of the fan by external springs attached to the outer wall of the inner tube, each spring fashioned from two struts connected by a short segment of elastic polymer.

A tube picking mechanism is designed for use in an automated, ultra-low temperature (e.g. −80° C. or −135° C.) or cryogenic (e.g., about −140° C. to −196° C.) storage and retrieval system that stores biological or chemical samples. The samples are contained in storage tubes held in SBS footprint storage racks that are normally stored within an ultra-low temperature or cryogenic freezer compartment. The tube picking mechanism includes a tube picking chamber that is maintained at about −80° C., about −135° C. or at cryogenic temperatures in cryogenic applications. Active electrical and mechanical components are maintained in a compartment above and separate from the refrigerated, ultra-low temperature or cryogenic compartment. Thermal stratification inhibits heat transfer into the lower, ultra-low temperature or cryogenic compartment in which tube picking occurs from the upper compartment in which active electrical and mechanical components are located, and also inhibits heat transfer into the lower, ultra-low temperature or cryogenic compartment via an access door for tube storage racks.

A water pipe structure of a branch pipe line (12) connected to a main pipe (22) for flowing water therethrough, wherein a cavity flow suppressing structure (30) is installed between the main pipe (22) and the branch pipe line (12) or in the branch pipe line to suppress a cavity flow produced in the closed branch pipeline, whereby the adverse effect of a thermal stratification formed by the cavity flow on the pipe can be eliminated.

The invention provides a low-temperature liquid storage evaporation control system adapted to lunar surface and a control method. The low-temperature liquid storage evaporation control system adaptedto lunar surface comprises a low-temperature liquid storage and heat leakage prevention module, a pump driven spraying and mixing module, a cold energy supply module, and a measurement collection control module, wherein the low-temperature liquid storage and heat leakage prevention module is used for storing low-temperature liquid and reducing heat leakage from the outside world to a low-temperature storage tank; the pump driven spraying and mixing module is used for mixing of low-temperature liquid in the low-temperature storage tank, eliminating thermal stratification, condensing the gas ofa gas pillow and controlling the pressure of the storage tank; the cold energy supply module comprises a low-temperature refrigerating unit, a refrigerating circuit A, a refrigerating circuit B, a pumping heat exchanger and a cooling screen heat exchanger; the low-temperature refrigerating unit is used for generating cold energy and transmitting the cold energy to a cooling screen circuit of the pumping fluid and low-temperature liquid storage and heat leakage prevention module; and the measurement collection control module is used for measurement of various parameters, collection of the sensor data and the control of the system. The low-temperature liquid storage evaporation control system adapted to lunar surface realizes the zero-evaporation storage of the low-temperature liquid on thelunar surface in the low-temperature storage tank by combining the environmental characteristics of the lunar surface and adopting a passive evaporation control and active evaporation control combination method.

The invention discloses a novel deepwater lake water restoring method through bubble plume dispersion oxygenation. In a water stratification period, a plume oxygenation jetting device is arranged at the bottom of a lake, an air source of the plume oxygenation jetting device is pure oxygen, bubbles jetted from the plume oxygenation jetting device and introduced water form air-water mixture, then the air-water mixture ascends to the maximum altitude before thermal stratification while the bubbles are continuously dissolved and disappear, sinking plume is formed due to density difference, oxygen-rich water diffuses all around and enters a distant water environment after the plume sinks to the balance depth, the hypolimnion is directly oxygenated, and the ascending velocity of the air-water mixture is 0.12-0.17m / s. The novel deepwater lake water restoring method through the bubble plume dispersion oxygenation is strong in pertinence; ascending bubbles are rapidly dissolved, the oxygen transfer efficiency is high, the oxygenation effect is good, and the operation difficulty and construction difficulty are greatly simplified; and the novel deepwater lake water restoring method through the bubble plume dispersion oxygenation has the characteristics of no disturbance on the thermal stratification, no damage of a lakebed cold water fish growth environment, high feasibility, low implementation risk and good water restoring effect.

A low temperature zone forming system by convection type thermal stratification in which the low temperature zone separated from polluted outside air is formed on a movable or fixed table for handling commodities such as marine products while maintaining freshness thereof during the period from carrying-in in the whole sale market, during selling by auction, until shipment of the commodities from the market, comprising an upward-open case body (30) mounted on a chassis (30a), a separate brine chilling unit (30b), and a brine piping (30c), the upward-open case body (30) further comprising a roller conveyer (35) installed in the center part of the floor of the case body (30), cooling flat plates each of which is installed adjacent to the roller conveyer (35), and cooling flat plates are installed on the inside faces of both laterally longitudinal side walls.

