CN207570380U - The low flow resistance high efficiency ultracritical carbon dioxide precooling device that a kind of waterproof side blocks - Google Patents
The low flow resistance high efficiency ultracritical carbon dioxide precooling device that a kind of waterproof side blocks Download PDFInfo
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- CN207570380U CN207570380U CN201721234951.0U CN201721234951U CN207570380U CN 207570380 U CN207570380 U CN 207570380U CN 201721234951 U CN201721234951 U CN 201721234951U CN 207570380 U CN207570380 U CN 207570380U
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- tablet
- hot side
- runner
- carbon dioxide
- heat exchange
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Abstract
The utility model discloses the low flow resistance high efficiency ultracritical carbon dioxide precooling device that a kind of waterproof side blocks, including several hot side units and several cold side tablets, wherein, each hot side unit and each cold side tablet interlock successively from top to bottom to be fixedly connected；The hot side unit includes the hot side upper flat plate being fixedly connected sequentially from top to bottom, strengthens tablet and hot side lower flat plate, wherein, several first grooves are etched on the lower surface of hot side upper flat plate, first groove surrounds top heat exchange runner with strengthening the upper surface of tablet, several second grooves are etched on the upper surface of hot side lower flat plate, second groove surrounds lower part heat exchange runner with strengthening the lower surface of tablet；Cold side runner is provided in cold side tablet, wherein, the cold side runner is biomimetic features, the forecooler can realize the cooling of supercritical carbon dioxide, avoid the problem that traditional printed circuit board forecooler water wing passage easily blocks simultaneously, heat transfer effect is preferable, and manufacture is at low cost.
Description
Technical field
The utility model belongs to printed circuit board high-efficiency compact heat exchanger field, is related to a kind of the low of waterproof side blocking
Flow resistance high efficiency ultracritical carbon dioxide precooling device.
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, not need to novel 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
The heat exchanger that hot and cold side tablet is welded together by way of diffusion welding (DW), the runner that hot and cold side exchanges heat on tablet is logical
Cross the minim 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.
Forecooler is one of core component of supercritical carbon dioxide Brayton cycle electricity generation system, its effect is will be complete
Exhaust gas (supercritical carbon dioxide) into backheat further cools down, and waste heat is discharged, and exhaust gas temperature is reduced to compression to environment
The design temperature of machine entrance.And suction port of compressor design temperature is usually chosen for the corresponding pseudo-critical temperature of inlet pressure, such as：Enter
When mouth design pressure is 7.6MPa, entry design temperature is about 32 DEG C；When entry design pressure is 7.9MPa, entry design temperature
About 34.2 DEG C.This means that by exhaust gas in forecooler to demineralized water, by demineralized water to recirculated cooling water, again by recirculated cooling water
Total heat transfer temperature difference to environment is very limited, and forecooler needs enough heat exchange efficiencies and huge heat exchange area and could realize
Technological requirement.This proposes the heat exchange property of forecooler, structure design very harsh requirement, while cost is also very
It is high.
If recirculated cooling water can be introduced directly into forecooler cold side channel, and corresponding water side microchannel is overcome to block
The heat transfer process of exhaust gas to demineralized water, demineralized water to recirculated cooling water is reduced to straight from exhaust gas to recirculated cooling water by problem
Heat exchange is connect, then can effectively improve the heat transfer temperature difference of the cold and hot both sides of forecooler, the heat exchange area needed for forecooler is greatly reduced, into
And significantly reduce the manufacture cost of forecooler.
However through investigation, it is related to both at home and abroad at present for overcritical in supercritical carbon dioxide Brayton cycle electricity generation system
Carbon dioxide and water heat exchange printed circuit board forecooler open achievement and patent it is less, more without recirculated cooling water directly into
Enter the achievement that forecooler cold side exchanges heat.Therefore, it is also desirable to a large amount of original sex work：First, from supercritical carbon dioxide
The characteristics of Brayton cycle, considers, with reference to carbon dioxide and the physical property changing rule of water, passes through optimizing flow passage arrangement, it is ensured that
Hot and cold side program of flow area for governing is reasonable, realizes the high efficient heat exchanging of forecooler；In addition, rationally designing cold side heat exchanger channels, pass through stream
Reasonable selection and preferred arrangement in road structure while flow resistance is reduced, realize the anti-clogging of water wing passage.
