CN102089612A - Design characteristics for heat exchanger distribution insert - Google Patents

Design characteristics for heat exchanger distribution insert Download PDF

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Publication number
CN102089612A
CN102089612A CN2009801267159A CN200980126715A CN102089612A CN 102089612 A CN102089612 A CN 102089612A CN 2009801267159 A CN2009801267159 A CN 2009801267159A CN 200980126715 A CN200980126715 A CN 200980126715A CN 102089612 A CN102089612 A CN 102089612A
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China
Prior art keywords
heat exchanger
distribution insert
design
insert
design characteristics
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CN2009801267159A
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Chinese (zh)
Inventor
M·F·塔拉斯
S·本达普迪
Y·蒋
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Carrier Corp
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Carrier Corp
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Publication of CN102089612A publication Critical patent/CN102089612A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/026—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits
    • F28F9/027—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits in the form of distribution pipes
    • F28F9/0273—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits in the form of distribution pipes with multiple holes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B39/00—Evaporators; Condensers
    • F25B39/02—Evaporators
    • F25B39/028—Evaporators having distributing means

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

A heat exchanger includes heat exchange tubes, a manifold, and a distribution insert incorporating orifices that communicate a fluid into the manifold for distribution into the heat exchange tubes. A design characteristic of the distribution insert and another design characteristic of at least one of the distribution insert, the manifold and the heat exchange tubes are employed to determine an essential design relationship. The essential design relationship defines a design parameter, the value of which falls within a determined range of values.

Description

Heat exchanger distributes the design characteristics of insert
Related application
The application requires the priority of the U.S. Provisional Patent Application 61/079,521 of submission on July 10th, 2008.
Background technology
The microchannel of refrigeration system or air-conditioning system or small size tunnel heat exchanger comprise a plurality of parallel flat heat exchange tube, and cold-producing medium is distributed in this heat exchanger tube.Inlet manifold is communicated with the heat exchanger tube fluid, and heat exchanger tube is substantially perpendicular to the direction by the cold-producing medium stream of inlet manifold.Heat exchanger can have many logical journeys structures to conduct heat by balance and optimization and drooping characteristic improves performance, and this realizes by a plurality of parallel heat exchanger tubes of employing in each cold-producing medium leads to journey (pass) usually.Single-pass journey structure is more expected in evaporator application usually, because refrigerant pressure drop plays dominating role in performance of evaporator.
The maldistribution of cold-producing medium in heat exchanger tube may take place, with in heat exchanger tube equably under the situation of assignment system cryogen attainable performance compare, this may cause the performance of heat exchanger to reduce.When maldistribution usually occurs in the two-phase system cryogen and enters inlet manifold.The gas phase of two-phase system cryogen is compared with liquid phase refrigerant has significantly different character, moves with different speed, and is subjected to the different external force and the effect of internal force.Gas phase and liquid phase separation also flow independently, thereby cause the cold-producing medium maldistribution.
Can distribute insert to improve the distribution of cold-producing medium inner employing of the inlet manifold of heat exchanger.Cold-producing medium enters heat exchanger and flows into inlet manifold by the aperture in the distribution insert by distributing insert.Because the essence of two-phase system refrigerant flow is difficult to design and distributes insert.
Summary of the invention
A kind of heat exchanger comprises heat exchanger tube, manifold and distribution insert, and described distribution insert comprises the aperture, and described aperture is sent in the described manifold fluid so that be assigned in the described heat exchanger tube.Another design characteristics of at least one in one design characteristics of described distribution insert and described distribution insert, described manifold and the described heat exchanger tube is used to determine basic design relation.Described basic design relation limits design parameter, and described design parameter drops in the scope of definite value.
In a further exemplary embodiment, a kind of method that designs heat exchanger comprises step: the scope of determined value and selection distribute at least one design characteristics of insert.Described distribution insert comprises the aperture, and described distribution insert is received within the manifold.Fluid is transmitted through described a plurality of aperture and enters in the manifold so that be assigned in the heat exchanger tube.Described method also comprises step: determine the relation between described at least one design characteristics of described distribution insert and at least one another characteristic in described distribution insert, described manifold and the described heat exchanger tube.Described basic design relation limits the design parameter in the scope that drops on described value.
Can understand these and other feature of the present invention best by following specification and accompanying drawing, be brief description of drawings below.
