CN107144158A - A kind of compact heat exchanger of supercritical carbon dioxide and water heat exchange - Google Patents
A kind of compact heat exchanger of supercritical carbon dioxide and water heat exchange Download PDFInfo
- Publication number
- CN107144158A CN107144158A CN201710454446.5A CN201710454446A CN107144158A CN 107144158 A CN107144158 A CN 107144158A CN 201710454446 A CN201710454446 A CN 201710454446A CN 107144158 A CN107144158 A CN 107144158A
- Authority
- CN
- China
- Prior art keywords
- cold side
- section
- hot
- side channel
- cold
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 62
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 31
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 17
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 title abstract description 8
- 239000000758 substrate Substances 0.000 claims abstract description 8
- 230000002411 adverse Effects 0.000 claims description 12
- 238000010992 reflux Methods 0.000 claims description 6
- 239000000498 cooling water Substances 0.000 abstract description 12
- 238000012546 transfer Methods 0.000 abstract description 9
- 230000000704 physical effect Effects 0.000 abstract description 5
- 239000007788 liquid Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 5
- 230000005611 electricity Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241000790917 Dioxys <bee> Species 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000009510 drug design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D9/0081—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by a single plate-like element ; the conduits for one heat-exchange medium being integrated in one single plate-like element
-
- 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
Landscapes
- 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
The invention discloses the compact heat exchanger that a kind of supercritical carbon dioxide and water exchange heat, including substrate and and some hot side flat boards and some cold side flat boards on substrate, wherein, each cold side flat board and each hot side flat board are interspersed successively from top to bottom, wherein, some hot-side channels are offered on the bottom surface of hot side flat board, some cold side channels are offered on the bottom surface of cold side flat board, wherein, the area sum of all cold side channel cross sections is the 1/3 of the area sum of all hot-side channel cross sections, the heat exchanger can effectively solve the problems, such as the flow matches that cold and hot side liquid physical property huge difference is brought in supercritical carbon dioxide Brayton cycle forecooler, and reduce the flow of recirculated cooling water in the case of ensure that the coefficient of heat transfer.
Description
Technical field
The invention belongs to technical field of heat exchange, it is related to the compact heat exchanger of a kind of supercritical carbon dioxide and water heat exchange.
Background technology
Supercritical carbon dioxide Brayton cycle is one of most potential advanced power cycle generally acknowledged at present.Due to super
Critical carbon dioxide has the features such as energy density is big, heat transfer efficiency is high, supercritical carbon dioxide Brayton cycle efficiency power generation
System can reach the efficiency of 700 DEG C of conventional steam Rankine cycle in 620 DEG C of temperature ranges, it is not necessary to new height of redeveloping
Temperature alloy, and equipment size is less than the steam unit of same parameter, application prospect is very good.
At present, in supercritical carbon dioxide Brayton cycle electricity generation system, printed circuit sheet heat exchanger is generally considered
It is most suitably used heat exchanger.Printed circuit sheet heat exchanger is a kind of new and effective compact heat exchanger, will be alternately arranged
Runner on the heat exchanger that hot and cold side flat board is welded together by way of diffusion welding (DW), its hot and cold side heat exchange flat board is logical
Cross the thin channel that method for chemially etching is obtained.Under conditions of identical heat exchange amount, the size of printed circuit sheet heat exchanger only has
The 1/5-1/10 of traditional shell-and-tube heat exchanger size.Therefore, printed circuit sheet heat exchanger can be very good to be used as overcritical dioxy
Change the regenerator and forecooler of carbon Bretton cycle generating system.
