CN110059388A - Parameter distribution modeling and simulating method of nuclear power plant's condenser along Working fluid flow direction - Google Patents
Parameter distribution modeling and simulating method of nuclear power plant's condenser along Working fluid flow direction Download PDFInfo
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- CN110059388A CN110059388A CN201910284801.8A CN201910284801A CN110059388A CN 110059388 A CN110059388 A CN 110059388A CN 201910284801 A CN201910284801 A CN 201910284801A CN 110059388 A CN110059388 A CN 110059388A
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Abstract
The present invention is to provide a kind of nuclear power plant's condensers along the parameter distribution modeling and simulating method in Working fluid flow direction.According to practical condenser structure parameter, initial parameter, the input parameter for condenser along Working fluid flow direction is determined；According to practical condenser structure and internal flow heat transfer process, actual physics boundary, region division is carried out to condenser simulation model；By nuclear power plant's condenser along Working fluid flow direction mean parameter Simulation Calculation and Integral Processing computation model；Condenser is established along working medium directioin parameter distributed simulation computation model and carries out simulation calculation；Calculating parameter is exported, arbitrary parameter of the acquisition condenser along Working fluid flow direction is distributed and its dynamic change at any time.The present invention is not relying on specific type, apparatus-form, the parameter values of any specific nuclear power plant's condenser, can be modeled and be emulated for various nuclear power plant's condenser apparatus under normal circumstances, have the good scope of application and versatility.
Description
Technical field
The present invention relates to one kind to carry out modeling and simulating method to nuclear power plant's condenser.
Background technique
Nuclear power plant's condenser is the important component in secondary circuit steam-water circulation system.Condenser comes from vapour for receiving
Steam discharge is carried out cooling condensation, steam generation is entered after feed-water heater, oxygen-eliminating device heating for multiple times by the steam discharge of turbine
Device.Cold source of nuclear power plant's condenser as secondary coolant circuit system has important role, the operation shape of condenser to nuclear power plant's operation
State will significantly impact the generating efficiency of nuclear power plant.Nuclear power plant's condenser internal physical process is complex, generally for core
The Simulation Modeling of power plant condenser is all often to carry out calculating research in the form of lumped-parameter method or control volume divide,
The division of these positions and control volume is often fixation, leads to position or any interior location required for being difficult to obtain sometimes
Parameter.Meanwhile in these simulation models, due to fixed position and control volume zoned format, condensation can only be often calculated
The parameter of device specific position, the case where can not reflecting univers parameter distribution character inside condenser.For different model, parameter
There may be nuclear power plant's condensers of variation, it is however generally that the simulation model versatility established is poor, can not carry out simply
Modification after be used for different condenser apparatus, often require to re-start modeling and emulate, so that it is imitative to will affect modeling
Genuine efficiency extends the modeling and simulating period, will also result in influence for nuclear power plant's total system modeling and simulation.
Summary of the invention
The purpose of the present invention is to provide a kind of nuclear power plant's condensers with the good scope of application and versatility along work
The parameter distribution modeling and simulating method of matter flow direction.
The object of the present invention is achieved like this:
Step 1: it according to practical condenser structure parameter, initial parameter, determines for condenser along Working fluid flow direction
Input parameter；
Step 2: according to practical condenser structure and internal flow heat transfer process, actual physics boundary, condenser is emulated
Model carries out region division；Through nuclear power plant's condenser along Working fluid flow direction mean parameter Simulation Calculation and integral
Manage computation model；Condenser is established along working medium directioin parameter distributed simulation computation model and carries out simulation calculation；
Step 3: output calculating parameter, obtain condenser along Working fluid flow direction arbitrary parameter distribution and its at any time
Dynamic change.