Description of drawings
Fig. 1 illustrates exemplary refrigeration system;
Fig. 2 illustrates the side view of inlet part of the manifold of heat exchanger; And
Fig. 3 illustrates the perspective view of inlet part of the manifold of heat exchanger, shows various sizes.
The specific embodiment
Fig. 1 illustrates basic refrigeration or the air-conditioning system 20 that comprises compressor 22, and described compressor 22 arrives condenser 24 with the cold-producing medium compression and with its downstream delivery.In condenser 24, cold-producing medium is discharged heat to a secondary fluid.Cold-producing medium passes bloating plant 26 and is expanded to low pressure from condenser 24.Cold-producing medium through expanding flows into the import refrigerant tubing 28 that leads to evaporimeter 30.In evaporimeter 30, cold-producing medium is accepted heat from another a secondary fluid.Cold-producing medium turns back to compressor 22 from evaporimeter 30, finishes closed-loop refrigerant circuits.
Air-conditioning system 20 can comprise the flow of refrigerant control appliance, such as at the schematically illustrated four-way change-over valve in Reference numeral 35 places, so that the direction of the flow of refrigerant by refrigerant loop is reverse, so that adapt to heat pump configurations and application.When refrigeration system 20 was operated under refrigerating mode, four-way change-over valve 35 was directed to condenser 24 with cold-producing medium from compressor 22.When refrigeration system 20 was operated under heating mode, cross valve 35 was directed to evaporimeter 28(with cold-producing medium under heating mode from compressor 22, and it serves as condenser).
Fig. 2 illustrates the part of evaporimeter 30.Evaporimeter 30 comprises manifold 34.In one example, manifold 34 is inlet manifold or intermediate manifold of evaporimeter 30.In following example, the inlet manifold of evaporimeter 30 has been described.In one example, evaporimeter 30 is micro-channel heat exchangers.
Yet feature of the present invention can extend to the heat exchanger of other type, such as pipe and plate-fin heat exchanger, and extends to other application, such as condenser and heat exchanger again.In addition, though will come open the present invention with reference to the manifold 34 of evaporimeter 30, the intermediate manifold of condenser 24 also within the scope of the invention.Condenser 24 also can be a micro-channel heat exchanger.In addition, though will disclose benefit of the present invention with reference to the two-phase system refrigerant flow by evaporimeter 30, the mixture of single-phase refrigerant stream and cold-producing medium and oil also also can be benefited from the present invention in this scope.
Import refrigerant tubing 28 is communicated with distribution insert 32 fluids that are received within manifold 34 inside, and it provides refrigerant flowpath along longitudinal axis X.Distribute insert 32 and be communicated with a plurality of heat exchanger tubes 36 fluids that manifold 34 is vertically located substantially.Import refrigerant tubing 28 can be located in the end of manifold 34, the centre of manifold 34 or any centre position between it, and can have to the single or multiple connections that distribute insert 32.Each heat exchanger tube 36 can be a flat tube, and can have and be used for a plurality of ports that cold-producing medium flows through.In one example, each port has the hydraulic diameter less than 1 mm.
A plurality of thermofins 38 can be set between heat exchanger tube 36 and it is attached to heat exchanger tube 36 rigidly to strengthen external heat transfer and to be that evaporimeter 30 provides structural rigidity.In one example, a plurality of thermofins 38 are attached to heat exchanger tube 36 by smelting furnace brazing technology.
Distribute insert 32 to comprise that a plurality of cold-producing medium dispensing aperture 42 are to provide from the internal cavity 50 that distributes insert 32 refrigerant path to manifold 34.Dispensing aperture 42 can have Any shape.For example, dispensing aperture 42 can have round-shaped, rectangular shape, elliptical shape or any other suitable shape.
Distribute insert 32 to receive the two-phase system cryogens and send cold-producing medium by a plurality of dispensing aperture 42 equably and enter the manifold 34 so that be assigned in the heat exchanger tube 36 from import refrigerant pipe 28.Usually, distribute the relatively little size of insert 32 to be provided for the remarkable momentum of flow of refrigerant, prevent being separated or promoting year (annual) (opposite) flow of refrigerant pattern of two-phase system cryogen with layering.
