CN105953202B - System and method occurs for a kind of sensible heat heat accumulating type live (open) steam based on regulation of series - Google Patents
System and method occurs for a kind of sensible heat heat accumulating type live (open) steam based on regulation of series Download PDFInfo
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- CN105953202B CN105953202B CN201610323747.XA CN201610323747A CN105953202B CN 105953202 B CN105953202 B CN 105953202B CN 201610323747 A CN201610323747 A CN 201610323747A CN 105953202 B CN105953202 B CN 105953202B
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000005338 heat storage Methods 0.000 claims abstract description 52
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 230000003020 moisturizing effect Effects 0.000 claims abstract description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 11
- 229910002804 graphite Inorganic materials 0.000 claims description 11
- 239000010439 graphite Substances 0.000 claims description 11
- 239000012530 fluid Substances 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
- 230000008676 import Effects 0.000 claims description 3
- 230000001052 transient effect Effects 0.000 claims description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 10
- 239000003345 natural gas Substances 0.000 abstract description 5
- 238000009825 accumulation Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 230000036760 body temperature Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 241000270295 Serpentes Species 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 239000011232 storage material Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/28—Methods of steam generation characterised by form of heating method in boilers heated electrically
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B35/00—Control systems for steam boilers
-
- 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
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
- F28D20/0056—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using solid heat storage material
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses a kind of sensible heat heat accumulating type live (open) steam based on regulation of series to occur system and method.System includes outlet header, outlet connecting pipe, heat storage, heat exchanger tube, the first temperature sensor, sealed insulating layer, triple valve, check-valves, influent header, water circulating pump, flowmeter, switch board, moisturizing connecting tube, cistern, second temperature sensor, three-temperature sensor.The present invention uses pipeline series connection method, and the coefficient of heat transfer and heat exchange power reduce caused by solving the problems, such as regenerator temperature reduction by increasing the method for heat exchange area in flow direction；Flow in heat transfer process of the present invention in single conduit is constant, and heat transfer process is relatively easy, is easy to the design and calculating of system.By the implementation of the present invention, the operating cost of traditional electric boiler can be effectively reduced, by calculating, the vapour system cost using the present invention is suitable with natural gas system, has extensive market application foreground.
Description
Technical field
The present invention relates to a kind of sensible heat heat accumulating type live (open) steam based on regulation of series to occur system and method, belongs to sensible heat
Regenerative heat exchange technical field.
Background technology
With energy-saving and emission-reduction strategy popularization, traditional high energy consumption, the Small Coal-fired Boilers of high pollution will gradually be substituted and
Eliminate, this brings the huge market space to heat supply market.Currently, solves the heat demand in market mainly by the large-scale of steam power plant
Thermal power plant unit, but this mechanism needs the planning and construction of long period, and market flexibility is poor.Needed for the heat supply of dispersiveness
Ask, natural gas boiler, electric boiler and solar boiler have huge development space, but natural gas boiler system has supply
There is the too high problem of electric cost in insufficient problem, electrically heated boiler, solar boiler has thermic load instability problem.
For the electric cost problem of electric boiler, heat storage technology provides well for reduction system electric cost and solves to think
Road, using the price difference of peak-trough electricity, the operating cost of electric boiler can be reduced to natural gas horizontal, have extensive market should
Use prospect.
However, heat storage technology includes sensible heat heat storage technology and latent-heat storage technology, sensible heat hold over system is to utilize accumulation of heat material
The thermal capacity of material, it is raised and lowered by temperature to realize the storage of heat or release process.The system architecture is fairly simple, fortune
Row security is higher than phase-change heat exchange system, but in heat transfer process the problem of be primarily present, the temperature of heat storage constantly drops
Low, the heat exchange power under the conditions of the identical heat exchange area that causes to exchange heat constantly reduces, and the problem of power output is unstable be present, can only
Applied to the less demanding occasion of steam parameter, it is impossible to meet there is the heat utilization of strict demand to steam parameter and power output
The demand of system, such as heating boiler.
Therefore, how to solve the problems, such as that sensible heat transfer system heat exchange power constantly reduces, heat exchange power is stable, realizes accumulation of heat
System is lasting in the range of bigger temperature, stably produces the steam of meet demand, turns into the design of sensible heat hold over system urgently
Need to solve the problems, such as.