In the forecooler of supercritical carbon dioxide Brayton cycle electricity generation system, the supercritical carbon dioxide work of hot side
Near pseudo-critical temperature point (i.e. the large specific heat region of supercritical fluid), and the water of cold side was then in cold-zone, hot side working medium and
The specific heat at constant pressure difference of cold side working medium is very big.If still using the printed circuit board (PCB) of traditional counterflow configuration or parallel flow configuration
As forecooler cold side flow area phenomenon bigger than normal then occurs so that recirculated cooling water may operate in laminar flow in heat exchanger
Area, causes the coefficient of heat transfer relatively low.Therefore, it is necessary to take into full account in supercritical carbon dioxide Brayton cycle electricity generation system forecooler
Supercritical carbon dioxide and cooling water physical property feature under running conditions, the runner of rational design heat exchanger, it is to avoid should
The appearance of problem.
But through investigation, rarely have open achievement and patent introduction to be related to for supercritical carbon dioxide cloth both at home and abroad at present
Supercritical carbon dioxide and the printed circuit board (PCB) forecooler of water heat exchange in thunder cycle generating system.And printed circuit sheet heat exchanger
During as forecooler, if design is improper, the circulating cooling water needed for occurring is excessive or the forecooler coefficient of heat transfer is relatively low
Situations such as.
The content of the invention
It is an object of the invention to overcome the shortcoming of above-mentioned prior art to be changed there is provided a kind of supercritical carbon dioxide and water
The compact heat exchanger of heat, the heat exchanger can effectively solve cold and hot side in supercritical carbon dioxide Brayton cycle forecooler
The flow matches problem that physical properties of fluids huge difference is brought, and reduce recirculated cooling water in the case of ensure that the coefficient of heat transfer
Flow.
To reach above-mentioned purpose, the compact heat exchanger of supercritical carbon dioxide and water heat exchange of the present invention includes base
Plate and and some hot side flat boards and some cold side flat boards on substrate, wherein, each cold side flat board and each hot side flat board from
Top to bottm is interspersed successively, wherein, offer and opened on some hot-side channels, the bottom surface of cold side flat board on the bottom surface of hot side flat board
Provided with some cold side channels, wherein, the area sum of all cold side channel cross sections is the area of all hot-side channel cross sections
The 1/3 of sum.
The from left to right parallel distribution successively of each hot-side channel, and each hot-side channel is linear structure.
Each cold side channel is in broken line type and equidistantly distributed, and each cold side channel enters including being sequentially connected logical cold side
Mouth, cold side input port Drainage Section, low temperature adverse current section cold side channel, the first distributary section cold side channel, following current section cold side channel, the second fork
Stream section cold side channel, cold side outlet port collect section and hot side outlet.
Cold side input port Drainage Section and the second distributary section cold side channel are located at cold side flat board and are located at front side, the first distributary section cold side
Passage and cold side outlet port collect the rear side that section is located at cold side flat board, low temperature adverse current section cold side channel, following current section cold side channel and height
The linear type distribution of warm adverse current section cold side channel.
The cross section of each hot-side channel and the cross section of each cold side channel are semicircular structure.
The quantity of hot-side channel is inverse for the quantity, the quantity of following current section cold side channel and high temperature of low temperature adverse current section cold side channel
Flow the quantity sum of section cold side channel.
The invention has the advantages that：
The compact heat exchanger of supercritical carbon dioxide and water heat exchange of the present invention uses printed circuit sheet heat exchanger
Structure type, i.e., be staggered including substrate and successively on the substrate some hot side flat boards and some cold sides put down
Plate, while inclined for the cold side circulation area for avoiding the printed circuit sheet heat exchanger of conventional counter-current structure or parallel flow configuration from occurring
Greatly, the area sum of each cold side channel cross section is each hot-side channel cross section in the problem of coefficient of heat transfer is relatively low, the present invention
The 1/3 of area sum, so as to effectively avoid recirculated cooling water from working in laminar region, it is ensured that the enough heat convection systems of heat exchanger
Number, while the on-way resistance increase of cooling water is less, and the small volume of heat exchanger, the consumption of recirculated cooling water is less, from
And effectively solve the flow that cold and hot side liquid physical property huge difference is brought in supercritical carbon dioxide Brayton cycle forecooler
Matching problem.
Brief description of the drawings
Fig. 1 is sectional view of the invention；
Fig. 2 is the top view of hot side flat board 1 in the present invention；
Fig. 3 is the top view of cold side flat board 2 in the present invention.
