CN206832097U - A kind of close-coupled forecooler for supercritical carbon dioxide Brayton cycle - Google Patents
A kind of close-coupled forecooler for supercritical carbon dioxide Brayton cycle Download PDFInfo
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- CN206832097U CN206832097U CN201720690818.XU CN201720690818U CN206832097U CN 206832097 U CN206832097 U CN 206832097U CN 201720690818 U CN201720690818 U CN 201720690818U CN 206832097 U CN206832097 U CN 206832097U
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Abstract
The utility model discloses a kind of close-coupled forecooler for supercritical carbon dioxide Brayton cycle, including substrate and and some hot side flat boards on substrate and some cold side flat boards, 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 cooler 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 it can ensure to reduce the flow of recirculated cooling water in the case of the coefficient of heat transfer.
Description
Technical field
The utility model belongs to technical field of heat exchange, is related to a kind of for the compact of supercritical carbon dioxide Brayton cycle
Formula forecooler.
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 characteristics that 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 cooler.Printed circuit sheet heat exchanger is a kind of new and effective compact heat exchanger, will be alternately arranged
The cooler that hot and cold side flat board is welded together by way of diffusion welding (DW), the runner that its hot and cold side exchanges heat on flat board is logical
Cross the thin channel that method for chemially etching obtains.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 use 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, cause 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 rational runner for designing cooler, avoid this
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, occur that required circulating cooling water is excessive or the forecooler coefficient of heat transfer is relatively low
Situations such as.
Utility model content
The shortcomings that the purpose of this utility model is to overcome above-mentioned prior art, there is provided one kind is used for overcritical titanium dioxide
The close-coupled forecooler of carbon Brayton cycle, the forecooler can effectively solve supercritical carbon dioxide Brayton cycle precooling
The flow matches problem that cold and hot side liquid physical property huge difference is brought in device, and can ensure to reduce in the case of the coefficient of heat transfer
The flow of recirculated cooling water.
To reach above-mentioned purpose, the close-coupled described in the utility model for supercritical carbon dioxide Brayton cycle is pre-
Cooler include substrate and and some hot side flat boards on substrate and some cold side flat boards, wherein, each cold side flat board and each
Hot side flat board is interspersed successively from top to bottom, wherein, some hot-side channels, cold side flat board are offered on the bottom surface of hot side flat board
Bottom surface on offer some cold side channels, wherein, the area sums of all cold side channel cross sections is horizontal for all hot-side channels
The 1/3 of the area sum in section.
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 utility model has the advantages that：
Close-coupled forecooler described in the utility model for supercritical carbon dioxide Brayton cycle is using printing electricity
The structure type of road sheet heat exchanger, if be staggered including substrate and successively in some hot side flat boards on the substrate and
Dry and cold side flat board, while the cold side circulation to avoid the printed circuit sheet heat exchanger of conventional counter-current structure or parallel flow configuration from occurring
The problem of area is bigger than normal, the coefficient of heat transfer is relatively low, the area sum of each cold side channel cross section is led to for each hot side in the utility model
The 1/3 of the area sum of road cross section, so as to effectively avoiding recirculated cooling water from working in laminar region, ensure that cooler is enough
Convection transfer rate, while the on-way resistance increase of cooling water is less, and the small volume of cooler, the use of recirculated cooling water
Measure it is less, so as to effectively solve supercritical carbon dioxide Brayton cycle forecooler in cold and hot side liquid physical property huge difference band
The flow matches problem come.
Brief description of the drawings
Fig. 1 is sectional view of the present utility model；
Fig. 2 is the top view of hot side flat board 1 in the utility model；
Fig. 3 is the top view of cold side flat board 2 in the utility model.
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 it is following current section cold side channel, 11 be the second distributary section cold side channel, 12 is high-temperature reflux section cold side channel.
Embodiment
The utility model is described in further detail below in conjunction with the accompanying drawings：
With reference to figure 1, the close-coupled forecooler bag described in the utility model for supercritical carbon dioxide Brayton cycle
Include substrate and and some hot side flat boards 1 on substrate and some cold side flat boards 2, wherein, each cold side flat board 2 and each hot side
Flat board 1 is interspersed successively from top to bottom, wherein, some hot-side channels 4, cold side flat board 2 are offered on the bottom surface of hot side flat board 1
Bottom surface on offer some cold side channels, wherein, the area sums of all cold side channel cross sections is horizontal for all hot-side channels 4
The 1/3 of the area sum in section.
