CN106500370B - A kind of the water supply amount control method and its system of photo-thermal power station heat collector - Google Patents
A kind of the water supply amount control method and its system of photo-thermal power station heat collector Download PDFInfo
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- CN106500370B CN106500370B CN201510569875.8A CN201510569875A CN106500370B CN 106500370 B CN106500370 B CN 106500370B CN 201510569875 A CN201510569875 A CN 201510569875A CN 106500370 B CN106500370 B CN 106500370B
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Abstract
The water supply amount control method and its system of a kind of photo-thermal power station heat collector provided by the invention, by measuring sun normal direction direct solar radiation value, calculate the available thermal power of moment heat collector evaporator section absorption, and feed temperature, feed pressure and the steam pressure in heat collector evaporator section exit by measuring the moment heat collector evaporator section inlet, calculate the theoretical confluent of the moment heat collector evaporator section, and then the practical confluent by measuring the moment heat collector evaporator section, adjust the confluent of heat collector evaporator section.So as in time, effectively adjust the confluent of heat collector evaporator section, the steam quality of readily available required parameter according to the variation of intensity of solar radiation.
Description
Technical field
The present invention relates to a kind of heat collector control field more particularly to a kind of confluent controlling parties of photo-thermal power station heat collector
Method and its system.
Background technique
Solar-thermal generating system includes heat collector and the reflecting mirror for sunlight reflection to be gathered on heat collector.Wherein,
Heat collector includes evaporator section and superheat section, and the water for being delivered to heat collector evaporator section absorbs heat in evaporator section, and temperature, which increases, to be produced
Raw high-temperature steam, and the overheat that superheat section implements high-temperature steam is continued through, thus the superheated steam of steam quality needed for obtaining,
And then driven generator group power generation.
Currently, the heat collector with water directly as heat transferring medium mostly uses recirculation mode, the mode height is controllable, can
Guarantee the parameter of end outlet superheated steam.Due to different weather, under different moments, intensity of solar radiation is different, and sun spoke
Therefore penetrating the quality that intensity directly influences the superheated steam of heat collector output for the steam quality for guaranteeing superheat section outlet, needs
Adjust the confluent of evaporator section.Currently, multi-pass crosses the temperature of measurement evaporator section outlet, according to the temperature of evaporator section outlet and preset
Temperature be compared, to adjust the confluent of evaporator section.
Since thermal-collecting tube evaporation segment pipe is longer, resulting in water supply adjusting has very big hysteresis quality, and needs operator
The parameter of member's judgement is more, and overall effect is unsatisfactory, can not adjust in time evaporator section according to the variation of intensity of solar radiation
Confluent, so that it is difficult to ensure that heat collector exports the superheated steam of required quality.
Summary of the invention
The purpose of the present invention is to provide a kind of water supply amount control methods of photo-thermal power station heat collector, can be according to solar radiation
The variation of intensity in time, effectively adjusts the confluent of heat collector evaporator section.
The object of the invention is also to provide a kind of water supply amount control systems of photo-thermal power station heat collector, can be according to sun spoke
The variation for penetrating intensity in time, effectively adjusts the confluent of heat collector evaporator section.
The water supply amount control method of photo-thermal power station heat collector provided by the invention, comprising:
Sun normal direction direct solar radiation value is measured, and the moment heat collector is calculated according to the sun normal direction direct solar radiation value and is steamed
Send out the available thermal power that section absorbs；
The feed temperature and feed pressure of heat collector evaporator section inlet described in the moment are measured, and is calculated current
Enthalpy of Feed Water；
The steam pressure in heat collector evaporator section exit described in the moment is measured, and obtains the dry saturation under the steam pressure
Vapor (steam) temperature value；
The theoretical enthalpy of dry saturated steam is calculated by the steam pressure and the dry saturated steam temperature value；
Have using what the Enthalpy of Feed Water, the theoretical enthalpy of the dry saturated steam and the heat collector evaporator section absorbed
Effect thermal power calculates the theoretical confluent of heat collector evaporator section described in the moment；
The practical confluent of heat collector evaporator section described in the moment is measured, and adjusts the water supply of the heat collector evaporator section
Amount.
Further, the heat collector evaporator section for calculating the moment according to the sun normal direction direct solar radiation value absorbs
Available thermal power, specifically:
According to the sun normal direction direct solar radiation value at the moment, the theoretical thermal power that the heat collector evaporator section absorbs is calculated；
It calculates available heat power efficiency after reflecting mirror and calculates effectively absorbing for the heat collector evaporator section
Heat power efficiency；
Theoretical thermal power, the available hot merit after reflecting mirror absorbed using the heat collector evaporator section is imitated
Effective absorption heat power efficiency of rate and the heat collector evaporator section calculates the effective of the absorption of heat collector evaporator section described in the moment
Thermal power.