The content of the invention
To solve the above problems, the present invention proposes that system occurs for a kind of sensible heat heat accumulating type live (open) steam based on parallel connection regulation
And method.
To achieve the above object, the present invention adopts the following technical scheme that：
System occurs for a kind of sensible heat heat accumulating type live (open) steam based on regulation of series, including outlet header, outlet connecting pipe,
Heat storage, heat exchanger tube, the first temperature sensor, sealed insulating layer, triple valve, check-valves, influent header, water circulating pump, flow
Meter, switch board, moisturizing connecting tube, cistern, second temperature sensor, three-temperature sensor；It is provided with heat storage in snake
The heat exchanger tube of shape arrangement, heat storage are covered with sealed insulating layer outside, and water circulating pump outlet is through moisturizing connecting tube and influent header, heat exchange
Pipe is sequentially connected；Heat exchanger tube streamwise is sequentially installed with some triple valves, and another outlet of triple valve connects through outlet
Pipe is connected with outlet header, and heat exchange pipe end is connected by check-valves through outlet connecting pipe with outlet header；Water circulating pump entrance
It is connected with cistern, the first temperature sensor is installed on heat storage, second temperature sensor is installed in influent header, exports
Three-temperature sensor is installed in header, flowmeter is housed in moisturizing connecting tube, flowmeter, temperature sensor, triple valve, is followed
Ring water pump, second temperature sensor, three-temperature sensor are connected with switch board respectively.
The quantity of described heat exchanger tube is more than or equal to 1, when heat exchanger tube quantity is more than 1, every heat exchange tube inlet and entrance
Header is to be connected in parallel.
Described heat storage is piled up by some graphite blocks to be formed, and the semicircle mounting hole between graphite block is by cooperatively forming circle
Hole, then be connected with heat exchanger tube.
Described heat storage material is graphite, and its mode of heating includes electrical heating and Salar light-gathering heats.
The heat-exchange method of system occurs for the sensible heat heat accumulating type live (open) steam based on regulation of series described in a kind of utilization：Control
Cabinet gives circular flow G according to demandallValue, so as to which the flow G of distribution in every heat exchanger tube is constant, liquid water is in heat exchanger tube
In by being exchanged heat with heat storage, produce steam and flow into outlet header discharge through triple valve；At the same time, switch board joins according to outlet
The opening and closing quantity of the temperature of three-temperature sensor in case and the first temperature sensor control triple valve of heat storage, so as to
The adjustment of heat exchanging area is realized, makes the temperature of heat storage reduce with heat exchange, but the heat exchange power in heat exchanger tube is kept not
Become, so as to ensure the parameter constant of outlet vapor；
Switch board is as follows to the control method of triple valve：
Starting stage, the open and-shut mode of each triple valve is controlled, make liquid water only by being flowed after a part for heat exchanger tube
Inlet/outlet header；Now, in the triple valve of unlatching, the flow direction of only last triple valve is communicated with influent header, other
Triple valve is communicated with heat exchanger tube；Meet following energy balance in single heat exchange tube：
In formula,For the heat exchanger tube overall average coefficient of heat transfer under initial temperature,For heat storage starting stage mean temperature,
For fluid mean temperature in single heat exchange tube, Δ H is that heat exchanger tube imports and exports fluid enthalpy difference, A0Effectively changed for starting stage heat exchanger tube
Hot area；
The maximum fluctuation value of outlet steam temperature is set as 2 Δ T ', corresponding steam enthalpy difference is 2 Δ H '；
Any i moment, when the power in heat exchanger tube reaches following relational expression (2), the current flow direction outlet of switch board control
The triple valve of header is turned to so that fluid, which continues on heat exchanger tube and flows to next section, to be exchanged heat, and controls next threeway
Valve leads to outlet header；
In formula：For the instantaneous overall average coefficient of heat transfer；For the average transient temperature of heat storage；AiHave for i moment heat exchanger tubes
Imitate heat exchange area；
Now, the effective heat exchange area of heat exchanger tube increases to Ai+1So that heat exchanging relation meets equation below (3)：
Thus, the regulation and control of a heat exchange area are completed so that system heat exchange power keeps relative stability；
It is in course of adjustment, the heat exchanger tube length Δ between the triple valve that the triple valve and i+1 moment that the i moment opens are opened
liBetween relation be：
Wherein, Ai+1For i+1 moment heat exchanger tube effective heat exchange areas；D is heat exchange bore.