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,
Two distributary section cold side channels 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 and be located 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 led to
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.
Specific work process of the present utility model 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 successively, cold side enters
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.
Design principle of the present utility model 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 utility model by recirculated cooling water and
Nearby the physical property of supercritical carbon dioxide and exchange capability of heat are calculated and assessed critically weighted, find the horizontal stroke when cold side channel
When area of section is the 1/3 of the area of the cross section of hot-side channel 4, effectively recirculated cooling water can be avoided to work in laminar flow
Area, ensure the enough convection transfer rates of recirculated cooling water, and most on-way resistance will not be increased.
Above-described embodiment, the purpose of this utility model, technical scheme and beneficial effect are entered
One step describes in detail, should be understood that and the foregoing is only specific embodiment of the present utility model, is not used to limit
The utility model processed, all within the spirit and principles of the utility model, any modification, equivalent substitution and improvements done etc.,
It should be included within the scope of protection of the utility model.
Claims (6)
- A kind of 1. close-coupled forecooler for supercritical carbon dioxide Brayton cycle, it is characterised in that including substrate 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) it is interspersed successively from top to bottom, wherein, some hot-side channels (4) are offered on the bottom surface of hot side flat board (1), cold side is put down Some cold side channels are offered on the bottom surface of plate (2), wherein, the area sum of all cold side channel cross sections is led to for all hot sides The 1/3 of the area sum of road (4) cross section.
- 2. the close-coupled forecooler according to claim 1 for supercritical carbon dioxide Brayton cycle, its feature exists In, the from left to right parallel distribution successively of each hot-side channel (4), and each hot-side channel (4) is linear structure.
- 3. the close-coupled forecooler according to claim 1 for supercritical carbon dioxide Brayton cycle, its feature exists In, each cold side channel be in broken line type and equidistantly distributed, each cold side channel include 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), the second distributary section cold side channel (11), cold side outlet port collect section (5) and hot side outlet (3).
- 4. the close-coupled forecooler according to claim 1 for supercritical carbon dioxide Brayton cycle, its feature exists In cold side input port 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, the first distributary Section cold side channel (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 section cold side channel (10) and the linear type distribution of high-temperature reflux section cold side channel (12).
- 5. the close-coupled forecooler according to claim 1 for supercritical carbon dioxide Brayton cycle, its feature exists In the cross section of each hot-side channel (4) and the cross section of each cold side channel are semicircular structure.
- 6. the close-coupled forecooler according to claim 1 for supercritical carbon dioxide Brayton cycle, its feature exists In the quantity of, hot-side channel (4) be the quantity of low temperature adverse current section cold side channel (8), the quantity of following current section cold side channel (10) and The quantity sum of high-temperature reflux section cold side channel (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720690818.XU CN206832097U (en) | 2017-06-14 | 2017-06-14 | A kind of close-coupled forecooler for supercritical carbon dioxide Brayton cycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720690818.XU CN206832097U (en) | 2017-06-14 | 2017-06-14 | A kind of close-coupled forecooler for supercritical carbon dioxide Brayton cycle |
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| CN206832097U true CN206832097U (en) | 2018-01-02 |
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| CN201720690818.XU Active CN206832097U (en) | 2017-06-14 | 2017-06-14 | A kind of close-coupled forecooler for supercritical carbon dioxide Brayton cycle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107144158A (en) * | 2017-06-14 | 2017-09-08 | 西安热工研究院有限公司 | A kind of compact heat exchanger of supercritical carbon dioxide and water heat exchange |
-
2017
- 2017-06-14 CN CN201720690818.XU patent/CN206832097U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107144158A (en) * | 2017-06-14 | 2017-09-08 | 西安热工研究院有限公司 | A kind of compact heat exchanger of supercritical carbon dioxide and water heat exchange |
| CN107144158B (en) * | 2017-06-14 | 2024-02-27 | 西安热工研究院有限公司 | Compact heat exchanger for heat exchange between supercritical carbon dioxide and water |
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