Further, available heat power efficiency of the calculating after reflecting mirror includes:
Calculate the effective heat power efficiency of reflection and meter of incidence effectively heat power efficiency, the calculating reflecting mirror of the reflecting mirror
Calculate the loss efficiency of hot merit caused by the reflecting mirror is blocked.
Further, the loss of hot merit caused by the calculating reflecting mirror is blocked efficiency includes: to calculate the reflecting mirror quilt
The loss of hot merit caused by mounting structure blocks efficiency calculates hot merit loss caused by the reflecting mirror is blocked by heat collector evaporator section
Hot merit loss efficiency caused by efficiency and calculating mutually is blocked between the adjacent reflecting mirror.
Further, the effective absorption heat power efficiency for calculating heat collector evaporator section includes: and calculates the heat collector to steam
The blade-end loss efficiency of section is sent out, the absorption efficiency of the heat collector evaporator section is calculated and calculates the outside of the heat collector evaporator section
Radiation and convection losses efficiency.
Further, the effective absorption heat power efficiency for calculating heat collector evaporator section further include: calculate composite parabolic
The secondary reflection efficiency of condenser.
Further, the effective absorption heat power efficiency for calculating heat collector evaporator section further include: calculate the compound throwing
The glass cover-plate efficiency of transmission of object plane condenser.
Further, the effective absorption heat power efficiency for calculating heat collector evaporator section further include: calculate the heat collector
The glass bushing efficiency of transmission of evaporator section.
Further, the effective absorption heat power efficiency for calculating heat collector evaporator section further include: calculate the heat collector
The glass bushing efficiency of transmission of evaporator section.
Further, the Enthalpy of Feed Water, the theoretical enthalpy and the thermal-arrest of the dry saturated steam are utilized described
After the available thermal power that device evaporator section absorbs calculates the theoretical confluent of heat collector evaporator section described in the moment, further includes:
Dynamic compensation adjustment is carried out to the theoretical confluent of the heat collector evaporator section.
Further, the theoretical confluent to the heat collector evaporator section carries out dynamic compensation adjustment, specifically:
The steam pressure in the exit of heat collector evaporator section described in real-time measurement, and obtain corresponding with steam pressure dry
Saturated-steam temperature value；
The vapor (steam) temperature measured value in the exit of heat collector evaporator section described in real-time measurement；
Dynamic practical super heat value is obtained using obtained dry saturated steam temperature value and vapor (steam) temperature measured value；
In the range of predesigned compensation confluent, dynamic compensation is carried out to the theoretical confluent of the heat collector evaporator section and is adjusted
Section, until the practical super heat value tends to be equal with default super heat value.
Further, the range of the predesigned compensation confluent is ± α, and the value of the α is the heat collector evaporator section
The 5%~15% of maximum water supply magnitude.
Further, the default super heat value is 7~12 DEG C.
Further, the water supply amount control system of a kind of photo-thermal power station heat collector provided by the invention, comprising:
The feed pressure measuring device and feed temperature measuring device of the inlet of heat collector evaporator section are set；
The steam pressure measuring device in the exit of the heat collector evaporator section is set；
Volume control device and flow monitoring device between water tank and the heat collector evaporator section on pipeline are set；
And first data processing module and the first proportional-integral derivative controller；
Wherein, the feed pressure measuring device, the feed temperature measuring device and the steam pressure measuring device
It is connected with first data processing module；The output end and the flow monitoring device of first data processing module with
The input terminal of first proportional-integral derivative controller is connected；The output end of first proportional-integral derivative controller
It is connected with the volume control device.
It further, further include the vapor (steam) temperature measuring device that the exit of the heat collector evaporator section is set, second
Data processing module and the second proportional-integral derivative controller；
Wherein, the steam pressure measuring device and the vapor (steam) temperature measuring device with the second data processing mould
Block is connected；The input terminal phase of the output end of second data processing module and second proportional-integral derivative controller
Even；The input terminal of the output end of second proportional-integral derivative controller and first proportional-integral derivative controller
It is connected.
Compared with prior art, the water supply amount control method of photo-thermal power station heat collector provided by the invention, according to sun method
To direct solar radiation value, the solar irradiation intensity of heat collector evaporator section local environment is judged, and can be according to different moments solar radiation
The difference of intensity in time, effectively adjusts the confluent of heat collector evaporator section, to promote the outlet vapor of heat collector evaporator section
Stability, and then guarantee heat collector superheat section outlet vapor quality.