Compared with prior art, the present invention is mainly characterized by：
(1) present invention uses pipeline series connection method, solves accumulation of heat by increasing the method for heat exchange area in flow direction
The problem of average heat transfer coefficient caused by temperature reduction and heat exchange power reduce.
(2) present invention uses series connection method, and the flow in single conduit is constant, and heat transfer process is relatively easy, is easy to system
Design and calculating.
(3) while the present invention adjusts single heat exchange tube power by series connection method, consider that parallel pipeline is realized to single
The control of piping flow, extend the power adaptability of system.
(4) heat storage of the present invention is using standardization block structure so that heat storage body structure can carry out group according to actual conditions
Close, improve adaptability, half pore structure improves the convenience installed between heat storage and pipeline.
Brief description of the drawings
System occurs for a kind of sensible heat heat accumulating type live (open) steam based on regulation of series that Fig. 1 is the present invention；
Fig. 2 is the steam generation heat exchanging pipe arrangement schematic diagram of the present invention；
Fig. 3 is the single arranged in series schematic diagram of single heat exchange tube in the heat storage of the present invention；
Fig. 4 is the single arranged in series schematic diagram of two heat exchanger tubes in the heat storage of the present invention；
Fig. 5 is single heat exchange tube more (two) row arranged in series schematic diagram in the heat storage of the present invention；
Fig. 6 is more (two) root heat exchanger tubes more (two) row arranged in series schematic diagram in the heat storage of the present invention；
In figure：Outlet header 1, outlet connecting pipe 2, heat storage 3, heat exchanger tube 4, the first temperature sensor 5, sealed insulating layer
6th, triple valve 7, check-valves 8, influent header 9, water circulating pump 10, flowmeter 11, switch board 12, moisturizing connecting tube 13, cistern
14th, second temperature sensor 15, three-temperature sensor 16, graphite block 17 and semicircle mounting hole 18.
Embodiment
The present invention is further elaborated and illustrated with reference to the accompanying drawings and detailed description.Each implementation in the present invention
The technical characteristic of mode can carry out respective combination on the premise of not colliding with each other.
As shown in Figure 1-2, system, including outlet header occur for a kind of sensible heat heat accumulating type live (open) steam based on regulation of series
1st, outlet connecting pipe 2, heat storage 3, heat exchanger tube 4, the first temperature sensor 5, sealed insulating layer 6, triple valve 7, check-valves 8, enter
Mouthful header 9, water circulating pump 10, flowmeter 11, switch board 12, moisturizing connecting tube 13, cistern 14, second temperature sensor 15,
Three-temperature sensor 16；The heat exchanger tube 4 of serpentine-like arrangement is installed in heat storage 3.Sealed insulating layer 6 is covered with outside heat storage 3,
Water circulating pump 10 exports to be sequentially connected through moisturizing connecting tube 13 and influent header 9, heat exchanger tube 4；Heat exchanger tube 4 is by more piece body group
Into, streamwise is sequentially installed with some triple valves 7, is connected between more piece body by triple valve 7, triple valve 7 it is another
Individual outlet is connected through outlet connecting pipe 2 with outlet header 1, and the end of heat exchanger tube 4 is by check-valves 8 through outlet connecting pipe 2 and outlet
Header 1 is connected；The entrance of water circulating pump 10 is connected with cistern 14, and the first temperature sensor 5, entrance connection are provided with heat storage 3
Second temperature sensor 15 is installed in case 9, three-temperature sensor 16 is installed in outlet header 1, in moisturizing connecting tube 13
Equipped with flowmeter 11, flowmeter 11, temperature sensor 5, triple valve 7, water circulating pump 10, the temperature of second temperature sensor the 15, the 3rd
Degree sensor 16 is connected with switch board 12 respectively.
As seen in figures 3-6, the quantity of described heat exchanger tube 4 is more than or equal to 1, and when the quantity of heat exchanger tube 4 is more than 1, every is changed
Heat pipe entrance is to be connected in parallel with influent header 9.
Described heat storage 3 is piled up by some graphite blocks 17 to be formed, and the semicircle mounting hole 18 between graphite block passes through cooperation
Circular hole is formed, then is connected with heat exchanger tube 4.
