CN108627044A - One kind being used for supercritical carbon dioxide regenerator variable cross-section airfoil type high efficient heat exchanging channel design method - Google Patents
One kind being used for supercritical carbon dioxide regenerator variable cross-section airfoil type high efficient heat exchanging channel design method Download PDFInfo
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- CN108627044A CN108627044A CN201810725800.8A CN201810725800A CN108627044A CN 108627044 A CN108627044 A CN 108627044A CN 201810725800 A CN201810725800 A CN 201810725800A CN 108627044 A CN108627044 A CN 108627044A
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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
- F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
- F28F13/02—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by influencing fluid boundary
Abstract
One kind being suitable for supercritical CO2Regenerator variable cross-section airfoil type high efficient heat exchanging channel design method, non-homogeneous variable cross-section airfoil type high efficient heat exchanging channel forms cell cube by a certain specific airfoil type line, θ forms expanding to several airfoil type cell cube streamwises at a certain angle or the change flow section of shrinkage type is arranged, so that the flow velocity in each section of streamwise is as consistent as possible, reduce flow resistance, it for the fluid of cold fluid, is arranged using expansion, θ is less than 90 degree；It for the fluid of hot fluid, is arranged using shrinking, θ is more than 90 degree, can destroy flow boundary layer by using existing wing molded line, while reducing flow resistance, promote the general flow heat transfer property of heat exchanger channels；Changed by the difference for cold fluid and hot fluid streamwise density, targetedly using expansion or the nonuniform mutation operator mode of shrinkage type, so that flowing streamwise is flowed close to constant speed, flow resistance is further decreased, best flowing heat transfer comprehensive performance is reached.
Description
Technical field
The present invention relates to high-efficiency compact heat exchanger technical fields, more particularly to a kind of to be used for supercritical carbon dioxide backheat
Device variable cross-section airfoil type high efficient heat exchanging channel design method.
Background technology
Supercritical carbon dioxide cycle generating system can realize higher circulating generation effect under lower endothermic temperature
Rate, and equipment size is far smaller than the steam unit of same parameter, Technical Economy is fine.Supercritical carbon dioxide circulating generation system
System has a large amount of waste heat 3~4 times of generated energy (about) to need to reduce using efficient low-resistance compact heat exchanger and be produced into
This, reduces equipment volume, meets actual demands of engineering.Such as use the print of diffusion bonding Welding (diffusion bonding)
Brush circuit heat exchanger (Printed circuit heat exchanger, PCHE), it is straight that PCHE mostly uses 1~2mm equivalent hydraufics
The complicated microchannel of diameter achievees the effect that augmentation of heat transfer to realize under the conditions of low flow resistance.
Traditional supercritical fluid heat transmission equipment is mostly that unilateral side is overcritical working medium.And supercritical CO2It is cold and hot in regenerator
Both sides working medium is supercritical fluid, is interactional between two different pressures and the varied property pair supercritical fluids of temperature
Diabatic process.The cold and hot supercritical CO in regenerator runner both sides2Density, specific heat capacity and viscosity all constantly variation, cold fluid and hot fluid stream
The heat flow density of different zones also shows nonlinear variation between road, heats and phase different with the heat-transfer character in coolant flow channel
It mutually influences, especially because the density of both sides working medium and specific heat capacity difference are larger, easily occurs temperature folder point effect inside runner
The problems such as (since the cold fluid and hot fluid temperature difference is close to infinitely small, heat transfer is caused to be failed) is answered, to influence the safe operation of system.At present
It is insufficient to the understanding of this Coupled Heat Transfer rule, lack rational computational methods, existing regenerator heat exchanger channels do not have nearly all
There are consideration These characteristics, design deviation larger.
Invention content
In order to overcome the above-mentioned deficiencies of the prior art, the purpose of the present invention is to provide one kind being used for supercritical carbon dioxide
Regenerator variable cross-section airfoil type high efficient heat exchanging channel design method is more increased so that regenerator design is more accurate
The general flow heat-transfer character of effect is used for supercritical carbon dioxide regenerator variable cross-section airfoil type high efficient heat exchanging channel design side
Method.
