CN105953202A - Sensible heat storage type direct steam generation system and method based on series-connection adjustment - Google Patents

Sensible heat storage type direct steam generation system and method based on series-connection adjustment Download PDF

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CN105953202A
CN105953202A CN201610323747.XA CN201610323747A CN105953202A CN 105953202 A CN105953202 A CN 105953202A CN 201610323747 A CN201610323747 A CN 201610323747A CN 105953202 A CN105953202 A CN 105953202A
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heat
exchanger tube
heat exchanger
way valve
heat exchange
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CN105953202B (en
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张良
王涛
王宇飞
范利武
郑梦莲
俞自涛
胡亚才
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Zhejiang University ZJU
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Zhejiang University ZJU
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    • 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 sensible heat storage type direct steam generation system and method based on series-connection adjustment. The system comprises an outlet header, an outlet connection pipe, a heat storage body, a heat exchange pipe, a first temperature sensor, a sealed heat-preserving layer, a three-way valve, a check valve, an inlet header, a circulating water pump, a flowmeter, a control cabinet, a water supplementing connection pipe, a water storage pond, a second temperature sensor and a third temperature sensor. A pipeline series-connection method is adopted for the system, by means of the method that the heat exchange area is increased in the flowing direction, the problem that because the temperature of the heat storage body is lowered, the heat exchange coefficient and the heat exchange power are reduced is solved; and in the heat exchange process of the system, the flow in single pipelines is not changed, the heat exchange process is relatively simple, and design and calculation of the system are convenient. By means of implementation of the system, the running cost of a traditional electric boiler can be effectively lowered, after calculation, the cost generated by adopting the steam system is equivalent to that generated by adopting a natural gas system, and broad market application prospects are achieved.

Description

A kind of sensible heat heat accumulating type live (open) steam generation system and method based on regulation of series
Technical field
The present invention relates to a kind of sensible heat heat accumulating type live (open) steam generation system and method based on regulation of series, belong to In sensible heat regenerative heat exchange technical field.
Background technology
Along with energy-saving and emission-reduction strategy popularization, tradition high energy consumption, high pollution Small Coal-fired Boilers will gradually by Substituting and eliminate, this brings the huge market space to heat supply market.Currently, the heat demand in market is solved Mainly by the big thermoelecrtic unit of steam power plant, but this mechanism needs planning and the construction of long period, market Motility is poor.For the heat demand of dispersibility, natural gas boiler, electric boiler and solar boiler exist Huge development space, but natural gas boiler system exists for QI-insufficiency problem, and electrically heated boiler exists to be used The electricity the highest problem of cost, there is thermic load instability problem in solar boiler.
For the electric cost problem of electric boiler, heat storage technology is that reduction system electric cost provides well Resolving ideas, utilizes the price difference of peak-trough electricity, the operating cost of electric boiler can be reduced to natural gas horizontal, There is market application foreground widely.
But, heat storage technology includes sensible heat heat storage technology and latent-heat storage technology, and sensible heat hold over system is to utilize The thermal capacity of heat-storing material, is raised and lowered by temperature and realizes storage or the release process of heat.This is Uniting relatively simple for structure, safety in operation is higher than phase-change heat exchange system, but is primarily present and has a problem in that and change In thermal process, the temperature of heat storage constantly reduces, and causes the heat exchange power under the conditions of the identical heat exchange area of heat exchange Constantly reduce, there is the problem that output is unstable, can be only applied to field less demanding to steam parameter Close, it is impossible to meet the demand of the heat utilization system that steam parameter and output are had strict demand, such as heat supply Boiler etc..
Therefore, how to solve the problem that sensible heat transfer system heat exchange power constantly reduces, heat exchange power stability, Realize hold over system to continue in the range of bigger temperature, stably produce the steam meeting demand, become aobvious The problem needing solution in the design of thermal regenerator system badly.
Summary of the invention
For solving the problems referred to above, the present invention proposes a kind of sensible heat heat accumulating type live (open) steam based on parallel connection regulation and sends out Raw system and method.
