CN105184087B - The computational methods and device that variation of ambient temperature influences Thermal generation unit coal consumption - Google Patents
The computational methods and device that variation of ambient temperature influences Thermal generation unit coal consumption Download PDFInfo
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- 239000003245 coal Substances 0.000 title claims abstract description 67
- 238000000205 computational method Methods 0.000 title claims abstract description 15
- 239000007789 gas Substances 0.000 claims abstract description 87
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000003546 flue gas Substances 0.000 claims abstract description 29
- 208000011580 syndromic disease Diseases 0.000 claims abstract description 16
- 238000012937 correction Methods 0.000 claims abstract description 7
- 238000013461 design Methods 0.000 claims description 54
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 22
- 238000001816 cooling Methods 0.000 claims description 16
- 238000004364 calculation method Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 8
- 230000007613 environmental effect Effects 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 10
- 238000004590 computer program Methods 0.000 description 7
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- 238000010977 unit operation Methods 0.000 description 3
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- 238000007726 management method Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
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Abstract
The computational methods and device influenced the present invention provides a kind of variation of ambient temperature on Thermal generation unit coal consumption, including：Under set environment temperature T, air preheater entrance wind-warm syndrome and air preheater entrance flue gas temperature are obtained, and exhaust gas temperature is calculated according to the air preheater entrance wind-warm syndrome and air preheater entrance flue gas temperatureAccording to the exhaust gas temperatureCalculate the variation delta q of boiler exhaust gas heat loss2；Influence based on environment temperature to back pressure obtains back pressure；LP Turbine Exhaust Pressure Correction Curves are searched according to the back pressure, obtain the actual heat consumption H under the back pressureRWith designing heat consumption HRTHADifference DELTA HR；According to the variation delta q of boiler exhaust gas heat loss2And the difference DELTA HRInfluence total amount Δ b of the computing environment temperature to unit coal consumption.The present invention can quantify the influence for calculating variation of ambient temperature to Thermal generation unit coal consumption, accurate to calculate external condition deviation, and then finally attainable efficiency is horizontal for research generating set.
Description
Technical field
The present invention relates to Thermal generation unit coal consumption analytical technology more particularly to a kind of variation of ambient temperature to coal fired power generation
The computational methods and device that unit coal consumption influences.
Background technology
As society is higher and higher to the demand of electric power, how to improve the generating efficiency of generating set becomes current people
The problem of concern.
For a definite generating set, the horizontal factor for depending on three aspects of final attainable efficiency,
I.e.：The design and manufacture level of this generating set；The application conditions of this generator unit；Manager is to the pipe of generating set
Manage application level.Manager can manage the subjective factor that the management application level of generating set is unit operation by running
The improvement of reason is improved.The design and manufacture level of generating set and the application conditions of generator unit are unit operations
Objective factor.
Factor in terms of based on above three, define in the prior art as follows with the relevant value of economy：
(a) desired value or optimal value：Based on the peak performance value that identical steam design parameter designs can be ideal value or
Optimal value, it is optimal that optimal value represents same type units design, and management level height its performance is performed to it is best；
(b) design load：The efficiency of certain unit design to be evaluated is horizontal；
(c) actual value：The efficiency that certain unit to be evaluated actually reaches is horizontal；
(d) value should be reached：Refer to unit in actual operation, in a certain objective condition (such as temperature, circulating water temperature not able person
For under the objective condition of change) under and a certain operating mode (such as rate of load condensate), a certain heat supply power generation ratio under the conditions of in Optimum operating control
The optimum value that should theoretically reach is run under mode.
Value should be reached on the basis of Energy design value, by the influence of remover apparatus aberrations in property and objective condition deviation come really
It is fixed.Equipment performance deviation refers to difference of the unit performance with design load under design condition, the comprehensive design for embodying equipment, system
It makes and installation is horizontal, if facilities and equipments are not transformed, equipment performance deviation cannot be changed.Objective condition deviation refers to unit operation
Deviation caused by residing objective condition and design condition is inconsistent, geographical location, gas residing for so-called objective condition, that is, unit
The service condition not being affected by human factors as condition, network load limitation etc..Design load deducts equipment performance deviation and objective
Efficiency deviation caused by condition deviation is that the unit should reach value, i.e.,：
Value=design load ± equipment performance deviation ± external condition deviation should be reached
External condition deviation effects mainly consider the factor of three aspects：Machine caused by actual common coal quality off-design coal quality
Group efficiency deviation, unit efficiency deviation caused by actual environment temperature departure design environment temperature and the actual output of unit are inclined
From efficiency deviation caused by nominal output, the external condition deviation i.e. adduction of this three parts efficiency deviation.
