CN207881286U - A kind of high-efficiency compact formula carbon dioxide evaporator preventing flow instability - Google Patents
A kind of high-efficiency compact formula carbon dioxide evaporator preventing flow instability Download PDFInfo
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- CN207881286U CN207881286U CN201820235647.6U CN201820235647U CN207881286U CN 207881286 U CN207881286 U CN 207881286U CN 201820235647 U CN201820235647 U CN 201820235647U CN 207881286 U CN207881286 U CN 207881286U
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Abstract
The utility model discloses a kind of high-efficiency compact formula carbon dioxide evaporators preventing flow instability, including several cold side plates and several hot side plates, wherein, each cold side plate and each hot side plate are staggeredly fixedly connected successively from top to bottom, wherein, the upper surface of cold side plate is provided with several cold side channels being vertically distributed and several horizontal direction pressure equalisation passages along horizontal distribution, and cold side plate on piece offers several the first vertical direction pressure equalisation passages from top to bottom；Several hot-side channels being vertically distributed are offered on the upper surface of hot side plate, and several the second vertical direction pressure equalisation passages from top to bottom are offered on hot side plate, the unstable problem of biphase gas and liquid flow in the heat exchanger effective solution cold side channel.
Description
Technical field
The utility model belongs to printed circuit board high-efficiency compact heat exchanger field, and being related to one kind preventing flowing instability
The high-efficiency compact formula carbon dioxide evaporator of property.
Background technology
From the point of view of domestic electrical industry present case, China's electric system regulating power is difficult to adapt to new energy completely big
More serious abandoning wind, abandoning optical issue occur in the requirement of scale development and consumption, some areas.2015, whole year abandoned wind-powered electricity generation
Amount is up to 33,900,000,000 kilowatt hours, and it is more than 20% that " three Norths " some areas, which abandon wind and abandon light rate,.And fired power generating unit especially coal motor
Group is still main force's power supply in China " three Norths " area in following considerably long one period.By to coal electricity Transformation of Unit, discharging it
Potential flexibility can effectively improve the regulating power of China's electric system, be that China promotes high efficiency smart electric system construction
Important content.
With significantly being increased as the generation of electricity by new energy installed capacity of representative using wind-powered electricity generation, photoelectricity, generation of electricity by new energy online is negative
More stringent requirements are proposed for peak modulation capacity of the great fluctuation process of lotus to China's fired power generating unit.The problem of fired power generating unit flexibility deficiency
Increasingly show, the problem of especially thermoelectricity unit peak modulation capacity deficiency is more prominent, and northern area Heating Season is because of fired power generating unit
Abandon that wind, to abandon optical issue more and more caused by peak modulation capacity difference.Therefore, fired power generating unit flexibility transformation is imperative, and hot
Electrolysis coupling is then one of the major tasks of thermoelectricity unit flexibility transformation.
The full decoupled and stepless peak regulation technique of thermoelectricity based on the inverse cycle of critical-cross carbon dioxide is a kind of advanced, efficient
Thermoelectricity decouples and peak regulation technique.The technology by based on steam Rankine cycle thermoelectricity unit and with and critical-cross carbon dioxide
Carbon dioxide compression formula heat pump system based on inverse cycle is organically combined, by consuming the electricity of thermoelectric perpetual motion machine group super generating,
The waste heat of absorption cycle cooling water realizes compensation heat supply.The advantage of the technology is mainly reflected in the following：Thermoelectricity solves completely
Coupling, maximum heat capacity greatly improve, and unit efficiency of energy utilization obviously rises, and the quick peak modulation capacity of unit significantly becomes strong.It is
It is a kind of to be had broad application prospects with the novel thermoelectricity decoupling of long term frequent participation peak regulation and peak regulation technique.
Wherein, carbon dioxide evaporator is one of the core component in the technology, and being depressured cooling by throttle valve generates
Carbon dioxide gas-liquid two-phase working substance absorb the low-grade exhaust heat in circulating cooling water of power plant, and then provide dioxy for upstream device
Change carbon saturated air.The heat exchanger side is the carbon dioxide gas-liquid two-phase working substance of high pressure, and other side is recirculated cooling water, heat exchange
Amount is big, and heat transfer temperature difference is small, and exchange capability of heat directly affects the COP of heat pump cycle.