The described material of heat storage 3 is graphite, and its mode of heating includes electrical heating and Salar light-gathering heats.
The heat-exchange method of system occurs for the sensible heat heat accumulating type live (open) steam based on regulation of series described in a kind of utilization：Control
Cabinet 12 gives circular flow G according to demandallValue, so as to which the flow G of distribution in every heat exchanger tube 4 is constant, liquid water is exchanging heat
By being exchanged heat with heat storage 3 in pipe 4, produce steam and discharged through the inflow outlet header 1 of triple valve 7；At the same time, switch board 12
Triple valve 7 is controlled according to the temperature of the three-temperature sensor 16 in outlet header 1 and the first temperature sensor 5 of heat storage 3
Opening and closing quantity, so as to realize the adjustment of heat exchanging area, make the temperature of heat storage 3 reduce with heat exchange, but in heat exchanger tube 4
Heat exchange power keep it is constant, so as to ensure the parameter constant of outlet vapor；
Switch board 12 is as follows to the control method of triple valve 7：
Starting stage, control the open and-shut mode of each triple valve 7, make liquid water only by after a part for heat exchanger tube 4 i.e.
Flow into outlet header 1；Now, in the triple valve 7 of unlatching, the flow direction of only last triple valve 7 is and the phase of influent header 1
Logical, other triple valves 7 are communicated with heat exchanger tube 4；Meet following energy balance in single heat exchange tube 4：
In formula,For the overall average coefficient of heat transfer of heat exchanger tube under initial temperature 4,For heat storage starting stage mean temperature,For fluid mean temperature in single heat exchange tube, Δ H is that heat exchanger tube imports and exports fluid enthalpy difference, A0It is effective for starting stage heat exchanger tube
Heat exchange area；
The maximum fluctuation value of outlet steam temperature is set as 2 Δ T ', corresponding steam enthalpy difference is 2 Δ H '；
At any i moment, when the power in heat exchanger tube 4 reaches following relational expression (2), switch board 12, which controls, currently to be flowed to out
The triple valve 7 of mouthful header 1 is turned to so that fluid, which continues on heat exchanger tube 4 and flows to next section, to be exchanged heat, and is controlled next
Triple valve 7 leads to outlet header 1；
In formula：For the instantaneous overall average coefficient of heat transfer；For the average transient temperature of heat storage；AiIt is effective for i moment heat exchanger tubes
Heat exchange area；
Now, the effective heat exchange area of heat exchanger tube 4 by the i moment AiIncrease to the A at i+1 momenti+1So that heat exchanging relation
Meet equation below (3)：
Thus, the regulation and control of a heat exchange area are completed so that system heat exchange power keeps relative stability；
It is in course of adjustment, the length of heat exchanger tube 4 between the triple valve that the triple valve and i+1 moment that the i moment opens are opened
ΔliBetween relation be：
Wherein, Ai+1For i+1 moment heat exchanger tube effective heat exchange areas；D is the internal diameter of heat exchanger tube 4.
The specific work process of the present invention is as follows：
First, heat storage controls heater circuit to heat heat storage in the paddy electricity time by switch board so that accumulation of heat body temperature
Degree is increased in operating temperature range；Because heat storage is using graphite, there is preferable thermal conductivity factor, therefore, reheat
In exothermic process, the temperature difference of heat storage is not too large, can regard isothermal body as.
Heat storage heating is when steaming, control triple valve cause heat exchanger tube be connected with outlet header or heat exchanger tube between pass through
Logical, check-valves is opened, and avoids air expansion from causing internal pressure excessive；At work, switch board according to circular flow demand with
And first the feedback of temperature sensor judge regenerator temperature, now, what the flow in corresponding single heat exchange tube was also to determine,
Therefore controller can determine heat exchanger tube area or length according to regenerator temperature, so as to determine the unlatching quantity of triple valve and turn
To so that the pipeline between each triple valve is connected serially to last triple valve and flows to outlet header；Then, water circulating pump will store
Water in pond is transported to influent header through moisturizing connecting tube and is assigned in heat exchanger tube, starts heat exchange and produces steam, steam is through going out
Mouth header collects discharge.