The present invention may also include:
1. condenser structure parameter specifically includes that
Condenser overall dimensions parameter: condenser height, condenser width, condenser length, inside tube bank dimensional parameters:
Heat exchanger tube diameter, heat exchanger tube length, heat-exchanging tube bundle height, heat exchange tube spacing, heat exchange area, hot trap dimensional parameters: hot trap height,
Hot trap volume；
Condenser initial parameter includes: steam turbine exhaust pressure, turbine discharge mass dryness fraction, turbine discharge enthalpy, steamer
Machine exhaust steam flow, cooling water inlet temperature, cooling water inlet enthalpy, cooling water flow；
The determination refers to for input parameter of the condenser along Working fluid flow direction: condenser overall dimensions parameter and cold
Condenser initial parameter is used as the boundary parameter of condenser simulation model simultaneously, by changing condenser boundary ginseng in simulation process
Number realizes that condenser dynamic parameter calculates, as nuclear power plant along the input of the parameter distribution modeling and simulating in Working fluid flow direction.
Described in 2. according to practical condenser structure and internal flow heat transfer process, actual physics boundary, it is imitative to condenser
True mode carries out region division and specifically includes:
It is specifically divided into shell-side steam condensing zone, the cooling pool in pipe side and hot trap area, these three regions are all in simulation model
It is corresponding with a part of region in practical nuclear power plant's condenser apparatus, fluid interchange calculating process and other in each region
Region is different, selects several parameter calculating positions according to demand respectively in shell-side steam condensing zone and Guan Ce cooling water area,
In hot trap area using hot trap liquid level position as parameter calculating position.
By nuclear power plant's condenser along Working fluid flow direction mean parameter Simulation Calculation and Integral Processing described in 3.
Computation model, specifically:
In shell-side steam condensing zone using steam inlet position as simulation modeling starting point, it is with condenser tube row's extreme lower position
Simulation modeling terminal, wherein selected any position is parameter position to be asked；In known inlet steam boundary parameter,
It is handled with mean parameter computation model and Integral Processing computation model, by partial differential equation to the local derviation number form of spatial position
Formula is converted into quantic, converts the partial differential equation about two parameters in spatial position and time to about only with respect to the time
ODE, wherein contain the quantic about spatial position, to obtain about required state parameter, packet
Include power pressure, working medium steam quality, Temperature of Working different spatial expression formula and emulated；Shell-side steam condensing zone
Parameter position arbitrarily to be asked is with any indefinite quantity, to emulate shell-side steam condensing zone distribution parameter estimated performance；
Starting point is modeled for the simulation of domain with cooling water inlet position in the cooling pool in pipe side, with cooling water outlet position
Terminal is modeled for the simulation of domain, wherein any position is parameter position to be asked, in known import cooling water boundary parameter, with flat
Equal parameter computation model and Integral Processing computation model are handled；For the parameter along shell-side flow direction any position,
About in the partial differential equation of time and spatial position, algebra will be converted into about the space position parameter along Working fluid flow direction
Form carries out dynamic process to the state parameter of pipe side any position, including pipe side Temperature of Working, pressure and other arbitrary parameters
Emulation；The cooling water area in pipe side is supercooling water state, is handled at least two state parameters, the cooling pool in pipe side arbitrarily to
Asking parameter position is any indefinite quantity, to emulate Guan Ce cooling water area characteristics of distributed parameters；
Starting point is modeled for the simulation of domain with pipe row's extreme lower position in hot trap area, with the outlet of condenser condensate for the region
Simulation modeling terminal, hot trap liquid level position are parameter position to be asked；Mainly hot trap area liquid level is emulated in hot trap area, will be closed
It is converted into the ODE about time single parameter in the partial differential equation of two parameters of time and liquid level, thus to hot trap
Area's liquid level is emulated.
4. described establish condenser along working medium directioin parameter distributed simulation computation model and carry out simulation calculation, specifically:
It is calculated simultaneously comprising shell-side steam condensation in shell-side steam condensing zone, on-condensible gas calculates and liquid film conductometer
It calculates, pipe side is calculated comprising the heat exchange of pipe side single-phase flow simultaneously in cooling pool, metal pipe-wall heat exchange calculates, in the two regions
Distinguish while carrying out heat transfer flow calculating according to selected and specified spatial position, according to simultaneously bond area zoned format and
Each region calculated relationship constructs three simulation of domain computation models to nuclear power plant's condenser simulation model respectively, is being imitated
By successively being called when true calculating, wherein there are parameter transitive relation, shells in shell-side steam condensing zone and pipe side cooling pool
Side steam condensing zone and hot trap area collectively form Simulation Calculation there are parameter transitive relation.
