CN104792218B - Strengthen the method and device of low temperature oxygen-bearing fluid heat transfer using thermomagnetic convection - Google Patents
Strengthen the method and device of low temperature oxygen-bearing fluid heat transfer using thermomagnetic convection Download PDFInfo
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- CN104792218B CN104792218B CN201510191991.0A CN201510191991A CN104792218B CN 104792218 B CN104792218 B CN 104792218B CN 201510191991 A CN201510191991 A CN 201510191991A CN 104792218 B CN104792218 B CN 104792218B
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Abstract
The invention discloses a kind of device of utilization thermomagnetic convection reinforcing low temperature oxygen-bearing fluid heat transfer, including two with heat exchanging fluid gateway end sockets, and the heat exchange core body between two end sockets；Provided with the heat exchanger channels connected respectively with corresponding heat exchanging fluid gateway in the heat exchange core body, it is low temperature oxygen-bearing fluid at least one group heat exchanger channels, the device of the utilization thermomagnetic convection reinforcing low temperature oxygen-bearing fluid heat transfer also includes the field generator for magnetic that Actions of Gradient Magnetic Field power is produced to the low temperature oxygen-bearing fluid.The invention also discloses a kind of method of utilization thermomagnetic convection reinforcing low temperature oxygen-bearing fluid heat transfer.The present invention realizes the reinforcing of heat convection on the premise of not changing heat exchanger structure, not introducing additional friction, improves heat exchange efficiency, reduce heat exchanger volume and energy consumption by making heat exchange surface formation high-gradient magnetic field around the outer magnet of heat exchange core body.
Description
Technical field
Strengthen the method that low temperature oxygen-bearing fluid conducts heat the present invention relates to cryogenic media heat exchange, more particularly to using thermomagnetic convection
And device.
Background technology
Heat exchanger is the main place for realizing cold fluid and hot fluid heat exchange.Cryogenic heat exchanger is being separated into representative with air
Occupy critical role in large scale industry flow.In air compression process, needed to improve compression efficiency between casing cooling, level
Cooler；Need to set main heat exchanger in air liquefaction circulation；Have again in the ice chest of air-separating plant liquefier, subcooler with
And the main condenser evaporator in the middle part of rectifying device etc..The performance of these heat exchangers directly affects stable operation and the warp of whole system
Ji index.
When heat exchanger works in below 120K low temperature environment, typically with following features：
(1) heat exchange efficiency requires high, and cryogenic heat exchanger consumption is low temperature cold, and temperature is lower, the cost spent of freezing
It is higher.Therefore in order to reduce the energy loss in heat transfer process, it is desirable to which heat transfer temperature difference is tried one's best reduction, heat exchange efficiency is tried one's best
It is high.This is also the main cause that cost very high high-efficiency compact formula heat exchanger is widely used in cryogenic system.
(2) permission resistance is small, and the resistance of heat exchanger directly affects energy consumption, especially in low-pressure industrial flow, heat exchanging
The resistance of device is very harsh, and the allowable pressure drop under heavy traffic condition only has 0.01~0.02MPa.
(3) based on heat convection, from heat transfer type, because temperature is very low, the ratio very little shared by radiation heat transfer,
It is negligible.Heat transfer type is based on convection current.For enhanced heat exchange, energy consumption is reduced, it is necessary to improve convection transfer rate.
In summary, for the heat exchanger worked under low temperature environment, all requirements are harsher.Large-scale air is separated
In device, due to integral solder technique and the limitation of communications and transportation, also there are strict requirements for the volume of heat exchanger.Therefore exist
Under the premise of existing processing technology and permission volume, cryogenic heat exchanger efficiency is improved, and then reduces energy consumption, improve productivity ratio, is had
Realistic meaning.By taking most common plate-fin heat exchanger in space division system as an example, the measure of current augmentation of heat transfer mainly has：
(1) heat transfer area is increased, heat transfer area is bigger, and the heat transmitted is more, the fin in plate-fin heat exchanger
Just serve the effect of increase heat exchange area.At present, heat exchange area increase is mainly subject to processing technique and the limit of heat exchanger volume
System.
(2) temperature difference is increased, can arrange to realize by rationally compact runner, current comparative maturity, but heat transfer temperature difference
Increase also brings along certain irreversible loss.