For achieving the above object, the present invention adopts the following technical scheme that
A kind of sensible heat heat accumulating type live (open) steam generation system based on regulation of series, including outlet header, outlet Connecting tube, heat storage, heat exchanger tube, the first temperature sensor, sealed insulating layer, three-way valve, check-valves, Influent header, water circulating pump, effusion meter, switch board, moisturizing connecting tube, cistern, the second temperature sensing Device, three-temperature sensor；The heat exchanger tube of serpentine-like layout is installed in heat storage, is covered with close outside heat storage Envelope heat-insulation layer, water circulating pump outlet is sequentially connected with influent header, heat exchanger tube through moisturizing connecting tube；Heat exchanger tube Streamwise is sequentially installed with some three-way valve, and another outlet of three-way valve is through outlet connecting pipe and outlet Header is connected, and heat exchanger tube end is connected with outlet header through outlet connecting pipe by check-valves；Recirculated water pumps into Mouth is connected with cistern, and heat storage is provided with the first temperature sensor, is provided with the second temperature in influent header Degree sensor, is provided with three-temperature sensor in outlet header, equipped with effusion meter in moisturizing connecting tube, and stream Gauge, temperature sensor, three-way valve, water circulating pump, the second temperature sensor, three-temperature sensor divide It is not connected with switch board.
The quantity of described heat exchanger tube is more than or equal to 1, when heat exchanger tube quantity is more than 1, and every heat exchange tube inlet With influent header for being connected in parallel.
Described heat storage is piled up by some graphite blocks and is formed, and the semicircle installing hole between graphite block is by coordinating Form circular 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 heating.
A kind of heat exchange side utilizing described sensible heat heat accumulating type live (open) steam generation system based on regulation of series Method: switch board gives circular flow G according to demandallValue, thus in every heat exchanger tube, the flow G of distribution is permanent Fixed, liquid water in heat exchanger tube by with heat storage heat exchange, produce steam and flow into outlet header row through three-way valve Go out；Meanwhile, switch board is according to the temperature of the three-temperature sensor in outlet header and heat storage First temperature sensor controls the opening and closing quantity of three-way valve, thus realizes the adjustment of heat exchanging area, makes accumulation of heat The temperature of body reduces along with heat exchange, but the heat exchange power in heat exchanger tube keeps constant, thus ensures that outlet is steamed The parameter constant of vapour；
Switch board is as follows to the control method of three-way valve:
Starting stage, control the open and-shut mode of each three-way valve, make liquid water only by a part for heat exchanger tube After i.e. flow into outlet header；Now, in the three-way valve of unlatching, only the flow direction of last three-way valve be with Influent header communicates, and other three-way valve are then to communicate with heat exchanger tube；Following energy is met in single heat exchange tube Balance:
h 0 ‾ A 0 ( T ‾ 0 - T f ‾ ) ≅ G Δ H - - - ( 1 )
In formula,For the heat exchanger tube grand mean coefficient of heat transfer under initial temperature,Average for the heat storage starting stage Temperature,For fluid mean temperature in single heat exchange tube, Δ H is that heat exchanger tube imports and exports fluid enthalpy difference, A0For just Stage beginning heat exchanger tube effective heat exchange area；
Setting the maximum fluctuation value of outlet steam temperature as 2 Δ T ', corresponding steam enthalpy difference is 2 Δ H '；
In the arbitrarily i moment, when the power in heat exchanger tube reaches following relational expression (2), switch board controls current The three-way valve flowing to outlet header turns to so that fluid continues on heat exchanger tube and flows to next section and carry out heat exchange, And control next three-way valve and lead to outlet header；
G Δ H - h ‾ A i ( T ‾ - T f ‾ ) = GΔH ′ - - - ( 2 )
In formula:For the instantaneous grand mean coefficient of heat transfer；For the average transient temperature of heat storage；AiChange for the i moment Heat pipe effective 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):
h ‾ A i + 1 ( T ‾ - T f ‾ ) = G Δ H + GΔH ′ - - - ( 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 between three-way valve that the i moment opens and the three-way valve that the i+1 moment opens Length Δ liBetween relation be:
Δl i = A i + 1 - A i π d - - - ( 4 )
Wherein, Ai+1For i+1 moment heat exchanger tube effective heat exchange area；D is heat exchanger tube internal diameter.
Compared with prior art, the present invention is mainly characterized by:
(1) present invention uses pipeline series connection method, is solved by the method increasing heat exchange area at flow direction Certainly regenerator temperature reduces the average heat transfer coefficient and the under powered problem of heat exchange caused.