As it can be seen that unit efficiency deviation is as external condition deviation caused by actual environment temperature departure design environment temperature
One of principal element is affected to generating efficiency, and in order to study generating set, finally attainable efficiency is horizontal, just necessary
In view of unit efficiency deviation caused by actual environment temperature departure design environment temperature.In the prior art, do not occur also
The analytical technology influenced on variation of ambient temperature on Thermal generation unit coal consumption.
The content of the invention
The embodiment of the present invention provides computational methods and the dress that a kind of variation of ambient temperature influences Thermal generation unit coal consumption
It puts, it is accurate to calculate external condition deviation, Jin Eryan with influence of the quantitative calculating variation of ambient temperature to Thermal generation unit coal consumption
Studying carefully generating set, finally attainable efficiency is horizontal.
To achieve these goals, an embodiment of the present invention provides a kind of variation of ambient temperature to Thermal generation unit coal consumption
The computational methods of influence, the computational methods include：
Under set environment temperature T, air preheater entrance wind-warm syndrome and air preheater entrance flue gas temperature, and root are obtained
Exhaust gas temperature is calculated according to the air preheater entrance wind-warm syndrome and air preheater entrance flue gas temperature
According to the exhaust gas temperatureCalculate the variation delta q of boiler exhaust gas heat loss2；
Influence based on environment temperature to back pressure obtains turbine back pressure；
LP Turbine Exhaust Pressure Correction Curves are searched according to the turbine back pressure, obtain the actual heat under the turbine back pressure
Consume HRWith designing heat consumption HRTHADifference DELTA HR；
According to the variation delta q of boiler exhaust gas heat loss2And the difference DELTA HRComputing environment temperature is to the shadow of unit coal consumption
Ring total amount Δ b.
In one embodiment, boiler is calculated according to the air preheater entrance wind-warm syndrome and air preheater entrance flue gas temperature
Exhaust gas temperatureIncluding：
It brings the air preheater entering air temperature and air preheater entrance flue gas temperature into following formula, calculates
The exhaust gas temperature
Wherein, θEnFor air preheater entrance flue gas temperature, θLvFor air preheater exit gas temperature, tEnAir is pre-
Hot device entering air temperature.
In one embodiment, according to the exhaust gas temperatureCalculate the variation delta q of boiler exhaust gas heat loss2, including：
By the exhaust gas temperatureIt brings following formula into, calculates the variation delta q of the boiler exhaust gas heat loss2：
Wherein, q2For the boiler exhaust gas heat loss design load under the set environment temperature T.
In one embodiment, when the steam turbine is air cooling unit, the influence based on environment temperature to back pressure obtains steamer
Machine back pressure, including：According to environment temperature to the influence curve of back pressure, the turbine back pressure under current environmental temperature is obtained.
In one embodiment, when the steam turbine is wet type cooling unit, the influence based on environment temperature to back pressure obtains steamer
Machine back pressure, including：
The condenser outlet temperature difference is calculated according to the design data under load condition；
According to Inlet Temperature of Circulating Water and the differential thermal calculation actual exhaust air temperature；
According to the actual exhaust air temperature lookup water vapor pressure property list, the corresponding vapour of the actual exhaust air temperature is obtained
Turbine back pressure.
In one embodiment, the condenser outlet temperature difference is calculated according to the design data under load condition, including：
Water vapor pressure property list is searched according to setting back pressure value, obtain the exhaust temperature under the setting back pressure value and is coagulated
Vapour device inflow temperature；
The condenser outlet temperature difference is calculated according to the exhaust temperature and condenser inflow temperature.
In one embodiment, according to the variation delta q of boiler exhaust gas heat loss2And the difference DELTA HRComputing environment temperature pair
The influence total amount Δ b of unit coal consumption, including：
By the variation delta q according to boiler exhaust gas heat loss2And the difference DELTA HRIt brings following formula into, calculates ring
Influence total amount Δ b of the border temperature to unit coal consumption：
Wherein, bstFor unit design coal consumption, g/kWh；ηBFor the boiler efficiency at a temperature of design environment, %；HRDFor design
Thermal loss of steam turbine under environment temperature, kJ/kWh.
To achieve these goals, an embodiment of the present invention provides a kind of variation of ambient temperature to Thermal generation unit coal consumption
The computing device of influence, the computing device include：
Exhaust gas temperature computing unit, under set environment temperature T, obtaining air preheater entrance wind-warm syndrome and sky
Air preheater entrance flue gas temperature, and calculated according to the air preheater entrance wind-warm syndrome and air preheater entrance flue gas temperature
Exhaust gas temperature
Variable quantity computing unit, for according to the exhaust gas temperatureCalculate the variation delta of boiler exhaust gas heat loss
q2；
Back pressure generation unit, for obtaining turbine back pressure based on influence of the environment temperature to back pressure；
Heat consumption differential value generation unit for searching LP Turbine Exhaust Pressure Correction Curves according to the turbine back pressure, obtains institute
State the actual heat consumption H under turbine back pressureRWith designing heat consumption HRTHADifference DELTA HR；
Coal consumption influences computing unit, for the variation delta q according to boiler exhaust gas heat loss2And the difference DELTA HRIt calculates
Influence total amount Δ b of the environment temperature to unit coal consumption.