It is therefore, generally acknowledged at present that high-efficiency compact formula co 2 heat exchanger --- printed circuit sheet heat exchanger should be dioxy
Change the ideal chose of carbon evaporator.But conventional printed circuit sheet heat exchanger is changing for multigroup elongated parallel port composition
Hot device, the heat exchanger of this structure type easily occur gas-liquid two-phase working medium in cold side channel under the conditions of higher thermal current density
The biphase gas and liquid flows unstability phenomenon such as density waveinstability, pressure drop type instability and thermal oscillation, seriously affects equipment
Safety.
If carbon dioxide gas-liquid two-phase in printed circuit sheet heat exchanger can be solved by Geometrical optimization appropriate
Printed circuit sheet heat exchanger then can be used as compression carbon dioxide heat pump system by the flowing instability sex chromosome mosaicism of stream well
In carbon dioxide evaporator.A large amount of materials and cost are saved than traditional shell-and-tube evaporator, and improve heat exchange effect
Rate.
However through investigation, it is related to the flowing of carbon dioxide biphase gas and liquid flow in printed circuit sheet heat exchanger both at home and abroad not at present
The open achievement and patent of stability problem are less.Therefore, it is also desirable to a large amount of original sex work：First, from carbon dioxide gas
The mechanism of liquid two-phase unstability phenomenon is started with, and fully considers the physical property changing rule and heat transfer flow characteristic of carbon dioxide,
Method by adding pressure equalisation passage effectively improves the boundary thermic load of two-phase flow instability, avoids going out in heat exchanger
Existing biphase gas and liquid flow unstability phenomenon；In addition, rationally designing hot and cold side heat exchanger channels, carbon dioxide gas-liquid two is fully matched
The exchange capability of heat of phase working medium and recirculated cooling water improves the heat exchange property of heat exchanger.
Utility model content
The shortcomings that the purpose of the utility model is to overcome the above-mentioned prior arts, providing one kind preventing flow instability
High-efficiency compact formula carbon dioxide evaporator, biphase gas and liquid flow is unstable in the heat exchanger effective solution cold side channel asks
Topic.
In order to achieve the above objectives, the high-efficiency compact formula carbon dioxide described in the utility model for preventing flow instability steams
It includes several cold side plates and several hot side plates to send out device, wherein each cold side plate and each hot side plate are handed over successively from top to bottom
Mistake is fixedly connected, wherein the upper surface of cold side plate is provided with several cold side channels being vertically distributed and several along level
The horizontal direction pressure equalisation passage of distribution, cold side plate on piece offer several the first vertical direction pressure balances from top to bottom
Channel；Several hot-side channels being vertically distributed are offered on the upper surface of hot side plate, are offered on hot side plate several from upper
The second vertical direction pressure equalisation passage under；
Each first vertical direction pressure equalisation passage is located in horizontal direction pressure equalisation passage, two neighboring hot-side channel
Between form hot side stud, the second vertical direction pressure equalisation passage is opened in the hot side stud, and adjacent cold side plate on piece
The first vertical direction pressure equalisation passage be connected with the second vertical direction pressure equalisation passage on hot side plate.
The cross section of each cold side channel and each hot-side channel is semicircular structure.
Each cold side channel intersects vertically with each horizontal direction pressure equalisation passage.
A first vertical direction pressure equalisation passage in adjacent cold side channel corresponds to one on adjacent hot-side channel
Second vertical direction pressure equalisation passage, and any first vertical direction pressure equalisation passage and the second corresponding Vertical Square
To pressure equalisation passage consistency from top to bottom and it is connected.
Each horizontal direction pressure equalisation passage, each first vertical direction pressure equalisation passage, each second vertical direction pressure
Circulation has cold side working medium in balance channel and each cold side channel；Circulation has hot side working medium in hot-side channel.
It is mutually welded by diffusion welding (DW) between adjacent cold side plate and hot side plate.
The cold side working medium is carbon dioxide gas-liquid two-phase working substance, and the hot side working medium is water.
Cold side channel is equal with the pitch of hot-side channel；
The pitch of horizontal direction pressure equalisation passage is 8-10 times of the pitch of cold side channel.