Wherein, 1 it is hot side flat board, 2 be cold side flat board, 3 be hot side entrance, 4 be hot-side channel, 5 is that cold side outlet port collects
Section, 6 be cold side outlet port, 7 be cold side input port Drainage Section, 8 be low temperature adverse current section cold side channel, 9 be the first distributary section cold side channel,
10 be following current section cold side channel, 11 be the second distributary section cold side channel, 12 be high-temperature reflux section cold side channel.
Embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings：
With reference to Fig. 1, the compact heat exchanger of supercritical carbon dioxide and water heat exchange of the present invention include substrate and with
And some hot side flat boards 1 and some cold side flat boards 2 on substrate, wherein, each cold side flat board 2 and each hot side flat board 1 are from upper
It is interspersed successively under, wherein, offered on the bottom surface of hot side flat board 1 on some hot-side channels 4, the bottom surface of cold side flat board 2
Some cold side channels are offered, wherein, the area sum of all cold side channel cross sections is the face of all cross sections of hot-side channel 4
The 1/3 of product sum.
The from left to right parallel distribution successively of each hot-side channel 4, and each hot-side channel 4 is linear structure.
Each cold side channel is in broken line type and equidistantly distributed, and each cold side channel includes being sequentially connected logical cold side input port
6th, cold side input port Drainage Section 7, low temperature adverse current section cold side channel 8, the first distributary section cold side channel 9, following current section cold side channel 10, the
Two distributaries section cold side channel 11, cold side outlet port collect section 5 and hot side outlet 3；The distributary section cold side of cold side input port Drainage Section 7 and second
Passage 11 is located at cold side flat board 2 and is located at front side, and the first distributary section cold side channel 9 and cold side outlet port collect section 5 positioned at cold side flat board 2
Rear side, low temperature adverse current section cold side channel 8, following current section cold side channel 10 and high-temperature reflux section cold side channel 12 linear type point
Cloth.
The cross section of each hot-side channel 4 and the cross section of each cold side channel are semicircular structure；The quantity of hot-side channel 4
For the number of the quantity of low temperature adverse current section cold side channel 8, the quantity of following current section cold side channel 10 and high-temperature reflux section cold side channel 12
Measure sum.
Referring to Fig. 1, welded between adjacent hot side flat board 1 and cold side flat board 2 by the technique of diffusion welding (DW)；Hot side flat board
The cold side channel on hot-side channel 4 and cold side flat board 2 on 1 is obtained by method for chemially etching；Hot-side channel 4 and cold side are logical
The passage pitch in road is equal to 1.2-1.4 times of channel diameter, and the thickness of hot side flat board 1 and cold side flat board 2 is channel radius
1.3-1.5 again.
The specific work process of the present invention is as follows：
The left-to-right distribution parallel successively of each hot-side channel 4 on hot side flat board 1, supercritical carbon dioxide is by each hot-side channel
4 hot side entrance enters in each hot-side channel 4, then transfers heat to cold side working medium, then again by the hot side of each hot-side channel 4
Outlet outflow.
The quantity of cold side channel is the 1/3 of the quantity of hot-side channel 4, and recirculated cooling water flows through cold side input port 6, cold side and entered successively
Mouth Drainage Section 7, low temperature adverse current section cold side channel 8, the first distributary section cold side channel 9, following current section cold side channel 10, the second distributary section
Cold side channel 11, high-temperature reflux section cold side channel 12 and cold side outlet port collect section 5, and the most hot side outlet 3 through cold side channel afterwards
Outflow, and carry out heat exchange heating with supercritical carbon dioxide in the process of circulation.
