CN109344423A - A kind of calculation method for closing the practical IP efficiency of cylinder steam turbine - Google Patents
A kind of calculation method for closing the practical IP efficiency of cylinder steam turbine Download PDFInfo
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Abstract
The present invention relates to a kind of calculation methods for closing the practical IP efficiency of cylinder steam turbine, this method are as follows: under three valve standard-sized sheet operating condition of Steam Turbine, by changing main steam temperature and reheat steam temperature, IP efficiency is drawn with the change curve of balancing frame steam loss, the crosspoint for calculating two curves finally obtains and closes the actual IP efficiency of cylinder steam turbine.The present invention determines the change rate of flow using change steam temperature method, by changing main steam temperature and reheat steam temperature indirectly, then is computed with the determining and most identical leakage steam flow amount of test data, and then calculate the efficiency for closing the practical intermediate pressure cylinder of cylinder steam turbine.
Description
Technical field
It is practical the invention belongs to close cylinder Steam Turbine Through IP Admission efficiency calculation technical field more particularly to a kind of conjunction cylinder steam turbine
The calculation method of IP efficiency.
Background technique
The steam turbine of most combined cycle generating units closes the structure of cylinder arrangement using high pressure cylinder (HP) and intermediate pressure cylinder (IP).
Change arrangement and is commonly known as counter flow design.Initial steam enters from cylinder body middle position, flows through high pressure cylinder actings at different levels,
High pressure cylinder steam discharge enters waste heat boiler reheater.The heating of steam reheating enters from cylinder body middle position again, reversely flows into intermediate pressure cylinder.
There is leakage vapour gap in this cylinder combined structure, which is commonly known as high intermediate pressure cylinder balancing frame leakage vapour between two cylinders.
High intermediate pressure cylinder balancing frame leakage vapour refers to along other gaps of the axle envelope or cylinder body of high pressure cylinder to intermediate pressure cylinder, from high pressure cylinder tune
Assistant warden leaks into the steam of intermediate pressure cylinder air chamber.The design of the steam turbine of this structure is to flow through given steam, to run
The middle cooling intermediate pressure cylinder first order.In order to determine the practical exhaust steam flow of high pressure cylinder and the true efficiency of intermediate pressure cylinder, it is necessary to determine senior middle school
Press balancing frame steam loss.Depending on opposed flow steam turbine gap and interstage pressure, which may be more than or less than design leakage
Steam flow amount.If the steam loss cannot be calculated accurately, the error of high pressure cylinder exhaust steam flow and IP efficiency will be caused.It determines high
Cylinder pressure to intermediate pressure cylinder steam loss can reduce the whole uncertainty of Turbine Performance Test.Because leakage vapour be inside steam turbine,
It can not directly measure, so calculating its steam loss by the way of measuring indirectly, and then obtain conjunction cylinder by way of calculating
The practical IP efficiency of steam turbine.
Summary of the invention
The object of the present invention is to provide a kind of calculation methods for closing the practical IP efficiency of cylinder steam turbine, by becoming steam temperature examination
It tests calculating and closes the practical IP efficiency of cylinder steam turbine.
The present invention provides a kind of calculation methods for closing the practical IP efficiency of cylinder steam turbine, in three valve standard-sized sheet of Steam Turbine
Under operating condition, by changing main steam temperature and reheat steam temperature, it is bent with the variation of balancing frame steam loss to draw IP efficiency
Line calculates the crosspoint of two curves, finally obtains and closes the actual IP efficiency of cylinder steam turbine.