In one embodiment, the exhaust gas temperature computing unit is specifically used for：By the air preheater intake air
Temperature and air preheater entrance flue gas temperature bring following formula into, calculate the exhaust gas temperature
Wherein, θEnFor air preheater entrance flue gas temperature, θLvFor air preheater exit gas temperature, tEnAir is pre-
Hot device entering air temperature.
In one embodiment, the variable quantity computing unit is specifically used for：By the exhaust gas temperatureBring following public affairs into
Formula calculates the variation delta q of the boiler exhaust gas heat loss2：
Wherein, q2For the boiler exhaust gas heat loss design load under the set environment temperature T.
In one embodiment, when the steam turbine is air cooling unit, the back pressure generation unit is used for according to environment temperature
To the influence curve of back pressure, the turbine back pressure under current environmental temperature is obtained.
In one embodiment, when the steam turbine is wet type cooling unit, the back pressure generation unit includes：
Differential thermal calculation module, for calculating the condenser outlet temperature difference according to the design data under load condition；
Delivery temperature calculates module, for according to Inlet Temperature of Circulating Water and the differential thermal calculation actual exhaust air temperature；
Back pressure generation module, for according to the actual exhaust air temperature lookup water vapor pressure property list, obtaining the reality
The corresponding turbine back pressure of border delivery temperature.
In one embodiment, the differential thermal calculation module is specifically used for：Water vapor pressure force characteristic is searched according to setting back pressure value
Table obtains exhaust temperature and condenser inflow temperature under the setting back pressure value；According to the exhaust temperature and condenser into
Coolant-temperature gage calculates the condenser outlet temperature difference.
In one embodiment, the coal consumption influences computing unit and is specifically used for：By the change according to boiler exhaust gas heat loss
Change amount Δ q2And the difference DELTA HRBring following formula, influence total amount Δ b of the computing environment temperature to unit coal consumption into：
Wherein, bstFor unit design coal consumption, g/kWh；ηBFor the boiler efficiency at a temperature of design environment, %；HRDFor design
Thermal loss of steam turbine under environment temperature, kJ/kWh.
The advantageous effect of the embodiment of the present invention is, using the present invention, can quantify and calculate variation of ambient temperature to fire coal
The influence of generating set coal consumption, it is accurate to calculate external condition deviation, and then study generating set finally attainable efficiency level.
Description of the drawings
It in order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention, for those of ordinary skill in the art, without creative efforts, can be with
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the computational methods flow chart that variation of ambient temperature of the embodiment of the present invention influences Thermal generation unit coal consumption；
Fig. 2 is influence curve schematic diagram of the environment temperature of the embodiment of the present invention to back pressure；
Fig. 3 obtains the method flow diagram of turbine back pressure for the embodiment of the present invention based on influence of the environment temperature to back pressure；
Fig. 4 is typical unit back pressuce fair curve schematic diagram；
Fig. 5 is the structural frames for the computing device that variation of ambient temperature of the embodiment of the present invention influences Thermal generation unit coal consumption
Figure；
Fig. 6 is the structure diagram of the back pressure generation unit 503 of the embodiment of the present invention.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work
Embodiment belongs to the scope of protection of the invention.
An embodiment of the present invention provides the computational methods that a kind of variation of ambient temperature influences Thermal generation unit coal consumption, such as
Shown in Fig. 1, which includes the following steps：
S101：Under set environment temperature T, air preheater entrance wind-warm syndrome and air preheater inlet flue gas temperature are obtained
Degree, and exhaust gas temperature is calculated according to the air preheater entrance wind-warm syndrome and air preheater entrance flue gas temperature
S103：According to the exhaust gas temperatureCalculate the variation delta q of boiler exhaust gas heat loss2；
S103：Influence based on environment temperature to back pressure obtains turbine back pressure；
S104：LP Turbine Exhaust Pressure Correction Curves are searched according to the turbine back pressure, are obtained under the turbine back pressure
Actual heat consumption HRWith designing heat consumption HRTHADifference DELTA HR；
S105：According to the variation delta q of boiler exhaust gas heat loss2And the difference DELTA HRComputing environment temperature is to unit coal
The influence total amount Δ b of consumption.
Flow as shown in Figure 1 is understood, needs during variation of ambient temperature to consider variation of ambient temperature to boiler efficiency simultaneously
With the influence of turbine efficiency.The present invention calculates the variable quantity of boiler exhaust gas heat loss and thermal loss of steam turbine difference first, then
According to the influence total amount of the variable quantity of boiler exhaust gas heat loss and thermal loss of steam turbine mathematic interpolation environment temperature to unit coal consumption, lead to
This method is crossed, influence of the computing environment temperature change that can be quantified to Thermal generation unit coal consumption.