(3) strengthen heat convection, boundary layer is mainly destroyed by sawtooth, ripple, perforated fin, such as Li Qing is in application number
To propose mixed type fin in CN 201410364670.1 patent document.It is the main trend of current heat exchanger reinforcing, shortcoming
It is that can introduce additional friction, destroys heat exchanger intensity.
Heat exchanger in air separating technological, the medium for participating in heat exchange is usually liquid oxygen or oxygen-bearing fluid.These media
Due to containing substantial amounts of oxygen molecule, typically with over paramagnetism, it can be attracted to a magnet.Oxygen can be controlled using this property
Flowing, or even realize the patent document such as Application No. CN 200510086240.9 and Application No. CN200820010636.4
The magnetic oxygen separating of middle proposition.Yang Kunlun etc. proposes a kind of bag in Application No. CN 200610165529.4 patent document
Magnetic fluid heat-exchange system containing heater, magnetic pole and closed loop, realizes the convection cell without Mechanical Driven in fixed loop
Road.
There is presently no the relevant report for the method and device for strengthening the heat transfer of low temperature oxygen-bearing fluid using thermomagnetic convection.
The content of the invention
In order to further improve the operational efficiency of cryogenic heat exchanger, the present invention provides a kind of noncontact, heat exchange efficiency height, body
The method and apparatus of the product utilization thermomagnetic convection that small, flow resistance is small, additional energy consumption is low reinforcing low temperature oxygen-bearing fluid heat transfer.
A kind of device of utilization thermomagnetic convection reinforcing low temperature oxygen-bearing fluid heat transfer, including two with heat exchanging fluid gateway
Individual end socket, and the heat exchange core body between two end sockets；It is provided with corresponding heat exchanging fluid to go out respectively in the heat exchange core body
It is low temperature oxygen-bearing fluid in the heat exchanger channels of entrance connection, at least one group heat exchanger channels, the utilization thermomagnetic convection reinforcing is low
The device of warm oxygen-bearing fluid heat transfer also includes the field generator for magnetic that Actions of Gradient Magnetic Field power is produced to the low temperature oxygen-bearing fluid.
In field of low-temperature refrigeration, cryogen generally refers to oxygen, nitrogen, argon, hydrogen, the helium of liquid, and its mixture etc..This hair
The bright low temperature oxygen-bearing fluid mentioned generally refers to liquid oxygen or other oxygen-containing fluid-mixings, such as liquid air.
The oxygen of liquid is a kind of over paramagnetism fluid, and the low temperature oxygen-bearing fluid for participating in heat exchange will be by towards magnetic field intensity
The magnetizing force of augment direction.Simultaneously as paramagnetic gas defers to Curie's law (magnetic susceptibility is inversely proportional with thermodynamic temperature), it is low
The magnetic susceptibility of the lower oxygen of temperature will be greatly improved, and during -183.15 DEG C of temperature, the volume susceptibility of liquid oxygen is 0.00345.On the contrary,
Common other pure matter liquid only have quite faint diamagnetism, and magnitude of magnetic susceptibility is temperature independent.
If a non-uniform magnetic-field is placed near paramagnetism fluid, paramagnetism fluid is flowed to high magnetic by magnetic field suction
Induction region.Such as fluid is heated while flowing, fluid temperature (F.T.) rise is reduced by the attraction in magnetic field, so that by
Arrive the high cold fluid of magnetic susceptibility below to push, discharge high magnetic flux density region.Then in the synthesis of non-uniform magnetic-field and hot-fluid
Under effect, constantly there is paramagnetism fluid to flow through non-uniform magnetic-field, this phenomenon is referred to as thermomagnetic convection or magnetic wind.
The operation principle of the present invention is by applying non-uniform magnetic-field to paramagnetic low temperature oxygen-bearing fluid so that exchanged heat logical
Because thermomagnetic convection phenomenon forms many unstable vortex in road, the premise of heat exchanger mechanical structure is not being changed so as to realize
The lower purpose realized destruction boundary layer, increase convection transfer rate.
Preferably, the field generator for magnetic includes：
It is enclosed in the outer magnet of heat exchange core body periphery；
In the magnetic field of outer magnet, and the one or more inner magnets set close to heat exchanger channels side wall.
Wherein outer magnet carries externally-applied magnetic field, and inner magnet can possess magneticaction under additional magnetic fields.The present invention's is interior
Magnet is generally soft magnetic bodies, and when outer magnet works, inner magnet possesses magnetic, when the externally-applied magnetic field active force of outer magnet disappears
When, the magnetic force of inner magnet also disappears.In the presence of externally-applied magnetic field, the inner magnet surface will form very high magnetic field gradient.
