Heat exchanger

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

 

The invention relates to heat exchange devices designed for cooling of liquid media by atmospheric air, and can be used as a cooler waste water in power plants for various purposes.

A known heat exchanger (A.S. No. 1132114 A, class F 23 L 15/04, publ. 30.12.84 g)containing placed in the flue evaporation and condensation stages, separated by a horizontal partition mounted in her heat pipes passing through both cameras, and zone of evaporation and condensation heat pipes placed in the evaporation and condensation stages, respectively.

The closest solution to the technical nature of the invention is a heat exchanger (A.S. SU # 1257400 A1, class F 28 D 15/02, publ. 15.09.86,), comprising a housing divided by a partition into the heating chamber and heated environments in the camera view of evaporation and condensation, respectively, with a fixed therein by heat pipes placed in both chambers, and the evaporation zone of the pipe is placed in the evaporation chamber, the condensation zone of the heat pipe is placed in the chamber condensation.

A disadvantage of the known heat exchanger is reduced, the efficiency of heat exchange intensification in the evaporation zone through the use of straight pipes without intensification of heat transfer through the hydrodynamic impact on border is CNY layer. The use of straight pipes without intensification of heat transfer through the hydrodynamic effects on the boundary layer also leads to an increase in overall size of the heat exchanger and the increased non-uniformity of temperature distribution on the outer surface of the pipe due to the inability to create optimal conditions for the flow and mixing environment in the annular space by reducing the flow area at the convergence of the pipe evaporating section in the radial direction. The invention solves the problem of increasing intensification of heat transfer, reducing the overall size of the heat exchanger and uneven temperature distribution on the outer surface of the evaporating section of the pipe through the use of twisted heat pipes oval profile.

The problem is solved in that the heat exchanger for heat pipes, comprising a housing divided into camera evaporation and condensation wall pinned in her heat pipes placed in both chambers, and the evaporation zone of the pipe is placed in the evaporation chamber, the condensation zone of the heat pipe is placed in the camera condensation, additional heat pipes in the evaporation chamber made in the form of twisted tubes of oval profile, set one against another touch on the maximum size of the ru oval.

In heat exchangers of the condensation zone of the heat pipe can be made in the form of twisted tubes of oval profile, set one against another touch on the maximum size of the oval.

The implementation of heat pipes in the evaporation chamber or along the entire length in the form of twisted tubes of oval profile, set one against another touch on the maximum size of the oval, provides higher heat transfer coefficient in the annular space by hydrodynamic effects on the boundary layer by a spin flow in channels of complex shape formed by tightly Packed bundle of such tubes. The location of the twisted tubes of oval profile with a touch on the maximum size of the oval leads to reduction in weight and size characteristics of the heat exchanger due to more dense packing of the tubes in the volume of the heat exchanger is washed with the same perimeters of the pipes and the same thermal capacity compared exchangers due to the use of hydrodynamic intensification of heat transfer. Spiral over the medium in the annular chamber of the evaporation heat exchanger causes the transverse components of speed, further turbulence and the emergence of secondary circulation flow, which ensures alignment of the temperature field in the annular simple is ansto and the efficiency of the heat exchanger. For a given heat capacity and the same hydraulic losses, the use of beams twisted heat pipes instead of straight round tubes allows approximately 20-30% to reduce the weight and volume of the heat exchanger.

Known heat exchangers (a.c. SU # 840662, CL F 28 D 7/00; a.c. SU # 1081405, CL F 28 D 7/02; a.c. SU # 1239502, CL F 28 D 7/16)that use bundles of twisted pipes installed one against another touch on the maximum size of the oval. However, in these heat exchangers, the heat transfer is carried out by pumping the coolant in the tube and in the annular space. In the proposed technical solution tube space twisted heat pipes is closed and filled with intermediate heat carrier.

1 schematically shows a heat exchanger, a longitudinal section;

figure 2 - a section B-B in figure 1 (on the profile part of the pipe);

figure 3 shows the performance of single pipes in different ways:

a) twisted in the evaporation zone and straight into the condensation zone,

C) a fully executed twisted,

figure 4 is a variant of the heat exchanger with a fully spiral twisted tubes of oval profile;

figure 5 shows a heat exchanger with a twisted pipes in the evaporation chamber;

in Fig. 6 shows a heat exchanger with a fully developed pipe.