The utility model has the advantages that：
It is described in the utility model to prevent the high-efficiency compact formula carbon dioxide evaporator of flow instability in concrete operations
When, in same cold side plate on piece, each cold side channel is connected by horizontal direction pressure equalisation passage, in different cold side plates
On, by the first vertical direction pressure equalisation passage of adjacent cold side plate on piece and its between the second Vertical Square on hot side plate
The horizontal direction pressure equalisation passage of adjacent cold side plate on piece is connected to pressure equalisation passage, thus by all cold side plates
On cold side channel be connected, realize the intermediate mixing of the multistage of cold side channel and pressure balance, greatly improve generation carbon dioxide
The boundary thermic load of biphase gas and liquid flow flow instability effectively solves conventional printed circuit boards heat exchanger in higher thermal current density
Under the conditions of asking for the biphase gas and liquid flows unstability phenomenons such as density waveinstability, pressure drop type instability grade thermal oscillation easily occurs
Topic, significantly improves the safety of equipment.
Description of the drawings
Fig. 1 is the vertical view of cold side plate 1 in the utility model；
Fig. 2 is the vertical view of hot side plate 2 in the utility model；
Fig. 3 is the sectional view of the utility model 13 position of pressure equalisation passage in the horizontal direction；
Fig. 4 is sectional view of the utility model in 13 position of non-horizontal directions pressure equalisation passage.
Wherein, 1 it is cold side plate, 2 be hot side plate, 11 be cold side channel, 12 be cold side stud, 13 is horizontal direction pressure
Dynamic balance channel, 14 for the first vertical direction pressure equalisation passage, 21 be hot-side channel, 22 be hot side stud, 23 be second hang down
Histogram is to pressure equalisation passage.
Specific implementation mode
The utility model is described in further detail below in conjunction with the accompanying drawings：
With reference to figure 1, Fig. 2, Fig. 3 and Fig. 4, the high-efficiency compact formula dioxy described in the utility model for preventing flow instability
It includes several cold side plates 1 and several hot side plates 2 to change carbon evaporator, wherein each cold side plate 1 and each hot side plate 2 are from upper
Under successively staggeredly be fixedly connected, wherein the upper surface of cold side plate 1 be provided with several cold side channels 11 being vertically distributed with
And several horizontal direction pressure equalisation passages 13 along horizontal distribution, offer on cold side plate 1 it is several from top to bottom first
Vertical direction pressure equalisation passage 14；Several hot-side channels 21 being vertically distributed, hot side are offered on the upper surface of hot side plate 2
Several the second vertical direction pressure equalisation passages 23 from top to bottom are offered on plate 2；Each first vertical direction pressure balance
Channel 14 is located in horizontal direction pressure equalisation passage 13, formation hot side stud 22 between two neighboring hot-side channel 21, and second
Vertical direction pressure equalisation passage 23 is opened in the hot side stud 22, and the first vertical direction pressure on adjacent cold side plate 1
Dynamic balance channel 14 is connected with the second vertical direction pressure equalisation passage 23 on hot side plate 2.
The cross section of each cold side channel 11 and each hot-side channel 21 is semicircular structure；Each cold side channel 11 and each level
Directional pressure balance channel 13 intersects vertically.
A first vertical direction pressure equalisation passage 14 in adjacent cold side channel 11 corresponds on adjacent hot-side channel 21
A second vertical direction pressure equalisation passage 23, and any first vertical direction pressure equalisation passage 14 with it is corresponding
Second vertical direction pressure equalisation passage, 23 consistency from top to bottom and it is connected.
Each horizontal direction pressure equalisation passage 13, each first vertical direction pressure equalisation passage 14, each second vertical direction
Circulation has cold side working medium in pressure equalisation passage 23 and each cold side channel 11；Circulation has hot side working medium in hot-side channel 21；Phase
It is mutually welded by diffusion welding (DW) between adjacent cold side plate 1 and hot side plate 2；The cold side working medium is carbon dioxide gas-liquid two-phase work
Matter, the hot side working medium are water.
Cold side channel 11 is equal with the pitch of hot-side channel 21；The pitch of horizontal direction pressure equalisation passage 13 is logical for cold side
8-10 times of the pitch in road 11；Cold side stud 12 is formed between adjacent cold side channel 11.
Carbon dioxide gas-liquid two-phase working substance is flowed through and is absorbed heat in cold side channel 11, passes through horizontal direction pressure equalisation passage
13 are connected to all cold side channels 11 on same cold side plate 1, will be different by the second vertical direction pressure equalisation passage 23
All cold side channels 11 on cold side plate 1 are connected to, mixing and pressure balance among the final multistage for realizing cold side channel 11, greatly
Width improves the boundary thermic load that carbon dioxide biphase gas and liquid flow flow instability occurs, and efficiently solves conventional printed circuit boards
Under the conditions of higher thermal current density the gas-liquids such as density waveinstability, pressure drop type instability and thermal oscillation two easily occur for heat exchanger
Mutually the problem of stream unstability phenomenon, the safety of equipment is significantly improved.
