CN207730062U - A kind of efficient CO2Gas cooler - Google Patents
A kind of efficient CO2Gas cooler Download PDFInfo
- Publication number
- CN207730062U CN207730062U CN201721345002.XU CN201721345002U CN207730062U CN 207730062 U CN207730062 U CN 207730062U CN 201721345002 U CN201721345002 U CN 201721345002U CN 207730062 U CN207730062 U CN 207730062U
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- China
- Prior art keywords
- heat exchanger
- metal layer
- tube
- double
- gas cooler
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Abstract
The utility model discloses a kind of efficient CO2Gas cooler.Wound up through double-tube heat exchanger inner tube in vertically disposed multiple rows of double-tube heat exchanger outer tube of the utility model, porous foam metal layer is laid respectively in the thermal fluid inlet section of double-tube heat exchanger inner tube and the inside pipe wall of outlet section, porous foam metal layer is fitted closely with inside pipe wall face, there is the porous metal foam material of porous foam metal layer three-dimensional structure, hole to be interconnected.The utility model perforated foams density is low, is improving CO2While gas cooler heat transfer intensity, the length of heat exchanger tube can be reduced, in the case of identical heat exchange amount, heat exchange area can be reduced, reduces the consumption of metal, heat exchanger weight is lighter, more compact structure.
Description
Technical field
The utility model is related to gas cooler fields, more specifically, being a kind of efficient for Teat pump boiler
CO2Gas cooler.
Background technology
For a long time, the mankind make entire people to sacrifice earth environment and a large amount of consumption non-renewable energy resources as cost
Class society is greatly developed.However, as punishment, aggravating circumstances also constantly alert the mankind with frequent disaster, to be apt to
Wait for the earth.Meanwhile non-renewable energy resources largely reduce, also constantly remind the mankind to pay attention to the energy make full use of and new energy
The exploitation in source.In this case, it has been very urgent to develop and utilize environment friendly refrigerating fluid.
Nowadays energy problem more and more becomes " bottleneck " of China's economic growth and social progress.China's economic development pair
Energy dependency degree is larger, and the improving efficiency of energy utilization of the task is very arduous.According to statistics, the industrial department in China is mostly used energy every year
About 2.3 hundred million tons of source standard coal.The nervous situation for how improving efficiency of energy utilization, alleviating energy resource supply is to realize that economy can be held
Matter of utmost importance to be solved in supervention exhibition.And two big subjects under discussion of environmental protection and energy saving exactly 21 century scientific technological advance.Knot
The characteristics of closing refrigeration air-conditioner and heat pump system, the research of the replacement of refrigerant and the energy saving these two aspects of system is particularly important.
European Union was proposed tightened up F-gas regulation limits high GWP refrigerant and made in refrigeration air-conditioner in April, 2014
With reduction greenhouse gas emission, slowing global warming have become the matter of utmost importance that global environmental protection work at this stage faces.Its
In, CO2Since its environmental-friendly characteristic is received the common concern of people again.The Lorentzen of Norwegian University of Science ＆ Technology
Professor thinks CO2It is most potential natural refrigerant.CO2Have many advantages, such as：1) environmental-friendly, ODP=0, GWP=1；2) safety
Nontoxic non-combustible, chemical property is stablized；3) cheap easily to obtain；4) with the compatibility of lubricating oil；5) viscosity is low, thermal coefficient is high,
With good hot physical property and flowing and heat-transfer character；6) unit volume cooling/heating amount is higher, compared with common working medium, CO2
Equipment volume is more compact compact.
Due to CO2Critical-temperature it is very low (31.1 DEG C), therefore CO2Exothermic process not instead of two-phase section condense,
Near or above heat release in the gas cooler in the region of critical point, CO at this moment2For the shooting flow on critical point
Body generates without phase-change.In CO2In Trans-critical cycle refrigeration cycle, exothermic process is alternating temperature process, there is larger temperature glide.This
Kind temperature glide just matches with required temperature-variable heat source, is a kind of special Lorenz cycle, when for heat pump cycle,
CO2It is continuously decreased into trip temperature with cooling procedure in gas cooler, but its coefficient of heat transfer is first gradually increasing, and is reached most
It is gradually reduced again after big value, this is mainly due to the coefficients of heat transfer to change acutely near pseudocritical region, and attached in pseudocritical temperature
Closely reach maximum value.However in gas cooler, the CO at entrance and outlet section2Convection transfer rate is relatively low, very
To the convection transfer rate for being less than cooling water side.In CO2Within the temperature range of gas cooler work, CO2Pair of supercritical fluid
Stream the coefficient of heat transfer variation characteristic be：The CO of entrance and outlet section2Convection transfer rate is far below the heat convection of interlude
Coefficient.For the heat transfer process of gas cooler, CO is shown as2The entrance of gas cooler and most of pipeline of outlet section
Heat transfer intensity it is relatively low, cause high efficient heat exchanging part only to account for the sub-fraction of total heat exchange pipe range.