5. exporting calculating parameter, arbitrary parameter of the acquisition condenser along Working fluid flow direction is distributed and its dynamic at any time
Variation specifically includes:
Constructed condenser parameter distribution simulation model, carries out in a time step to each region calculating section
Calling, according to set calculating and calling sequence, realize dynamic real-time simulator calculate, and combine spatial position and time structure
At output, according to calculating, to obtain shell-side steam condensing zone temperature, pressure, mass dryness fraction, enthalpy, flow dynamic with spatial position and time
State Parameters variation situation, the cooling pool temperature in pipe side, pressure, enthalpy, flow etc. become with the dynamic parameter of spatial position and time
Change situation, hot trap area liquid level, temperature, pressure, enthalpy, flow are with spatial position and the dynamic parameter situation of change of time.
The present invention relates to the condenser in greenhouse PWR nuclear power plant secondary coolant circuit system, and in particular to can be right to one kind
The emulation mode that nuclear power plant's condenser is effectively modeled, it is special which is based on the fluid interchange of condenser internal working medium
Property and actual physics process, can it is good, any position parameter inside condenser is accurately calculated, effectively reflect that nuclear power plant is cold
Condenser parameter distribution characteristic and dynamic operational behaviour meet for the Design and optimization of nuclear power plant's condenser, assessment, demonstration etc. no
Same emulation demand.
It is different from traditional nuclear power plant's condenser modeling and simulating method, the purpose of the present invention is to provide one kind can be improved
Nuclear power plant's design of condenser and computational efficiency, the parameter distribution modeling and simulating method based on internal actual physics process.The modeling
Emulation mode and constructed simulation model can effectively improve the modeling and simulating efficiency of nuclear power plant's condenser, based on internal practical
Physical process, with nuclear power plant's condenser simulation model along Working fluid flow directioin parameter distribution character can be more accurate it is anti-
Answer the parameter distribution situation and dynamic state of parameters situation of change of any position inside practical nuclear power plant's condenser.The present invention is not relying on
Specific type, apparatus-form, the parameter values of any specific nuclear power plant's condenser, can be for various nuclear powers under normal circumstances
Factory's condenser apparatus is modeled and is emulated, and can be convenient use in nuclear power plant system modeling and simulation, is had good suitable
With range and versatility.
Beneficial effects of the present invention are as follows:
The present invention is by being divided into shell-side steam condensing zone, pipe side cooling pool, three, hot trap area for nuclear power plant's condenser
Region, three regions are divided in three regions all using the practical fluid interchange process in condenser inside, physical boundary as partitioning standards
Condenser inner parameter is not calculated according to along Working fluid flow direction, is met to condenser along any position in Working fluid flow direction
The calculating demand of the parameters combination spatial position such as pressure, temperature, flow, enthalpy for setting distribution.It can effectively mention through the invention
The design research and development and modeling and simulating efficiency of high nuclear power plant's condenser promote being applicable in for established nuclear power plant's condenser simulation model
Range.The simulation model established can satisfy the difference such as the Design and optimization for different type nuclear power plant condenser, assessment and need
It asks, simulation result effectively the parameter distribution to nuclear power plant's condenser and dynamic characteristic can carry out simulation calculation, obtain condensation
Any position parameter and dynamic state of parameters situation of change inside device.The condenser simulation model established through the invention can be used as
A basic unit in nuclear power plant's analogue system uses.
Detailed description of the invention
Fig. 1 nuclear power plant condenser is along Working fluid flow direction modeling and simulating method flow diagram.
The division of Fig. 2 nuclear power plant condenser region, calculating position schematic diagram.
Fig. 3 nuclear power plant condenser Simulation Calculation schematic diagram.
Specific embodiment
It illustrates below and the present invention is described in more detail.