In further technical solution, by introduce influence heat collector evaporator section absorb available thermal power it is multiple because
Element has further clarified reliability, the timeliness of the water supply amount control method of the photo-thermal power station heat collector, has passed through multiple influence
The comprehensive judgement of factor can relatively accurately judge the confluent of the photo-thermal power station heat collector with the change of sun normal direction direct solar radiation value
Change, so in time, effectively under the clear different moments difference sun normal direction direct solar radiation value photo-thermal power station heat collector water supply
Amount.
In further technical solution, dynamic compensation adjustment is carried out by the theoretical confluent to heat collector evaporator section,
It is adjusted to the practical super heat value that heat collector evaporator section exports and tends to be equal with default super heat value, further improve this
The accuracy of the water supply amount control method of photo-thermal power station heat collector, the steam quality of readily available required parameter.
Compared with prior art, the water supply amount control system of photo-thermal power station heat collector provided by the invention, utilizes the water supply
Amount control system can adjust the confluent of heat collector evaporator section, the steam quality of readily available required parameter accurately and in time.
Detailed description of the invention
Hereinafter by based on only non-limiting embodiment and with reference to attached drawing come to the present invention retouched in more detail
It states.Wherein:
Fig. 1 is the flow chart of the water supply amount control method for the photo-thermal power station heat collector that the embodiment of the present invention one provides.
Fig. 2,3,4 are the flow chart of the water supply amount control method of photo-thermal power station heat collector provided by Embodiment 2 of the present invention.
Fig. 5 is the flow chart of the water supply amount control method for the photo-thermal power station heat collector that the embodiment of the present invention three provides.
Fig. 6,7,8 are the structural representation of the water supply amount control system for the photo-thermal power station heat collector that the embodiment of the present invention four provides
Figure.
Detailed description of the invention:
1- heat collector evaporator section, 2- feed pressure measuring device, 3- feed temperature measuring device, 4- steam pressure measurement dress
It sets, 5- water tank, 6- flow monitoring device, 7- volume control device, 8- vapor (steam) temperature measuring device
Specific embodiment
Technical scheme in the embodiment of the invention is clearly and completely described with reference to the accompanying drawings and examples, shows
So, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on the reality in the present invention
Apply example, those of ordinary skill in the art's every other embodiment obtained without creative labor, all
Belong to the scope of protection of the invention.
Embodiment one
As shown in Figure 1, the water supply amount control method of photo-thermal power station heat collector provided in this embodiment, specifically includes following step
It is rapid:
S1: measurement sun normal direction direct solar radiation value, and the moment thermal-arrest is calculated according to the sun normal direction direct solar radiation value
The available thermal power that device evaporator section absorbs；
S2: the feed temperature and feed pressure of the moment heat collector evaporator section inlet are measured, and is calculated current
Enthalpy of Feed Water；
S3: measuring the steam pressure in heat collector evaporator section exit described in the moment, and obtains dry under the steam pressure
Saturated-steam temperature value；
S4: the theoretical enthalpy of dry saturated steam is calculated by the steam pressure and the dry saturated steam temperature value；
S5: have using what the Enthalpy of Feed Water, the theoretical enthalpy of the dry saturated steam and heat collector evaporator section absorbed
Effect thermal power calculates the theoretical confluent of the moment heat collector evaporator section；
S6: measuring the practical confluent of heat collector evaporator section described in the moment, and adjust the heat collector evaporator section to
Water.
In the operational process of photo-thermal power station heat collector, due to different weather, under different moments, intensity of solar radiation is not
Together, and intensity of solar radiation directly influence heat collector output superheated steam quality.Pass through measurement evaporation in the prior art
The temperature of section outlet, is compared according to the temperature that evaporator section exports with preset temperature, so that the confluent of evaporator section is adjusted,
Since thermal-collecting tube evaporation segment pipe is longer, this kind of regulative mode has very big hysteresis quality, can not be according to intensity of solar radiation
Variation is direct, rapidly adjusts the confluent of evaporator section, it is difficult to ensure that heat collector exports the superheated steam of required quality.The present invention
It is determined by the solar irradiation intensity of real-time monitoring photo-thermal power station heat collector local environment according to the variation of intensity of solar radiation
The available thermal power that heat collector evaporator section absorbs, so as to directly and efficiently adjust the confluent of heat collector evaporator section, Jin Erbao
Demonstrate,prove the quality of heat collector superheat section outlet vapor.
