Heat recovery unit
SUBSTANCE: invention is aimed at heat exchanging and can be used in energy sector. A heat recovery unit comprises a casing divided by a leakproof baffle into the cells for the cold and hot media, and a heat tube bundle passing through the cells and fixed in the baffle. The cold medium cell is divided into two chambers by a wall being perpendicular to the baffle between the cold and hot media cells, namely into the cold medium preheating chamber and final heating chamber. The former chamber is filled by heat tubes along its total height and the latter chamber is made with a tank which is free from the heat tubes and made in the chamber upper part. The chambers are interconnected by a pipeline. Heat tubes in the hot medium cell or in the cold medium cell or in both cells can be ribbed.
EFFECT: expanded applicability and high economic parametres of the performance along with high heat engineering efficiency and reliability.
4 cl, 1 dwg
The invention relates to the sector of energy and can be used in the development of waste heat exchangers to produce steam or hot water using heat flow vibronic gas emissions from different fuels and EnergoPolyus equipment.
Known fire-tube boiler (see the book Kovalev A.P., Lelei NS, Panasenko PPM and other Steam generators. - M.-L.: Energy, 1965, S. 23) is composed of a casing filled with water, and the pipe (or two tubes) of large diameter in it, which is called the flame. In this boiler, which can operate in heating mode water or generate steam, combustion products are consistently one or one and then the other pipe (if there are two fire tubes of the boiler is called East Lancashire) or divided into two parallel streams. The main disadvantage of this boiler is its low production, which depends on the area of heating surface, which is relatively small.
More productive is another type of boiler, which is called smoke or combined (locomobile) (see the book Lichtman M., Hrapovic LO Equipment and operation of boilers.- Kyiv: Tekhnika, 1997, p.46, 53), which is composed of shorter heating pipe connected to the beam tube of small diameter pipes. Cycling is such boilers is increased in comparison with the fire due to the development of surface through which the heat exchange, and this is the total area of the inner surface of the pipe, which is in direct contact with the hot medium is heated and transfers heat through the walls of the pipes on their outer surface.
This analogue also has significant drawbacks. In accordance with Newton's law of Ramana passed from combustion products heat flux Q is directly proportional to the heat transfer coefficient α, the square F pressure and temperature Δt or the difference flue gas temperatures tbecame popularand the pipe wall on the inner surface of the pipe tSTT, that is, Q=α·F·Δt.
The heat transfer coefficient from the gas medium has a relatively small magnitude (of the order of several tens of W/m2·) In comparison with the magnitude of the coefficients of heat transfer from the outer surface of the flue pipe to the water (of the order of several thousand W/m2·To). The coefficient α has a low value because in this type of boiler is relatively ineffective method of heat transfer, namely in terms of the longitudinal flow smooth internal surfaces of pipes. Thus, critical (which determines the efficiency of heat transfer) is the efficiency of heat transfer from the gas medium to the inner surface of the flue pipe. The possibility of increasing this efficiency is productivity (at constant values of α and Δt is the increase in the area of the inner surface of the flue pipe. This can be done in two ways. The first is to increase the number of fire tubes. The possibilities in this direction is limited due to technological difficulties create a tight beam with a large number of small diameter pipes. Another approach consists in the development of the inner surface of the flue pipe by equipping it with additional surface, for example, in the form of longitudinal ribs. However, this is inefficient, technologically complex and expensive way, which is almost never used in practice. Manufacturing technology tube boiler quite complex, which is determined primarily by the complexity of creating collector smoke tube bundle in the end surface of the flame tube, which is made by welding. The distance between adjacent tubes in the tube bundle are determined by the technological possibilities and are significant, and accordingly, the dimensions of the boiler will be significant. In addition, the repair of such boiler if cracks or pores in the welds laborious.
As a prototype of the selected closest in technical essence to the heat exchanger-the heat exchanger (see USSR author's certificate No. 1179086, IPC F28D 15/00, 15/02, publ. 1985), comprising a housing separated by a sealed partition into compartments for hot and cold environments, and a bundle of heat pipes running across the compartments and secured in the partition.