Further, this method specifically comprises the following steps:
1) operating condition one reduces reheat steam temperature before intermediate pressure main stop valve, makes reheat steam temperature under three valve standard-sized sheet operating conditions
Lower than 30 DEG C of rated value, main steam temperature keeps rated value constant before high pressure cylinder main inlet throttle-stop valve, and generator active power keeps stablizing
It is constant, it keeps the stable state of such Turbo-generator Set one hour, acquired following measurement data every 30 seconds:
Main steam flow G0, kg/h；
Main steam pressure P0, temperature T0；
Pressure P after governing stagetj, temperature Ttj；
High pressure cylinder exhaust steam pressure P2, temperature T2；
Intermediate pressure cylinder initial steam pressure P10, temperature T10；
Intermediate pressure cylinder pressure at expulsion P3, temperature T3；
One section of extraction pressure P1, temperature T1；
Two sections of extraction pressure P2, temperature T2；
No. 1 high-pressure heater outlet pressure P1c, temperature T1c, drain temperature T1s；
No. 2 high-pressure heater outlet pressure P2c, temperature T2c, drain temperature T2s；
No. 2 inlet of high pressure heater pressure P3c, temperature T3c。
The pressure unit of above-mentioned parameter is MPa, and temperature unit is DEG C；
2) enthalpy of step 1) parameter is calculated by formula (1) to (12), wherein f of the formula (1) into (12) is the world
Formulation committee IFC-1967 water and steam property formula；
Main steam enthalpy h0=f0(P0, T0), kJ/kg； (1)
Enthalpy h after governing stagetj=ftj(Ptj, Ttj), kJ/kg； (2)
High pressure cylinder exhaust enthalpy h2=f2(P2, T2), kJ/kg； (3)
Intermediate pressure cylinder steam admission enthalpy h10=f10(P10, T10), kJ/kg； (4)
Intermediate pressure cylinder exhaust enthalpy h3=f3(P3, T3), kJ/kg； (5)
One section of steam extraction enthalpy h1=f1(P1, T1), kJ/kg； (6)
Two sections of steam extraction enthalpy h2=f2(P2, T2), kJ/kg； (7)
No. 1 high-pressure heater exports enthalpy h1c=f1c(P1c, T1c), kJ/kg； (8)
The hydrophobic enthalpy h of No. 1 high-pressure heater1s=f1s(P1, T1s), kJ/kg； (9)
No. 2 high-pressure heaters export enthalpy h2c=f2c(P2c, T2c), kJ/kg； (10)
The hydrophobic enthalpy h of No. 2 high-pressure heaters2s=f2s(P2, T2s), kJ/kg； (11)
No. 2 inlet of high pressure heater enthalpy h3c=f3c(P3c, T3c), kJ/kg； (12)
3) No. 1 high-pressure heater throttle flow G is calculated by formula (13) to (14) using heater thermal balance1, No. 2 high pressures
Heater throttle flow G2；
4) assume high intermediate pressure cylinder balancing frame steam loss N2The ratio for accounting for reheated steam amount is 1%, is calculated mixed into intermediate pressure cylinder
Steam enthalpy after conjunction is obtained by formula (15)；
Enthalpy after intermediate pressure cylinder mixing
Practical IP efficiency is calculated, is obtained by formula (16)；
IP efficiency
In formula: hsFor intermediate pressure cylinder steam discharge constant entropy enthalpy, kJ/kg；
5) assume high intermediate pressure cylinder balancing frame steam loss N2The ratio for accounting for reheated steam amount is 2%, 4%, 6%, 8%, is calculated
Into the mixed steam enthalpy of intermediate pressure cylinder, step 4) is repeated, calculates each IP efficiency under different proportion；
6) by high intermediate pressure cylinder balancing frame steam loss N2With IP efficiency ηIPDraw relation curve；
7) operating condition two reduce main steam temperature before main inlet throttle-stop valve under three valve standard-sized sheet operating conditions, make main steam temperature lower than specified
30 DEG C of value, reheat steam temperature keeps rated value constant before intermediate pressure main stop valve, and constant, holding is stablized in generator active power holding
The stable state of such Turbo-generator Set one hour acquired following measurement data every 30 seconds:
Main steam flow G0'；
Main steam pressure P0', temperature T0'；
Pressure P after governing stagetj', temperature Ttj'；
High pressure cylinder exhaust steam pressure P2', temperature T2'；
Intermediate pressure cylinder initial steam pressure P10', temperature T10'；
Intermediate pressure cylinder pressure at expulsion P3', temperature T3'；
One section of extraction pressure P1', temperature T1'；
Two sections of extraction pressure P2', temperature T2'；
No. 1 high-pressure heater outlet pressure P1c', temperature T1c', drain temperature T1s'；
No. 2 high-pressure heater outlet pressure P2c', temperature T2c', drain temperature T2s'；
No. 2 inlet of high pressure heater pressure P3c', temperature T3c'；
8) step 1) is repeated to the IP efficiency 6) calculated under operating condition two, draws high intermediate pressure cylinder balancing frame steam loss N2With
IP efficiency ηIPDraw relation curve；
9) the high intermediate pressure cylinder balancing frame steam loss N obtained respectively by step 6) and 8)2With IP efficiency ηIPLiang Tiaoguan
It is curved intersection point, obtains the efficiency for closing the practical intermediate pressure cylinder of cylinder steam turbine.