To achieve the goals above, the technical solution adopted by the present invention is：
One kind being used for supercritical carbon dioxide regenerator variable cross-section airfoil type high efficient heat exchanging channel design method, by airfoil type
Line forms cell cube, and θ forms the unsteady flow of expanding or shrinkage type to several airfoil type cell cube streamwises at a certain angle
Dynamic sectional area arrangement so that the flow velocity in each section of streamwise is consistent, and reduces flow resistance, to more be increased
The general flow heat-transfer character of effect.
When the fluid streamwise is heated, streamwise forms expanding and becomes flow section arrangement, expansion
Angle θ is less than 90 degree, is designed for principle with ensureing that the mean flow rate in each section of streamwise is almost the same.
The cooled situation of the fluid streamwise, streamwise form shrinkage type and become flow section arrangement,
Angle of throat θ is more than 90 degree, and ensures that the mean flow rate in each section of streamwise is almost the same and be designed for principle.
Beneficial effects of the present invention：
Flow boundary layer can be destroyed by using existing wing molded line, while reducing flow resistance, promotes heat exchanger channels
General flow heat transfer property；
Changed by the difference for cold fluid and hot fluid streamwise density, targetedly using expansion or shrinkage type
Nonuniform mutation operator mode so that flowing streamwise is flowed close to constant speed, is reduced flow resistance, is reached best flowing heat transfer
Comprehensive performance.
All in all, by the above innovative approach, cold and hot heat exchanger channels can be made according to supercritical CO2The variation of physical property
Special designing is carried out, so that regenerator design is more accurate, obtains more efficient general flow heat transfer property.
Description of the drawings
Fig. 1 variable cross-section airfoil type high efficient heat exchangings channel.
Specific implementation mode
Invention is further described in detail below in conjunction with the accompanying drawings.
It is a kind of supercritical CO as shown in Figure 12The non-homogeneous variable cross-section airfoil type high efficient heat exchanging channel that regenerator uses.
The variable cross-section airfoil type high efficient heat exchanging channel forms cell cube by a certain specific airfoil type line, several machines
θ forms expanding to aerofoil profile cell cube streamwise at a certain angle or the change flow section of shrinkage type is arranged.
A kind of supercritical CO2The non-homogeneous variable cross-section airfoil type high efficient heat exchanging channel that regenerator uses, for stream
The case where body streamwise is heated, streamwise form expanding and become flow section arrangement, and angle of flare θ is less than 90 degree.
A kind of supercritical CO2The non-homogeneous variable cross-section airfoil type high efficient heat exchanging channel that regenerator uses, for stream
The cooled situation of body streamwise, streamwise form shrinkage type and become flow section arrangement, and angle of throat θ is more than 90 degree.
The operation principle of the present invention：
New cold and hot heat exchanger channels are according to supercritical CO2The variation of physical property carries out special designing, so that regenerator is set
Meter is more accurate, obtains more efficient general flow heat-transfer character.Non-homogeneous variable cross-section airfoil type high efficient heat exchanging channel is by certain
A kind of specific airfoil type line formation cell cube, θ forms expansion to several airfoil type cell cube streamwises at a certain angle
The change flow section of type or shrinkage type is arranged so that the flow velocity in each section of streamwise is as consistent as possible, reduces flowing
Resistance.It for the fluid of cold fluid (by heating), is arranged using expansion, θ is less than 90 degree；For the stream of hot fluid (cooled)
Body is arranged using shrinking.θ is more than 90 degree.Specific angle carries out special designing determination according to different design conditions.By using
Existing wing molded line can destroy flow boundary layer, while reduce flow resistance, promote the general flow conductivity of heat of heat exchanger channels
Energy；By for cold fluid and hot fluid streamwise density difference change, targetedly using expansion or shrinkage type it is non-
Even arrangement so that flowing streamwise is flowed close to constant speed, further decreases flow resistance, and the flowing for reaching best passes
Hot comprehensive performance.
Claims (3)
1. a kind of supercritical CO2Regenerator uses the design method in variable cross-section airfoil type high efficient heat exchanging channel, which is characterized in that by
Airfoil type line forms cell cube, and θ forms expanding or shrinkage type to several airfoil type cell cube streamwises at a certain angle
Change flow section arrangement so that the flow velocity in each section of streamwise is consistent.