Embodiment two
For convenient for readily understanding how the heat collector evaporator section for calculating the moment according to sun normal direction direct solar radiation value
The detailed process for the available thermal power that the heat collector evaporator section absorbs is set forth as follows by the available thermal power of absorption:
As shown in Fig. 2, step S1: being inhaled according to the heat collector evaporator section that the sun normal direction direct solar radiation value calculates the moment
The available thermal power of receipts, specially following steps:
S11: according to the sun normal direction direct solar radiation value at the moment, the theoretical hot merit that the heat collector evaporator section absorbs is calculated
Rate；
S12: calculating the available heat power efficiency after reflecting mirror and calculates effective suction of the heat collector evaporator section
The heat power efficiency of receipts；
S13: theoretical thermal power, the available heat after reflecting mirror absorbed using the heat collector evaporator section
Effective absorption heat power efficiency of effect rate and the heat collector evaporator section calculates the absorption of heat collector evaporator section described in the moment
Available thermal power.
Wherein, the theoretical thermal power that the heat collector evaporator section in S11 step absorbs refers to straight in current sun normal direction
It penetrates under radiation value, the solar irradiation for all reflexing to heat collector evaporator section without any loss and all being absorbed by it
Thermal power.
But in a practical situation, sunlight loses irradiation energy in transmission process because being influenced by various factors,
Two aspects can be substantially divided into.
One is to calculate the available heat power efficiency after reflecting mirror.Available hot merit effect after reflecting mirror
Rate refers under current sun normal direction direct solar radiation value, and sunlight is from being incident on reflecting mirror and reflect sunlight by reflecting mirror
To heat collector evaporator section this during, heat power efficiency that sunlight can actually utilize after losing.It is specific influence because
The mounting structure and its self performance of element and reflecting mirror have great relationship.
As shown in figure 3, calculating the available heat power efficiency after reflecting mirror in the present embodiment and specifically including:
S121: incidence effectively heat power efficiency, the effective heat power efficiency of reflection of calculating reflecting mirror and the calculating of reflecting mirror are calculated
Hot merit caused by reflecting mirror is blocked loses efficiency.
Hot merit loss efficiency caused by reflecting mirror is blocked wherein is calculated to specifically include:
S1211: hot merit loss efficiency, calculating reflecting mirror caused by the mounted structure of reflecting mirror is blocked are calculated and is steamed by heat collector
Hot merit loss efficiency caused by mutually being blocked between the adjacent reflecting mirror of hot merit loss efficiency and calculating caused by hair section is blocked.
It should be noted that the incidence for calculating reflecting mirror has when calculating the available heat power efficiency after reflecting mirror
Influence factor in need of consideration specifically includes that the influence of the installation accuracy of reflecting mirror when imitating heat power efficiency；Mirror tilt angle
Influence etc..Influence factor in need of consideration specifically includes that reflecting mirror itself when calculating the effective hot working efficiency of reflection of reflecting mirror
The influence etc. of reflection efficiency.
In conclusion the factor considered during calculating the available heat power efficiency after reflecting mirror should include
But be not limited to above-mentioned several aspects, those skilled in the art considered according to the difference of mounting structure and mirror performance other
The factor that can influence the available heat power efficiency after reflecting mirror, should all fall into protection scope of the present invention.
Secondly to calculate the heat power efficiency of heat collector evaporator section effectively absorbed.Calculate effective absorption of heat collector evaporator section
Heat power efficiency refer to that the solar irradiation after reflecting mirror reflects is incident upon heat collector after, heat collector can convert sunlight to
The heat power efficiency value of thermal energy that can actually absorb and utilize.The structure of specific influence factor and heat collector evaporator section and its from
Body performance has great relationship.
As shown in figure 4, in the present embodiment, the effective absorption heat power efficiency for calculating heat collector evaporator section specifically includes:
S122: the blade-end loss efficiency for calculating heat collector evaporator section, calculates collection at the absorption efficiency for calculating heat collector evaporator section
The external radiation and convection losses efficiency of hot device evaporator section.
Further, when calculating the heat power efficiency of heat collector evaporator section effectively absorbed, because of different types of photo-thermal electricity
The structure of heat collector evaporator section is different in standing, and the heat power efficiency of the heat collector evaporator section effectively absorbed will receive different factors
It influences, the different structure of heat collector evaporator section is illustrated below by way of example way, and to the effective of calculating heat collector evaporator section
The specific calculating process of the heat power efficiency of absorption is explained.