Utility model content
The purpose of the utility model is to overcome the shortcomings that the above-mentioned prior art, provide a kind of low stream of waterproof side blocking
High efficiency ultracritical carbon dioxide precooling device is hindered, which can realize the cooling of supercritical carbon dioxide, while avoid tradition
The problem of printed circuit board forecooler water wing passage easily blocks, heat transfer effect is preferable, and manufacture is at low cost.
In order to achieve the above objectives, the low flow resistance high efficiency ultracritical carbon dioxide that waterproof side described in the utility model blocks is pre-
Cooler includes several hot side units and several cold side tablets, wherein, each hot side unit is handed over successively from top to bottom with each cold side tablet
Mistake is fixedly connected；
The hot side unit includes the hot side upper flat plate being fixedly connected sequentially from top to bottom, strengthens tablet and hot side lower part
Tablet, wherein, several first grooves are etched on the lower surface of hot side upper flat plate, first groove is with strengthening the upper of tablet
Surface surrounds top heat exchange runner, is etched with several second grooves on the upper surface of hot side lower flat plate, second groove with
The lower surface for strengthening tablet surrounds lower part heat exchange runner；
Cold side runner is provided in cold side tablet, wherein, the cold side runner is biomimetic features.
The cross section of first groove and the cross section of the second groove are semicircular structure.
Top heat exchange runner and lower part heat exchange runner are zigzag configuration.
Top heat exchange runner and lower part heat exchange runner include hot side tablet entrance channel, hot side tablet sprue and hot side
Tablet outlet flow, wherein, hot side tablet entrance channel is connected through hot side tablet sprue with hot side tablet outlet flow.
Hot side tablet entrance channel and the equal horizontal distribution of hot side tablet outlet flow, hot side tablet sprue are distributed vertically.
It is mutually welded by diffusion welding (DW) between adjacent heat side unit and cold side tablet, the hot side upper flat in same hot side unit
Plate is strengthened mutually welding by diffusion welding (DW) between tablet and hot side lower flat plate.
The working medium to circulate in top heat exchange runner and lower part heat exchange runner is supercritical carbon dioxide, cold in cold side tablet
The working medium to circulate in side runner is recirculated cooling water.
In cold side tablet in cold side runner in the circulating direction of working medium and top heat exchange runner the circulating direction of working medium and under
The circulating direction of working medium is contrary in portion's heat exchange runner.
Cold side runner is raindrop shape channel.
The utility model has the advantages that：
The low flow resistance high efficiency ultracritical carbon dioxide precooling device that waterproof side described in the utility model blocks is in concrete operations
When, cold side runner is provided in cold side tablet, and when in use, recirculated cooling water flows through the cold side runner to overcritical titanium dioxide
Carbon cools down, wherein, the cold side runner is biomimetic features, therefore, can effectively reduce the circulating resistance of water, avoid cold side
Runner blocks, so as to effectively solve the problems, such as that traditional printed circuit board forecooler water wing passage easily blocks, when in use,
Can by recirculated cooling water be sent into cold side runner in, by recirculated cooling water directly with top heat exchanger channels and lower part heat exchanger channels
Interior supercritical carbon dioxide exchanges heat, and the process by demineralized water intermediate heat transfer is reduced, so as to increase the cold and hot side of preheater
Heat transfer temperature difference, the heat exchange area needed for forecooler is greatly reduced, and then significantly reduce the manufacture cost of forecooler.
Description of the drawings
Fig. 1 is the structure diagram of the utility model；
Fig. 2 is the structure diagram of hot side upper flat plate 1a in the utility model；
Fig. 3 is the structure diagram of hot side lower flat plate 1b in the utility model；
Fig. 4 is the structure diagram of cold side tablet 2 in the utility model.
Wherein, 1 be hot side unit, 2 be cold side tablet, 1a is hot side upper flat plate, 1b be hot side lower flat plate, 1c for plus
Strong tablet, 11 be hot side tablet entrance channel, 12 be hot side tablet sprue, 13 be hot side tablet outlet flow, 21 be cold side
Runner.
Specific embodiment
The utility model is described in further detail below in conjunction with the accompanying drawings：
With reference to figure 1, Fig. 2 and Fig. 3, the low flow resistance high efficiency ultracritical carbon dioxide of waterproof side blocking described in the utility model
Forecooler includes several hot side units 1 and several cold side tablets 2, wherein, each hot side unit 1 and each cold side tablet 2 are from top to bottom
It is staggeredly fixedly connected successively；The hot side unit 1 includes the hot side upper flat plate 1a being fixedly connected sequentially from top to bottom, strengthens putting down
Plate 1c and hot side lower flat plate 1b, wherein, it is etched with several first grooves on the lower surface of hot side upper flat plate 1a, described first
Groove surrounds top heat exchange runner with strengthening the upper surface of tablet 1c, and several the are etched on the upper surface of hot side lower flat plate 1b
Two grooves, second groove surround lower part heat exchange runner with strengthening the lower surface of tablet 1c；Cold side is provided in cold side tablet 2
Runner 21, wherein, the cold side runner 21 is biomimetic features.