Now, heat exchange power meets design conditions, i.e.,：
At the same time, as the progress of heat exchange, regenerator temperature reduce, it is assumed that the maximum fluctuation value of vapor (steam) temperature is 2 Δs
T ', corresponding steam enthalpy difference are 2 Δ H '.Switch board passes through storage according to predetermined temperature fluctuation range and corresponding enthalpy difference
Vapor (steam) temperature Two-way Feedback in hot temperature and outlet header, when the heat exchange work(in heat exchanger tube is reduced to following critical relation：
The current triple valve for flowing to outlet header of switch board control turns to so that fluid continues on heat exchanger tube flowing and changed
Heat, and control next triple valve to lead to outlet header, now, the heat exchange area of heat exchanger tube becomes Ai+1So that heat exchanging relation
Meet equation below (3)：
Now, heat-exchange system completes the regulation and control of an area so that system heat exchange power keeps relative stability.
Accordingly, it is in course of adjustment, the distance between triple valve that the triple valve that the i moment opens is opened with the i+1 moment
ΔliBetween relation be：
Wherein, d is the internal diameter of heat exchanger tube 4.
The present invention uses pipeline series connection method, solves accumulation of heat body temperature by increasing the method for heat exchange area in flow direction
The problem of average heat transfer coefficient caused by degree reduces and heat exchange power reduce.Flow in heat transfer process of the present invention in single conduit
Constant, heat transfer process is relatively easy, is easy to the design and calculating of system.
By the implementation of the present invention, the operating cost of traditional electric boiler can be effectively reduced, by calculating, using the present invention
Vapour system cost it is suitable with natural gas system, there is extensive market application foreground.
Claims (5)
1. system occurs for a kind of sensible heat heat accumulating type live (open) steam based on regulation of series, it is characterised in that including outlet header (1),
Outlet connecting pipe (2), heat storage (3), heat exchanger tube (4), the first temperature sensor (5), sealed insulating layer (6), triple valve (7),
Check-valves (8), influent header (9), water circulating pump (10), flowmeter (11), switch board (12), moisturizing connecting tube (13), water storage
Pond (14), second temperature sensor (15), three-temperature sensor (16)；Changing for serpentine-like arrangement is installed in heat storage (3)
Heat pipe (4), heat storage (3) are covered with sealed insulating layer (6) outside, and water circulating pump (10) outlet joins through moisturizing connecting tube (13) and entrance
Case (9), heat exchanger tube (4) are sequentially connected；Heat exchanger tube (4) streamwise is sequentially installed with some triple valves (7), triple valve (7)
Another outlet be connected through outlet connecting pipe (2) with outlet header (1), heat exchanger tube (4) end by check-valves (8) through outlet
Connecting tube (2) is connected with outlet header (1)；Water circulating pump (10) entrance is connected with cistern (14), and heat storage is provided with (3)
First temperature sensor (5), second temperature sensor (15) is installed in influent header (9), the is provided with outlet header (1)
Three-temperature sensor (16), is equipped with flowmeter (11) in moisturizing connecting tube (13), flowmeter (11), the first temperature sensor (5),
Triple valve (7), water circulating pump (10), second temperature sensor (15), three-temperature sensor (16) respectively with switch board (12)
It is connected.
2. system, its feature occur for a kind of sensible heat heat accumulating type live (open) steam based on regulation of series according to claim 1
It is that the quantity of described heat exchanger tube (4) is more than or equal to 1, when heat exchanger tube (4) quantity is more than 1, every heat exchange tube inlet is with entering
Mouth header (9) is to be connected in parallel.
3. system, its feature occur for a kind of sensible heat heat accumulating type live (open) steam based on regulation of series according to claim 1
Be that described heat storage (3) is piled up by some graphite blocks (17) to form, the semicircle mounting hole (18) between graphite block by with
Conjunction forms circular hole, then is connected with heat exchanger tube (4).
4. system, its feature occur for a kind of sensible heat heat accumulating type live (open) steam based on regulation of series according to claim 1
It is graphite to be described heat storage (3) material, and its mode of heating includes electrical heating and Salar light-gathering heats.