The first structure of heat collector evaporator section: the heat collector evaporator section includes thermal-collecting tube, compound parabolic concentrator.It should
Compound parabolic concentrator receives the light of reflecting mirror reflection, and the light is reflexed on thermal-collecting tube.It is evaporated for heat collector
The first structure of section, when calculating effective absorption heat power efficiency of the heat collector evaporator section, except including calculating heat collector evaporation
The blade-end loss efficiency of section；Calculate the absorption efficiency of heat collector evaporator section；Calculate the external radiation of heat collector evaporator section and right
Other than stream loss efficiency；It should also include the secondary reflection efficiency for calculating compound parabolic concentrator.
Second of structure of heat collector evaporator section: the heat collector evaporator section include thermal-collecting tube, compound parabolic concentrator and
The glass cover-plate of compound parabolic concentrator.The compound parabolic concentrator receives the light of reflecting mirror reflection, and by the light
It reflexes on thermal-collecting tube, and by the glass cover-plate of setting compound parabolic concentrator, reduces the thermal convection of thermal-collecting tube and environment.
For second of structure of heat collector evaporator section, when calculating effective absorption heat power efficiency of the heat collector evaporator section, except including
Calculate the blade-end loss efficiency of heat collector evaporator section；Calculate the absorption efficiency of heat collector evaporator section；Calculate heat collector evaporator section
Other than external radiation and convection losses efficiency；Should also include calculate compound parabolic concentrator secondary reflection efficiency and
Calculate the glass cover-plate efficiency of transmission of compound parabolic concentrator.
The third structure of heat collector evaporator section: the heat collector evaporator section includes thermal-collecting tube, is socketed on outside thermal-collecting tube
Glass bushing and compound parabolic concentrator.Space between the glass bushing and thermal-collecting tube vacuumizes, to reduce thermal-collecting tube
Heat waste.For the third structure of heat collector evaporator section, effective absorption heat power efficiency of the heat collector evaporator section is being calculated
When calculating, except the blade-end loss efficiency for including calculating heat collector evaporator section；Calculate the absorption efficiency of heat collector evaporator section；Calculate collection
Other than the external radiation and convection losses efficiency of hot device evaporator section；It should also include the secondary counter for calculating compound parabolic concentrator
It penetrates efficiency and calculates the glass bushing efficiency of transmission of heat collector evaporator section.
4th kind of structure of heat collector evaporator section: the heat collector evaporator section includes thermal-collecting tube, is socketed on outside thermal-collecting tube
Glass bushing.Space between the glass bushing and thermal-collecting tube vacuumizes, to reduce the heat waste of thermal-collecting tube.It is steamed for heat collector
The 4th kind of structure for sending out section, when calculating effective absorption heat power efficiency of its heat collector evaporator section, removing includes calculating heat collector to steam
The blade-end loss efficiency of section is sent out, the absorption efficiency of heat collector evaporator section is calculated, calculates the external radiation of heat collector evaporator section and right
Other than stream loss efficiency；It should also include the glass bushing efficiency of transmission for calculating heat collector evaporator section.
In conclusion it should be further noted that calculating the heat power efficiency of heat collector evaporator section effectively absorbed
When process, the factor of consideration should include following several respects: because of the influence of heat collector evaporator section blade-end loss；Because heat collector evaporates
The influence of the absorbent properties of section；And because of the external radiation of heat collector evaporator section and the influence of convection losses.Calculating heat collector
The factor considered during the heat power efficiency of evaporator section effectively absorbed should include but is not limited to above-mentioned several aspects, this field
Technical staff considered according to the structure of heat collector evaporator section and its difference of self performance other can influence heat collector steaming
The factor for sending out the heat power efficiency of section effectively absorbed, should all fall into protection scope of the present invention.
Embodiment three
Above-described embodiment one and embodiment two elaborate the water supply amount control method of photo-thermal power station heat collector, elaborate thermal-arrest
The control mode of device evaporator section confluent introduces in above-mentioned control method for the accuracy for further increasing the control method
Auxiliary adjusting method.It is absorbed in the theoretical enthalpy and heat collector evaporator section for utilizing Enthalpy of Feed Water, dry saturated steam effective
After thermal power calculates the theoretical confluent of the moment heat collector evaporator section, further includes:
Dynamic compensation adjustment is carried out to the theoretical confluent of heat collector evaporator section.