According to the above aspect of the present invention, using steam temperature method is become, being passed through by the calculation method for closing the practical IP efficiency of cylinder steam turbine
Change main steam temperature and reheat steam temperature and determine the change rate of flow indirectly, then is computed and is most kissed with determination with test data
The leakage steam flow amount of conjunction, and then calculate the efficiency for closing the practical intermediate pressure cylinder of cylinder steam turbine.
The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention,
And can be implemented in accordance with the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention and the accompanying drawings.
Detailed description of the invention
Fig. 1 is an a kind of Application Example of the calculation method for closing the practical IP efficiency of cylinder steam turbine of the present invention；
Fig. 2 is high intermediate pressure cylinder balancing frame steam loss of the present invention and intermediate pressure cylinder relation curve example.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiments of the present invention will be described in further detail.Implement below
Example is not intended to limit the scope of the invention for illustrating the present invention.
Present embodiments provide a kind of calculation method for closing the practical IP efficiency of cylinder steam turbine, this method are as follows: in steamer
Under three valve standard-sized sheet operating condition of unit, by changing main steam temperature and reheat steam temperature, draws IP efficiency and leaked with balancing frame
The change curve of vapour amount calculates the crosspoint of two curves, finally obtains and closes the actual IP efficiency of cylinder steam turbine.This method
Referred to as become steam temperature method.The basic principle for becoming steam temperature method is that Steam Turbine practical IP efficiency in parameter area is constant, senior middle school
Cylinder pressure balancing frame leaks influence of the cooling effect to nominal IP efficiency caused by vapour.The change rate of flow is led by changing
What vapor (steam) temperature determined indirectly with reheat steam temperature, then be computed with the determining and most identical practical intermediate pressure cylinder of test data
Efficiency.
Join shown in Fig. 1 and Fig. 2, carries out specific embodiment party by taking the overcritical HP-IP combined casing steam turbine of certain 300MW as an example below
The annotation of formula, steam turbine model: N300-16.7/537/537.
Close the calculation method of the practical IP efficiency of cylinder steam turbine are as follows: under Steam Turbine three valve standard-sized sheet (3VWO) operating condition,
By changing main steam temperature and reheat steam temperature, IP efficiency is drawn with the change curve of balancing frame steam loss, is calculated
The crosspoint of two curves finally obtains the efficiency for closing the practical intermediate pressure cylinder of cylinder steam turbine.Specifically comprise the following steps:
1) operating condition one reduces reheat steam temperature before intermediate pressure main stop valve, is lower than reheat steam temperature under 3VWO operating condition
30 DEG C of rated value, main steam temperature keeps rated value constant before high pressure cylinder main inlet throttle-stop valve, generator active power holding stablize it is constant,
It keeps the stable state of such Turbo-generator Set one hour, acquired following measurement data every 30 seconds:
Main steam flow G0=953900, kg/h；
Main steam pressure P0=16.5358MPa, temperature T0=537.47 DEG C；
Pressure P after governing stagetj=11.6783MPa, temperature Ttj=494.09 DEG C；
High pressure cylinder exhaust steam pressure P2=3.5280MPa, temperature T2=332.57 DEG C；
Intermediate pressure cylinder initial steam pressure P10=3.2692MPa, temperature T10=505.84 DEG C；
Intermediate pressure cylinder pressure at expulsion P3=0.5939MPa, temperature T3=277.56 DEG C；
One section of extraction pressure P1=6.1885MPa, temperature T1=413.42 DEG C；
Two sections of extraction pressure P2=3.4480MPa, temperature T2=329.98 DEG C；
No. 1 high-pressure heater outlet pressure P1c=18.1943MPa, temperature T1c=279.21 DEG C, drain temperature T1s=
249.83℃；
No. 2 high-pressure heater outlet pressure P2c=18.3396MPa, temperature T2c=241.25 DEG C, drain temperature T2s=
209.92℃；
No. 2 inlet of high pressure heater pressure P3c=18.4848MPa, temperature T3c=206.83 DEG C.
2) enthalpy of step 1) parameter is calculated by formula (1)-(12), wherein the f in formula (1)-(12) is international public
Shi Hua committee IFC-1967 water and steam property formula.