Influence of the variation of ambient temperature to boiler efficiency is mainly reflected in its influence to boiler exhaust gas heat loss.It calculates
Influence of the variation of ambient temperature to heat loss due to exhaust gas, it is necessary first to according to air preheater entering air temperature and air preheater
Entrance flue gas temperature carrys out exhaust gas temperature during computing environment temperature TSpecific formula for calculation is as follows：
Bring the parameters such as air preheater entering air temperature and air preheater entrance flue gas temperature into above-mentioned formula
(1), it is possible to calculate exhaust gas temperature
In formula (1), θEnFor air preheater entrance flue gas temperature, θLvFor air preheater exit gas temperature, tEnIt is empty
Air preheater entering air temperature.
During the present invention implements, it is assumed that environment temperature T is 25 DEG C, and formula (1) translates into equation below：
Exhaust gas temperature during using TThe variation delta q of boiler exhaust gas heat loss can be calculated2, specifically,
By exhaust gas temperatureIt brings following formula into, calculates the variation delta q of the boiler exhaust gas heat loss2：
In formula (3), q2For the boiler exhaust gas heat loss design load under set environment temperature T.
Steam turbine is divided into wet type cooling unit and air cooling unit, and in step S103, the influence based on environment temperature to back pressure obtains
The method of turbine back pressure, wet type cooling unit and air cooling unit are different, it is necessary to calculate respectively.
For air cooling unit, step S103 can be directly according to environment temperature to the influence curve of back pressure, and front ring is worked as in acquisition
Turbine back pressure at a temperature of border, environment temperature are as shown in Figure 2 to the influence curve of back pressure.
It, also should be based on environment temperature to the influence curve of back pressure for wet type cooling unit.Curve needs are designed according to producer
Based on parameter, carry out Correlation method for data processing and obtain.As shown in figure 3, step S103 is when it is implemented, include the following steps：
S301：The condenser outlet temperature difference is calculated according to the design data under load condition.
In particular it is required that searching water vapor pressure property list according to setting back pressure value, obtain under the setting back pressure value
Exhaust temperature and condenser inflow temperature；Then the condenser is calculated according to the exhaust temperature and condenser inflow temperature to go out
The mouth temperature difference.
For example, such as certain unit design back pressure is 5.88kPa, inquiry water vapor pressure property list is understood under the back pressure
Exhaust temperature is 31.8 DEG C, and condenser inflow temperature is 24 DEG C under design condition, then the condenser outlet temperature difference is 7.8 DEG C.It should
The temperature difference is to ensure the required temperature difference of heat-transfer temperature difference of condensor, can be changed with the size of circulating water flow, but in condensing
Under conditions of device heating surface is constant, big degree of convergence, which reduces the temperature difference, can pay higher cost, therefore think that condenser exports in calculating
The temperature difference is design load, is remained unchanged.
S302：According to Inlet Temperature of Circulating Water and the differential thermal calculation actual exhaust air temperature.Actual exhaust air temperature is actual
Circulating water temperature exports the sum of temperature difference with condenser.
S303：According to the actual exhaust air temperature lookup water vapor pressure property list, the actual exhaust air temperature pair is obtained
The turbine back pressure answered.
For S104, every unit is required for the back pressure fair curve of oneself, and typical unit back pressuce fair curve is as follows
Shown in Fig. 4.
In S105, it is necessary to according to influence total amount Δ b of following formula computing environment temperature to unit coal consumption.
In particular it is required that the variation delta q by boiler exhaust gas heat loss2And difference DELTA HRBring formula (4), computing environment into
Influence total amount Δ b of the temperature to unit coal consumption.
In formula (4), bstFor unit design coal consumption, g/kWh；ηBFor the boiler efficiency at a temperature of design environment, %；HRDFor
Thermal loss of steam turbine at a temperature of design environment, kJ/kWh.
Using the present invention, the influence for calculating variation of ambient temperature to Thermal generation unit coal consumption can be quantified, it is accurate to calculate
External condition deviation, and then study generating set finally attainable efficiency level.
Based on the identical invention of the computational methods influenced with variation of ambient temperature shown in FIG. 1 on Thermal generation unit coal consumption
Design, the embodiment of the present application additionally provide the computing device that a kind of variation of ambient temperature influences Thermal generation unit coal consumption, such as
Described in example below.The original solved the problems, such as due to the variation of ambient temperature on the computing device that Thermal generation unit coal consumption influences
It is similar to manage the computational methods influenced to variation of ambient temperature on Thermal generation unit coal consumption, therefore the variation of ambient temperature is to fire coal
The implementation for the computing device that generating set coal consumption influences may refer to what variation of ambient temperature influenced Thermal generation unit coal consumption
The implementation of computational methods, overlaps will not be repeated.