Utilize the water supply amount control method and collection provided in this embodiment of the heat collector that embodiment one or embodiment two provide
The common adjusting of the auxiliary adjusting method of the confluent of hot device improves the accurate of the water supply amount control method of photo-thermal power station heat collector
Property, convenient for efficiently obtaining the steam quality of required parameter.
As shown in figure 5, being directed to specifically including for the water supply amount control method of heat collector provided in this embodiment:
S1: measurement sun normal direction direct solar radiation value, and the moment thermal-arrest is calculated according to the sun normal direction direct solar radiation value
The available thermal power that device evaporator section absorbs；
S2: the feed temperature and feed pressure of the moment heat collector evaporator section inlet are measured, and is calculated current
Enthalpy of Feed Water；
S3: measuring the steam pressure in heat collector evaporator section exit described in the moment, and obtains dry under the steam pressure
Saturated-steam temperature value；
S4: the theoretical enthalpy of dry saturated steam is calculated by the steam pressure and the dry saturated steam temperature value；
S5: it is absorbed using the Enthalpy of Feed Water, the theoretical enthalpy of the dry saturated steam and the heat collector evaporator section
Available thermal power calculate the theoretical confluent of heat collector evaporator section described in the moment；
After step s 5, further includes:
T: dynamic compensation adjustment is carried out to the theoretical confluent of the heat collector evaporator section.
Wherein, step T: dynamic compensation adjustment is carried out to the theoretical confluent of heat collector evaporator section, concretely: surveying in real time
The steam pressure in the exit of heat collector evaporator section is measured, and obtains dry saturated steam temperature value corresponding with steam pressure；
The vapor (steam) temperature measured value in the exit of real-time measurement heat collector evaporator section；
Dynamic practical super heat value is obtained using obtained dry saturated steam temperature value and vapor (steam) temperature measured value；
In the range of predesigned compensation confluent, dynamic compensation adjustment is carried out to the theoretical confluent of heat collector evaporator section,
Until practical super heat value tends to be equal with default super heat value.
It should be noted that about influence in the control method of the confluent of the photo-thermal power station heat collector evaporator section of the present embodiment
Heat collector absorb available thermal power factor and its calculating process with embodiment one or two disclosure of embodiment substantially
Identical, details are not described herein, and the dynamic compensation adjustment below for the theoretical confluent to heat collector evaporator section is given specifically
It is bright.
To carry out this mistake of dynamic compensation adjustment to the theoretical confluent of heat collector evaporator section convenient for being more clearly understood
Its specific adjustment process is set forth as follows by journey:
Firstly, according to the specific structure of the photo-thermal power station heat collector evaporator section, the priori knowledge of combination technology personnel, for this
The steam superheat in heat collector evaporator section exit determines a default super heat value.Real-time measurement heat collector evaporator section exit
Steam pressure, and obtain dry saturated steam temperature value corresponding with steam pressure；Real-time measurement heat collector evaporator section goes out
Vapor (steam) temperature measured value at mouthful；Practical super heat value is obtained according to dry saturated steam temperature value and vapor (steam) temperature measured value.
Secondly, the practical super heat value is compared with default super heat value, if practical super heat value and default overheat
Angle value is not identical, then need to compensate tune to the theoretical confluent of heat collector evaporator section in the range of predesigned compensation confluent
Section.Determine a compensation adjustment amount, by the compensation adjustment amount and theoretical confluent and value as theoretical confluent finally,
And the practical confluent of heat collector evaporator section at this time is measured, according to final theoretical confluent and practical confluent, adjust water supply
The water supply frequency of pump, to adjust the confluent of heat collector evaporator section.It is carried out in the theoretical confluent to the heat collector evaporator section
During dynamic compensation adjustment, according to the difference of practical super heat value and default super heat value, by reducing compensation adjustment amount
Or increase compensation adjustment amount, to reduce final theoretical confluent or increase final theoretical confluent, until practical overheat
Angle value tends to be equal with default super heat value.
Wherein, the range of predesigned compensation confluent is ± α, and the value of the α is the maximum water supply magnitude of heat collector evaporator section
5%~15%.Wherein, presetting super heat value is 7~12 DEG C.Wherein, the range of predesigned compensation confluent and default super heat value
For according to the specific structure of photo-thermal power station heat collector, by repetition test, in different types of photo-thermal power station not
The range of the structure of same heat collector, the predesigned compensation confluent and default super heat value is also different.