Gas cooler is CO2The essential heat transmission equipment of refrigeration system, heat transfer effect directly affect refrigerating plant
Performance and performance driving economy.Therefore, there is an urgent need to the CO that new technology improves entrance and outlet section2Heat convection system
Number, if this can be solved the problems, such as, the heat exchange property of gas heat exchanger will greatly promote.
Utility model content
The utility model aim is to provide a kind of novel CO2Gas cooler is surpassed by improving in gas cooler
Critical CO2The convection transfer rate of fluid line entrance and outlet section, to improve the overall heat exchange performance of gas cooler.
In order to solve problem above, technical solution adopted in the utility model is：A kind of efficient CO2Gas cooling
Device, wound up through double-tube heat exchanger inner tube in vertically disposed multiple rows of double-tube heat exchanger outer tube, characterized in that in double-tube heat exchanger
The thermal fluid inlet section of inner tube and the inside pipe wall of outlet section lay porous foam metal layer respectively, porous foam metal layer in pipe
Wall surface fits closely.There is the porous metal foam material of porous foam metal layer three-dimensional structure, hole to be interconnected.
The foam metal layer be foam copper, foamed aluminium, foamed iron, nickel foam it is one or more.
The foam metal layer surface is provided with straight line or spiral shape conduit.
The foam metal layer diameter is bigger 0.1-0.3mm than the internal diameter of double-tube heat exchanger inner tubal wall.
There is porous metal foam material three-dimensional structure, hole to be interconnected, and make it have larger specific surface
Product, heat exchange area and good circulation, and the thermal coefficient of solid skeletal copper is higher, heat conduction, bone inside solid skeletal
Both heat convections between frame surface and fluid interact, and the rate of heat transfer of porous foam wall surface is greatly improved.When having
When fluid flow through orifice hole, on the one hand, the foam pores size and shape of porous metal foam material is different so that fluid exists
Velocity flow profile is extremely uneven in porous foam hole, the non-linear enhancing of flowing, and turbulent extent increases；On the other hand, in pipe
After porous foam metal material is added, fluid flows in porous foam, can be disturbed by solid skeletal ligament, promote fluid
Flow velocity is constantly changing size and Orientation, washes away porous foam hole solid wall surface, accelerate in hole the mixing of fluid particle with
Separation, weakens the boundary layer thickness of hole wall, to achieve the effect that enhanced heat exchange.
The utility model has the advantages and positive effects of：
(1) refrigerant of refrigeration system is natural refrigerant CO2。CO2GWP be 1, ODP 0, it is safe and non-toxic non-combustible, honest and clean
Valence easily obtains, and is that environmental-friendly refrigerant alleviates greenhouse effects significantly compared with the existing refrigerant used, environmental protection is excellent
Gesture is apparent.
(2) perforated foams have unique 3 D stereo reticular structure, and density is low, specific surface area is high, in tube wall
Foam metal material is laid in surface face, can enhance CO2The disturbance of supercritical fluid reduces boundary layer thickness, and then enhances disengaging
CO at mouthful2The convection transfer rate of supercritical fluid, the final heat transfer intensity for improving gas cooler.
(3)CO2Viscosity it is smaller, inner surface of tube wall lay foam metal material after, CO2The flow resistance of side increases unknown
It is aobvious, and CO2The operating pressure of gas cooler is higher, and the pressure reduction in gas cooler is not notable, to system performance
Under the premise of influencing less, it is remarkably improved the heat exchange property of heat exchanger.
(4) perforated foams density is low, is improving CO2While gas cooler heat transfer intensity, heat exchanger tube can be reduced
Length can reduce heat exchange area in the case of identical heat exchange amount, reduce the consumption of metal, heat exchanger weight is lighter, structure
It is more compact.