In this technical solution, the efficiency and the reliability is improved in comparison with similar due to the use of heat pipes that are installed so that their evaporative plots are located in the compartment for hot environment, for example vibronic flue gases and the condensation is installed in the compartment for cold environment, for example water. Reusable increase the surface heat transfer is achieved that the gas flow submerged evaporator sections of the bundle of heat pipes that, as a rule, are equipped with ribs. The temperature across the surface evaporation is approximately the same. The same applies to the surface of the heat transfer in the cold environment. In the prototype uses a more efficient method of heat transfer, namely in terms of transverse wash external surfaces of the heat pipes. Reliability is ensured by the fact that the heat pipe is fixed and sealed in the wall. It is known in the energy sector and a well developed seal in the tube plate. When the failure of one or more heat pipes does not change significantly the heat transfer ability of the heat-exchanger. This also is not violated density between compartments because even in the unlikely event of depressurization of the heat pipe from a hot or cold medium density remains its obolos and from another environment. That is, the failure of one or even several heat pipes, which is unlikely, cannot be the cause of the loss density and subsequent mixing of hot and cold environments. Heat pipes can be replaced if necessary. Heat pipes efficiently transmit the heat flow into the Bay with a cold environment. The prototype also has relatively small dimensions and weight, which ranges from 1/3 to 1/5 of the size and weight of the flue boilers (see, for example, the book Vasiliev L.L., Kiselev VG, Matveev, Y., Molodkin PF heat Exchangers-heat recovery steam generators for heat pipes. - Minsk: Science and technology, 1987, p.85).
The disadvantages of the prototype is that this recovery will receive only one hot environment, namely in the form of a liquid (usually it's water). This reduces the economic performance of the heat exchanger, because to get hot environment in the form of steam need to have another heat exchanger, and therefore, it is necessary to spend money on its purchase. If you get hot environment of the two species in this recovery, it will work poorly because vapour and its accumulation in the upper part of the compartment to the cold environment of the sites condensation heat pipes, which will be in this part will not work on the generation of a pair, respectively, and eff is aktivnosti exchanger will be reduced. Discharge of produced steam will also be complicated by the presence in the vapour space of the bundle of heat pipes. The existing temperature and pressure in such a heat exchanger-the heat exchanger during operation of the steam generation will be used inefficiently due to lack economizer part and, accordingly, the preheating of feed water from its lowest temperature at the entrance. In addition, in the compartment to the cold environment in this mode of operation will take place conditions underheating and boiling may be unstable as the heating water up to the saturation temperature. This is totally unacceptable for the steam generator, which should be stable. When the heat-exchanger in the receive mode of the heated medium in liquid form no economizer part also leads to inefficient use of the available temperature driving force.
The basis of the invention lies in the task of creating a heat exchanger, in which the new structure of the compartment for cold environment would allow for the extension directions of use and high economic performance heat exchanger with high thermal efficiency and reliability.
The problem is solved in that in a heat exchanger, comprising a housing, a divided hermit who offered the partition into compartments for hot and cold environments and a bundle of heat pipes passing through the compartments and secured in the wall according to the invention compartment for cold environment is divided into two chambers by a wall perpendicular to the wall, namely the camera preheating and final heating of the cold environment, and the first of them are filled along the entire height of the heat pipes and the second made with the formation in the upper part of this chamber capacity, free from heat pipes, while the cameras are connected by pipeline. Heat pipes in the compartment for hot environment, or in the compartment for cold environment, or in both compartments can be equipped with ribs.