Fig. 3 illustrates various design characteristicses, such as diameter, length, position and other size of the parts of evaporimeter 30.Evaporimeter 30 designed to be used best cold-producing medium and distributes.Select to distribute at least one design characteristics of insert 32.Basic design relation between another design characteristics of at least one at least one design characteristics of distribution insert 32 and distribution insert 32, manifold 34 and the heat exchanger tube 36 is determined and defines design parameter.If design parameter drops in the scope of predetermined value, then this indication evaporimeter 30 best cold-producing medium of designeding to be used heat exchanger tube 36 distributes, and prevents or reduce cold-producing medium maldistribution between the heat exchanger tube 36 significantly.
In one example, described basic design relation is first design characteristics and the ratio of second design characteristics, that is to say that first design characteristics is divided by second design characteristics.If the dimensionless design parameter that is limited by basic design relation drops in the given preset range, then realize the optimum efficiency of the distribution of cold-producing medium in distributing insert 32.In first design characteristics and second design characteristics at least one is associated with distributing insert 32.
The various characteristics of following qualification evaporimeter 30:
D ins The internal diameter that distributes insert 32
D man The internal diameter of manifold 34
D orifice The hydraulic diameter of distributing the dispensing aperture 42 of insert 32
D tube The hydraulic diameter of heat exchanger tube 36
L ins The length of distributing insert 32
L man The length of manifold 34
L orifice Axially spaced-apart between the center of the dispensing aperture 42 of distribution insert 32
A insert,surf The exterior surface area of distributing insert 32
A insert,cross Distribute the cross-sectional area of insert 32, it is in perpendicular to the plane of axis X and based on diameter D ins
A orifice The total cross-sectional area that distributes all dispensing aperture 42 of insert 32
A man,dia The cross-sectional area of manifold 34, it is in perpendicular to the plane of axis X and based on diameter D man
A man,long The cross-sectional area of manifold 34, it is in the plane of longitudinal axis X
M The number of heat exchanger tube 36
N The number of dispensing aperture 42
By within the relation/ratio of following qualification, adopting these design characteristicses, can limit a plurality of dimensionless design parameters.The tabulation of the desired predetermined scope of these design parameters of following qualification and value thereof:
The relation numbering Relation Lower limit The upper limit
1 (D ins/D man) 2 0.02 0.95
2 A orifice/A insert,surf 50 5000
3 A orifice/A insert,cross 0.01 100
4 D orifice/L orifice 0.01 35
5 (D orifice 2/A insert,surf)/(D tube 2/A man,long) 0.01 25
6 [(N×D orifice) 2]/[(M×D tube) 2] 0.1 100
7 (D man/D orifice 2)/(L ins/D ins 2) 0.01 20
8 D man/L ins 1 1000
Use to concern 1, the characteristic of distributing insert 32 is the inside diameter D of distributing insert 32 InsDescribed relation is restricted to the inside diameter D of distributing insert 32 InsInside diameter D with manifold 34 ManRatio, then should be than being asked square to limit the dimensionless design parameter.Mobile momentum when this dimensionless design parameter represents to distribute the mobile momentum contrast in the insert 32 not distribute insert 32 in the manifold 34.In order to obtain optimum performance, the value of this design parameter should be in 0.02 to 0.95 scope.
Use to concern 2, the characteristic of distributing insert 32 is to distribute total cross-sectional area A of all dispensing aperture 42 of insert 32 OrificeWith the exterior surface area A that distributes insert 32 Insert, surfDescribed relation is restricted to total cross-sectional area A of all dispensing aperture 42 of distributing insert 32 OrificeWith the exterior surface area A that distributes insert 32 Insert, surfRatio, it limits dimensionless design parameter.This dimensionless design parameter represents to distribute the density of the dispensing aperture 42 of insert 32.In order to obtain optimum performance, the value of this design parameter should be in 50 to 5000 scope.
Use to concern 3, the characteristic of distributing insert 32 is to distribute total cross-sectional area A of all dispensing aperture 42 of insert 32 OrificeWith the cross-sectional area A that distributes insert 32 Insert, cross(it is in the plane vertical with axis X and based on diameter).This relation is restricted to total cross-sectional area A of all dispensing aperture 42 of distributing insert 32 OrificeWith the cross-sectional area A that distributes insert 32 Insert, cross(it is in the plane vertical with axis X and based on diameter D Ins) the ratio.This dimensionless design parameter represents to pass through by the mobile momentum contrast of the dispensing aperture 42 of distributing insert 32 the mobile momentum of distribution insert 32.In order to obtain optimum performance, the value of this design parameter should be in 0.01 to 100 scope.