In addition, inner magnet is generally located on the heat exchanger channels adjacent sidewalls that those supply low temperature oxygen-bearing fluid to pass through, low temperature oxygen atom is carried
For magnetic force.
Preferably, the outer magnet is superconducting magnet.Because the utilization thermomagnetic convection of the present invention strengthens low temperature oxygen-containing stream
The device of body heat transferring is under low temperature in itself, without extra superconduction cooling device, can be on the premise of little energy is consumed
Obtain very high magnetic field intensity.
Preferably, the inner magnet is the magnetic conductive part independently of heat exchanger channels.Now, between inner magnet and heat exchanger channels
It can be independently arranged, as further preferred, the magnetic conductive part is axially consistent with heat exchanger channels length direction multiple independent
Magnetic conductive rod, multiple magnetic conductive rods are arranged circumferentially along heat exchanger channels side wall.
Preferably, the inner magnet is the magnetic conduction bar being wholely set with heat exchanger channels side wall, phase between multiple magnetic conduction bars
Mutually isolation.During processing, it is made up of this sheet stamping for being coated with magnetic conductive metal as permeability magnetic material or surface, in externally-applied magnetic field
Under effect, the heat exchange core body will form very high magnetic field gradient.
Preferably, the length direction of the magnetic conduction bar is consistent with heat exchanger channels length direction, and multiple magnetic conduction bars edge is changed
Passage of heat side wall is arranged circumferentially.Using the technical scheme, it is ensured that produce unstable vortex in low temperature oxygen-bearing fluid.
Preferably, the heat exchange core body includes：
Some dividing plates be arrangeding in parallel；
It is disposed on the fin between two neighboring dividing plate；
The both sides of each fin are fixed with two neighboring dividing plate respectively, and heat exchanger channels are provided between fin and dividing plate.
In above-mentioned technical proposal, the heat exchange core body is stacked alternately with dividing plate by multiple fins and constituted, each fin both sides
It is connected with strip of paper used for sealing.The present invention is contactless recuperator, and the wall for participating in heat exchange carries magnetic field, and at wall
Magnetic field intensity it is stronger.The fin is the forms such as plain fin, corrugated fin or perforated fin, and the heat exchange core body passes through
The technology welding forming such as vacuum brazing or diffusion fusion weldering.One or more strands of heat transfer mediums in plate-fin heat exchanger contain for low temperature
Oxygen fluid.
In the present invention, as needed, dispensing section and flow deflector can be set between end socket and heat exchange core body, changed for realizing
Heat exchanger channels and the connection of heat exchanging fluid gateway in hot core body.
Present invention also offers a kind of method of utilization thermomagnetic convection reinforcing low temperature oxygen-bearing fluid heat transfer, including：By two strands
Or more than two strands heat exchanging fluids carry out contactless heat exchange, at least one heat exchange is flowed in this two strands or more than two strands heat exchanging fluids
Body is low temperature oxygen-bearing fluid；In heat transfer process, while applying Actions of Gradient Magnetic Field power to low temperature oxygen-bearing fluid so that by gradient magnetic
The low temperature oxygen-bearing fluid of field action power produces vortex, and hot fluid releases thermal temperature reduction, and cold fluid absorbs thermal temperature rise,
To complete heat transfer.
Referring to Fig. 4, in the present invention, for a heat exchanger channels, the temperature of fluid is relatively low at the A away from wall, by very
The strong magnetizing force towards wall, so as to be flowed towards the direction of wall；Close to the absorption of fluids wall of wall at the B of wall
Heat Q that face is transmitted and temperature is raised, magnetic susceptibility reduction, the magnetizing force being subject to weakens, the transverse movement under the promotion of fluid at the A
To C；Fluid temperature (F.T.) is further raised in motion process, and constantly pouring into fluid at wall, C due to cold fluid is squeezed and remote
Wall moves to D；Due to the effect of inertia, and in order to supplement the fluid motion at the fluid being lost at A, D to A, and at this
Peripherad cold fluid releases heat, temperature reduction during one, so as to complete a circulation.In described heat exchanger channels,
Many similar unstable vortex can be formed, so that the convection current ceaselessly destroyed in the laminar boundary layer close to wall, fluid
Therefore heat transfer process is strengthened, and the heat exchange efficiency of whole heat exchanger is improved.