Performing a case split sealed by a partition into compartments for hot and cold environments with a bundle of heat pipes that pass through the compartments and fixed in the wall, with compartment for cold environment is divided into two chambers by a wall perpendicular to the wall, namely the camera preheating and final heating of the cold environment, and the first of them are filled along the entire height of the heat pipes and the second made with the formation in the upper part of this chamber capacity, free from heat pipes, and these chambers are connected by piping, and heat pipes can be equipped with ribs in the compartment for hot environments or compartment for cold environment, or in both compartments is, allows you to expand the areas of use of the heat exchanger by providing a hot environment in the form of steam and hot environment in the form of liquid. The economic performance of this heat exchanger will be high due to the extension directions of its use, i.e. the heat exchanger allows you to save money on the purchase of two heat exchange devices for two hot environments. The proposed heat exchanger will be equally efficient to work at getting either hot environments, so as to obtain, it is reasonable to use all available temperature and pressure. High efficiency heat exchanger is ensured by the fact that the available disposable temperature and pressure used better and more profitable way. For example, during operation of the heat exchanger is in the receive mode pair is as follows. Wybranie gases are directed to the heat exchanger into the hot medium from the side opposite to the location of the camera pre-heating the compartment to the cold environment. That is, the flow vibronic gases supplied to the evaporating sections of the heat pipe, the condensation sections are placed in the chamber pre-heating already substantially cooled, partially utraty is their potential in the chamber of the final heating of the cold environment. Here he gives the rest of their capacity, which is used for preheating the cold environment in the form of water to a temperature slightly below the saturation temperature, that is, brings a cold environment to a state close to boiling. Next, the flow of exhaust gases enters the chimney and emitted into the environment. Getting into the final camera-heating the pre-heated almost to the saturation temperature cold environment immediately starts to boil using high initial heat capacity of the hot medium, forming a vapour phase. That is, there is the rational use of temperature and pressure. If the heat exchanger was not camera preheating, then when you hit a cold environment into a cold medium boiling could begin only after warming up a cold medium to saturation temperature and would not be stable, and would be carried out periodically, that is, the heat exchanger would work in pulse mode, which is unacceptable. During operation of the heat exchanger is in the receive mode heated cold environment in the form of a liquid pre-heated in the chamber pre-heating contributes to the stable operation of malotilate with the rational use of disposable temperature and pressure.
The proposed heat exchanger saves you okay reliability due to the use of this technical solution is well spent sealing the tube bundle in the tube plate and heat pipes in each double insulating barrier between environments, the heat transfer between which they conduct. Education is free from the heat pipes to the tank in the upper part of the chamber the final heating of the cold environment creates favorable conditions for heat pipes in the receive mode the heated environment in the form of steam. The resulting vapor is accumulated in this capacity, and the entire length of the plots condensation is in a cold environment in the form of a boiling liquid, which does not allow them to overheat, and can run at an optimal temperature.
Technical essence and principle of the proposed heat exchanger is explained by the drawing.
The drawing shows a heat exchanger in the cut. The heat exchanger includes a housing 1 with a sealed partition 2 therein. This partition 2 divides the housing 1 Bay 3 hot and cold 4 environments. Through both sections 3 and 4 passes a beam of heat pipes 5, which are fixed in a sealed partition wall 2. Wall 6 divides the compartment for cold environment 4 camera preheating of this medium 7 and the camera its final heat 8, which are interconnected by the pipe 9. In the chamber 8 is formed free from of heat pipes 5 capacity 10. Compartment 3 is equipped with an input 11 and output 12 pipes. The chamber 7 has an inlet pipe 13, and the camera 8 to the outlet 14.
The heat exchanger operates as follows. The heat exchanger can operate on the uh modes.
1. The mode of receiving the heated environment in the form of liquid. The cold environment, which must be heated, for example water, is fed into a cold medium 4 through the inlet 13. Hot environment, for example wybranie flue gases through the inlet 11 is fed into the hot medium 3, which heats the evaporator sections of the heat pipes 5 and exits through the outlet 12. The coolant heat pipes 5 boils and evaporates and migrates in the form of steam due to the latent heat of vaporization the heat flow into the cold environment 4. In the compartment 4, the coolant heat pipes 5 is condensed on their condensing sections are cooled cold environment, which in this heat. With the cold environment fills the chamber 7, the pre-heated in this chamber, after which the pipe 9 is fed into the chamber of the final heating of the cold environment 8 to complete its completion (including capacity 10), where the final degraves and sent to the consumer through the outlet 14. The condensed coolant heat pipes 5 is returned in liquid form to the evaporator sections of these heat pipes into a hot environment 3.