(2) present invention uses series connection method, and the flow in single conduit is constant, and heat transfer process is relatively easy, It is easy to design and the calculating of system.
(3) while the present invention is by series connection method regulation single heat exchange tube power, it is considered to parallel pipeline realizes Control to single conduit flow, extends the power adaptability of system.
(4) heat storage of the present invention uses standardization block structure so that heat storage body structure can be according to practical situation Being combined, improve adaptability, half pore structure improves the convenience installed between heat storage and pipeline.
Accompanying drawing explanation
Fig. 1 is a kind of based on regulation of series the sensible heat heat accumulating type live (open) steam generation system of the present invention；
Fig. 2 is that the steam generation heat exchanging pipe of the present invention arranges schematic diagram；
Fig. 3 be the present invention heat storage in single heat exchange tube single arranged in series schematic diagram；
Fig. 4 be the present invention heat storage in two heat exchanger tube single arranged in series schematic diagrams；
Fig. 5 be the present invention heat storage in single heat exchange tube many (two) row arranged in series schematic diagram；
Fig. 6 be the present invention heat storage in many (two) root heat exchanger tube many (two) row arranged in series schematic diagram；
In figure: outlet header 1, outlet connecting pipe 2, heat storage 3, heat exchanger tube the 4, first temperature sensor 5, Sealed insulating layer 6, three-way valve 7, check-valves 8, influent header 9, water circulating pump 10, effusion meter 11, control Cabinet 12 processed, moisturizing connecting tube 13, cistern the 14, second temperature sensor 15, three-temperature sensor 16, Graphite block 17 and semicircle installing hole 18.
Detailed description of the invention
With detailed description of the invention the present invention it is further elaborated below in conjunction with the accompanying drawings and illustrates.In the present invention respectively The technical characteristic of individual embodiment, on the premise of not colliding with each other, all can carry out respective combination.
As shown in Figure 1-2, a kind of sensible heat heat accumulating type live (open) steam generation system based on regulation of series, including going out Mouth header 1, outlet connecting pipe 2, heat storage 3, heat exchanger tube the 4, first temperature sensor 5, sealed insulating layer 6, three-way valve 7, check-valves 8, influent header 9, water circulating pump 10, effusion meter 11, switch board 12, benefit Water connecting tube 13, cistern the 14, second temperature sensor 15, three-temperature sensor 16；Heat storage 3 The heat exchanger tube 4 of serpentine-like layout is inside installed.Sealed insulating layer 6, water circulating pump 10 it is covered with outside heat storage 3 Outlet is sequentially connected with influent header 9, heat exchanger tube 4 through moisturizing connecting tube 13；Heat exchanger tube 4 is by more piece body Composition, streamwise is sequentially installed with some three-way valve 7, is connected by three-way valve 7 between more piece body, Another outlet of three-way valve 7 is connected with outlet header 1 through outlet connecting pipe 2, and heat exchanger tube 4 end passes through Check-valves 8 is connected with outlet header 1 through outlet connecting pipe 2；Water circulating pump 10 entrance and cistern 14 phase Even, heat storage 3 is provided with the first temperature sensor 5, the second temperature sensor is installed in influent header 9 15, three-temperature sensor 16 is installed in outlet header 1, equipped with effusion meter 11 in moisturizing connecting tube 13, Effusion meter 11, temperature sensor 5, three-way valve 7, water circulating pump the 10, second temperature sensor the 15, the 3rd Temperature 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, when heat exchanger tube 4 quantity is more than 1 Time, every heat exchange tube inlet with influent header 9 for being connected in parallel.
Described heat storage 3 is piled up by some graphite blocks 17 and is formed, the semicircle installing hole 18 between graphite block By cooperatively forming circular hole, then it is connected with heat exchanger tube 4.
Described heat storage 3 material is graphite, and its mode of heating includes electrical heating and Salar light-gathering heating.