5. the heat exchange side of system occurs for a kind of sensible heat heat accumulating type live (open) steam based on regulation of series using described in claim 1
Method, it is characterised in that：Switch board (12) gives circular flow G according to demandallValue, so as to the stream of distribution in every heat exchanger tube (4)
G is measured to be constant, liquid water by being exchanged heat with heat storage (3), produces steam and exported through triple valve (7) inflow in heat exchanger tube (4)
Header (1) is discharged；At the same time, switch board (12) according to the temperature of the three-temperature sensor (16) in outlet header (1) with
And the opening and closing quantity of the first temperature sensor (5) control triple valve (7) of heat storage (3), so as to realize the tune of heat exchanging area
It is whole, make the temperature of heat storage (3) reduce with heat exchange, but the heat exchange power in heat exchanger tube (4) keeps constant, so as to ensure
The parameter constant of mouth steam；
Switch board (12) is as follows to the control method of triple valve (7)：
Starting stage, control the open and-shut mode of each triple valve (7), make liquid water only by after a part for heat exchanger tube (4) i.e.
Flow into outlet header (1)；Now, in the triple valve (7) of unlatching, the flow direction of only last triple valve (7) is joined with entrance
Case (1) is communicated, and other triple valves (7) are communicated with heat exchanger tube (4)；Meet following energy balance in single heat exchange tube (4)：
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For fluid mean temperature in single heat exchange tube, Δ H is that heat exchanger tube imports and exports fluid enthalpy difference, A0Effectively changed for starting stage heat exchanger tube
Hot area；
The maximum fluctuation value of outlet steam temperature is set as 2 Δ T ', corresponding steam enthalpy difference is 2 Δ H '；
At any i moment, when the power in heat exchanger tube (4) reaches following relational expression (2), switch board (12) control currently flows to out
The triple valve (7) of mouthful header (1) is turned to so that fluid, which continues on heat exchanger tube (4) and flows to next section, to be exchanged heat, and is controlled
Next triple valve (7) leads to outlet header (1)；
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In formula：For the instantaneous overall average coefficient of heat transfer；For the average transient temperature of heat storage；AiEffectively exchanged heat for i moment heat exchanger tubes
Area；
Now, the effective heat exchange area of heat exchanger tube (4) increases to Ai+1So that heat exchanging relation meets equation below (3)：
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<mo>)</mo>
</mrow>
</mrow>
Thus, the regulation and control of a heat exchange area are completed so that system heat exchange power keeps relative stability；
It is in course of adjustment, heat exchanger tube (4) length Δ l between the triple valve that the triple valve and i+1 moment that the i moment opens are openedi
Between relation be：
<mrow>
<msub>
<mi>&Delta;l</mi>
<mi>i</mi>
</msub>
<mo>=</mo>
<mfrac>
<mrow>
<msub>
<mi>A</mi>
<mrow>
<mi>i</mi>
<mo>+</mo>
<mn>1</mn>
</mrow>
</msub>
<mo>-</mo>
<msub>
<mi>A</mi>
<mi>i</mi>
</msub>
</mrow>
<mrow>
<mi>&pi;</mi>
<mi>d</mi>
</mrow>
</mfrac>
<mo>-</mo>
<mo>-</mo>
<mo>-</mo>
<mrow>
<mo>(</mo>
<mn>4</mn>
<mo>)</mo>
</mrow>
</mrow>
Wherein, Ai+1For i+1 moment heat exchanger tube effective heat exchange areas；D is heat exchanger tube (4) internal diameter.
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| CN107013897A (en) * | 2017-05-26 | 2017-08-04 | 山西臣功新能源科技有限公司 | A kind of accumulation of heat steam-type boiler |
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| CN111412767A (en) * | 2020-04-30 | 2020-07-14 | 中国核动力研究设计院 | Power-adjustable double-pipe heat exchanger |
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| CN112197633B (en) * | 2020-09-24 | 2024-10-15 | 北京热力装备制造有限公司 | Sensible heat storage heat exchange pipeline connection structure and method based on series-parallel connection combined adjustment |
| CN112539674B (en) * | 2021-01-06 | 2021-08-10 | 河南比福制药股份有限公司 | Metal medium energy storage heat transfer device |
| CN112923763A (en) * | 2021-01-11 | 2021-06-08 | 西安交通大学 | Cobblestone heat storage system with variable load capacity |
| CN112902708B (en) * | 2021-02-08 | 2022-06-14 | 南京慧和建筑技术有限公司 | Multi-stage temperature control method for humidifying water and humidifying method |
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