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Steam turbine high-available design method and its evaluating method

A technology of design method and evaluation method, applied in the field of steam turbine

Inactive Publication Date: 2008-10-08
SHANGHAI POWER EQUIP RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is no suitable method for the quantitative evaluation and improvement of steam turbine availability design

Method used

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  • Steam turbine high-available design method and its evaluating method
  • Steam turbine high-available design method and its evaluating method
  • Steam turbine high-available design method and its evaluating method

Examples

Experimental program
Comparison scheme
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Embodiment

[0051] Such as figure 1 As shown, a certain type of subcritical 600MW steam turbine with an inlet steam temperature of 538°C is composed of a steam turbine body, an automatic control subsystem, an oil supply and lubricating oil subsystem, a thermal monitoring and protection subsystem, a steam seal and a hydrophobic subsystem. usability block diagram as figure 2 shown.

[0052] Such as image 3 Shown, be the flow chart of the method adopted in the present invention, the design method of steam turbine high availability and evaluation method thereof are:

[0053] Firstly, according to the steam inlet temperature of the steam turbine is 538°C, the high and medium pressure rotors are made of CrMoV steel, the blades of the first stage of high pressure and medium pressure are made of CrMoV steel, the inner cylinder and the steam inlet chamber are made of 1% CrMo steel, and calculated from Table 1, k 1=0+0.002+0.002+0.002=0.006; the strength design is all qualified, calculated fro...

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Abstract

The present invented method includes determining design synthesis coefficient Ak, determining steam turbine noumenal availability AP 1, determining steam turbine autocontrol subsystem availability AP 2, determining steam turbine oil servicing and lubricating oil subsystem availability AP 3, determining steam turbine heat engineering monitor and protected subsystem availability AP 4, determining steam turbine vapour lock and dewatering subsystem availability AP 5, determining steam turbine scheduled outage coefficient POF, calculating steam turbine availability coefficient AF, finally evaluating result, only scheme turnaround year steam turbine availability coefficient AF >= 0.92 and steam turbine designed usability reaching fineness value, otherwise to proceed improved design until turnaround year steam turbine availability coefficient availability coefficient AF >= 0.92 and reaching fineness value. Said invention has advantages of in design stage capable of quantitative calculating, quantitative evaluation and effectively raising steam turbine availability coefficient.

Description

technical field [0001] The invention relates to a high-availability design method of a steam turbine and an evaluation method thereof, which are applied to the design calculation and improvement of the availability of the steam turbine and belong to the technical field of the steam turbine. Background technique [0002] A steam turbine is composed of a steam turbine body, an automatic control subsystem, an oil supply and lubricating oil subsystem, a thermal monitoring and protection subsystem, a steam seal and a drainage subsystem. The index for evaluating the availability of a steam turbine is the availability coefficient. In the use stage of the steam turbine, the statistical results of the available coefficient of the steam turbine in the use stage can be determined through the statistical analysis of the operation data of the steam turbine, but the available coefficient of the design of the steam turbine cannot be determined in the design stage. The existing steam turbin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 史进渊杨宇邓志成危奇
Owner SHANGHAI POWER EQUIP RES INST
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