Main steam enthalpy h0=f0(P0, T0)=3397.30, kJ/kg； (1)
Enthalpy h after governing stagetj=ftj(Ptj, Ttj)=3338.04, kJ/kg； (2)
High pressure cylinder exhaust enthalpy h2=f2(P2, T2)=3062.90, kJ/kg； (3)
Intermediate pressure cylinder steam admission enthalpy h10=f10(P10, T10)=3466.28, kJ/kg； (4)
Intermediate pressure cylinder exhaust enthalpy h3=f3(P3, T3)=3015.65, kJ/kg； (5)
One section of steam extraction enthalpy h1=f1(P1, T1)=3210.70, kJ/kg； (6)
Two sections of steam extraction enthalpy h2=f2(P2, T2)=3058.45, kJ/kg； (7)
No. 1 high-pressure heater exports enthalpy h1c=f1c(P1c, T1c)=1227.94, kJ/kg； (8)
The hydrophobic enthalpy h of No. 1 high-pressure heater1s=f1s(P1, T1s)=1084.93, kJ/kg； (9)
No. 2 high-pressure heaters export enthalpy h2c=f2c(P2c, T2c)=1045.70, kJ/kg； (10)
The hydrophobic enthalpy h of No. 2 high-pressure heaters2s=f2s(P2, T2s)=897.91, kJ/kg； (11)
No. 2 inlet of high pressure heater enthalpy h3c=f3c(P3c, T3c)=889.94, kJ/kg； (12)
3) No. 1 high-pressure heater throttle flow G is calculated by formula (13)-(14) using heater thermal balance1, No. 2 high pressures
Heater throttle flow G2。
4) assume high intermediate pressure cylinder balancing frame steam loss N2The ratio for accounting for reheated steam amount is 1%, is calculated mixed into intermediate pressure cylinder
Steam enthalpy after conjunction is obtained by formula (15).
Enthalpy after intermediate pressure cylinder mixing
Practical IP efficiency is calculated, is obtained by formula (16).
IP efficiency
In formula: hs--- intermediate pressure cylinder steam discharge constant entropy enthalpy, kJ/kg.
5) assume high intermediate pressure cylinder balancing frame steam loss N2The ratio for accounting for reheated steam amount is 2%, 4%, 6%, 8%, is calculated
Into the mixed steam enthalpy of intermediate pressure cylinder, step 4) is repeated, calculates each IP efficiency under different proportion, as shown in table 1.
1 operating condition of table once balancing frame steam loss and middle pressure relationship between efficiency table
| Balancing frame leaks vapour accounting % | 1 | 2 | 4 | 6 | 8 |
| IP efficiency % | 90.4 | 90.22 | 89.88 | 89.54 | 89.22 |
6) by high intermediate pressure cylinder balancing frame steam loss N2With IP efficiency ηIPDraw relation curve.
7) operating condition two reduce main steam temperature before main inlet throttle-stop valve under 3VWO operating condition, make main steam temperature lower than rated value 30
DEG C, before intermediate pressure main stop valve reheat steam temperature keep rated value it is constant, generator active power holding stablize it is constant, keep it is such
The stable state of Turbo-generator Set one hour acquired following measurement data every 30 seconds:
Main steam flow G0'=992700, kg/h；
Main steam pressure P0'=16.6445MPa, temperature T0'=503.71 DEG C；
Pressure P after governing stagetj'=11.8189MPa, temperature Ttj'=460.59 DEG C；
High pressure cylinder exhaust steam pressure P2'=3.6279MPa, temperature T2'=304.39 DEG C；
Intermediate pressure cylinder initial steam pressure P10'=3.3644MPa, temperature T10'=537.66 DEG C；
Intermediate pressure cylinder pressure at expulsion P3'=0.6133MPa, temperature T3'=299.49 DEG C；
One section of extraction pressure P1'=6.2843MPa, temperature T1'=381.44 DEG C；
Two sections of extraction pressure P2'=3.5496MPa, temperature T2'=301.95 DEG C；
No. 1 high-pressure heater outlet pressure P1c'=18.3022MPa, temperature T1c'=279.44 DEG C, drain temperature T1s'=
251.01℃；
No. 2 high-pressure heater outlet pressure P2c'=18.4542MPa, temperature T2c'=242.06 DEG C, drain temperature T2s'=
211.68℃；
No. 2 inlet of high pressure heater pressure P3c'=18.6063MPa, temperature T3c'=208.41 DEG C.