2. The mode of receiving the heated environment in the form of steam. The cold environment in liquid form, which must be converted into steam, for example water, is fed into a cold medium 4 is input via the pipe 13. Hot environment, for example wybranie flue gases through the inlet 11 is fed into the hot medium 3, which heats the evaporator sections of the heat pipes 5 and exits through the outlet 12. The coolant heat pipes 5 boils and evaporates and migrates in the form of steam due to the latent heat of vaporization the heat flow into the cold environment 4. In the compartment 4, the coolant heat pipes 5 is condensed on their condensing sections, cooled cold environment, which in this heat. The cold environment in the form of liquid completely fills the chamber 7 and pre-heated in this chamber, which acts as a water economizer, and then in the form of subcooled prior to the saturation temperature of the liquid goes through the pipe 9 into the chamber of the final heating of the cold environment 8, where doreverse to saturation temperature and turns into a vapor that accumulates in the free from of heat pipes of the tank 10. The process of obtaining the pair should be conducted so that the cold environment in the chamber of the final heating fully covers the condensing sections of the heat pipes, creating a boundary surface between the boiling liquid and vapour. After this steam is sent to the consumer through the outlet 14. The condensed coolant heat pipes 5 is returned in the form of liquid and Priceline plots of these heat pipes into a hot environment 3.
The heat exchanger is equipped with all necessary equipment, namely, sight column, water gauge glass, safety valve, automatic control systems and security and others, and when operating in different modes, use the relevant part of that equipment.
Manufactured and tested an experimental model of a heat exchanger, having in its composition body, which was divided sealed by a partition into compartments for hot and cold environments. Through a tight partition passes the beam of heat pipes, evaporative areas are placed in the compartment for hot environment, and condensation - in compartment for cold environment. Heat pipes were fitted with ribs in the compartment for hot environment. Compartment for cold environment is divided into two chambers by a wall perpendicular to the partition, the first of which side of the input pipe to the cold environment is completely filled by the height of the heat pipes, was performing a camera function preheating (economizer) and in which there were lots of condensation of the latter (along the gas) number of heat pipes, and the second, where there was lots of condensation of the remaining rows of heat pipes, was performing a camera function of the final heating of the cold environment, namely degreane to saturation temperature and evaporation. Both cameras would be and are interconnected by pipes. The heat exchanger was tested in the mode of the water heater (mode 1), and in the mode of the steam generator (mode 2). As a hot medium was used flow vibronic natural gas combustion products from the process furnace.
In the tests were obtained such characteristics exchanger operating in nominal mode of operation of the furnace.
|1. The flow of products of combustion, nm3/s||0,86|
|2. Flue gas temperature at inlet,°C||270|
|3. The temperature of the combustion products at the exit,°C||130|
|4. Aerodynamic drag, PA||220|
|5. Recycled heat flux, kW||170|
|6. Heating capacity (water heater), kW||170|
|7. The steam (steam generator), kg/s||0,07|
|8. Working pressure water (steam), MPa, not more than||0,07|
|9. Dimensions taloudelliset the RA, mm|
|10. Weight, kg||590|
|11. Energy-saving effect|
|11.1. Savings of natural gas due to the heat utilization|
|wybranego the flow of gases, m3per hour||19|
|11.2. Increasing the utilization rate of fuel to the furnace, %||25|
The experimental sample of the heat exchanger is stable and operates reliably from the time of its launch (December 2005).
1. Heat exchanger, comprising a housing separated by a sealed partition into compartments for hot and cold environments, and a bundle of heat pipes passing through the compartments and secured in the partition, wherein the compartment for cold environment is divided into two chambers by a wall perpendicular to the wall, namely the camera preheating and final heating of the cold environment, and the first of them are filled along the entire height of the heat pipes and the second made with the formation in the upper part of this chamber capacity free from of heat pipes, and the camera are connected by pipeline.
2. The heat exchanger according to claim 1, characterized in that the heat pipes are equipped with ribs in the compartment for hot environment.
3. The heat exchanger according to claim 1, characterized in that the heat pipes are equipped with ribs in the compartment to the cold environment.
4. The heat exchanger according to claim 1, characterized in that the heat pipes are equipped with ribs in the compartments for hot and cold environments.
FIELD: heating systems.
SUBSTANCE: invention is designed for heat transfer and can be used for ensuring operation of mechanical devices submerged into liquid medium. Thermal siphon contains housing, the working volume of lower chamber of which is filled with liquid, cone by means of which the lower chamber with steam line for transporting steam is partitioned, steam generator in lower chamber and condenser in upper chamber. Condenser is cooled surface of upper chamber of thermal siphon, some part of lower chamber is intended for air accumulation and other gaseous impurities originally contained in thermal siphon. Valve for releasing some air to the outside is installed in lower chamber.