The invention discloses an air conditioner and a control method and device thereof. The air conditioner comprises an indoor unit. The indoor unit comprises a case, a plurality of swing blade sets anda plurality of driving assemblies, and the swing blade sets are sequentially arranged in the up-down direction. Each swing blade set comprises a plurality of air outlet swing blades arranged at intervals in the up-down direction. The multiple driving assemblies are matched with the multiple swing blade sets in a one-to-one corresponding mode. Each driving assembly is used for driving the multipleair outlet swing blades in the corresponding swing blade set to rotate. The method includes the following steps that when the air conditioner is started to operate in a heating mode, the multiple driving assemblies are controlled to drive the air outlet swing blades of the swing blade sets to keep the consistent angle, and timekeeping is started; whether timekeeping time reaches first preset timeor not is judged; and if yes, the angles of the air outlet swing blades of the upper and lower swing blade sets in the multiple swing blade sets are adjusted by controlling the multiple driving assemblies, so that the indoor vertical temperature difference is reduced. The phenomenon of indoor thermal stratification occurring when the air conditioner operates in the heating mode is effectively alleviated, and thus the indoor thermal comfort level is improved.

The invention discloses a containment vessel thermotechnical hydraulic comprehensive test device, which comprises a containment vessel simulation body, a gas supply system, a passive heat conduction system and a data system. The gas supply system is provided with a plurality of discharge ports, and the discharge ports are respectively arranged at different positions in the containment vessel simulation body and are used for releasing gas with different parameters to simulate gas release in the containment under different accident conditions; the data system comprises a plurality of data acquisition units and a data receiving unit, and the data acquisition units are distributed at different positions in the containment simulation body and used for acquiring thermal mechanical parameters atdifferent positions in the containment simulation body; the data receiving unit is electrically connected with the data acquisition units and is used for receiving the thermal mechanical parameters transmitted by the data acquisition units. According to the device disclosed in the invention, simulation test research on complex thermal-hydraulic phenomena such as thermal stratification, multi-gas components and distribution in the containment vessel and coupling behaviors of the containment vessel and a safety system can be realized.

The present invention relates to a method of confining pollution generated in the top volume and / or in the bottom volume of an enclosure filled with a fluid, i.e. either a gas, which is in general air, or a liquid, which is in general water, the method confining the pollution by thermal stratification. In said method the mean temperature of said top volume is maintained higher than the mean temperature of said bottom volume by an amount that is sufficient to ensure that said two volumes are separated by a turbulent intermediate zone of narrow width, referred to as the "mixing zone", within which a steep temperature gradient is maintained; said intermediate zone constituting a virtual confinement barrier in a horizontal plane. The present invention also relates to apparatus associated with the method.

The invention discloses a pipeline capable of reducing the influence of thermal stratification, and belongs to the technical field of mechanical equipment and nuclear safety. The pipeline comprises a cold section flowing through a low temperature fluid and a hot section flowing through a high temperature fluid. The cold and hot fluids are mixed in the pipeline. The pipeline is characterized in that a bump is arranged on the inner wall of the pipeline, and the cold and hot sections of the pipeline are respectively connected with a hot pipe, so that heat is transferred to the cold section from the hot section of the pipeline. The pipeline provided by the invention can be used to replace pipelines which are easily subjected to thermal stratification in a nuclear power station, so that the influence of thermal stratification can be effectively alleviated, and the safety of the nuclear power station is protected.

The invention provides a water cup realizing the outlet water temperature adjusting function. The water cup comprises a shell, a liner and a cup cover, wherein a straw communicating the inside and the outside of the water cup is arranged on the cup cover, a convection-resisting interlayer is arranged in the liner, and the convection-resisting interlayer separates the inside space of the liner into a plurality vertical and narrow small chambers. With the water cup provided by the invention, water in the cup can be subjected to thermal stratification rapidly, and water with different temperatures can be sucked out.

A pre-assembled, pre-tested quench path outlet assembly for providing a cryogen egress path from a cryogen vessel. A quench valve (26) is mounted within a flange (28). A cryogen egress tube (32) is sealed in leak-tight manner to the flange, to define a cryogen egress path (40) extending through the cryogen egress tube, the flange and the quench valve. The cryogen egress path is closed by a burst disc (34). In use, the pre-assembled, pre-tested quench path outlet assembly is mounted onto the cryogen vessel such that thermal stratification of gas within the cryogen vessel under normal conditions causes a lower end of the cryogen egress tube to be at a temperature below the freezing points of common air components.

