Feasibility Analysis on BEST Technology for Ultra Supercritical Units with Double-Reheat Cycle

doi:10.11930/j.issn.1004-9649.201804011

Abstract

Abstract: To lower the superheat degree of the extraction steam of the heat regenerative system and improve the economic efficiency of the double-reheat power generating units, an energy-saving plan with the backpressure extraction steam turbine (BEST) allocated is proposed. Through the introduction of the BEST characteristics such as heat recovery steam source, exhaust direction and material selection, the technical issues in the design, manufacturing, operation and control of the double-reheat power generating units adopting BEST are presented, and the feasibility and economic performance of BEST used in high-parameter double-reheat power generating units are also analyzed. The analysis results show that with the BEST technology adopted, the investment of single unit can be reduced by about 24 million RMB while the annual profit can be increased by about 45 million RMB.

Key words: coal-fired power generation, double-reheat cycle, heat regenerative system, backpressure extraction steam turbine (BEST), AC excited motor, speed governor

CLC Number:

TK262

DENG Pan, WANG Yajun. Feasibility Analysis on BEST Technology for Ultra Supercritical Units with Double-Reheat Cycle[J]. Electric Power, 2018, 51(7): 84-89.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.201804011

https://www.electricpower.com.cn/EN/Y2018/V51/I7/84

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