Nuclear power plant's condenser of the invention along Working fluid flow direction parameter distribution modeling and simulating method, first according to reality
Condenser structure parameter, initial parameter etc. determine the input parameter for condenser along Working fluid flow direction.Then, according to reality
Condenser structure and internal flow heat transfer process, actual physics boundary carry out region division to condenser simulation model.Pass through core
Power plant condenser along Working fluid flow direction mean parameter Simulation Calculation and Integral Processing computation model, establish condenser edge
Working medium directioin parameter distributed simulation computation model.Finally calculating parameter is exported, obtains condenser along Working fluid flow direction
Arbitrary parameter distribution and its dynamic change at any time.Particular content is as follows:
1. practical condenser structure parameter, initial parameter input parameter as condenser, comprising:
Condenser structure parameter is mainly contained about condenser overall dimensions parameter: condenser height, condenser width,
Condenser length, inside tube bank dimensional parameters: heat exchanger tube diameter, heat-exchanging tube bundle height, heat exchange tube spacing, is changed at heat exchanger tube length
Heat area, hot trap dimensional parameters: hot trap height, hot trap volume.Condenser initial parameter includes: steam turbine exhaust pressure, steamer
Machine steam discharge mass dryness fraction, turbine discharge enthalpy, turbine discharge flow, cooling water inlet temperature, cooling water inlet enthalpy, cooling water
Flow.These initial parameters are used as the boundary parameter of condenser simulation model simultaneously, by changing condenser in simulation process
Boundary parameter realizes that condenser dynamic parameter calculates.Parameter distribution modeling above as nuclear power plant along Working fluid flow direction is imitative
The input of true method.
2. being drawn according to condenser structure and internal flow heat transfer process, actual physics boundary to condenser simulation model
Divide as follows:
According to practical fluid interchange process and actual boundary inside nuclear power plant's condenser, when carrying out modeling and simulating by its institute
Corresponding nuclear power plant's condenser simulation model carries out region division.Specifically it is divided into shell-side steam condensing zone, the cooling pool in pipe side
With hot trap area.These three regions can be corresponding with a part of region in practical nuclear power plant's condenser apparatus in simulation model,
The fluid interchange calculating process in each region and other regions are different, divide also according to actual physics process, structure
Boundary, in this, as the foundation of these three region divisions.Wherein according to the demand of calculating, spatial position required for selecting is carried out
Parameter calculates.Several parameter calculating positions are selected according to demand respectively in shell-side steam condensing zone and Guan Ce cooling water area, in heat
Well region is using hot trap liquid level position as parameter calculating position.
3. being handled according to mean parameter computation model and Integral Processing computation model, specifically along Working fluid flow direction
Are as follows:
In shell-side steam condensing zone using steam inlet position as simulation modeling starting point, it is with condenser tube row's extreme lower position
Simulation modeling terminal, wherein selected any position is parameter position to be asked.In known inlet steam boundary parameter,
It is handled with mean parameter computation model and Integral Processing computation model, in mathematical model, by by partial differential equation pair
The partial derivative form of spatial position is converted into quantic, can be by the partial differential equation about two parameters in spatial position and time
It is converted into about the ODE only with respect to the time, wherein the quantic about spatial position is contained, to obtain pass
In required state parameter, including power pressure, working medium steam quality, Temperature of Working etc. different spatial expression formula simultaneously
It is emulated.Shell-side steam condensing zone parameter position arbitrarily to be asked is with any indefinite quantity, to emulate shell-side steam condensing zone
Distribution parameter estimated performance.
Starting point is modeled for the simulation of domain with cooling water inlet position in the cooling pool in pipe side, with cooling water outlet position
Terminal is modeled for the simulation of domain, wherein any position is parameter position to be asked, in known import cooling water boundary parameter, with flat
Equal parameter computation model and Integral Processing computation model are handled.Likewise, for along shell-side flow direction any position
Parameter will turn in the partial differential equation about the time and spatial position about the space position parameter along Working fluid flow direction
Quantic is turned to, it can be to the state parameter of pipe side any position, including pipe side Temperature of Working, pressure and other arbitrary parameters
Carry out dynamic process simulation.With shell-side different from, the cooling water area in pipe side is supercooling water state, it is therefore desirable to at least
Two state parameters, such as pressure and temperature carry out treatment thereto, can emulate to other parameters.Pipe side cools down pool
Parameter position arbitrarily to be asked is any indefinite quantity, to emulate Guan Ce cooling water area characteristics of distributed parameters.