As shown in figure 5, a kind of variation of ambient temperature of the embodiment of the present invention fills the calculating that Thermal generation unit coal consumption influences
It puts, the computing device which influences Thermal generation unit coal consumption includes：Exhaust gas temperature computing unit
501, variable quantity computing unit 502, back pressure generation unit 503, heat consumption differential value generation unit 504 and coal consumption influence computing unit
505。
Exhaust gas temperature computing unit 501 be used under set environment temperature T, obtain air preheater entrance wind-warm syndrome and
Air preheater entrance flue gas temperature, and according to the air preheater entrance wind-warm syndrome and air preheater entrance flue gas temperature meter
Calculate exhaust gas temperature
Variable quantity computing unit 502 is used for according to the exhaust gas temperatureCalculate the variable quantity of boiler exhaust gas heat loss
Δq2。
Back pressure generation unit 503 is used to obtain turbine back pressure based on influence of the environment temperature to back pressure.
Heat consumption differential value generation unit 504 is used to search LP Turbine Exhaust Pressure Correction Curves according to the turbine back pressure, obtains
Actual heat consumption H under the turbine back pressureRWith designing heat consumption HRTHADifference DELTA HR。
Coal consumption influences computing unit 505 for the variation delta q according to boiler exhaust gas heat loss2And the difference DELTA HRMeter
Calculate influence total amount Δ b of the environment temperature to unit coal consumption.
In one embodiment, exhaust gas temperature computing unit 501 is specifically used for：By the air preheater intake air temperature
Degree and air preheater entrance flue gas temperature bring following formula into, calculate the exhaust gas temperature
Wherein, θEnFor air preheater entrance flue gas temperature, θLvFor air preheater exit gas temperature, tEnAir is pre-
Hot device entering air temperature.
In one embodiment, variable quantity computing unit 502 is specifically used for：By the exhaust gas temperatureBring following public affairs into
Formula calculates the variation delta q of the boiler exhaust gas heat loss2：
Wherein, q2For the boiler exhaust gas heat loss design load under the set environment temperature T.
In one embodiment, when steam turbine is air cooling unit, back pressure generation unit 503 is used for according to environment temperature to back pressure
Influence curve, obtain current environmental temperature under turbine back pressure.
In one embodiment, as shown in fig. 6, when the steam turbine is wet type cooling unit, back pressure generation unit 503 includes：Temperature
Poor computing module 601, delivery temperature calculate module 602 and back pressure generation module 603.
Differential thermal calculation module 601 is used to calculate the condenser outlet temperature difference according to the design data under load condition；
Delivery temperature calculates module 602 and is used for according to Inlet Temperature of Circulating Water and the differential thermal calculation actual exhaust air temperature；
Back pressure generation module 603 is used for according to the actual exhaust air temperature lookup water vapor pressure property list, is obtained described
The corresponding turbine back pressure of actual exhaust air temperature.
In one embodiment, differential thermal calculation module 601 is specifically used for：Water vapor pressure force characteristic is searched according to setting back pressure value
Table obtains exhaust temperature and condenser inflow temperature under the setting back pressure value；According to the exhaust temperature and condenser into
Coolant-temperature gage calculates the condenser outlet temperature difference.
In one embodiment, coal consumption influences computing unit 503 and is specifically used for：By the variation according to boiler exhaust gas heat loss
Measure Δ q2And the difference DELTA HRBring following formula, influence total amount Δ b of the computing environment temperature to unit coal consumption into：
Wherein, bstFor unit design coal consumption, g/kWh；ηBFor the boiler efficiency at a temperature of design environment, %；HRDFor design
Thermal loss of steam turbine under environment temperature, kJ/kWh.
Using the present invention, the influence for calculating variation of ambient temperature to Thermal generation unit coal consumption can be quantified, it is accurate to calculate
External condition deviation, and then study generating set finally attainable efficiency level.
It should be understood by those skilled in the art that, the embodiment of the present invention can be provided as method, system or computer program
Product.Therefore, the reality in terms of complete hardware embodiment, complete software embodiment or combination software and hardware can be used in the present invention
Apply the form of example.Moreover, the computer for wherein including computer usable program code in one or more can be used in the present invention
The computer program production that usable storage medium is implemented on (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.)
The form of product.
The present invention be with reference to according to the method for the embodiment of the present invention, the flow of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that it can be realized by computer program instructions every first-class in flowchart and/or the block diagram
The combination of flow and/or box in journey and/or box and flowchart and/or the block diagram.These computer programs can be provided
The processor of all-purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices is instructed to produce
A raw machine so that the instruction performed by computer or the processor of other programmable data processing devices is generated for real
The device for the function of being specified in present one flow of flow chart or one box of multiple flows and/or block diagram or multiple boxes.