(9) step 1) -6 is repeated) calculate the lower IP efficiency of operating condition two, drafting high intermediate pressure cylinder balancing frame steam loss N2With
IP efficiency ηIPRelation curve is drawn, as shown in table 2.
The lower balancing frame steam loss of 2 operating condition two of table and middle pressure relationship between efficiency table
| Balancing frame leaks vapour accounting % | 1 | 2 | 4 | 6 | 8 |
| IP efficiency % | 91.27 | 90.88 | 90.11 | 89.38 | 88.66 |
9) the high intermediate pressure cylinder balancing frame steam loss N obtained respectively by step 6) and 8)2With IP efficiency ηIPLiang Tiaoguan
It is curved intersection point, you can get it, and high intermediate pressure cylinder balancing frame leakage vapour rate is 5.26%, and steam loss 43147kg/h is pressed in practice
Cylinder efficiency is 89.7%, as shown in Figure 2.
For the steam turbine of high pressure cylinder and intermediate pressure cylinder cylinder combined structure, intermediate pressure cylinder is into steam flow amount by boiler reheater outlet stream
Amount and high pressure balancing frame leakage steam flow amount composition, enthalpy are different, it is necessary to are calculated by indirect test mode.Senior middle school
The basic principle of cylinder pressure balancing frame steam loss is to keep IP efficiency constant in parameter variation range, high intermediate pressure cylinder balancing frame
Leak influence of the cooling effect to nominal IP efficiency caused by vapour.The measurement method of the balancing frame steam loss is not necessarily to outer tipping
It sets or equipment, it is only necessary to can be calculated by acquisition unit DCS data itself by becoming steam temperature method.By becoming steam temperature
Method only needs to measure two operating conditions, under one: three valve standard-sized sheet operating condition of operating condition, reduces main steam temperature, keeps reheat steam temperature volume
It is fixed；Under two: three valve standard-sized sheet operating condition of operating condition, reheat steam temperature is reduced, keeps main steam temperature specified.
The above is only a preferred embodiment of the present invention, it is not intended to restrict the invention, it is noted that for this skill
For the those of ordinary skill in art field, without departing from the technical principles of the invention, can also make it is several improvement and
Modification, these improvements and modifications also should be regarded as protection scope of the present invention.
Claims (2)
1. a kind of calculation method for closing the practical IP efficiency of cylinder steam turbine, which is characterized in that in three valve standard-sized sheet work of Steam Turbine
Under condition, by changing main steam temperature and reheat steam temperature, IP efficiency is drawn with the change curve of balancing frame steam loss,
The crosspoint for calculating two curves finally obtains and closes the actual IP efficiency of cylinder steam turbine.
2. a kind of calculation method for closing the practical IP efficiency of cylinder steam turbine according to claim 1, which is characterized in that tool
Body includes the following steps:
1) operating condition one reduces reheat steam temperature before intermediate pressure main stop valve, is lower than reheat steam temperature under three valve standard-sized sheet operating conditions
30 DEG C of rated value, main steam temperature keeps rated value constant before high pressure cylinder main inlet throttle-stop valve, generator active power holding stablize it is constant,
It keeps the stable state of such Turbo-generator Set one hour, acquired following measurement data every 30 seconds:
Main steam flow G0, kg/h；
Main steam pressure P0, temperature T0；
Pressure P after governing stagetj, temperature Ttj；
High pressure cylinder exhaust steam pressure P2, temperature T2；
Intermediate pressure cylinder initial steam pressure P10, temperature T10；
Intermediate pressure cylinder pressure at expulsion P3, temperature T3；
One section of extraction pressure P1, temperature T1；
Two sections of extraction pressure P2, temperature T2；
No. 1 high-pressure heater outlet pressure P1c, temperature T1c, drain temperature T1s；
No. 2 high-pressure heater outlet pressure P2c, temperature T2c, drain temperature T2s；