Starting point is modeled for the simulation of domain with pipe row's extreme lower position in hot trap area, with the outlet of condenser condensate for the region
Simulation modeling terminal, hot trap liquid level position are parameter position to be asked.Its treatment process is similar to two above region, in hot trap area
Mainly hot trap area liquid level is emulated, converts the partial differential equation about two parameters of time and liquid level to about time list
The ODE of one parameter, to be emulated to hot trap area liquid level.
4. condenser is established along working medium directioin parameter distributed simulation computation model and carries out simulation calculation, specifically:
Contain the calculating of shell-side steam condensation, on-condensible gas calculating and liquid film conductometer simultaneously in shell-side steam condensing zone
It calculates, contains pipe side single-phase flow heat exchange calculating in the cooling pool in pipe side simultaneously, metal pipe-wall heat exchange calculates.The two regions
These heat transfer flow calculating are distinguished while being carried out in the selected and specified spatial position of interior basis, ensure that simulation calculation when
Between on consistency.According to and in conjunction with area above zoned format and each region calculated relationship, nuclear power plant's condenser is emulated
Model constructs three simulation of domain computation models respectively, and when carrying out simulation calculation by successively being called, wherein shell-side steams
There are parameter transitive relation, shell-side steam condensing zone and hot trap area, there are parameter transmitting to close in vapour condensing zone and pipe side cooling pool
System, collectively forms Simulation Calculation.
5. a pair calculating parameter exports, condenser is obtained along the parameter distribution in Working fluid flow direction, specifically:
Constructed condenser parameter distribution simulation model, carries out in a time step to each region calculating section
Calling, according to set calculating and calling sequence, realize dynamic real-time simulator calculate, and combine spatial position and time structure
At output.Shell-side steam condensing zone temperature, pressure, mass dryness fraction, enthalpy, flow etc. are obtained with spatial position and time according to calculating
Dynamic parameter situation of change, the cooling pool temperature in pipe side, pressure, enthalpy, flow etc. are with spatial position and the dynamic parameter of time
Situation of change, hot trap area liquid level, temperature, pressure, enthalpy, flow etc. are with spatial position and the dynamic parameter situation of change of time.
In conjunction with Fig. 1 modeling and simulating flow diagram to nuclear power plant's condenser along Working fluid flow direction parameter distribution emulate
Modeling method is illustrated.
According to actual physics process inside nuclear power plant's condenser, there are some required input ginsengs when carrying out simulation calculation
Number, input parameter mainly includes structural parameters, initial parameter, boundary parameter etc., these parameters are set in nuclear power plant's condenser
The parameter that the meter stage must provide.The determination for carrying out condenser simulation model input parameter first, inputs parameter list such as table 1
It is shown.In dynamic simulation, boundary parameter, that is, initial parameter can change.
1 nuclear power plant's condenser simulation model of table inputs table
According to practical fluid interchange process and actual physics boundary inside nuclear power plant's condenser, when being emulated, by it
It is divided into shell-side vapour condesation zone, pipe side cooling pool, three, hot trap area region, and determines that the modeling along Working fluid flow direction is imitative
True starting point and terminal.In the cooling pool of shell-side steam condensing zone and pipe side, if required for being set according to actual emulation demand
Dry calculating position, hot trap area is using hot trap liquid level position as calculating position, as shown in Figure 2.In Fig. 2,1 is shell-side steam condensation
Area, 2 be condenser shell-side inlet/turbine discharge, 3 be shell-side steam condensing zone starting point, 4 be shell-side any given position, 5
It is the cooling pool in pipe side for shell-side steam condensing zone terminal, 6,7 be cooling water inlet, 8 be the cooling pool starting point in pipe side, 9 is pipe
Side any given position, 10 be the cooling pool terminal in pipe side, 11 be cooling water outlet, 12 be hot trap area, 13 be hot trap liquid level, 14
It is condensation-water drain for condenser overall length, 15,16 be shell-side flow direction, 17 is pipe side flow direction.