Use to concern 4, the characteristic of distributing insert 32 is to distribute the hydraulic diameter D of the dispensing aperture 42 of insert 32 OrificeAnd the axially spaced-apart L between the center of the dispensing aperture 42 of distribution insert 32 OrificeThis relation is restricted to the hydraulic diameter D of the dispensing aperture 42 of distributing insert 32 OrificeAnd the axial distance L between the center of the dispensing aperture 42 of distribution insert 32 OrificeRatio, it limits dimensionless design parameter.This dimensionless design parameter represents to distribute the density of the dispensing aperture 42 of insert 32.In order to obtain optimum performance, the value of this design parameter should be in 0.01 to 35 scope.
Use to concern 5, the characteristic of distributing insert 32 is to distribute the hydraulic diameter D of the dispensing aperture 42 of insert 32 OrificeWith the exterior surface area A that distributes insert 32 Insert, surfDescribed relation is restricted to the ratio of first design characteristics and second design characteristics.First design characteristics is restricted to the hydraulic diameter D of the dispensing aperture 42 of distributing insert 32 OrificeSquare divided by the exterior surface area A that distributes insert 32 Insert, surfSecond design characteristics is restricted to the hydraulic diameter D of heat exchanger tube 36 TubeSquare cross-sectional area A divided by manifold 34 Man, long(it is in the plane of longitudinal axis X).First design characteristics is determined the dimensionless design parameter with the ratio of second design characteristics.This dimensionless design parameter represents to pass through by the mobile momentum contrast of heat exchanger tube 36 the mobile momentum of dispensing aperture 42.In order to obtain optimum performance, the value of this design parameter should be in 0.01 to 25 scope.
Use to concern 6, the characteristic of distributing insert 32 is to distribute the hydraulic diameter D of the dispensing aperture 42 of insert 32 OrificeNumber N with dispensing aperture 42.Described relation is restricted to the ratio of first design characteristics and second design characteristics.The number N that first design characteristics is restricted to dispensing aperture 42 multiply by the hydraulic diameter D of the dispensing aperture 42 of distributing insert 32 OrificeAsk then square.The number M that second design characteristics is restricted to heat exchanger tube 36 multiply by the hydraulic diameter D of heat exchanger tube 36 TubeAsk then square.First design characteristics limits the dimensionless design parameter with the ratio of second design characteristics.This design parameter represents to pass through by the mobile momentum contrast of heat exchanger tube 36 the mobile momentum of dispensing aperture 42.In order to obtain optimum performance, the value of this design parameter should be in 0.01 to 100 scope.
Use to concern 7, the characteristic of distributing insert 32 is to distribute the hydraulic diameter D of the dispensing aperture 42 of insert 32 Orifice, the length L of distributing insert 32 Ins, and the inside diameter D of distributing insert 32 InsDescribed relation is restricted to the ratio of first design characteristics and second design characteristics.First design characteristics is restricted to the inside diameter D of manifold 34 ManHydraulic diameter D divided by the dispensing aperture 42 of distributing insert 32 OrificeSquare.Second design characteristics is by the length L of distributing insert 32 InsDivided by the inside diameter D of distributing insert 32 InsSquare limit.First design characteristics divided by second design characteristics to obtain described ratio.First design characteristics is determined the dimensionless design parameter with the ratio of second design characteristics.This dimensionless design parameter represents that the pressure reduction on the manifold 34 contrasts the pressure reduction along manifold 34.In order to obtain optimum performance, the value of this design parameter should be in 0.01 to 20 scope.
Use to concern 8, the characteristic of distributing insert 32 is the length L of distributing insert 32 InsThis relation is restricted to the inside diameter D of manifold 34 ManDivided by the length L of distributing insert 32 Ins, it limits the dimensionless design parameter.This dimensionless design parameter represent to compare with the distance of passing manifold 34 along the travel distance that distributes insert 32.In order to obtain optimum performance, the value of this design parameter should be in 1 to 1000 scope.
Distribute at least one basic design characteristics of insert 32 to come calculated relationship or ratio by adopting, whether and whether the calculated value of determining the dimensionless design parameter limited drop in the scope of predetermined value, can determine to distribute the distribution effects of insert 32 and evaporimeter 30 to be optimised.