A kind of heat exchange side utilizing described sensible heat heat accumulating type live (open) steam generation system based on regulation of series Method: switch board 12 gives circular flow G according to demandallValue, thus the flow G of distribution in every heat exchanger tube 4 For constant, liquid water in heat exchanger tube 4 by with heat storage 3 heat exchange, produce steam flow into through three-way valve 7 Outlet header 1 is discharged；Meanwhile, switch board 12 is according to the three-temperature sensor 16 in outlet header 1 Temperature and the first temperature sensor 5 of heat storage 3 control the opening and closing quantity of three-way valve 7, thus realize The adjustment of heat exchanging area, makes the temperature of heat storage 3 reduce along with heat exchange, but the heat exchange in heat exchanger tube 4 Power keeps constant, thus ensures the parameter constant of outlet vapor；
Switch board 12 is as follows to the control method of three-way valve 7:
Starting stage, control the open and-shut mode of each three-way valve 7, make liquid water only by the one of heat exchanger tube 4 Outlet header 1 is i.e. flowed into after part；Now, in the three-way valve 7 of unlatching, only last three-way valve 7 The flow direction is to communicate with influent header 1, and other three-way valve 7 are then to communicate with heat exchanger tube 4；At single heat exchange tube 4 Inside meet the following energy balance:
h 0 ‾ A 0 ( T ‾ 0 - T f ‾ ) ≅ G Δ H - - - ( 1 )
In formula,For heat exchanger tube under the initial temperature 4 grand mean coefficient of heat transfer,Put down for the heat storage starting stage All temperature,For fluid mean temperature in single heat exchange tube, Δ H is that heat exchanger tube imports and exports fluid enthalpy difference, A0For Starting stage heat exchanger tube effective heat exchange area；
Setting the maximum fluctuation value of outlet steam temperature as 2 Δ T ', corresponding steam enthalpy difference is 2 Δ H '；
Arbitrarily the i moment, when the power in heat exchanger tube 4 reaches following relational expression (2), switch board 12 controls The three-way valve 7 currently flowing to outlet header 1 turns to so that fluid continues on heat exchanger tube 4 and flows to next Duan Jinhang heat exchange, and control next three-way valve 7 and lead to outlet header 1；
G Δ H - h ‾ A i ( T ‾ - T f ‾ ) = GΔH ′ - - - ( 2 )
In formula:For the instantaneous grand mean coefficient of heat transfer；For the average transient temperature of heat storage；AiChange for the i moment Heat pipe effective heat exchange area；
Now, the effective heat exchange area of heat exchanger tube 4 is by the A in i momentiIncrease to the A in i+1 momenti+1So that Heat exchanging relation meets equation below (3):
h ‾ A i + 1 ( T ‾ - T f ‾ ) = G Δ H + GΔH ′ - - - ( 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 between three-way valve that the i moment opens and the three-way valve that the i+1 moment opens 4 length Δ liBetween relation be:
Δl i = A i + 1 - A i π d - - - ( 4 )
Wherein, Ai+1For i+1 moment heat exchanger tube effective heat exchange area；D is heat exchanger tube 4 internal diameter.
The specific works process of the present invention is as follows:
First, heat storage controls heater circuit to heat storage heating in the paddy electricity time by switch board so that store Hot body temperature is increased in operating temperature range；Owing to heat storage uses graphite, there is preferable heat conduction Coefficient, therefore, reheats and in exothermic process, the temperature difference of heat storage is not too large, can regard isothermal body as.
When heat storage heating is not steamed, control three-way valve and heat exchanger tube is connected with outlet header or heat exchanger tube Between through, check-valves is opened, it is to avoid air expansion causes internal pressure excessive；Operationally, switch board Feedback according to circular flow demand and the first temperature sensor judges regenerator temperature, now, accordingly Flow in single heat exchange tube also determines that, therefore controller can determine heat exchanger tube face according to regenerator temperature Amass or length, thus determine the unlatching quantity of three-way valve and turn to so that the pipeline string between each three-way valve It is coupled to last three-way valve and flows to outlet header；Subsequently, water circulating pump is by the water in cistern through moisturizing even Adapter is transported to influent header and is assigned in heat exchanger tube, starts heat exchange and produces steam, and steam converges through outlet header Collection is discharged.