These computer program instructions, which may also be stored in, can guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works so that the instruction generation being stored in the computer-readable memory includes referring to
Make the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one box of block diagram or
The function of being specified in multiple boxes.
These computer program instructions can be also loaded into computer or other programmable data processing devices so that counted
Series of operation steps is performed on calculation machine or other programmable devices to generate computer implemented processing, so as in computer or
The instruction offer performed on other programmable devices is used to implement in one flow of flow chart or multiple flows and/or block diagram one
The step of function of being specified in a box or multiple boxes.
It applies specific embodiment in the present invention to be set forth the principle of the present invention and embodiment, above example
Explanation be only intended to help understand the present invention method and its core concept；Meanwhile for those of ordinary skill in the art,
Thought according to the invention, there will be changes in specific embodiments and applications, in conclusion in this specification
Appearance should not be construed as limiting the invention.
Claims (6)
- A kind of 1. computational methods that variation of ambient temperature influences Thermal generation unit coal consumption, which is characterized in that the calculating Method includes：Under set environment temperature T, air preheater entrance wind-warm syndrome and air preheater entrance flue gas temperature are obtained, and according to institute It states air preheater entrance wind-warm syndrome and air preheater entrance flue gas temperature calculates exhaust gas temperatureAccording to the exhaust gas temperatureCalculate the variation delta q of boiler exhaust gas heat loss2；Influence based on environment temperature to back pressure obtains turbine back pressure；LP Turbine Exhaust Pressure Correction Curves are searched according to the turbine back pressure, obtain the actual heat consumption H under the turbine back pressureR With designing heat consumption HRTHADifference DELTA HR；According to the variation delta q of boiler exhaust gas heat loss2And the difference DELTA HRInfluence of the computing environment temperature to unit coal consumption is total Measure Δ b；Exhaust gas temperature is calculated according to the air preheater entrance wind-warm syndrome and air preheater entrance flue gas temperatureBag It includes：The air preheater entering air temperature and air preheater entrance flue gas temperature are brought into following formula, described in calculating Exhaust gas temperature<mrow> <msubsup> <mi>&theta;</mi> <mrow> <mi>L</mi> <mi>v</mi> </mrow> <mi>T</mi> </msubsup> <mo>=</mo> <mfrac> <mrow> <mi>T</mi> <mrow> <mo>(</mo> <msub> <mi>&theta;</mi> <mrow> <mi>E</mi> <mi>n</mi> </mrow> </msub> <mo>-</mo> <msub> <mi>&theta;</mi> <mrow> <mi>L</mi> <mi>v</mi> </mrow> </msub> <mo>)</mo> </mrow> <mo>+</mo> <msub> <mi>&theta;</mi> <mrow> <mi>E</mi> <mi>n</mi> </mrow> </msub> <mrow> <mo>(</mo> <msub> <mi>&theta;</mi> <mrow> <mi>L</mi> <mi>v</mi> </mrow> </msub> <mo>-</mo> <msub> <mi>t</mi> <mrow> <mi>E</mi> <mi>n</mi> </mrow> </msub> <mo>)</mo> </mrow> </mrow> <mrow> <mo>(</mo> <msub> <mi>&theta;</mi> <mrow> <mi>E</mi> <mi>n</mi> </mrow> </msub> <mo>-</mo> <msub> <mi>t</mi> <mrow> <mi>E</mi> <mi>n</mi> </mrow> </msub> <mo>)</mo> </mrow> </mfrac> </mrow>Wherein, θEnFor air preheater entrance flue gas temperature, θLvFor air preheater exit gas temperature, tEnAir preheater Entering air temperature；According to the exhaust gas temperatureCalculate the variation delta q of boiler exhaust gas heat loss2, including：By the exhaust gas temperatureIt brings following formula into, calculates the variation delta q of the boiler exhaust gas heat loss2：<mrow> <msub> <mi>&Delta;q</mi> <mn>2</mn> </msub> <mo>=</mo> <msub> <mi>q</mi> <mn>2</mn> </msub> <mfrac> <mrow> <mo>(</mo> <msub> <mi>&theta;</mi> <mrow> <mi>L</mi> <mi>v</mi> </mrow> </msub> <mo>-</mo> <msub> <mi>t</mi> <mrow> <mi>E</mi> <mi>n</mi> </mrow> </msub> <mo>)</mo> <mo>-</mo> <mo>(</mo> <msubsup> <mi>&theta;</mi> <mrow> <mi>L</mi> <mi>v</mi> </mrow> <mi>T</mi> </msubsup> <mo>-</mo> <mi>T</mi> <mo>)</mo> </mrow> <mrow> <msubsup> <mi>&theta;</mi> <mrow> <mi>L</mi> <mi>v</mi> </mrow> <mi>T</mi> </msubsup> <mo>-</mo> <mi>T</mi> </mrow> </mfrac> </mrow>Wherein, q2For