No. 2 inlet of high pressure heater pressure P3c, temperature T3c。
The pressure unit of above-mentioned parameter is MPa, and temperature unit is DEG C；
2) enthalpy of step 1) parameter is calculated by formula (1) to (12), wherein f of the formula (1) into (12) is international formula
Change committee IFC-1967 water and steam property formula；
Main steam enthalpy h0=f0(P0, T0), kJ/kg； (1)
Enthalpy h after governing stagetj=ftj(Ptj, Ttj), kJ/kg； (2)
High pressure cylinder exhaust enthalpy h2=f2(P2, T2), kJ/kg； (3)
Intermediate pressure cylinder steam admission enthalpy h10=f10(P10, T10), kJ/kg； (4)
Intermediate pressure cylinder exhaust enthalpy h3=f3(P3, T3), kJ/kg； (5)
One section of steam extraction enthalpy h1=f1(P1, T1), kJ/kg； (6)
Two sections of steam extraction enthalpy h2=f2(P2, T2), kJ/kg； (7)
No. 1 high-pressure heater exports enthalpy h1c=f1c(P1c, T1c), kJ/kg； (8)
The hydrophobic enthalpy h of No. 1 high-pressure heater1s=f1s(P1, T1s), kJ/kg； (9)
No. 2 high-pressure heaters export enthalpy h2c=f2c(P2c, T2c), kJ/kg； (10)
The hydrophobic enthalpy h of No. 2 high-pressure heaters2s=f2s(P2, T2s), kJ/kg； (11)
No. 2 inlet of high pressure heater enthalpy h3c=f3c(P3c, T3c), kJ/kg； (12)
3) No. 1 high-pressure heater throttle flow G is calculated by formula (13) to (14) using heater thermal balance1, No. 2 hyperbaric heatings
Device throttle flow G2；
4) assume high intermediate pressure cylinder balancing frame steam loss N2The ratio for accounting for reheated steam amount is 1%, is calculated mixed into intermediate pressure cylinder
Steam enthalpy is obtained by formula (15)；
Practical IP efficiency is calculated, is obtained by formula (16)；
In formula: hsFor intermediate pressure cylinder steam discharge constant entropy enthalpy, kJ/kg；
5) assume high intermediate pressure cylinder balancing frame steam loss N2The ratio for accounting for reheated steam amount is 2%, 4%, 6%, 8%, is calculated in entering
The mixed steam enthalpy of cylinder pressure repeats step 4), calculates each IP efficiency under different proportion；
6) by high intermediate pressure cylinder balancing frame steam loss N2With IP efficiency ηIPDraw relation curve；
7) operating condition two reduce main steam temperature before main inlet throttle-stop valve under three valve standard-sized sheet operating conditions, make main steam temperature lower than rated value 30
DEG C, before intermediate pressure main stop valve reheat steam temperature keep rated value it is constant, generator active power holding stablize it is constant, keep it is such
The stable state of Turbo-generator Set one hour acquired following measurement data every 30 seconds:
Main steam flow G0'；
Main steam pressure P0', temperature T0'；
Pressure P after governing stagetj', temperature Ttj'；
High pressure cylinder exhaust steam pressure P2', temperature T2'；
Intermediate pressure cylinder initial steam pressure P10', temperature T10'；
Intermediate pressure cylinder pressure at expulsion P3', temperature T3'；
One section of extraction pressure P1', temperature T1'；
Two sections of extraction pressure P2', temperature T2'；
No. 1 high-pressure heater outlet pressure P1c', temperature T1c', drain temperature T1s'；
No. 2 high-pressure heater outlet pressure P2c', temperature T2c', drain temperature T2s'；
No. 2 inlet of high pressure heater pressure P3c', temperature T3c'；
8) step 1) is repeated to the IP efficiency 6) calculated under operating condition two, draws high intermediate pressure cylinder balancing frame steam loss N2With middle pressure
Cylinder efficiency etaIPDraw relation curve；
9) the high intermediate pressure cylinder balancing frame steam loss N obtained respectively by step 6) and 8)2With IP efficiency ηIPTwo relationship songs
Line crosspoint obtains the efficiency for closing the practical intermediate pressure cylinder of cylinder steam turbine.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111140293A (en) * | 2019-12-13 | 2020-05-12 | 大唐东北电力试验研究院有限公司 | Method for measuring steam leakage of balance disc of combined-cylinder steam turbine |
| CN113566186A (en) * | 2021-07-28 | 2021-10-29 | 西安热工研究院有限公司 | Boiler drum water level adjusting system and method after damage of regulating-stage pressure measuring point |
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