EFFECT: invention allows improving heat transfer effectiveness in thermal siphon from heated part to cooled section by intensifying heat transfer during condensation in conditions of high air content of the system.
FIELD: heating systems.
SUBSTANCE: this heat pipe is intended mainly for freezing of soil. Pipe includes tight housing filled up with heat carrier and having evaporation and condensation zones, and transport zone, as well as thermoelectric elements, cold surfaces of which have thermal contact to external surface of housing wall in condensation zone, and hot surfaces - to heaters. Peculiar feature of pipe is that housing is provided with external surface of wall having rectangular shape (60) in cross section in condensation zone at the internal cross section in that zone, which does not change as to housing length. Thermoelectric converters (6) are installed on all four sides of external surface of housing wall, and heaters are made in the form of finned plates (8) so that they form cavity (9) enclosing the housing, and free internal volume of the above cavity is filled with low heat-conducting material with low saturation coefficient.
EFFECT: increasing heat transfer ability of heat pipe.
FIELD: heating systems.
SUBSTANCE: invention is meant for steam generation and can be used in steam boiler design. Steam boiler includes drum, furnace, steam collector, and superheater. Furnace longitudinal axis is offset downwards relative to longitudinal axis of cylindrical drum. Furnace is made in the form of hollow cylinder closed with covers on both sides, and in upper arch of which rectangular through channels are provided at some distance from each other in longitudinal and cross directions. In the above channels there inserted are heat transfer devices installed so that longitudinal axis of each of them is located in radius line of furnace and passes through centre of circle of the latter. Heat transfer devices are made in the form of heat pipes, each of which has rectangular hollow duct whereto covers are welded from above and from bellow, and inside each heat tube there is liquid filling up 1/4 of the volume, which has been supplied through the hole made in upper cover, which is closed with a plug. Lower parts of heat pipes, being heating and evaporation zones, protrude to furnace volume. Upper parts of heat pipes, being condensation zones, are located in the form of a fan in upper part of cylindrical drum and have cooling ribs.
EFFECT: invention provides more complete and faster use of generated heat, its supply to the whole volume of water and its uniform heating, increasing boiler capacity, life time.
FIELD: engine and pumps.
SUBSTANCE: heat-pipe jet engine relates to power engineering and can be used to recover secondary and natural thermal resources, particularly to convert thermal power into mechanical power. Proposed engine comprises housing coated with wick from inside and plugged by a bush, evaporator chamber in contact with hot medium, closure with inlet hole, condensation chamber incorporating rod with valve and staying in contact with cold medium. Portion of the housing outer surface is coated with bellows in the area of condensation chamber. Lower end face wall edges are jointed to the edge of inner board of circular reservoir with its outer board edge being rigidly jointed to the bellows lower edge. Reservoir outer board center is connected to working member. Spaces between bellows and housing, as well as condensation chamber vapor space are intercommunicated via branch pipes passing the openings of the bush, wick and housing.
EFFECT: higher efficiency and reliability.
SUBSTANCE: invention can be used in chemical, petrochemical and other branches of industries using the catalytic gas-phase processes. The reactor contains the casing 1, means of initial components input 2, means of end-product output 3, catalyst area 4, heat inlet and takeoff unit designed as array of heat pipes 6, passing through the catalyst area 4. The part of every heat pipe is separated from the rest of internal heat pipe volume with membrane designed of the gas conducting material. The heat pipe volume separated with membrane can be connected with vacuum pump.
EFFECT: invention allows prevention of hydrogen diffusion along the heat pipes and provides the effective heat transfer from heat pipes to catalyst.
12 cl, 2 dwg
SUBSTANCE: invention is designed for heat exchange and can be used in different industry branches. A heat exchanger comprises a lower casing part with the fittings for supplying and removing the heating medium and an upper casing part with the fittings for supplying and removing the medium being heated, upper and lower parts of the heat pipes fixed in the upper and lower pipe plates respectively with a common heat pipe chamber being formed between the plates. The heat exchanger is equipped with a pressure-and-vacuum gage and a gate set prior to it. The common heat pipe chamber is communicated to the gate connected to the vacuum air suction system. The heat pipes are of U-like shape.