After carrying out region division and calculating position setting, according to mean parameter computation model and Integral Processing computation model
Processing emulation is carried out to required parameter, procedure parameter is handled using mean parameter computation model, at integral
Reason computation model handles state parameter, is classified as follows shown in table:
2 condenser procedure parameter of table and state parameter
Mean parameter computation model is as follows:
For the space average parameter along Working fluid flow direction, from working medium entrance location to region in any given position into
Row average integral has following processing form:
In formula:To indicate that process averages parameter, the p such as enthalpy, density indicate the actual procedure parameter in position to be asked, LiFor
Position along Working fluid flow direction apart from import, for parameter position to be asked, z is Working fluid flow direction coordinate；In subscript, 0 is indicated
Zone inlet position, i are indicated apart from imported LiAny position, for indicating condenser interior zone any position.
Integral Processing computation model is as follows:
For the state parameter along Working fluid flow direction any position, from working medium entrance location to region in any position,
By original partial differential equation from 0 position (entry position) to the position i (calculating position), carried out at integral for spatial position
Reason, is converted into a certain state parameter only with respect to the ODE of time parameter, wherein including the algebra shape about spatial position
Formula, processing form are as follows:
In formula: f is about state parameters such as pressure, mass dryness fraction, temperature, liquid levels, and t is simulation time, and Δ t is time step, n
For time step calculation times, p1, p2... ... it is calculating process parameter.
In two above computation model, convert the partial differential equation about two parameters of time and spatial position to only
About the ODE of time, wherein by quantic is converted into about the space position parameter along Working fluid flow direction, it is right
Dynamic process simulation is carried out to any required parameter in any required position, get parms the output changed over time.It is cold
The parameter of any position all obtains specific parameter expression form using above-mentioned calculation method in three regions inside condenser.
The calculating of shell-side steam condensation is carried out simultaneously in shell-side steam condensing zone, on-condensible gas calculates, liquid film heat conduction, pipe
Single-phase flow calculating, metal pipe-wall heat conduction in pipe are carried out in the cooling pool in side simultaneously.Hot trap area is related to vehicle repair major volume
It is calculated with liquid level.Thus three regions divided can the band of position corresponding with practical nuclear power plant's condenser it is corresponding, simultaneously
Simulation calculation in each region is in accordance with practical nuclear power plant's condenser internal physical process and carries out, and all calculating are at one
Between in step-length respectively simultaneously, synchronous carry out.In conjunction with input parameter, mean parameter computation model, Integral Processing computation model, to shell
The cooling pool of side steam condensing zone and pipe side is emulated.For the cooling pool of shell-side steam condensing zone and pipe side, according to emulation
Demand, set in condenser simulation model along Working fluid flow direction several positions and set, to wherein procedure parameter and
State parameter is emulated.The parameter distribution situation along Working fluid flow direction is obtained by simulation calculation.Change in boundary condition
In the case where change, the parameter calculating of different location can all be changed correspondingly, to complete the dynamic of condenser inner parameter at any time
Simulation process.Shell-side steam condensing zone, the cooling pool in pipe side and the hot trap divided according to actual physics process inside condenser
Three, area region, in conjunction with above-mentioned mean parameter computation model and Integral Processing computation model, wherein to steam condensing zone, hydrophobic
Cooling zone calculate along the parameters simulation in Working fluid flow direction, is substantially carried out vehicle repair major liquid level simulating to hot trap area and calculates,
In conjunction with the heat transfer flow calculated relationship of each region, collectively as Simulation Calculation, each region calculate between there are parameters
Transitive relation, specific calculation process and parameter transitive relation are as shown in Figure 3.
Constructed condenser parameter distribution Simulation Calculation carries out calculating each region in a time step
Partial calling, according to set calculating and calling sequence, dynamic real-time simulator calculating can be carried out, in conjunction with spatial position and when
Between constitute output.Required parameter etc. is obtained with spatial position and the dynamic parameter situation of change of time, parameter according to calculating
It is as shown in table 3 to export table.