The heat exchanger for heat pipes includes a housing 1 (Fig 1), separated by partitions provide is dcoy 2 into two chambers; the evaporation chamber 3 and the camera condensation 4, a bundle of heat pipes 5. Pipe 5 is installed in the partition 2, pass through both chambers 3, 4, the evaporation zone and the condensation zone In (3) are placed in the chambers 3 and 4, respectively. The camera 4 is installed feeder cold atmospheric air, for example, the fan 6. The air from the chamber 4 is removed through pipe 7. Camera 3 is equipped with a feed pipe working medium 8, such as hot wastewater, and pipe outlet chilled environment 9. The evaporation zone And the heat pipes 5 into the chamber 3 made of twisted oval profile and running one against another with the touch of adjacent tubes on the maximum size of the oval (figure 2), which provides longitudinal flow environment. In the chamber 4 of the condensation zone In heat pipes 5 are made straight cylindrical (figure 1, figa). Alternatively, the zone of condensation In the heat pipes 5 can be executed in the same manner as in the evaporation chamber, in the form of twisted tubes of oval profile, set one against another with the touch of adjacent tubes on the maximum size of the oval (FIGU, 4), or completely twisted the entire length, which provides a cross-flow environment. Pipes filled with intermediate heat carrier, for example water, the internal structure is made by any known technology. Heat pipes 5 in the holes of the partition 2, the mouth is Owlery with the possibility of their replacement.

The heat exchanger for heat pipes is as follows.

Waste contaminated environment, such as hot waste water comes through the pipe 8 into the evaporation chamber 3 of the housing 1, where the longitudinal washed by the evaporation zone And the heat pipes 5. With the passage of the environment in such a space is a spiral twist environment that is rapidly heats the evaporation zone And the pipe 5, is cooled and removed from the chamber 3 through the pipe 9. Heat through the walls of the zone of evaporation And the heat pipes is transferred to the intermediate heat carrier. Due to the change of state of aggregation of the coolant heats up and boils. The vapors of coolant through the pressure drop rise up, come into the condensation zone In heat pipes 5 arranged in the chamber condensation of 4, give heat to the cold air blowing fan 6, is cooled and condensed. The air injected into the annulus of the chamber 4, perform transverse flow of the condensation zone In heat pipes 5, is heated and blown into the atmosphere through the pipe 7. Thus, due to the evaporation-condensation cycle in the heat pipe transfers heat from one chamber to another, isolated from each other by a partition, cooling wastewater. The condensate formed inside the heat pipes 5, MF is t gravity or surface tension forces on the inner surface of the heat pipe flows back to the evaporation zone And, where then evaporates again. Thus there is a continuous circulation of the coolant in a closed circuit inside the heat pipes due to the constant transition from one aggregate state to another.

In addition, during operation of the heat exchanger insoluble substance contained in the hot flow of wastewater, partially deposited on the heated surface zone of evaporation And heat pipes in the lower part of the chamber 3, resulting in the heat transfer rate decreases and the heat exchanger deteriorates. To provide intensive work exchanger heating surface heat pipes cleaned of contaminants. When damage to one or more heat pipes 5, the latter can be easily installed and retrieved from the case. The failure of one or more tubes does not result in loss of efficiency of the heat exchanger as a whole. For this purpose the bottom of the case has opened a pallet (not shown).

Thus, the proposed design of the heat exchanger is a reliable device capable of cooling and clean-up of contaminated hot wastewater. The use of twisted heat pipes oval profile reduces weight and size characteristics, and enables the creation of compact design of the heat exchanger in General, increases the heat exchange intensification and use is of external atmospheric air in a wide range reduces the cost of the heat exchanger. Developed a working draft of a heat exchanger that uses twisted tubes in the evaporator chamber (figure 5) and as an option, when used completely twisted pipes (6).

1. The heat exchanger for heat pipes, comprising a housing divided into camera evaporation and condensation wall pinned in her heat pipes placed in both chambers, and the evaporation zone of the pipe is placed in the evaporation chamber, the condensation zone of the heat pipe is placed in the camera condensation, characterized in that the heat pipes in the evaporation chamber made in the form of twisted tubes of oval profile, set one against another touch on the maximum size of the oval.

2. The heat exchanger according to claim 1, characterized in that the condensation zone of the heat pipe is also made in the form of twisted tubes of oval profile, set one against another touch on the maximum size of the oval.



 

Same patents:

Heat pipe // 2254533

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.

1 dwg

Microcooling device // 2247912

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

The invention relates to heat engineering, namely, devices for heat transfer

Heat pipe // 2241187
The invention relates to heat engineering, namely, devices for heat transfer

The invention relates to electrical engineering and can be used for cooling generators and motors closed execution

The invention relates to gas industry and can be used at the compressor (pumping) stations

The invention relates to heat engineering, in particular to heat pipes for space and ground applications with controlled temperature zone of evaporation

Heat pipe // 2219455
The invention relates to energy and thermal physics and can be used to create heat transfer heat pipes, mainly energonaprjazhenie

The invention relates to electrical engineering

Microcooling device // 2247912

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

Heat pipe // 2254533

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.

1 dwg

Heat exchanger // 2255284

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

Heat pipe // 2256862

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.

1 dwg

Thermosiphon // 2261405

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.

2 dwg

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.

7 dwg

Up!