EFFECT: control of pressure in the heat pipes, elimination of dryout in the evaporator and protection from the media mixing.
FIELD: aircraft industry.
SUBSTANCE: invention refers to creation and operation of elements of thermostatting systems, and namely telecommunication satellite instruments. Method involves determination of heat tube temperature differential values between evaporation and condensation sections thereof within the range of changing operating temperatures of those sections. At that, to evaporation section there supplied is one and the same required heat power for various amounts of excessive heat carrier wherewith the inner cavity of heat tube housing is filled. In that cavity there made is a wick in the form of longitudinal grooves on the housing inner surface. Temperature differential values between the above heat tube evaporation and condensation sections at maximum operating temperature of evaporation section and for the specified amounts of filled excessive heat carrier are determined at minimum allowable operating temperature of condensation section. At that, amounts of filled excessive heat carrier meet the certain condition expressing the dependence of those amounts on heat carrier densities at maximum and minimum allowable operating temperatures of evaporation and condensation sections.
EFFECT: reliable determination of temperature differentials at heat tube ground test between evaporation and condensation sections thereof, as well as maximum allowable amount of filled excessive heat carrier at which there provided are the above temperature differentials in all heat tube orbital operating conditions.
SUBSTANCE: invention may be used for utilisation and accumulation of heat of smoke fumes, compressed air of compressor plants or other highly potential sources of heat supply. Heat exchanger comprises body, in which coolant pipe is installed, and thermal ribbed tubes. One end of thermal tubes is installed inside coolant pipe as inclined to generatrices of cylindrical surface of coolant pipe along helical line, and the other one is installed in body. Ribs are arranged on that part of thermal tubes installed in body. Thermal ribbed tubes are vacuumised and filled with water portions.
EFFECT: increased efficiency of heat transfer and simplified design.
2 cl, 1 dwg
FIELD: technological processes; heating.
SUBSTANCE: utiliser of waste gases heat contains thermal pipes that are made with annular cross sections and through central channels, which are connected with gas supply nozzle. Evaporation sections of pipes are installed in flue duct, and condensation sections of pipes are installed in water supply system. Outlets of central channels of thermal pipes communicate with flue duct bottom part, with which multicyclone element inlets also communicate, which are equipped with vortex generators, and their outlets are connected to nozzles, which are installed in flue duct between thermal pipes, perforated partition that overlaps intertubular space sides with nozzle top ends, and its openings are coaxial to openings of nozzles, at that partition is installed in plane that is inclined at an angle to horizon to provide direction of flows of gas from nozzles purified in cyclone elements in direction to outlet nozzle of flue duct with approximately identical velocities.
EFFECT: efficient purification of gases from hard aerosol particles and avoidance of dust deposition in flue duct.
SUBSTANCE: invention pertains to electronics and specifically to heat transfer and can be used in aircraft-borne equipment for increasing efficiency of heat transfer and protection from electromagnetic interference. The radiator device is in contact with a heat-loaded element and has several lamellar thermal plates, each of which has a heat absorption part, in contact with the surface of the heat loaded element, and a heat releasing surface, which is a continuation of the heat absorption part. The thermal plates are arranged in piles, in which the heat absorption part of the plates forms the centre of the pile of the thermal plates. The device also has a pair of squeezing blocks between the heat absorption parts of the pile of thermal plates and squeezing the heat absorption part of the plates. The heat releasing part of the plates is such that, after forming the plates, a structure is formed, in which the heat releasing parts of the plate are parallel to each other, and the heat absorption parts form a closed space on all sides, in which the heat loaded element is put. The plates have a current conducting coating. The radiator device has a ventilator, fitted such that, air streams pass through parallel thermal plates. Besides that, the radiator device is in electrical contact with the contact area of a printed circuit board, forming a single earthing contour.
EFFECT: design of a highly efficient heat transfer radiator and protection from electromagnetic interferences.
3 cl, 4 dwg
FIELD: cooling equipment, particularly heat exchange apparatuses.