3 nuclear power plant's condenser simulation model of table exports table
For with different form, different structure, different parameters nuclear power plant's condenser, the present invention can be to these feelings
Condenser with identical fluid interchange process under condition carries out simulation modeling, while having the input parameter, just of the same category
Beginning parameter etc., computation sequence and parameter transitive relation are still consistent.Mould is emulated by parameter distribution nuclear power plant condenser
The output result that type calculates can in real time, accurately react the parameter distribution situation of corresponding region in practical nuclear power plant's condenser,
Especially steam condensing zone and drain cooling zone, calculating output result carry out any along Working fluid flow direction position as needed
Parameter calculate, can more suitably react the dynamic operational behaviour and parameter distribution situation of nuclear power plant's condenser.
It should be noted that the above embodiments are only used to illustrate the present invention, and not limitation of the present invention, related skill
The those of ordinary skill in art field, without departing from the spirit and scope of the present invention, can also make a variety of changes and
Modification, therefore all equivalent technical solutions also belong to scope of the invention, scope of patent protection of the invention should be wanted by right
Ask restriction.
Claims (6)
1. a kind of nuclear power plant's condenser is along the parameter distribution modeling and simulating method in Working fluid flow direction, it is characterized in that:
Step 1: according to practical condenser structure parameter, initial parameter, the input for condenser along Working fluid flow direction is determined
Parameter；
Step 2: according to practical condenser structure and internal flow heat transfer process, actual physics boundary, to condenser simulation model
Carry out region division；By nuclear power plant's condenser along Working fluid flow direction mean parameter Simulation Calculation and Integral Processing meter
Calculate model；Condenser is established along working medium directioin parameter distributed simulation computation model and carries out simulation calculation；
Step 3: output calculating parameter obtains condenser along the arbitrary parameter distribution in Working fluid flow direction and its moving at any time
State variation.
2. nuclear power plant's condenser according to claim 1 is along the parameter distribution modeling and simulating method in Working fluid flow direction,
It is characterized in that condenser structure parameter specifically includes that
Condenser overall dimensions parameter: condenser height, condenser width, condenser length, inside tube bank dimensional parameters: heat exchange
Pipe diameter, heat exchanger tube length, heat-exchanging tube bundle height, heat exchange tube spacing, heat exchange area, hot trap dimensional parameters: hot trap height, hot trap
Volume；
Condenser initial parameter includes: steam turbine exhaust pressure, turbine discharge mass dryness fraction, turbine discharge enthalpy, steam turbine row
Steam flow amount, cooling water inlet temperature, cooling water inlet enthalpy, cooling water flow；
The determination refers to for input parameter of the condenser along Working fluid flow direction: condenser overall dimensions parameter and condenser
Initial parameter is used as the boundary parameter of condenser simulation model simultaneously, by changing condenser boundary parameter in simulation process,
Realize that condenser dynamic parameter calculates, as nuclear power plant along the input of the parameter distribution modeling and simulating in Working fluid flow direction.
3. nuclear power plant's condenser according to claim 1 is along the parameter distribution modeling and simulating method in Working fluid flow direction,
It is characterized in described according to practical condenser structure and internal flow heat transfer process, actual physics boundary, mould is emulated to condenser
Type carries out region division and specifically includes:
Specifically be divided into shell-side steam condensing zone, the cooling pool in pipe side and hot trap area, in simulation model these three regions all with reality
A part of region in border nuclear power plant condenser apparatus is corresponding, fluid interchange calculating process and other regions in each region
It is different, several parameter calculating positions are selected according to demand respectively in shell-side steam condensing zone and Guan Ce cooling water area, in heat
Well region is using hot trap liquid level position as parameter calculating position.