2. a kind of supercritical CO according to claim 12Regenerator uses the design in variable cross-section airfoil type high efficient heat exchanging channel
Method, it is characterised in that：When the fluid streamwise is heated, streamwise forms expanding and becomes flow section cloth
It sets, angle of flare θ is less than 90 degree, is designed for principle with ensureing that the mean flow rate in each section of streamwise is almost the same.
3. a kind of supercritical CO according to claim 12Regenerator uses the design in variable cross-section airfoil type high efficient heat exchanging channel
Method, it is characterised in that：When the fluid streamwise is cooled, streamwise forms shrinkage type and becomes flow section cloth
It sets, angle of throat θ is more than 90 degree, and ensures that the mean flow rate in each section of streamwise is almost the same and be designed for principle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810725800.8A CN108627044A (en) | 2018-07-04 | 2018-07-04 | One kind being used for supercritical carbon dioxide regenerator variable cross-section airfoil type high efficient heat exchanging channel design method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810725800.8A CN108627044A (en) | 2018-07-04 | 2018-07-04 | One kind being used for supercritical carbon dioxide regenerator variable cross-section airfoil type high efficient heat exchanging channel design method |
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| CN108627044A true CN108627044A (en) | 2018-10-09 |
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| CN201810725800.8A Pending CN108627044A (en) | 2018-07-04 | 2018-07-04 | One kind being used for supercritical carbon dioxide regenerator variable cross-section airfoil type high efficient heat exchanging channel design method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112228905A (en) * | 2020-10-13 | 2021-01-15 | 西北工业大学 | Channel structure capable of restraining flow distribution deviation of supercritical fluid |
Citations (7)
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| JP2001041677A (en) * | 1999-08-03 | 2001-02-16 | Mitsubishi Heavy Ind Ltd | Heat exchanger |
| WO2001079775A1 (en) * | 2000-04-13 | 2001-10-25 | Tetsuto Tamura | Rapid cooling device and method of rapidly cooling the device |
| US6318455B1 (en) * | 1999-07-14 | 2001-11-20 | Mitsubishi Heavy Industries, Ltd. | Heat exchanger |
| EP1870655A2 (en) * | 2006-06-24 | 2007-12-26 | Pierburg GmbH | Heat exchanger unit for a combustion engine |
| CN101532798A (en) * | 2009-03-31 | 2009-09-16 | 华北电力大学 | Reinforced heat transfer element of truncated cylindrical surface wing type vortex generator |
| CN102112843A (en) * | 2008-08-02 | 2011-06-29 | 皮尔伯格有限责任公司 | Heat transfer unit for internal combustion engine |
| CN208780012U (en) * | 2018-07-04 | 2019-04-23 | 西安热工研究院有限公司 | One kind being used for supercritical carbon dioxide regenerator variable cross-section airfoil type high efficient heat exchanging channel |
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2018
- 2018-07-04 CN CN201810725800.8A patent/CN108627044A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6318455B1 (en) * | 1999-07-14 | 2001-11-20 | Mitsubishi Heavy Industries, Ltd. | Heat exchanger |
| JP2001041677A (en) * | 1999-08-03 | 2001-02-16 | Mitsubishi Heavy Ind Ltd | Heat exchanger |
| WO2001079775A1 (en) * | 2000-04-13 | 2001-10-25 | Tetsuto Tamura | Rapid cooling device and method of rapidly cooling the device |
| EP1870655A2 (en) * | 2006-06-24 | 2007-12-26 | Pierburg GmbH | Heat exchanger unit for a combustion engine |
| CN102112843A (en) * | 2008-08-02 | 2011-06-29 | 皮尔伯格有限责任公司 | Heat transfer unit for internal combustion engine |
| CN101532798A (en) * | 2009-03-31 | 2009-09-16 | 华北电力大学 | Reinforced heat transfer element of truncated cylindrical surface wing type vortex generator |
| CN208780012U (en) * | 2018-07-04 | 2019-04-23 | 西安热工研究院有限公司 | One kind being used for supercritical carbon dioxide regenerator variable cross-section airfoil type high efficient heat exchanging channel |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112228905A (en) * | 2020-10-13 | 2021-01-15 | 西北工业大学 | Channel structure capable of restraining flow distribution deviation of supercritical fluid |
| CN112228905B (en) * | 2020-10-13 | 2022-01-21 | 西北工业大学 | Channel structure capable of restraining flow distribution deviation of supercritical fluid |
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