The present invention relates to a greenhouse screen or the like which is intended for substantially horizontal application and for thermal stratification of the air space under a greenhouse roof, and which prevents drop formation from condensation. The invention also relates to a method for making this screen. The screen comprises webs of sheeting which are joined together edge to edge (or overlapping) by sewn-in threads in longitudinal and transverse directions which constitute a network on at least one side of the sheeting.

The invention relates to a heat accumulation water tank with a new structure. Based on a traditional heat accumulation water tank, a plurality of separator plates are arranged in the water tank in the gravity direction for dividing the heat accumulation water tank into a plurality of layers. A plurality of holes are formed in each of the separator plates. Aligned to the holes, straight pipes are connected with the upper parts or the lower parts of the separator plates; and the pipe diameters are equal to the hole diameters. The pipes positioned at the upper parts of the separator plates form a hot fluid channel; and the pipes positioned at the lower parts of the separator plates form a cold fluid channel. The structures of separator plates and the cold and hot fluid channels reduce the natural convection in the water tank, and the structures prevent the mixing of cold and hot fluids in the water tank. Compared with the traditional heat accumulation water tank, the heat accumulation water tank with the new structure can reduce the heat dissipating capacity of the heat accumulation water tank and largely increase the thermal stratification degree of the water tank so as to improve the heat accumulation efficiency of the water tank and the system efficiency of a solar water heating system.

The invention discloses a chilled water storage device comprising a chill storage water inlet / chill discharge water outlet, a guiding slide bar, a separating plate, a chill storage container, and chill storage water outlet / chill discharge water inlet. The chill storage container is an closed structure, the guiding slide bar is fixed in the chill storage container, the separating plate sleeves on the guiding slide bar and can slide along the guiding slide bar to separate the chill storage container into two totally isolated portions which are a chilled water storage portion and a warm water storage portion, the wall, at the cool water side, of the container is provided with the chill storage water inlet / chill discharge water outlet, and the wall, at the warm water side, of the container is provided with the chill storage water outlet / chill discharge water inlet. When chill is stored / discharged, the separating plate slides along the slide bar under the function of pressure difference of a circulating water pump, thermal stratification occurs in a common chilled water storage device can be eliminated, chilled water storage devices can be used in parallel in conditions with different capacities because of the closed structure, and the chilled water storage device also can be made into different shapes and sizes to be freely assembled on site, so the chilled water storage device is high in space utilization rate, good in place adaptability and capacity adaptability and high in storage and chilling efficiency.

The invention belongs to the technical field of copper-clad plate preparation and in particular relates to a method for preparing a high Tg copper-clad plate. According to the method, by virtue of combination of raw materials of different molecular weights, the wettability of glass cloth can be improved, the Tg value can be further increased as special rigid molecule segments are introduced, the purpose of improving properties can be achieved together with other auxiliary materials and solvents, the Tg value of the copper-clad plate can be up to 210 degrees or greater, and the thermal stratification time T300 DEG C / minute is greater than 30; by increasing the Tg value of the copper-clad plate, the thermal resistance, the wet resistance, the chemical resistance and the stability of a circuit board can be improved, the problem that a circuit board is broken in the lead-free hot air solder level process of a circuit can be solved, and meanwhile, the circuit board manufacturing efficiencycan be also improved.

The invention discloses a vertical-type heat-storage water tank having a built-in coil pipe with a thermal stratification function. The vertical-type heat-storage water tank comprises a heat-storage water tank housing. An inner cavity of the heat-storage water tank is arranged in the heat-storage water tank housing. The inner cavity of the heat-storage water tank comprises a high-temperature-areacavity, a skew-temperature-area cavity and a low-temperature-area cavity, all of which are orderly distributed from the top to the bottom and communicate with each other. The transverse middle position of the inner cavity of the heat-storage water tank is equipped with a heat-exchange coil pipe which are vertically distributed from the top to the bottom. At least one cylindrical stratified sleevecovers outside the heat-exchange coil pipe. Flow-diverting holes are arranged in the stratified sleeve. Center positions of the top and the bottom of the heat-storage water tank housing are respectively equipped with a second external heat source inlet and a second external heat source outlet. The vertical-type heat-storage water tank having the built-in coil pipe is endowed with the thermal stratification function. According to the need of a user, high-temperature water and low-temperature water can be reliably provided, which is conducive to increasing utilization rate of solar energy and low-taste energy.