4. nuclear power plant's condenser according to claim 1 is along the parameter distribution modeling and simulating method in Working fluid flow direction,
It is characterized in the calculating along Working fluid flow direction mean parameter Simulation Calculation and Integral Processing by nuclear power plant's condenser
Model, specifically:
It is emulation with condenser tube row's extreme lower position in shell-side steam condensing zone using steam inlet position as simulation modeling starting point
Terminal is modeled, wherein selected any position is parameter position to be asked；In known inlet steam boundary parameter, with flat
Equal parameter computation model and Integral Processing computation model are handled, and partial derivative form of the partial differential equation to spatial position is turned
Quantic is turned to, converts the partial differential equation about two parameters in spatial position and time to about normal only with respect to the time
The differential equation, wherein the quantic about spatial position is contained, to obtain about required state parameter, including work
Matter pressure, working medium steam quality, Temperature of Working different spatial expression formula and emulated；Shell-side steam condensing zone is any
Parameter position to be asked is with any indefinite quantity, to emulate shell-side steam condensing zone distribution parameter estimated performance；
Starting point is modeled for the simulation of domain with cooling water inlet position in the cooling pool in pipe side, being with cooling water outlet position should
Simulation of domain models terminal, and wherein any position is parameter position to be asked, in known import cooling water boundary parameter, with average ginseng
Number computation model and Integral Processing computation model are handled；For the parameter along shell-side flow direction any position, about
In the partial differential equation of time and spatial position, algebra shape will be converted into about the space position parameter along Working fluid flow direction
Formula carries out dynamic process and imitates to the state parameter of pipe side any position, including pipe side Temperature of Working, pressure and other arbitrary parameters
Very；The cooling water area in pipe side is supercooling water state, is handled at least two state parameters, and the cooling pool in pipe side is arbitrarily wait ask
Parameter position is any indefinite quantity, to emulate Guan Ce cooling water area characteristics of distributed parameters；
Starting point is modeled for the simulation of domain with pipe row's extreme lower position in hot trap area, with the outlet of condenser condensate for the simulation of domain
Terminal is modeled, hot trap liquid level position is parameter position to be asked；Mainly hot trap area liquid level is emulated in hot trap area, will about when
Between and the partial differential equation of two parameters of liquid level be converted into the ODE about time single parameter, thus to hot trap area liquid
Position is emulated.
5. nuclear power plant's condenser according to claim 1 is along the parameter distribution modeling and simulating method in Working fluid flow direction,
Be characterized in it is described establish condenser along working medium directioin parameter distributed simulation computation model and carry out simulation calculation, specifically:
It is calculated simultaneously comprising shell-side steam condensation in shell-side steam condensing zone, on-condensible gas calculates and liquid film heat conduction, pipe
Side is calculated comprising the heat exchange of pipe side single-phase flow simultaneously in cooling pool, metal pipe-wall heat exchange calculates, basis in the two regions
Heat transfer flow calculating is distinguished while being carried out in selected and specified spatial position, according to simultaneously bond area zoned format and each
Region calculated relationship constructs three simulation of domain computation models to nuclear power plant's condenser simulation model respectively, is carrying out emulation meter
By successively being called when calculation, wherein there are parameter transitive relation, shell-side steams in shell-side steam condensing zone and pipe side cooling pool
Vapour condensing zone and hot trap area collectively form Simulation Calculation there are parameter transitive relation.
6. nuclear power plant's condenser according to claim 1 is along the parameter distribution modeling and simulating method in Working fluid flow direction,
It is characterized in exporting calculating parameter, arbitrary parameter of the acquisition condenser along Working fluid flow direction is distributed and its dynamic change at any time
It specifically includes:
Constructed condenser parameter distribution simulation model, carries out the tune to each region calculating section in a time step
With according to set calculating and calling sequence, realization dynamic real-time simulator is calculated, and it is defeated to combine spatial position and time to constitute
Out, shell-side steam condensing zone temperature, pressure, mass dryness fraction, enthalpy, flow is obtained according to calculating to join with the dynamic of spatial position and time
Number situation of change, the cooling pool temperature in pipe side, pressure, enthalpy, flow etc. change feelings with the dynamic parameter of spatial position and time
Condition, hot trap area liquid level, temperature, pressure, enthalpy, flow are with spatial position and the dynamic parameter situation of change of time.
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