Now, heat exchange power meets design conditions, it may be assumed that
P = h 0 ‾ A 0 ( T ‾ 0 - T f ‾ ) ≅ G Δ H - - - ( 1 )
Meanwhile, along with the carrying out of heat exchange, regenerator temperature reduces, it is assumed that the maximum fluctuation of vapor (steam) temperature Value is 2 Δ T ', and corresponding steam enthalpy difference is 2 Δ H '.Switch board is according to predetermined temperature fluctuation range and corresponding Enthalpy difference, by vapor (steam) temperature Two-way Feedback in regenerator temperature and outlet header, when changing in heat exchanger tube Hot merit is reduced to following critical relation:
G Δ H - h ‾ A i ( T ‾ - T f ‾ ) = GΔH ′ - - - ( 2 )
Switch board controls currently to flow to the three-way valve of outlet header and turns to so that fluid continues on heat exchange pipe flow Moving heat, and control next three-way valve and lead to outlet header, now, the heat exchange area of heat exchanger tube becomes Ai+1So that heat exchanging relation meets equation below (3):
h ‾ A i + 1 ( T ‾ - T f ‾ ) = G Δ H + GΔH ′ - - - ( 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, between three-way valve that the i moment opens and the three-way valve that the i+1 moment opens Distance, delta liBetween relation be:
Δl i = A i + 1 - A i π d - - - ( 4 )
Wherein, d is heat exchanger tube 4 internal diameter.
The present invention uses pipeline series connection method, solves to store by the method increasing heat exchange area at flow direction Average heat transfer coefficient that hot temperature reduction causes and the under powered problem of heat exchange.In heat transfer process of the present invention Flow in single conduit is constant, and heat transfer process is relatively easy, it is simple to the design of system and calculating.
By the enforcement of the present invention, can effectively reduce the operating cost of tradition electric boiler, through calculating, adopt Suitable with natural gas system with the vapour system cost of the present invention, there is market application foreground widely.

Claims (5)

1. a sensible heat heat accumulating type live (open) steam generation system based on regulation of series, it is characterised in that include Mouthful header (1), outlet connecting pipe (2), heat storage (3), heat exchanger tube (4), the first temperature sensor (5), Sealed insulating layer (6), three-way valve (7), check-valves (8), influent header (9), water circulating pump (10), Effusion meter (11), switch board (12), moisturizing connecting tube (13), cistern (14), the second temperature sensing Device (15), three-temperature sensor (16)；The heat exchanger tube (4) of serpentine-like layout is installed in heat storage (3), Being covered with sealed insulating layer (6) outside heat storage (3), water circulating pump (10) exports through moisturizing connecting tube (13) It is sequentially connected with influent header (9), heat exchanger tube (4)；Heat exchanger tube (4) streamwise is sequentially installed with Some three-way valve (7), another outlet of three-way valve (7) is through outlet connecting pipe (2) and outlet header (1) Being connected, heat exchanger tube (4) end passes through check-valves (8) through outlet connecting pipe (2) and outlet header (1) It is connected；Water circulating pump (10) entrance is connected with cistern (14), and heat storage (3) is provided with the first temperature Degree sensor (5), is provided with the second temperature sensor (15), outlet header (1) in influent header (9) Three-temperature sensor (16) is inside installed, equipped with effusion meter (11), flow in moisturizing connecting tube (13) Meter (11), temperature sensor (5), three-way valve (7), water circulating pump (10), the second temperature sensor (15), Three-temperature sensor (16) is connected with switch board (12) respectively.
A kind of sensible heat of based on regulation of series the most according to claim 1 heat accumulating type live (open) steam system System, it is characterised in 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 When 1, every heat exchange tube inlet with influent header (9) for being connected in parallel.
A kind of sensible heat of based on regulation of series the most according to claim 1 heat accumulating type live (open) steam system System, it is characterised in that described heat storage (3) is piled up by some graphite blocks (17) and formed, between graphite block Semicircle installing hole (18) by cooperatively forming circular hole, then be connected with heat exchanger tube (4).
A kind of sensible heat of based on regulation of series the most according to claim 1 heat accumulating type live (open) steam system System, it is characterised in that described heat storage (3) material is graphite, and its mode of heating includes electrical heating and the sun Can optically focused heating.