Above stated specification only is the example of principle of the present invention.According to above instruction, many modifications and changes of the present invention possible.Yet, disclose the preferred embodiments of the present invention, thereby those of ordinary skills will be appreciated that certain modification will be within the scope of the invention.Therefore, be understood that within the scope of the appended claims that the mode that can describe especially by being different from is implemented the present invention.For this reason, should study claims to determine true scope of the present invention and content.

Claims (25)

1. heat exchanger comprises:
A plurality of heat exchanger tubes;
Manifold; And
Be received within the distribution insert in the described manifold at least in part, wherein, described distribution insert comprises a plurality of apertures, and described a plurality of apertures can distribute a fluid in the described manifold so that be assigned in described a plurality of heat exchanger tube,
Wherein, another design characteristics of at least one at least one design characteristics of described distribution insert and described distribution insert, described manifold and the described a plurality of heat exchanger tube is used to determine basic design relation, and described basic design relation limits design parameter, and described design parameter has the value in the scope that drops on definite value.
2. heat exchanger as claimed in claim 1, wherein, described heat exchanger is an evaporimeter, and described manifold is the inlet manifold of described evaporimeter and at least one in the intermediate manifold.
3. heat exchanger as claimed in claim 1, wherein, described heat exchanger is condenser or heat exchanger again, and described manifold is the intermediate manifold of described condenser or described heat exchanger again.
4. heat exchanger tube as claimed in claim 1, wherein, described heat exchanger is a micro-channel heat exchanger.
5. heat exchanger as claimed in claim 1, wherein, described basic design relation is the dimensionless ratio.
6. heat exchanger as claimed in claim 1, wherein, described at least one design characteristics of described distribution insert is an one of the following: the total cross-sectional area in described a plurality of apertures of the spacing distance between the center in described a plurality of apertures of the diameter of the length of described distribution insert, described distribution insert, the hydraulic diameter in described a plurality of apertures of described distribution insert, described distribution insert, the surface area of described distribution insert, the cross-sectional area of described distribution insert, described distribution insert and the number of described dispensing aperture.
7. heat exchanger as claimed in claim 1, wherein, the internal diameter that the internal diameter that described at least one design characteristics is described distribution insert and described another design characteristics are described manifolds, and described basic design relation is recently limited by the internal diameter of the internal diameter of described distribution insert and described manifold, wherein, described ratio is asked square to limit described design parameter.
8. heat exchanger as claimed in claim 7, wherein, the scope of value that is used for described design parameter is between 0.02 to 0.95.
9. heat exchanger as claimed in claim 1, wherein, described another design characteristics is the characteristic of described distribution insert, and the total cross-sectional area of described a plurality of dispensing aperture that described at least one design characteristics is described distribution insert and the exterior surface area of described distribution insert, and described basic design relation is recently limited by the exterior surface area of total cross-sectional area of described a plurality of dispensing aperture of described distribution insert and described distribution insert, wherein, described than limiting described design parameter.
10. heat exchanger as claimed in claim 9, wherein, the scope of value that is used for described design parameter is between 50 to 5000.
11. heat exchanger as claimed in claim 1, wherein, described another design characteristics is the characteristic of described distribution insert, and the total cross-sectional area of described a plurality of dispensing aperture that described at least one design characteristics is described distribution insert and the cross-sectional area of described distribution insert, and described basic design relation is recently limited by the cross-sectional area of total cross-sectional area of described a plurality of dispensing aperture of described distribution insert and described distribution insert, wherein, described than limiting described design parameter.
12. heat exchanger as claimed in claim 11, wherein, the scope of value that is used for described design parameter is between 0.01 to 100.
13. heat exchanger as claimed in claim 1, wherein, described another design characteristics is the characteristic of described distribution insert, and the interval between the center of the hydraulic diameter of described a plurality of dispensing aperture that described at least one design characteristics is described distribution insert and described a plurality of dispensing aperture of described distribution insert, and described basic design relation is recently limited by the interval between the center of described a plurality of dispensing aperture of the hydraulic diameter of described a plurality of dispensing aperture of described distribution insert and described distribution insert, wherein, described than limiting described design parameter.
14. heat exchanger as claimed in claim 13, wherein, the scope of value that is used for described design parameter is between 0.01 to 35.