The present invention is not changing heat exchanger by making heat exchange surface formation high-gradient magnetic field around the outer magnet of heat exchange core body
Structure, do not introduce additional friction on the premise of realize the reinforcing of heat convection, improve heat exchange efficiency.The low temperature works such as air separation
In industry flow often using liquid oxygen or oxygen-bearing fluid as heat-exchange working medium, and possess superconduction kicker magnet work needed for low temperature environment,
There is good associativity with the present invention.
The method and device of the utilization thermomagnetic convection reinforcing low temperature oxygen-bearing fluid heat transfer of the present invention, is applied by exchanging thermal medium
Plus non-uniform magnetic-field so that many unstable vortex are formed in heat exchanger channels, heat exchanger machinery knot is not being changed so as to realize
Boundary layer is destroyed on the premise of structure, increases the purpose of convection transfer rate.Cryogenic heat exchanger in the present invention has heat exchange efficiency
The characteristics of height, small volume, flow resistance be small, additional energy consumption is low.
Brief description of the drawings
Fig. 1 is the structural representation for the device for strengthening the heat transfer of low temperature oxygen-bearing fluid using thermomagnetic convection；
Fig. 2 is the A-A sectional views of device described in Fig. 1；
Fig. 3 is the three-dimensional structure diagram of individual layer heat exchanger channels in Fig. 1；
Fig. 4 is the thermomagnetic convection schematic diagram in single heat exchanger channels in Fig. 3；
Fig. 5 is thermomagnetic convection VELOCITY DISTRIBUTION simulation result in rectangularl runner；
Fig. 6 is the section average temperature distribution figure of streamwise in rectangularl runner in Fig. 5；
Fig. 7 is the structural representation of simulator in embodiment.
Fig. 8 is the distribution diagram of magnetic line of force of simulator in embodiment.
In above-mentioned accompanying drawing；
1. fin, 2. dividing plates, 3. strip of paper used for sealings, 4. heat exchange core bodies, 5. outer magnets, 6. dispensing sections, 7. end sockets, 8. flow deflectors, 9.
Inner magnet, 10. heat exchanger channels.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings：
A kind of method of utilization thermomagnetic convection reinforcing low temperature oxygen-bearing fluid heat transfer, including two strands or more than two strands low temperature it is oxygen-containing
Fluid carries out contactless heat exchange in heat exchanger channels, and then hot fluid releases thermal temperature reduction, and cold fluid absorbs heat temperature
Degree rise, the gradient magnetic of power can be acted to oxygen molecule by being provided with cold fluid and hot fluid heat exchange area.
Above-mentioned contactless heat exchange can be carried out in contactless recuperator, and the wall for participating in heat exchange carries magnetic
, and the magnetic field intensity at wall is stronger.Because the oxygen of liquid is a kind of over paramagnetism liquid, containing for heat exchange is participated in
Oxygen fluid is by by the magnetizing force towards magnetic field intensity augment direction.
As shown in Figure 1, 2, realize that a kind of thermomagnetic convection of above-mentioned thermomagnetic convection reinforcing low temperature oxygen-bearing fluid heat-transferring method is strong
Change low temperature oxygen-bearing fluid heat transfer unit (HTU), including plate-fin heat exchanger, plate-fin heat exchanger includes heat exchange core body 4, outer magnet 5, envelope
First 7, dispensing section 6 and it is arranged on the interior magnetic for coordinating with outer magnet 5 in heat exchange core body 4 and gradient magnetic being formed in heat exchanger channels
Body.It is provided with end socket 7 one or more strands of for low temperature oxygen-bearing fluid in heat exchanging fluid a, b, c, d import and export, a, b, c, d.
End socket 7 is connected with dispensing section 6, and dispensing section 6 is connected with heat exchange core body 4, for heat exchanging fluid a, b, c, d import and export and heat exchange core
The connection of heat exchanger channels in body 4.Outer magnet 5 is arranged around heat exchange core body 4, so that magnetic field is provided inside heat exchange core body 4, it is internal
Magnet forms gradient magnetic under the magnetic fields of outer magnet 5 in heat exchanger channels.
Referring also to Fig. 3, heat exchange core body 4 is stacked alternately with dividing plate 2 by multiple fins 1 and constituted, each both sides of fin 1 and envelope
Bar 3 is connected, and passes through the technology welding forming such as vacuum brazing or diffusion fusion weldering between fin 1, dividing plate 2, strip of paper used for sealing 3.Fin 1 and two
The heat exchanger channels of multiple rectangles are formed between two dividing plates 2 of side.Fin 1 is plain fin, corrugated fin or perforated fin
Etc. form.