The cross section of first groove and the cross section of the second groove are semicircular structure；Top heat exchange runner and lower part are changed
Hot flow path is zigzag configuration；Top heat exchange runner and lower part heat exchange runner include hot side tablet entrance channel 11, hot side tablet
Sprue 12 and hot side tablet outlet flow 13, wherein, hot side tablet entrance channel 11 is through hot side tablet sprue 12 and hot side
Tablet outlet flow 13 is connected；13 equal horizontal distribution of hot side tablet entrance channel 11 and hot side tablet outlet flow, hot side are put down
Plate sprue 12 is distributed vertically.
It is mutually welded by diffusion welding (DW) between adjacent heat side unit 1 and cold side tablet 2, in the hot side in same hot side unit 1
Portion tablet 1a, strengthen mutually welding by diffusion welding (DW) between tablet 1c and hot side lower flat plate 1b；Top heat exchange runner and lower part are changed
The working medium to circulate in hot flow path is supercritical carbon dioxide, and the working medium to circulate in cold side runner 21 in cold side tablet 2 is cycle
Cooling water；In cold side tablet 2 in cold side runner 21 in the circulating direction of working medium and top heat exchange runner the circulating direction of working medium and
The circulating direction of working medium is contrary in the heat exchange runner of lower part；Cold side runner 21 is raindrop shape channel.
The effect that hot side tablet entrance channel 11 and hot side tablet outlet flow 13 each serve as assignment of traffic and collect, together
When the inlet and outlet of hot side unit 1 can be arranged in the left and right sides of heat exchange core body, so as to simplify cold side runner 21 into
The complexity of exit passageway design reduces the possibility that cold side runner 21 blocks.
The cold side runner 21 of cold side tablet 2 is the raindrop shape structure obtained by method for chemially etching, is reducing water effluent
While resistance, effectively prevent cold-hot flow passage from blocking.In addition, the raindrop type flow-disturbing guide vane in cold side runner 21 is in be staggered in arrangement,
The disturbance of cold side working medium can be increased, further improve the convection transfer rate of cold side, and then promote the overall heat exchange of forecooler
Ability.
Cold and hot side runner uses counter-flow arrangement, and the piece number of hot side heat exchanger plates is 2 times of cold side heat exchanger plates the piece number.Faced due to super
Boundary's carbon dioxide is operated near pseudo-critical temperature point, and the water of cold side was then in cold-zone, hot side working medium and cold side working medium
Specific heat at constant pressure difference is very big, using above-mentioned arrangement, can effectively improve the convection transfer rate of cold side and hot side, Jin Ershi
The low flow resistance high efficient heat exchanging of existing forecooler.
Above-described specific embodiment, the purpose of this utility model, technical solution and advantageous effect have been carried out into
One step is described in detail, it should be understood that the foregoing is merely specific embodiment of the present utility model, is not used to limit
The utility model processed, within the spirit and principle of the utility model, any modification, equivalent substitution, improvement and etc. done,
It should be included within the scope of protection of this utility model.
Claims (9)
1. the low flow resistance high efficiency ultracritical carbon dioxide precooling device that a kind of waterproof side blocks, which is characterized in that including several hot sides
Unit (1) and several cold side tablets (2), wherein, each hot side unit (1) is staggeredly solid successively from top to bottom with each cold side tablet (2)
Fixed connection；
The hot side unit (1) including be fixedly connected sequentially from top to bottom hot side upper flat plate (1a), strengthen tablet (1c) and
Hot side lower flat plate (1b), wherein, several first grooves are etched on the lower surface of hot side upper flat plate (1a), described first is recessed
Slot surrounds top heat exchange runner with strengthening the upper surface of tablet (1c), is etched on the upper surface of hot side lower flat plate (1b) several
Second groove, second groove surround lower part heat exchange runner with strengthening the lower surface of tablet (1c)；
Cold side runner (21) is provided in cold side tablet (2), wherein, the cold side runner (21) is biomimetic features.
2. the low flow resistance high efficiency ultracritical carbon dioxide precooling device that waterproof side according to claim 1 blocks, feature exist
In the cross section of the cross section of the first groove and the second groove is semicircular structure.