Example IV
As shown in Fig. 6 to 8, the water supply amount control system of photo-thermal power station heat collector provided in this embodiment, comprising:
The feed pressure measuring device 2 and feed temperature measuring device 3 of the inlet of heat collector evaporator section 1 are set；
The steam pressure measuring device 4 in the exit of heat collector evaporator section 1 is set；
Volume control device 7 and flow monitoring device 6 between water tank 5 and heat collector evaporator section 1 on pipeline are set；
And first data processing module and the first proportional-integral derivative controller；
Wherein, the feed pressure measuring device 2, feed temperature measuring device 3 and steam pressure measuring device 4 and the first number
It is connected according to processing module；The output end and flow monitoring device 6 of first data processing module with the first ratio-product
Point-input terminal of derivative controller is connected；The output end of first proportional-integral derivative controller and 7 phase of volume control device
Even.
By feed pressure measuring device 2 and feed temperature measuring device 3 that the inlet of heat collector evaporator section 1 is arranged in
The feed pressure value and feed temperature value of 1 inlet of heat collector evaporator section are obtained, and by the way that going out for heat collector evaporator section 1 is arranged in
Steam pressure measuring device 4 at mouthful obtains the vapour pressure force value in 1 exit of heat collector evaporator section.The heat collector of acquisition is evaporated
The vapour pressure force value in 1 exit of feed pressure value and feed temperature value and heat collector evaporator section of 1 inlet of section is in the first data
Calculation process is carried out in processing module, calculates the theoretical confluent of heat collector evaporator section 1, and obtain by flow monitoring device 6
The practical confluent for obtaining heat collector evaporator section 1, the theory for handling the heat collector evaporator section 1 obtained through the first data processing module are given
Water and the practical confluent of the heat collector evaporator section 1 obtained by flow monitoring device 6 pass through the first proportional-integral-differential
The processing of controller adjusts volume control device 7, implements the adjusting of 1 confluent of heat collector evaporator section.
In addition, the water supply amount control system of the photo-thermal power station heat collector, may also include and going out for heat collector evaporator section 1 is arranged in
Vapor (steam) temperature measuring device 8, the second data processing module and the second proportional-integral derivative controller at mouthful；
Wherein, steam pressure measuring device 4 and vapor (steam) temperature measuring device 8 are connected with the second data processing module；The
The output end of two data processing modules is connected with the input terminal of the second proportional-integral derivative controller；Second proportional, integral-micro-
The output end of sub-controller is connected with the input terminal of the first proportional-integral derivative controller.
Vapor (steam) temperature measuring device 8 by the way that the exit of heat collector evaporator section 1 is arranged in obtains heat collector evaporator section 1
The vapor (steam) temperature measured value in exit steams the vapor (steam) temperature measured value in 1 exit of heat collector evaporator section of acquisition and heat collector
The vapour pressure force value in hair 1 exit of section carries out calculation process in the second data processing module, obtains practical super heat value；Pre-
If the compensation rate of the theoretical confluent for heat collector evaporator section 1 is determined in flow-compensated range, in conjunction with heat collector evaporator section 1
Theoretical confluent adjusts flow control by the first proportional-integral derivative controller and the second proportional-integral derivative controller
Device 7 implements the adjusting of 1 confluent of heat collector evaporator section.
The water supply amount control system of the photo-thermal power station heat collector provided through this embodiment utilizes the water supply amount control system
The confluent of heat collector evaporator section 1 can be adjusted, accurately and in time so as to expeditiously obtain the steam quality of required parameter.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；To the greatest extent
Invention is explained in detail referring to aforementioned embodiments for pipe, those skilled in the art should understand that: its according to
The technical solution that can so record to aforementioned embodiments is modified, or is equally replaced to part of technical characteristic
It changes；And these are modified or replaceed, the essence for embodiment of the present invention technical solution that it does not separate the essence of the corresponding technical solution
Mind and range.
Claims (12)
1. a kind of water supply amount control method of photo-thermal power station heat collector, which is characterized in that
Sun normal direction direct solar radiation value is measured, and the moment heat collector evaporator section is calculated according to the sun normal direction direct solar radiation value
The available thermal power of absorption, specifically: according to the sun normal direction direct solar radiation value at the moment, calculates the heat collector evaporator section and inhale
The theoretical thermal power of receipts；
It calculates the available heat power efficiency after reflecting mirror and calculates the hot merit of the heat collector evaporator section effectively absorbed
Efficiency；
The theoretical thermal power that is absorbed using the heat collector evaporator section, the available heat power efficiency after reflecting mirror and
Effective absorption heat power efficiency of the heat collector evaporator section calculates effective hot merit of the absorption of heat collector evaporator section described in the moment
Rate；
The feed temperature and feed pressure of heat collector evaporator section inlet described in the moment are measured, and calculates current water supply
Enthalpy；
The steam pressure in heat collector evaporator section exit described in the moment is measured, and obtains the dry saturated steam under the steam pressure
Temperature value；
The theoretical enthalpy of dry saturated steam is calculated by the steam pressure and the dry saturated steam temperature value；
The effective heat absorbed using the Enthalpy of Feed Water, the theoretical enthalpy of the dry saturated steam and the heat collector evaporator section
Power meter calculates the theoretical confluent of heat collector evaporator section described in the moment；
The practical confluent of heat collector evaporator section described in the moment is measured, and adjusts the confluent of the heat collector evaporator section.