The design principle of the present invention is as follows：
Due to the working characteristics of forecooler in supercritical carbon dioxide Brayton cycle, using conventional counter-current structure or suitable
Cold side flow area phenomenon bigger than normal then occurs as forecooler in the printed circuit sheet heat exchanger of flow structure so that circulation is cold
But water may operate in laminar region, cause the coefficient of heat transfer relatively low.For the problem, the present invention passes through to recirculated cooling water and critical
The physical property and exchange capability of heat of supercritical carbon dioxide are calculated and assessed near temperature spot, are found when the cross section of cold side channel
It when area is the 1/3 of the area of the cross section of hot-side channel 4, can effectively avoid recirculated cooling water from working in laminar region, protect
The enough convection transfer rates of recirculated cooling water are demonstrate,proved, and most on-way resistance will not be increased.
Above-described embodiment, has been carried out further to the purpose of the present invention, technical scheme and beneficial effect
Describe in detail, should be understood that the embodiment that the foregoing is only the present invention, be not limited to this hair
Bright, within the spirit and principles of the invention, any modification, equivalent substitution and improvements done etc. should be included in the present invention
Protection domain within.
Claims (6)
1. a kind of supercritical carbon dioxide and the compact heat exchanger of water heat exchange, it is characterised in that including substrate and positioned at base
Some hot side flat boards (1) and some cold side flat boards (2) on plate, wherein, each cold side flat board (2) and each hot side flat board (1) are from upper
It is interspersed successively under, wherein, some hot-side channels (4) are offered on the bottom surface of hot side flat board (1), cold side flat board (2)
Some cold side channels are offered on bottom surface, wherein, the area sum of all cold side channel cross sections is horizontal for all hot-side channels (4)
The 1/3 of the area sum in section.
2. supercritical carbon dioxide according to claim 1 and the compact heat exchanger of water heat exchange, it is characterised in that each heat
Wing passage (4) from left to right parallel distribution successively, and each hot-side channel (4) is linear structure.
3. supercritical carbon dioxide according to claim 1 and the compact heat exchanger of water heat exchange, it is characterised in that each cold
Wing passage is in broken line type and equidistantly distributed, and each cold side channel includes being sequentially connected logical cold side input port (6), cold side input port
Drainage Section (7), low temperature adverse current section cold side channel (8), the first distributary section cold side channel (9), following current section cold side channel (10), second
Distributary section cold side channel (11), cold side outlet port collect section (5) and hot side outlet (3).
4. supercritical carbon dioxide according to claim 1 and the compact heat exchanger of water heat exchange, it is characterised in that cold side
Entrance Drainage Section (7) and the second distributary section cold side channel (11) are located at cold side flat board (2) and are located at front side, and the first distributary section cold side is led to
Road (9) and cold side outlet port collect the rear side that section (5) is located at cold side flat board (2), low temperature adverse current section cold side channel (8), following current Duan Leng
The linear type distribution of wing passage (10) and high-temperature reflux section cold side channel (12).
5. supercritical carbon dioxide according to claim 1 and the compact heat exchanger of water heat exchange, it is characterised in that each heat
The cross section of wing passage (4) and the cross section of each cold side channel are semicircular structure.