SUBSTANCE: device to remove heat from heat-generation component includes coolant stored in liquid coolant storage part, heat absorbing part including at least one the first microchannel and installed near heat-generation component. Heat absorbing part communicates with storage part. Liquid coolant partly fills microchannel due to surface tension force and evaporates into above microchannel with gaseous coolant generation during absorbing heat from heat generation component. Device has coolant condensing part including at least one the second microchannel connected to above coolant storage part separately from the first microchannel, gaseous coolant movement part located near heat-absorbing part and condensing part and used for gaseous coolant movement from the first microchannel to the second one. Device has case in which at least heat-absorbing part is placed and heat-insulation part adjoining heat absorbing part to prevent heat absorbed by above part from migration to another device parts.
EFFECT: reduced size, increased refrigeration capacity, prevention of gravity and equipment position influence on device operation.
22 cl, 4 dwg
FIELD: heat power engineering.
SUBSTANCE: heat pipe comprises vertical housing with evaporation and condensation zones and partially filled with heat-transfer agent and coaxial hollow insert in the evaporation zone which defines a ring space with the housing and is provided with outer fining. An additional hollow cylindrical insert of variable radius made of a non-heat-conducting material is interposed between the condensation zone and coaxial hollow insert. The outer side of the additional insert and inner side of the housing of the heat pipe define a closed space.
EFFECT: reduced metal consumption.
FIELD: heat power engineering.
SUBSTANCE: heat exchanger comprises housing separated into chambers of evaporation and condensation with a baffle provided with heat pipes which are arranged in both of the chambers. The zones of evaporation of the pipes are positioned inside the evaporation chamber, and zones of the condensation of the pipes are positioned inside the condensation chamber. The heat pipes inside the evaporation chamber are made of wound pipes of oval cross-section. The zones of condensation of heat pipes are also made of wound pipes of oval cross-section .
EFFECT: enhanced efficiency.
1 cl, 6 dwg
FIELD: heating engineering.
SUBSTANCE: heat pipe can be used for heat transmission and temperature control procedures. Heat pipe has evaporator provided with capillary-porous nozzle and capacitor. Evaporator and nozzle are connected by vapor line and condensate pipeline. Nozzle is made of electric-insulating material, for example, of ceramics. Grid-shaped electrode is mounted at the inner side of nozzle. The electrode is connected with rod electrode, which is mounted inside airtight isolator at edge part of evaporator.
EFFECT: improved heat power; prolonged length of heat pipe.
FIELD: heat-power engineering; utilization of low-potential heat, heat of soil inclusive.
SUBSTANCE: proposed thermosiphon includes heat pump with thermosiphon containing working medium capable of changing its liquid state to gaseous state and vice versa; it includes evaporation and condensation parts; thermosiphon is provided with hermetic thermal tube whose working medium is capable of changing its liquid state to gaseous state and vice versa; it also has evaporation and condensation parts; condensation part of thermal tube bounds cavity of heat pump evaporator together with outer housing, cover and lower platform; said cavity is provided with branch pipes for delivery of liquid phase of heat pump working medium and discharge of gaseous phase of heat pump working medium in such way that condensation part of thermal tube forms inner housing of heat pump evaporator; mounted in between of outer and inner housings of heat pump evaporator is intermediate housing which is provided with holes in lower part for passage of liquid or gaseous phase of heat pump working medium circulating inside its evaporator; tubes-nozzles mounted between inner and intermediate housings are directed vertically upward for admitting liquid phase of heat pump working medium under pressure; heat pump evaporator has inner surfaces. Besides that, outer, inner and intermediate housings of heat pump evaporator are taper in shape and are so located that have common vertical axis of symmetry; inner surfaces of heat pump evaporator and inner housing are finned.
EFFECT: considerable reduction of thermal head between soil and working medium in heat pump evaporator; reduced overall dimensions; possibility of utilization of energy of compressed liquid fed from heat pump condenser to evaporator.
3 cl, 2 dwg
FIELD: heat transfer equipment, particularly to carry heat for long distances, for instance refrigerators.