the boiler exhaust gas heat loss design load under the set environment temperature T；When the steam turbine is wet type cooling unit, the influence based on environment temperature to back pressure obtains turbine back pressure, including：The condenser outlet temperature difference is calculated or, under conditions of condenser heating surface is constant according to the design data under load condition, The condenser outlet temperature difference is pre-set value；According to Inlet Temperature of Circulating Water and the differential thermal calculation actual exhaust air temperature；According to the actual exhaust air temperature lookup water vapor pressure property list, the corresponding steam turbine of the actual exhaust air temperature is obtained Back pressure；According to the variation delta q of boiler exhaust gas heat loss2And the difference DELTA HRInfluence of the computing environment temperature to unit coal consumption is total Δ b is measured, including：By the variation delta q according to boiler exhaust gas heat loss2And the difference DELTA HRBring following formula, computing environment temperature into Spend the influence total amount Δ b to unit coal consumption：<mrow> <mi>&Delta;</mi> <mi>b</mi> <mo>=</mo> <mfrac> <mrow> <msub> <mi>&Delta;q</mi> <mn>2</mn> </msub> </mrow> <msub> <mi>&eta;</mi> <mi>B</mi> </msub> </mfrac> <msub> <mi>b</mi> <mrow> <mi>s</mi> <mi>t</mi> </mrow> </msub> <mo>+</mo> <mfrac> <mrow> <msub> <mi>&Delta;H</mi> <mi>R</mi> </msub> </mrow> <msub> <mi>H</mi> <mrow> <mi>R</mi> <mi>D</mi> </mrow> </msub> </mfrac> <msub> <mi>b</mi> <mrow> <mi>s</mi> <mi>t</mi> </mrow> </msub> <mo>;</mo> </mrow>Wherein, bstFor unit design coal consumption, g/kWh；ηBFor the boiler efficiency at a temperature of design environment, %；HRDFor design environment At a temperature of thermal loss of steam turbine, kJ/kWh.
- 2. the computational methods that variation of ambient temperature according to claim 1 influences Thermal generation unit coal consumption, feature It is, when the steam turbine is air cooling unit, the influence based on environment temperature to back pressure obtains turbine back pressure, including：Root According to environment temperature to the influence curve of back pressure, the turbine back pressure under current environmental temperature is obtained.
- 3. the computational methods that variation of ambient temperature according to claim 1 influences Thermal generation unit coal consumption, feature It is, the condenser outlet temperature difference is calculated according to the design data under load condition, including：Water vapor pressure property list is searched according to setting back pressure value, obtains exhaust temperature and condenser under the setting back pressure value Inflow temperature；The condenser outlet temperature difference is calculated according to the exhaust temperature and condenser inflow temperature.
- A kind of 4. computing device that variation of ambient temperature influences Thermal generation unit coal consumption, which is characterized in that the calculating Device includes：Exhaust gas temperature computing unit, under set environment temperature T, acquisition air preheater entrance wind-warm syndrome and air to be pre- Hot device entrance flue gas temperature, and boiler is calculated according to the air preheater entrance wind-warm syndrome and air preheater entrance flue gas temperature Exhaust gas temperatureVariable quantity computing unit, for according to the exhaust gas temperatureCalculate the variation delta q of boiler exhaust gas heat loss2；Back pressure generation unit, for obtaining turbine back pressure based on influence of the environment temperature to back pressure；Heat consumption differential value generation unit for searching LP Turbine Exhaust Pressure Correction Curves according to the turbine back pressure, obtains the vapour Actual heat consumption H under turbine back pressureRWith designing heat consumption HRTHADifference DELTA HR；Coal consumption influences computing unit, for the variation delta q according to boiler exhaust gas heat loss2And the difference DELTA HRComputing environment Influence total amount Δ b of the temperature to unit coal consumption；The exhaust gas temperature computing unit is specifically used for：By the air preheater entering air temperature and air preheater Entrance flue gas temperature brings following formula into, calculates the exhaust gas