3. the low flow resistance high efficiency ultracritical carbon dioxide precooling device that waterproof side according to claim 1 blocks, feature exist
In top heat exchange runner and lower part heat exchange runner are zigzag configuration.
4. the low flow resistance high efficiency ultracritical carbon dioxide precooling device that waterproof side according to claim 1 blocks, feature exist
In, top heat exchange runner and lower part heat exchange runner include hot side tablet entrance channel (11), hot side tablet sprue (12) and
Hot side tablet outlet flow (13), wherein, hot side tablet entrance channel (11) is through hot side tablet sprue (12) and hot side tablet
Outlet flow (13) is connected.
5. the low flow resistance high efficiency ultracritical carbon dioxide precooling device that waterproof side according to claim 4 blocks, feature exist
In hot side tablet entrance channel (11) and hot side tablet outlet flow (13) equal horizontal distribution, hot side tablet sprue (12) erect
Straight distribution.
6. the low flow resistance high efficiency ultracritical carbon dioxide precooling device that waterproof side according to claim 1 blocks, feature exist
In mutually being welded by diffusion welding (DW) between adjacent heat side unit (1) and cold side tablet (2), in the hot side in same hot side unit (1)
Portion's tablet (1a) is strengthened mutually welding by diffusion welding (DW) between tablet (1c) and hot side lower flat plate (1b).
7. the low flow resistance high efficiency ultracritical carbon dioxide precooling device that waterproof side according to claim 4 blocks, feature exist
In the working medium to circulate in, top heat exchange runner and lower part heat exchange runner be supercritical carbon dioxide, cold side in cold side tablet (2)
The working medium to circulate in runner (21) is recirculated cooling water.
8. the low flow resistance high efficiency ultracritical carbon dioxide precooling device that waterproof side according to claim 4 blocks, feature exist
In, in cold side tablet (2) in the circulating direction of cold side runner (21) interior working medium and top heat exchange runner the circulating direction of working medium and
The circulating direction of working medium is contrary in the heat exchange runner of lower part.
9. the low flow resistance high efficiency ultracritical carbon dioxide precooling device that waterproof side according to claim 1 blocks, feature exist
In cold side runner (21) is raindrop shape channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721234951.0U CN207570380U (en) | 2017-09-25 | 2017-09-25 | The low flow resistance high efficiency ultracritical carbon dioxide precooling device that a kind of waterproof side blocks |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721234951.0U CN207570380U (en) | 2017-09-25 | 2017-09-25 | The low flow resistance high efficiency ultracritical carbon dioxide precooling device that a kind of waterproof side blocks |
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| Publication Number | Publication Date |
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| CN207570380U true CN207570380U (en) | 2018-07-03 |
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| CN201721234951.0U Active CN207570380U (en) | 2017-09-25 | 2017-09-25 | The low flow resistance high efficiency ultracritical carbon dioxide precooling device that a kind of waterproof side blocks |
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Cited By (4)
| 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 |
| CN109269334A (en) * | 2018-09-03 | 2019-01-25 | 西安交通大学 | A kind of cast type microchannel compact heat exchanger and its manufacturing method |
| CN109724437A (en) * | 2019-01-29 | 2019-05-07 | 北京首航艾启威节能技术股份有限公司 | Direct air cooling heat exchanger based on PCHE combines brazing technique |
| CN110425915A (en) * | 2019-07-10 | 2019-11-08 | 中国船舶重工集团公司第七二五研究所 | A kind of novel printed circuit board formula heat exchanger core body comprising combined flow channel |
-
2017
- 2017-09-25 CN CN201721234951.0U patent/CN207570380U/en active Active
Cited By (5)
| 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 |
| CN109269334A (en) * | 2018-09-03 | 2019-01-25 | 西安交通大学 | A kind of cast type microchannel compact heat exchanger and its manufacturing method |
| CN109269334B (en) * | 2018-09-03 | 2019-09-10 | 西安交通大学 | A kind of cast type microchannel compact heat exchanger and its manufacturing method |
| CN109724437A (en) * | 2019-01-29 | 2019-05-07 | 北京首航艾启威节能技术股份有限公司 | Direct air cooling heat exchanger based on PCHE combines brazing technique |
| CN110425915A (en) * | 2019-07-10 | 2019-11-08 | 中国船舶重工集团公司第七二五研究所 | A kind of novel printed circuit board formula heat exchanger core body comprising combined flow channel |
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