2. the water supply amount control method of photo-thermal power station heat collector according to claim 1, which is characterized in that the calculating warp
Available heat power efficiency after crossing reflecting mirror includes:
Calculate incidence effectively heat power efficiency, the effective heat power efficiency of reflection of the calculating reflecting mirror and the calculating institute of the reflecting mirror
State the loss efficiency of hot merit caused by reflecting mirror is blocked.
3. the water supply amount control method of photo-thermal power station heat collector according to claim 2, which is characterized in that described to calculate instead
Penetrating the loss of hot merit caused by mirror is blocked efficiency includes: to calculate the reflecting mirror to be mounted hot merit loss effect caused by structure is blocked
Rate, calculate hot merit loss efficiency caused by the reflecting mirror is blocked by heat collector evaporator section and calculate the adjacent reflecting mirror it
Between mutually block caused by hot merit loss efficiency.
4. the water supply amount control method of photo-thermal power station heat collector according to any one of claims 1 to 3, which is characterized in that
The effective absorption heat power efficiency for calculating heat collector evaporator section includes: the blade-end loss effect for calculating the heat collector evaporator section
Rate, the absorption efficiency for calculating the heat collector evaporator section and the external radiation for calculating the heat collector evaporator section and convection losses effect
Rate.
5. the water supply amount control method of photo-thermal power station heat collector according to claim 4, which is characterized in that the calculating collection
Effective absorption heat power efficiency of hot device evaporator section further include: calculate the secondary reflection efficiency of compound parabolic concentrator.
6. the water supply amount control method of photo-thermal power station heat collector according to claim 5, which is characterized in that the calculating collection
Effective absorption heat power efficiency of hot device evaporator section further include: calculate the glass cover-plate transmission effect of the compound parabolic concentrator
Rate.
7. the water supply amount control method of photo-thermal power station heat collector according to claim 5, which is characterized in that the calculating collection
Effective absorption heat power efficiency of hot device evaporator section further include: calculate the glass bushing efficiency of transmission of the heat collector evaporator section.
8. the water supply amount control method of photo-thermal power station heat collector according to claim 4, which is characterized in that the calculating collection
Effective absorption heat power efficiency of hot device evaporator section further include: calculate the glass bushing efficiency of transmission of the heat collector evaporator section.
9. the water supply amount control method of photo-thermal power station heat collector according to any one of claims 1 to 3, which is characterized in that
The effective of the Enthalpy of Feed Water, the theoretical enthalpy of the dry saturated steam and the heat collector evaporator section absorption is utilized described
After thermal power calculates the theoretical confluent of heat collector evaporator section described in the moment, further includes:
Dynamic compensation adjustment is carried out to the theoretical confluent of the heat collector evaporator section.
10. the water supply amount control method of photo-thermal power station heat collector according to claim 9, which is characterized in that described to institute
The theoretical confluent for stating heat collector evaporator section carries out dynamic compensation adjustment, specifically:
The steam pressure in the exit of heat collector evaporator section described in real-time measurement, and obtain dry saturation corresponding with steam pressure
Vapor (steam) temperature value；
The vapor (steam) temperature measured value in the exit of heat collector evaporator section described in real-time measurement；
Dynamic practical super heat value is obtained using obtained dry saturated steam temperature value and vapor (steam) temperature measured value；
In the range of predesigned compensation confluent, dynamic compensation adjustment is carried out to the theoretical confluent of the heat collector evaporator section,
Until the practical super heat value tends to be equal with default super heat value.
11. the water supply amount control method of photo-thermal power station heat collector according to claim 10, which is characterized in that described default
The range of make-up water amount is ± α, and the value of the α is the 5%~15% of the maximum water supply magnitude of the heat collector evaporator section.
12. the water supply amount control method of photo-thermal power station heat collector according to claim 10, which is characterized in that described default
Super heat value is 7~12 DEG C.
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