Description of the drawings
Fig. 1 is the overall schematic of the utility model；
Fig. 2 is the partial enlarged view of the utility model；
Fig. 3 is (linear type conduit foam metal layer) sectional view in double-tube heat exchanger interior conduit；
Fig. 4 is linear type conduit partial schematic diagram；
Fig. 5 be in double-tube heat exchanger interior conduit (with the spiral linear conduit foam metal layer of single direction) sectional view,
Fig. 6 is spiral line type conduit partial schematic diagram.
Specific implementation mode
In order to make the feature, the purpose reached and effect of the utility model be easy to understand, with reference to being specifically illustrating,
The utility model is expanded on further.
As depicted in figs. 1 and 2, a kind of efficient CO2Gas cooler, vertically disposed multiple rows of double-tube heat exchanger outer tube 1
Interior wound up through double-tube heat exchanger inner tube 2, in the thermal fluid inlet section of double-tube heat exchanger inner tube and the inside pipe wall difference of outlet section
Porous foam metal layer 3 is laid, porous foam metal layer is fitted closely with inside pipe wall face.The porous metals of porous foam metal layer
There is foamed material three-dimensional structure, hole to be interconnected.
Embodiment one：
The material of double-tube heat exchanger inner tube is generally copper, the foam metal layer be foam copper, foamed aluminium, foamed iron,
Nickel foam it is one or more.It is provided with straight line or spiral shape conduit in foam metal layer surface, Fig. 3 is double-tube heat exchanger interior conduit
Interior (linear type conduit foam metal layer) sectional view, Fig. 4 are linear type conduit partial schematic diagram.Due to double-tube heat exchanger inner tube with
The foam metal is not integrated, and material is it is also possible to difference, to make the two closely connect together, the two should use interference
Cooperation, foam metal layer diameter are bigger 0.1-0.3mm than the internal diameter of double-tube heat exchanger inner tubal wall.
Embodiment two：
What is different from the first embodiment is that Fig. 5 (is steeped with the spiral linear conduit of single direction in double-tube heat exchanger interior conduit
Foam metal layer) sectional view, Fig. 6 is spiral line type conduit partial schematic diagram.Change foam metal layer surface shape primarily to
Increase heat exchange area, to improve the heat exchange efficiency of heat exchanger tube.
The above is the main feature of the utility model, and the embodiment is the utility model preferred embodiment.This
The protected range of utility model is not limited thereto, and the utility model also has various changes and improvements, any to be based on this reality
It is belonged within the scope of protection of the utility model with the equivalent transformation of new technique scheme.
Claims (4)
1. a kind of efficient CO2Gas cooler, wound up through double-tube heat exchanger in vertically disposed multiple rows of double-tube heat exchanger outer tube
Inner tube, characterized in that lay porous foam respectively in the thermal fluid inlet section of double-tube heat exchanger inner tube and the inside pipe wall of outlet section
Metal layer, porous foam metal layer are fitted closely with inside pipe wall face, and the porous metal foam material of porous foam metal layer has
Three-dimensional structure, hole are interconnected.
2. efficient CO according to claim 12Gas cooler, characterized in that the foam metal layer is foam
Copper, foamed aluminium, foamed iron, nickel foam it is one or more.
3. efficient CO according to claim 12Gas cooler, characterized in that the foam metal layer surface is provided with directly
Line or spiral shape conduit.
4. efficient CO according to claim 12Gas cooler, characterized in that the foam metal layer diameter compares casing
The big 0.1-0.3mm of internal diameter of inner tube of heat exchanger wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721345002.XU CN207730062U (en) | 2017-10-19 | 2017-10-19 | A kind of efficient CO2Gas cooler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721345002.XU CN207730062U (en) | 2017-10-19 | 2017-10-19 | A kind of efficient CO2Gas cooler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207730062U true CN207730062U (en) | 2018-08-14 |
Family
ID=63090915
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721345002.XU Expired - Fee Related CN207730062U (en) | 2017-10-19 | 2017-10-19 | A kind of efficient CO2Gas cooler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207730062U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107830751A (en) * | 2017-10-19 | 2018-03-23 | 天津商业大学 | A kind of efficient CO2Gas cooler |
-
2017
- 2017-10-19 CN CN201721345002.XU patent/CN207730062U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107830751A (en) * | 2017-10-19 | 2018-03-23 | 天津商业大学 | A kind of efficient CO2Gas cooler |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180814 Termination date: 20191019 |