5. one kind utilizes described in claim 1 sensible heat of based on regulation of series heat accumulating type live (open) steam system The heat-exchange method of system, it is characterised in that: switch board (12) gives circular flow G according to demandallValue, thus In every heat exchanger tube (4), the flow G of distribution is constant, liquid water in heat exchanger tube (4) by with accumulation of heat Body (3) heat exchange, produces steam and flows into outlet header (1) discharge through three-way valve (7)；Meanwhile, control Cabinet processed (12) is according to the temperature of the three-temperature sensor (16) in outlet header (1) and heat storage (3) The first temperature sensor (5) control the opening and closing quantity of three-way valve (7), thus realize heat exchanging area Adjust, make the temperature of heat storage (3) reduce along with heat exchange, but the heat exchange power in heat exchanger tube (4) is protected Hold constant, thus ensure the parameter constant of outlet vapor；
Switch board (12) is as follows to the control method of three-way valve (7):
Starting stage, control the open and-shut mode of each three-way valve (7), make liquid water only by heat exchanger tube (4) A part after i.e. flow into outlet header (1)；Now, in the three-way valve (7) of unlatching, only last The flow direction of three-way valve (7) is to communicate with influent header (1), and other three-way valve (7) are then and heat exchanger tube (4) Communicate；The following energy balance is met in single heat exchange tube (4):
h 0 ‾ A 0 ( T ‾ 0 - T f ‾ ) ≅ G Δ H - - - ( 1 )
In formula,For heat exchanger tube under initial temperature (4) the grand mean coefficient of heat transfer,For the 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, A0 For starting stage heat exchanger tube effective heat exchange area；
Setting the maximum fluctuation value of outlet steam temperature as 2 Δ T ', corresponding steam enthalpy difference is 2 Δ H '；
The arbitrarily i moment, when the power in heat exchanger tube (4) reaches following relational expression (2), switch board (12) The three-way valve (7) controlling currently to flow to outlet header (1) turns to so that fluid continues on heat exchanger tube (4) Flow to next section and carry out heat exchange, and control next three-way valve (7) and lead to outlet header (1)；
G Δ H - h ‾ A i ( T ‾ - T f ‾ ) = GΔH ′ - - - ( 2 )
In formula:For the instantaneous grand mean coefficient of heat transfer；For the average transient temperature of heat storage；AiChange for the i moment Heat pipe effective heat exchange area；
Now, the effective heat exchange area of heat exchanger tube (4) increases to Ai+1So that heat exchanging relation meets following public Formula (3):
h ‾ A i + 1 ( T ‾ - T f ‾ ) = G Δ H + GΔH ′ - - - ( 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 between three-way valve that the i moment opens and the three-way valve that the i+1 moment opens (4) length Δ liBetween relation be:
Δl i = A i + 1 - A i π d - - - ( 4 )
Wherein, Ai+1For i+1 moment heat exchanger tube effective heat exchange area；D is heat exchanger tube (4) internal diameter.
CN201610323747.XA 2016-05-16 2016-05-16 System and method occurs for a kind of sensible heat heat accumulating type live (open) steam based on regulation of series Active CN105953202B (en)

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CN107023993A (en) * 2017-05-22 2017-08-08 吉林省电力科学研究院有限公司 A kind of electric heat storage boiler of high-efficiency environment friendly solid
CN107490201A (en) * 2017-08-17 2017-12-19 江苏启能新能源材料有限公司 A kind of heat-storing warehouse with thermal source adjusting means
CN107726905A (en) * 2017-09-27 2018-02-23 北京工业大学 Horizontal-type high temperature storage heating equipment and application method
CN107906490A (en) * 2017-11-08 2018-04-13 湖南力和海得热能技术有限公司 A kind of flue gas waste heat recovery vapo(u)rization system
CN111412767A (en) * 2020-04-30 2020-07-14 中国核动力研究设计院 Power-adjustable double-pipe heat exchanger
CN112539674A (en) * 2021-01-06 2021-03-23 河南比福制药股份有限公司 Metal medium energy storage heat transfer device
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CN112923763A (en) * 2021-01-11 2021-06-08 西安交通大学 Cobblestone heat storage system with variable load capacity
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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
CN114251640A (en) * 2020-09-22 2022-03-29 广东美的环境电器制造有限公司 Heating method and device for steam generator, steam appliance and storage medium
CN114251640B (en) * 2020-09-22 2023-09-12 广东美的环境电器制造有限公司 Heating method and device for steam generating device, steam appliance and storage medium
CN112539674A (en) * 2021-01-06 2021-03-23 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
CN112902708A (en) * 2021-02-08 2021-06-04 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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