Study of the Energy Consumption Characteristic of a 1000MW Ultra-Supercritical Unit

Abstract:

A 1000MW ultra-supercritical unit was studied to gain the energy consumption characteristics by means of thermodynamic analysis. Comparing with the designed conditions, the power generation efficiency under real operation is much less; especially under 50% and 100% rated loads. The higher superheated steam temperature and lower reheat temperature were found to explain that. At the real running, the higher superheated steam temperature induced more attemperation water, while reheat temperature lower than the designed point would decrease the power output. Aiming at solving issues about temperature control in unit operation, several details could be paid extra attention to. For instance, attemperating water comes from outlet of the high-pressure heaters would have a much slighter influence on generating efficiency.

• Periodical: Advanced Materials Research (Volumes 860-863)
• Pages: 629-633
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.860-863.629
• Online since: December 2013
• Authors: Feng Ping Pan, Shi He Chen, Ya Qing Zhu, Zhi Qiang Pang, Shu Mei Wu, Ya Wen Cao, Yan Fen Liao*, Xiao Qian Ma
• Keywords: Attemperation Water, Energy Consumption Characteristics, Ultra-Supercritical Unit

References

[1] Zutian Cheng, Ling Yang, Energy and exergy analysis of a 1000MW Ultra supercritical power unit, Turbine technology. 54 (2012) 385-388 (In Chinese).

[2] Y.C. Cao, Development of ultra-supercritical power plant in China. Challenges of Power Engineering and Environment, 1-2 (2007) 231-236.

DOI: 10.1007/978-3-540-76694-0_42

[3] Caowei Wang, Analyses and study on the thermal economy in 600MW ultra super critical unit of power plant , Baoding, 2007 (In Chinese).

[4] Wangchao Lin, Coal-fire power plant thermal system energy saving theory, Xi'an, 1994 (In Chinese).

[5] J. Xiong, H.B. Zhao, C.G. Zheng, Techno-economic evaluation of oxy-combustion coal-fired power plants , Chinese Science Bulletin, 56 (2011), 3333-3345.

DOI: 10.1007/s11434-011-4707-5

[6] Tikuan Zheng, Thermal energy and power, Beijing, 2001 (In Chinese).

[7] Zhenqi Zhou , Baofeng Li, Bingwen Zhang, Effect on thermal economy of generator sets due to watering temperature adjustment, Boiler technology, 37 (2006) , 15-18 (In Chinese).

[8] Wei Zhan, Jizhen Liu, Yanjun Li, Deliang Zeng, WeiWang, Thermal economy calculation of desuperheating water system for the coal-fired power uint, East China Electric Power, 39 (2011), 964-967 (In Chinese).