SUBSTANCE: heat-exchanging system comprises closed loop including main heat-exchanging channel, heat carrier agent pumping device, additional heat-exchanging channel and heat-carrier supply channel connecting the main and additional heat-exchanging channels. Heat carrier agent pumping device may withdraw heat carrier agent in vapor or vapor-and-liquid state from one heat-exchanging channel and supply above vapor or vapor-and-liquid heat carrier agent under elevated pressure into another heat-exchanging channel. Heat carrier agent supply channel is formed as channel with capillary partition closing the channel. During heat-exchanging system operation the capillary partition obstructs vapor penetration or vapor-and-liquid flow. The vapor penetration obstruction is defined by cooperation between meniscuses and inner surfaces of capillary channels formed in the partition. The vapor-and-liquid flow obstruction is defined by bubble meniscuses cooperation with inner surfaces of capillary channels of the partition. The heat carrier agent pumping device may withdraw vapor or vapor-and-liquid heat carrier agent from any heat-exchanging channel and pump above heat carrier agent under elevated pressure in another heat-exchanging channel.
EFFECT: increased efficiency of heat-exchanging system.
14 dwg, 18 cl
FIELD: applicable for heat abstraction in various media.
SUBSTANCE: the heat transferring device has a sealed pipe with condensation and evaporation zones filled up with a heat-transfer agent with pockets provided on the inner surface, the pockets used for inhibition of draining condensate are located in the evaporation zone and made annular or formed by the sections of the helical surface adjoining the pipe inner wall with its lower edge at an acute angle, which are separated from one another by radial partitions, the annular pocket is formed by the side surface of the truncated cone, adjoining the inner wall of the mentioned pipe with the larger base. Besides, at least some of the pockets located one above other are positioned at such a distance that a capillary effect occurs between the surfaces facing one the other.
EFFECT: enhanced efficiency of heat transfer due to the increase of the pipe surface wettable by the heat-transfer agent, as well as simplified structure an facilitated actuation of the device.
3 cl, 7 dwg
FIELD: chemical and oil industry.
SUBSTANCE: reactor comprises housing, means for supplying initial components and discharging finished product, unit for heating and cooling made of a number of heat pipes, additional catalyzer applied on the heat pipes and/or housing and made of a coating. The heat pipes are staggered in the space of the housing. The total area of the surface of the heat pipes in the catalytic zone should provide heating and cooling the catalytic zone.
EFFECT: enhanced efficiency.
5 cl, 1 dwg
FIELD: electric mechanical engineering, possible use for cooling electric generators and electric engines.
SUBSTANCE: in proposed system for cooling electric machines, containing compressed air source with force pipeline, splitting vortex pipe, having as a result of energy division to hollows - hot one and cold one, thermal pipe made inside the hollow shaft of electric machine, as a special feature, along axis of hollow shaft a tubular channel is made for passage of cold flow from splitting vortex pipe, and space, formed by external surface of tubular channel and internal surface of hollow shaft is thermal pipe, condensation area of which - external surface of tubular channel, and evaporation area - internal surface of hollow shaft.
EFFECT: efficient and even cooling of electric machine, simplified construction, increased manufacturability.
FIELD: control of temperature of spacecraft and their components.
SUBSTANCE: proposed method includes measurement of temperatures in spacecraft temperature control zones, comparison of these temperatures with high and low permissible magnitudes and delivery of heat to said zones at low limits. Heat is delivered by conversion of electrical energy into thermal energy. Power requirements are measured at different standard time intervals of spacecraft flight forecasting orientation of its solar batteries to Sun. Magnitude of electric power generated by solar batteries is determined by forecast results. Measured magnitudes of consumed electric power are compared with forecast data. According to results obtained in comparison, flight time is divided into sections at excess of energy generated by solar batteries over consumed power, equality of these magnitudes and shortage of generated energy. High magnitudes of temperature are maintained at excess energy sections by conversion of difference of generated energy and consumed energy into heat. In case of reduction of generated energy in the course of changing the orientation of solar batteries on Sun, temperature in these zones is reduced to low limits at simultaneous equality of energies. In case of further increase of generated energy, temperature in said zones is increased to high limits at equality of energies. Then, in the course of change of generated energy, temperature correction cycles in temperature control zones are repeated.
EFFECT: avoidance of excess of consumed energy above generated energy of solar batteries.