Above-described specific implementation mode, to the purpose of this utility model, technical solution and advantageous effect 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 (8)
1. a kind of high-efficiency compact formula carbon dioxide evaporator preventing flow instability, which is characterized in that including several cold sides
Plate (1) and several hot side plates (2), wherein each cold side plate (1) and each hot side plate (2) are staggeredly solid successively from top to bottom
Fixed connection, wherein the upper surface of cold side plate (1) is provided with several cold side channels (11) being vertically distributed and several along water
Divide the horizontal direction pressure equalisation passage (13) of cloth equally, several the first Vertical Squares from top to bottom are offered on cold side plate (1)
To pressure equalisation passage (14)；Several hot-side channels (21) being vertically distributed, hot side are offered on the upper surface of hot side plate (2)
Several the second vertical direction pressure equalisation passages (23) from top to bottom are offered on plate (2)；
Each first vertical direction pressure equalisation passage (14) is located in horizontal direction pressure equalisation passage (13), two neighboring hot side
Hot side stud (22) is formed between channel (21), the second vertical direction pressure equalisation passage (23) is opened in the hot side stud
(22), the first vertical direction pressure equalisation passage (14) and on adjacent cold side plate (1) is hung down with second on hot side plate (2)
Histogram is connected to pressure equalisation passage (23).
2. the high-efficiency compact formula carbon dioxide evaporator according to claim 1 for preventing flow instability, feature exist
In the cross section of each cold side channel (11) and each hot-side channel (21) is semicircular structure.
3. the high-efficiency compact formula carbon dioxide evaporator according to claim 1 for preventing flow instability, feature exist
In each cold side channel (11) intersects vertically with each horizontal direction pressure equalisation passage (13).
4. the high-efficiency compact formula carbon dioxide evaporator according to claim 1 for preventing flow instability, feature exist
In on the corresponding adjacent hot-side channel (21) of a first vertical direction pressure equalisation passage (14) on adjacent cold side channel (11)
A second vertical direction pressure equalisation passage (23), and any first vertical direction pressure equalisation passage (14) with it is right with it
The second vertical direction pressure equalisation passage (23) consistency from top to bottom for answering and it is connected.
5. the high-efficiency compact formula carbon dioxide evaporator according to claim 1 for preventing flow instability, feature exist
In each horizontal direction pressure equalisation passage (13), each first vertical direction pressure equalisation passage (14), each second vertical direction pressure
Circulation has cold side working medium in dynamic balance channel (23) and each cold side channel (11)；Circulation has hot side work in hot-side channel (21)
Matter.
6. the high-efficiency compact formula carbon dioxide evaporator according to claim 1 for preventing flow instability, feature exist
In mutually being welded by diffusion welding (DW) between adjacent cold side plate (1) and hot side plate (2).
7. the high-efficiency compact formula carbon dioxide evaporator according to claim 5 for preventing flow instability, feature exist
In the cold side working medium is carbon dioxide gas-liquid two-phase working substance, and the hot side working medium is water.
8. the high-efficiency compact formula carbon dioxide evaporator according to claim 1 for preventing flow instability, feature exist
In cold side channel (11) is equal with the pitch of hot-side channel (21)；
The pitch of horizontal direction pressure equalisation passage (13) is 8-10 times of the pitch of cold side channel (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820235647.6U CN207881286U (en) | 2018-02-09 | 2018-02-09 | A kind of high-efficiency compact formula carbon dioxide evaporator preventing flow instability |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820235647.6U CN207881286U (en) | 2018-02-09 | 2018-02-09 | A kind of high-efficiency compact formula carbon dioxide evaporator preventing flow instability |
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| CN207881286U true CN207881286U (en) | 2018-09-18 |
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| CN201820235647.6U Active CN207881286U (en) | 2018-02-09 | 2018-02-09 | A kind of high-efficiency compact formula carbon dioxide evaporator preventing flow instability |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2018
- 2018-02-09 CN CN201820235647.6U patent/CN207881286U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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