temperature<mrow> <msubsup> <mi>&theta;</mi> <mrow> <mi>L</mi> <mi>v</mi> </mrow> <mi>T</mi> </msubsup> <mo>=</mo> <mfrac> <mrow> <mi>T</mi> <mrow> <mo>(</mo> <msub> <mi>&theta;</mi> <mrow> <mi>E</mi> <mi>n</mi> </mrow> </msub> <mo>-</mo> <msub> <mi>&theta;</mi> <mrow> <mi>L</mi> <mi>v</mi> </mrow> </msub> <mo>)</mo> </mrow> <mo>+</mo> <msub> <mi>&theta;</mi> <mrow> <mi>E</mi> <mi>n</mi> </mrow> </msub> <mrow> <mo>(</mo> <msub> <mi>&theta;</mi> <mrow> <mi>L</mi> <mi>v</mi> </mrow> </msub> <mo>-</mo> <msub> <mi>t</mi> <mrow> <mi>E</mi> <mi>n</mi> </mrow> </msub> <mo>)</mo> </mrow> </mrow> <mrow> <mo>(</mo> <msub> <mi>&theta;</mi> <mrow> <mi>E</mi> <mi>n</mi> </mrow> </msub> <mo>-</mo> <msub> <mi>t</mi> <mrow> <mi>E</mi> <mi>n</mi> </mrow> </msub> <mo>)</mo> </mrow> </mfrac> </mrow>Wherein, θEnFor air preheater entrance flue gas temperature, θLvFor air preheater exit gas temperature, tEnAir preheater Entering air temperature；The variable quantity computing unit is specifically used for：By the exhaust gas temperatureIt brings following formula into, calculates the boiler The variation delta q of heat loss due to exhaust gas2：<mrow> <msub> <mi>&Delta;q</mi> <mn>2</mn> </msub> <mo>=</mo> <msub> <mi>q</mi> <mn>2</mn> </msub> <mfrac> <mrow> <mo>(</mo> <msub> <mi>&theta;</mi> <mrow> <mi>L</mi> <mi>v</mi> </mrow> </msub> <mo>-</mo> <msub> <mi>t</mi> <mrow> <mi>E</mi> <mi>n</mi> </mrow> </msub> <mo>)</mo> <mo>-</mo> <mo>(</mo> <msubsup> <mi>&theta;</mi> <mrow> <mi>L</mi> <mi>v</mi> </mrow> <mi>T</mi> </msubsup> <mo>-</mo> <mi>T</mi> <mo>)</mo> </mrow> <mrow> <msubsup> <mi>&theta;</mi> <mrow> <mi>L</mi> <mi>v</mi> </mrow> <mi>T</mi> </msubsup> <mo>-</mo> <mi>T</mi> </mrow> </mfrac> </mrow>Wherein, q2For the boiler exhaust gas heat loss design load under the set environment temperature T；When the steam turbine is wet type cooling unit, the back pressure generation unit includes：Differential thermal calculation module, for being calculated according to the design data under load condition, condenser exports the temperature difference or, the temperature difference presets mould Block, for presetting the condenser outlet temperature difference；Delivery temperature calculates module, for according to Inlet Temperature of Circulating Water and the differential thermal calculation actual exhaust air temperature；Back pressure generation module, for according to the actual exhaust air temperature lookup water vapor pressure property list, obtaining the actual row The corresponding turbine back pressure of temperature degree；The coal consumption influences computing unit and is specifically used for：By the variation delta q according to boiler exhaust gas heat loss2And the difference It is worth Δ HRBring following formula, influence total amount Δ b of the computing environment temperature to unit coal consumption into：<mrow> <mi>&Delta;</mi> <mi>b</mi> <mo>=</mo> <mfrac> <mrow> <msub> <mi>&Delta;q</mi> <mn>2</mn> </msub> </mrow> <msub> <mi>&eta;</mi> <mi>B</mi> </msub> </mfrac> <msub> <mi>b</mi> <mrow> <mi>s</mi> <mi>t</mi> </mrow> </msub> <mo>+</mo> <mfrac> <mrow> <msub> <mi>&Delta;H</mi> <mi>R</mi> </msub> </mrow> <msub> <mi>H</mi> <mrow> <mi>R</mi> <mi>D</mi> </mrow> </msub> </mfrac> <msub> <mi>b</mi> <mrow> <mi>s</mi> <mi>t</mi> </mrow> </msub> <mo>;</mo> </mrow>Wherein, bstFor unit design coal consumption, g/kWh；ηBFor the boiler efficiency at a temperature of design environment, %；HRDFor design environment At a temperature of thermal loss of steam turbine, kJ/kWh.
- 5. the computing device that variation of ambient temperature according to claim 4 influences Thermal generation unit coal consumption, feature It is, when the steam turbine is air cooling unit, the back pressure generation unit is used for bent according to influence of the environment temperature to back pressure Line obtains the turbine back pressure under current environmental temperature.
- 6. the computing device that variation of ambient temperature according to claim 4 influences Thermal generation unit coal consumption, feature It is, the differential thermal calculation module is specifically used for：Water vapor pressure property list is searched according to setting back pressure value, obtains the setting Exhaust temperature and condenser inflow temperature under back pressure value；It is calculated according to the exhaust temperature and condenser inflow temperature described solidifying Vapour device exports the temperature difference.
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