Outer magnet 5 can be made using superconducting coil, for example, can use commercially available superconducting magnet.Because heat exchanger is originally in
In under low temperature, without extra superconduction cooling device, very high magnetic field intensity can be obtained on the premise of little energy is consumed.
As shown in figure 3, inner magnet 9 can be the magnetic conductive part being arranged in heat exchanger channels, or inner magnet can be and fin 1
Or/and the magnetic conduction bar that dividing plate 2 is wholely set, inner magnet can be only arranged on fin 1 or dividing plate 2, also can fin 1 and every
Set simultaneously on plate 2, multiple inner magnet general warranties are separate, to form multiple magnetic field gradients, increase the work to oxygen molecule
Firmly, in the presence of externally-applied magnetic field, fin 1 will form very high magnetic field gradient with the surface of dividing plate 2.Inner magnet is magnetic conductive part
When, magnetic conductive rod may be selected, magnetic conductive rod can be along heat exchanger channels inwall circumferentially, such as the length direction with heat exchanger channels is put down
OK., can be by the magnetic conduction bar thin plate of bar shaped according to certain orientation when inner magnet is the magnetic conduction bar being arranged on fin 1 or/and dividing plate 2
Punching press is on fin 1 or/and dividing plate 2, such as described magnetic conduction bar is along a plurality of of heat exchanger channels length direction, and along heat exchanger channels
Inwall is uniformly distributed.
As shown in figure 4, for a heat exchanger channels, lower surface has heat Q incoming.The temperature of fluid at A away from wall
It is relatively low, by the very strong magnetizing force towards wall, so as to be flowed towards the direction of wall；Close to wall at the B of wall
The heat that transmits of absorption of fluids wall and temperature is raised, magnetic susceptibility reduction, the magnetizing force being subject to weakens, and fluid pushes away at A
C is laterally moved under dynamic；Fluid temperature (F.T.) is further raised in motion process, due to cold fluid constantly pour at wall, C fluid by
To extruding D is moved to away from wall；Due to the effect of inertia, and in order to supplement the fluid fortune at the fluid being lost at A, D
A is moved, and peripherad cold fluid releases heat, temperature reduction in this course, so as to complete a circulation.Described
In heat exchanger channels, many similar unstable vortex can be formed, so that the laminar boundary layer close to wall is ceaselessly destroyed, stream
Therefore Convective Heat Transfer in body is strengthened, and the heat exchange efficiency of whole heat exchanger is improved.
In order to verify liquid in facilitation of the high-gradient magnetic field for low temperature oxygen-bearing fluid convection heat transfer' heat-transfer by convection, the exchange passage of heat 10
Flowing and heat transfer conditions of the oxygen fluid under the conditions of the magnetic induction intensity without magnetic field and outer magnet 5 is 0T, 1T, 2T, 5T, 10T are entered
Finite element simulation is gone, gradient magnetic is built by the cylindrical magnetic conduction silicon steel for pressing close to wall.Entrance liquid oxygen temperature is set as 70K,
Heat exchanger channels wall maintains 90K constant temperature.
Fig. 7 is emulation apparatus structure schematic diagram, and inner magnet 9 is cylindrical magnetic conduction silicon steel in Fig. 7, is arranged on changing for rectangle
The side wall outer wall of the passage of heat 10.The width of heat exchanger channels 10 is 10mm, and length is 100mm, and low temperature oxygen-bearing fluid is liquid oxygen.
Fig. 8 is the magnetic force distribution figure in simulator.As can be known from Fig. 8, under outer magnet 5 is acted on, the magnetic conduction of inner magnet 9,
The surrounding of inner magnet 9 produces magnetic field gradient.
As shown in figure 5, the fluid under the liquid oxygen VELOCITY DISTRIBUTION in heat exchanger channels 10, no magnetic field conditions maintains Laminar Flow,
Stable boundary layer is formd pressing close at wall；And under 1T background magnetic fields, because oxygen molecule is acted on by magnetic field force,
Press close at heat transfer wall and form several vortex, the presence of these vortex destroys flow boundary layer, promotes cold fluid and hot fluid
Quick mixing, can play a part of strengthening convection current.