15. heat exchanger as claimed in claim 1, wherein, the hydraulic diameter of described a plurality of dispensing aperture that described at least one design characteristics is described distribution insert and the surface area of described distribution insert, described another design characteristics is the hydraulic diameter of described a plurality of heat exchanger tubes and the cross-sectional area of described manifold, and described basic design relation is restricted to first design characteristics divided by second design characteristics
Wherein, the hydraulic diameter of described a plurality of dispensing aperture that described first design characteristics is described distribution insert square with the ratio of the exterior surface area of described distribution insert, and the hydraulic diameter that described second design characteristics is described a plurality of heat exchanger tubes square with the ratio of the cross-sectional area of described manifold, and the ratio of described first design characteristics and described second design characteristics limits described design parameter.
16. heat exchanger as claimed in claim 15, wherein, the scope that is used for the value of described design parameter is 0.01 to 25.
17. heat exchanger as claimed in claim 1, wherein, the number of the hydraulic diameter of described a plurality of dispensing aperture that described at least one design characteristics is described distribution insert and described a plurality of dispensing aperture of described distribution insert, described another design characteristics is the hydraulic diameter of number and described a plurality of heat exchanger tubes of described a plurality of heat exchanger tubes, and described basic design relation is restricted to first design characteristics divided by second design characteristics
Wherein, the hydraulic diameter that described first design characteristics multiply by described a plurality of dispensing aperture of described distribution insert by the number of described a plurality of dispensing aperture of described distribution insert is asked then and square is limited, and the hydraulic diameter that the number that described second design characteristics is described a plurality of heat exchanger tubes multiply by described a plurality of heat exchanger tubes is asked square then, and the ratio of described first design characteristics and described second design characteristics limits described design parameter.
18. heat exchanger as claimed in claim 17, wherein, the scope that is used for the value of described design parameter is 0.01 to 100.
19. heat exchanger as claimed in claim 1, wherein, the internal diameter of the hydraulic diameter that described at least one design characteristics is described a plurality of dispensing aperture of described distribution insert, the length of described distribution insert and described distribution insert, described another design characteristics is the diameter of described manifold, and described basic design relation is restricted to first design characteristics divided by second design characteristics
Wherein, the diameter that described first design characteristics is described manifold divided by the hydraulic diameter of described a plurality of dispensing aperture of described distribution insert square divided by the length of described distribution insert divided by the diameter of described distribution insert square, and the ratio of described first design characteristics and described second design characteristics limits described design parameter.
20. heat exchanger as claimed in claim 19, wherein, the scope that is used for the value of described design parameter is 0.01 to 20.
21. heat exchanger as claimed in claim 1, wherein, described at least one design characteristics is the length of described distribution insert, described another design characteristics is the internal diameter of described manifold, and described basic design relation is restricted to the internal diameter of described manifold and the ratio of the length of described distribution insert, wherein, described than limiting described design parameter.
22. heat exchanger as claimed in claim 21, wherein, the scope that is used for the value of described design parameter is 1 to 1000.
23. a method that designs heat exchanger, described method comprises step:
The scope of determined value;
Select to distribute at least one design characteristics of insert, wherein, described distribution insert comprises a plurality of apertures, at least a portion of described distribution insert is received within the manifold, and fluid can be transmitted through described a plurality of aperture and enters in the described manifold so that be assigned in a plurality of heat exchanger tubes; And
Determine the basic design relation between described at least one design characteristics of described distribution insert and at least one another design characteristics in described distribution insert, described manifold and the described a plurality of heat exchanger tube, wherein, described basic design relation limits design parameter, and described design parameter has the value in the scope that drops on described value.
24. method as claimed in claim 23, wherein, described basic design relation is the dimensionless ratio.
25. method as claimed in claim 23, wherein, described at least one design characteristics of described distribution insert is an one of the following: the total cross-sectional area in described a plurality of apertures of the spacing distance between the center in described a plurality of apertures of the diameter of the length of described distribution insert, described distribution insert, the hydraulic diameter in described a plurality of apertures of described distribution insert, described distribution insert, the surface area of described distribution insert, the cross-sectional area of described distribution insert, described distribution insert and the number of described dispensing aperture.
CN2009801267159A 2008-07-10 2009-06-12 Design characteristics for heat exchanger distribution insert Pending CN102089612A (en)

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US61/079521 2008-07-10
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EP2310790A2 (en) 2011-04-20
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EP2310790A4 (en) 2014-10-08
WO2010005676A3 (en) 2010-03-25

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