6. supercritical carbon dioxide according to claim 1 and the compact heat exchanger of water heat exchange, it is characterised in that hot side
The quantity of passage (4) is the quantity of low temperature adverse current section cold side channel (8), the quantity and high-temperature reflux of following current section cold side channel (10)
The quantity sum of section cold side channel (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710454446.5A CN107144158B (en) | 2017-06-14 | 2017-06-14 | Compact heat exchanger for heat exchange between supercritical carbon dioxide and water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710454446.5A CN107144158B (en) | 2017-06-14 | 2017-06-14 | Compact heat exchanger for heat exchange between supercritical carbon dioxide and water |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107144158A true CN107144158A (en) | 2017-09-08 |
| CN107144158B CN107144158B (en) | 2024-02-27 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710454446.5A Active CN107144158B (en) | 2017-06-14 | 2017-06-14 | Compact heat exchanger for heat exchange between supercritical carbon dioxide and water |
Country Status (1)
| Country | Link |
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| CN (1) | CN107144158B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107816905A (en) * | 2017-09-25 | 2018-03-20 | 西安热工研究院有限公司 | A kind of high efficiency ultracritical carbon dioxide precooling device of circulating cooling water direct heat-exchange |
| CN108344316A (en) * | 2018-02-09 | 2018-07-31 | 西安热工研究院有限公司 | A kind of high-efficiency compact formula heat exchanger of gas-liquid two-phase carbon dioxide and water heat exchange |
| CN109443043A (en) * | 2018-09-05 | 2019-03-08 | 西安交通大学 | A kind of lead-supercritical carbon dioxide Intermediate Heat Exchanger |
| CN111895822A (en) * | 2020-08-05 | 2020-11-06 | 哈尔滨锅炉厂有限责任公司 | Micro-channel heat exchanger for supercritical carbon dioxide power generation circulation |
| CN114727478A (en) * | 2022-04-27 | 2022-07-08 | 西安热工研究院有限公司 | Printed circuit board heat exchanger flow channel structure suitable for liquid metal and processing method thereof |
| CN115143811A (en) * | 2022-07-01 | 2022-10-04 | 西安交通大学 | For SCO 2 Variable cross-section printed circuit board type heat exchanger for heat exchange at cold end of power cycle |
| CN116013558A (en) * | 2023-01-17 | 2023-04-25 | 中国核动力研究设计院 | Dual super nuclear power system and nuclear energy utilization method |
| CN117470003A (en) * | 2023-12-27 | 2024-01-30 | 中国核动力研究设计院 | Heat exchanger based on thermal cycle pinch point problem is solved and brayton cycle system |
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| CN206832097U (en) * | 2017-06-14 | 2018-01-02 | 西安热工研究院有限公司 | A kind of close-coupled forecooler for supercritical carbon dioxide Brayton cycle |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107816905A (en) * | 2017-09-25 | 2018-03-20 | 西安热工研究院有限公司 | A kind of high efficiency ultracritical carbon dioxide precooling device of circulating cooling water direct heat-exchange |
| CN108344316A (en) * | 2018-02-09 | 2018-07-31 | 西安热工研究院有限公司 | A kind of high-efficiency compact formula heat exchanger of gas-liquid two-phase carbon dioxide and water heat exchange |
| CN108344316B (en) * | 2018-02-09 | 2024-01-30 | 西安热工研究院有限公司 | Efficient compact heat exchanger for heat exchange between gas-liquid two-phase carbon dioxide and water |
| CN109443043A (en) * | 2018-09-05 | 2019-03-08 | 西安交通大学 | A kind of lead-supercritical carbon dioxide Intermediate Heat Exchanger |
| CN109443043B (en) * | 2018-09-05 | 2019-09-27 | 西安交通大学 | A kind of lead-supercritical carbon dioxide Intermediate Heat Exchanger |
| CN111895822A (en) * | 2020-08-05 | 2020-11-06 | 哈尔滨锅炉厂有限责任公司 | Micro-channel heat exchanger for supercritical carbon dioxide power generation circulation |
| CN114727478A (en) * | 2022-04-27 | 2022-07-08 | 西安热工研究院有限公司 | Printed circuit board heat exchanger flow channel structure suitable for liquid metal and processing method thereof |
| CN115143811A (en) * | 2022-07-01 | 2022-10-04 | 西安交通大学 | For SCO 2 Variable cross-section printed circuit board type heat exchanger for heat exchange at cold end of power cycle |
| CN116013558A (en) * | 2023-01-17 | 2023-04-25 | 中国核动力研究设计院 | Dual super nuclear power system and nuclear energy utilization method |
| CN116013558B (en) * | 2023-01-17 | 2024-04-05 | 中国核动力研究设计院 | Dual super nuclear power system and nuclear energy utilization method |
| CN117470003A (en) * | 2023-12-27 | 2024-01-30 | 中国核动力研究设计院 | Heat exchanger based on thermal cycle pinch point problem is solved and brayton cycle system |
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| Publication number | Publication date |
|---|---|
| CN107144158B (en) | 2024-02-27 |
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