As shown in fig. 6, in rectangularl runner streamwise section average temperature distribution, in the presence of background magnetic field,
Because the convection current of inner fluid passage is strengthened, the slope of streamwise temperature change is significantly increased, and background magnetic field
Intensity is higher, and the speed of heating is faster.This shows that the magnetic thermal convection current that gradient magnetic and heat drive jointly has been effectively facilitated logical
The heat transfer of oxygen-bearing fluid and wall in road, the heat transfer efficiency of passage is significantly improved.
Claims (2)
1. a kind of device of utilization thermomagnetic convection reinforcing low temperature oxygen-bearing fluid heat transfer, including two with heat exchanging fluid gateway
End socket, and the heat exchange core body between two end sockets；It is provided with and is come in and gone out respectively with corresponding heat exchanging fluid in the heat exchange core body
It is low temperature oxygen-bearing fluid in the heat exchanger channels of mouth connection, at least one group heat exchanger channels, it is characterised in that also including to described low
Warm oxygen-bearing fluid produces the field generator for magnetic of Actions of Gradient Magnetic Field power；
The field generator for magnetic includes：
The outer magnet of heat exchange core body periphery is enclosed in, the outer magnet is superconducting magnet；
In the magnetic field of outer magnet, and the one or more inner magnets set close to heat exchanger channels side wall；
The inner magnet is mutually isolated between the magnetic conduction bar being wholely set with heat exchanger channels side wall, multiple magnetic conduction bars；It is described to lead
The length direction of magnetic stripe is consistent with heat exchanger channels length direction, and multiple magnetic conduction bars are arranged circumferentially along heat exchanger channels side wall.
2. the device of utilization thermomagnetic convection reinforcing low temperature oxygen-bearing fluid heat transfer according to claim 1, it is characterised in that institute
Stating heat exchange core body includes：
Some dividing plates be arrangeding in parallel；
It is disposed on the fin between two neighboring dividing plate；
The both sides of each fin are fixed with two neighboring dividing plate respectively, and heat exchanger channels are provided between fin and dividing plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510191991.0A CN104792218B (en) | 2015-04-22 | 2015-04-22 | Strengthen the method and device of low temperature oxygen-bearing fluid heat transfer using thermomagnetic convection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510191991.0A CN104792218B (en) | 2015-04-22 | 2015-04-22 | Strengthen the method and device of low temperature oxygen-bearing fluid heat transfer using thermomagnetic convection |
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| CN104792218A CN104792218A (en) | 2015-07-22 |
| CN104792218B true CN104792218B (en) | 2017-10-24 |
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| CN106767084A (en) * | 2016-12-01 | 2017-05-31 | 中国船舶重工集团公司第七〇九研究所 | A kind of contactless fluid-mixing strengthened heat exchange method and heat-exchanger rig |
| CN107606719B (en) * | 2017-10-27 | 2022-12-20 | 润壤科技（黄石）有限公司 | Integrated multifunctional frostless heat exchanger |
| CN113154437A (en) * | 2021-04-20 | 2021-07-23 | 西安热工研究院有限公司 | Boiler oxygen-enriched combustion system capable of improving oxygen concentration based on magnetization |
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| CN2847175Y (en) * | 2005-07-28 | 2006-12-13 | 西北工业大学 | Semiconductor refrigerating thermomagnetic circulation heat radiator |
| CN100552368C (en) * | 2006-12-21 | 2009-10-21 | 清华大学 | Thermomagnetic convection formula magnetic fluid heat convection system |
| DE602008004819D1 (en) * | 2008-04-30 | 2011-03-17 | Abb Research Ltd | heat exchanger device |
| GB2464299B (en) * | 2008-10-09 | 2013-05-08 | Ibrahim Ghulam Murad Ali | A system and method for increasing efficiency in a radiator |
| CN101832723A (en) * | 2010-04-29 | 2010-09-15 | 华南理工大学 | Plate-fin heat exchanger for gas heater |
| CN102967172B (en) * | 2011-09-01 | 2015-09-09 | 台达电子工业股份有限公司 | Magnetic thermal modules and magnetic thermal |
| CN102865759A (en) * | 2012-09-29 | 2013-01-09 | 河南开元空分集团有限公司 | Integral main cold hot siphon evaporator |
| CN204718476U (en) * | 2015-04-22 | 2015-10-21 | 浙江大学 | Thermomagnetic convection is utilized to strengthen the device of low temperature oxygen-bearing fluid heat transfer |
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