The Application and Analysis of Fast Cooling System in Siemens 1 000-MW-Turbines

doi:10.11930/j.issn.10.11930.2015.11.7

Abstract

Abstract: Generally, some certain time of turning gear is needed after a steam turbine shutdown. However, long-time turning gear will definitely extend the overhaul period and increase the operating costs of the related oil system. For the purpose of shortening the repairing period and conserving energy, fast cooling is adopted to accelerate the cooling rate of the internal components and reduce the turning gear period after the turbo set outages. Under natural cooling conditions, it takes about 12 to 15 days from turbine tripping to turning gear being switched off; but when fast cooling is adopted, it takes less than 5 days, saving 7 days at least. Regarding the typical fast cooling cases of Siemens 1 000-MW steam turbine, this paper presents the fast cooling operating procedures and analyzes some existing problems, and finally summarizes the procedure and controls for reference.

Key words: steam turbine, fast cooling, turning gear, 1 000 MW unit

CLC Number:

TM621
TK267

SU Guoqiang, WANG Donghui, SHI Jun. The Application and Analysis of Fast Cooling System in Siemens 1 000-MW-Turbines[J]. journal1, 2015, 48(11): 7-12.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.10.11930.2015.11.7

https://www.electricpower.com.cn/EN/Y2015/V48/I11/7

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