|
|
|
Abstract Based on the circulating water pump (CWP) optimal operation model, with the whole circulating cooling water system as the subject, taking influences of different weather conditions fully on CWP optimal operation into consideration, a new kind of equivalent profit curve and corresponding net earning power curve was drawn to directly guide CWP optimal operation.Taking a 660 MW power plant for example, the proposed and previous equivalent profit curves were compared and analyzed. The results show that,the proposed equivalent profit curves can always effectively guide the CWP optimal operation. However, the CWP operation mode based on the existing equivalent profit curves is not always optimal, and the CWP optimal operation mode possibly changes due to the working CWP operation modes. In the meantime, by applying the proposed equivalent profit curves and net earning power curves, the CWP optimal operation in the 660 MW power plant was technically and economically analyzed. By comparing net earning power curves under different loads, it is found that, under summertime high temperature conditions, the operation cost of circulating cooling water system under low load may be higher than that under high load.
|
|
Received: 09 October 2012
Published: 25 June 2013
|
|
|
|
| ［1］Mijakoviski V, Mitervski V.Possible efficiency improvement by application of various operating regimes for cooling water pump station at thermal power plant Bitola［J］. Thermal Science, 2012, 16(1):263-270.［2］夏东伟,张承慧,石庆升. 电厂循环水系统优化控制及其遗传算法求解［J］. 山东大学学报:工学版,2005,35(2):50-55.Xia Dongwei, Zhang Chenghui, Shi Qingsheng. Optimal control of circulation pumps in power plant and its solution based on genetic algorithm［J］. Journal of Shandong University:Engineering Science Edition, 2005, 35(2):50-55. (in Chinese)［3］李勇,曹丽华,赵金峰,等. 考虑更多因素的凝汽器最佳真空的确定［J］. 中国电机工程学报,2006,26(4):71-75.Li Yong, Cao Lihua, Zhao Jinfeng, et al. The determination method of the optimum vacuum of condenser taking account of more actors［J］. Proceedings of the CSEE, 2006, 26(4):71-75. (in Chinese)［4］张蕾,魏龙,冯飞,等. 基于电站价值理论的电站循泵优化及系统开发［J］. 排灌机械工程学报,2011,29(2):143-148.Zhang Lei, Wei Long, Feng Fei, et al. Optimization and system development of circulating water pump in thermal power plant based on theory of energy value［J］. Journal of Drainage and Irrigation Machinery Engineering, 2011, 29(2):143-148. (in Chinese)［5］黄新元,赵丽,安越里,等. 火电厂单元制循环水系统离散优化模型及其应用［J］. 热能动力工程,2004,19(3):302-305.Huang Xinyuan, Zhao Li, An Yueli, et al. A discrete optimized model for the monobloc configured circulating water system of a thermal power plant and its application［J］. Journal of Engineering for Thermal Energy ＆ Power, 2004, 19(3):302-305. (in Chinese)［6］王爱军,李艳华,张小桃,等. 循环水泵运行方式的在线分析与研究［J］. 汽轮机技术,2005,47(2):130-132.Wang Aijun, Li Yanhua, Zhang Xiaotao, et al. Online analysis and research on optimum operation style of circulating pump［J］.Turbine Technology, 2005, 47(2):130-132. (in Chinese)［7］赵斌,张晓亮,刘玲. 汽轮机凝汽器最佳真空的影响因素及确定方法［J］. 河北理工大学学报：自然科学版,2007,29(4):85-90.Zhao Bin, Zhang Xiaoliang, Liu Ling. Determination method of the optimum vacuum in the condenser of steam turbine［J］. Journal of Hebei Polytechnic University:Natural Science Edition, 2007, 29(4):85-90. (in Chinese)［8］刘吉臻,王玮,曾德良,等. 火电机组定速循环水泵的全工况运行优化［J］. 动力工程学报,2011,31(9):682-688.Liu Jizhen, Wang Wei, Zeng Deliang, et al. Operation optimization of constspeed circulating water pumps in a thermal power plant under full conditions［J］. Journal of Chinese Society of Power Engineering, 2011, 31(9):682-688. (in Chinese)［9］王玮,曾德良,杨婷婷,等. 基于凝汽器压力估算法的循环水泵最优运行［J］. 中国电机工程学报,2010,30(14):7-12.Wang Wei, Zeng Deliang, Yang Tingting, et al. The optimum running of circulation water pumps based on estimated condenser pressure［J］. Proceedings of the CSEE, 2010, 30(14):7-12. (in Chinese)［10］周兰欣,杨靖,杨祥良. 300 MW直接空冷机组变工况特性［J］. 中国电机工程学报,2007,27(17):78-82.Zhou Lanxin, Yang Jing, Yang Xiangliang. Study on variable condition features for 300 MW direct aircooling unit［J］. Proceedings of the CSEE, 2007, 27(17):78-82. (in Chinese)［11］杨立军,杜小泽,杨勇平,等. 火电站直接空冷凝汽器性能考核评价方法［J］. 中国电机工程学报,2007,27(2):59-63.Yang Lijun, Du Xiaoze, Yang Yongping, et al. Performance evaluation for direct aircooled steam condensers in power plant［J］. Proceedings of the CSEE, 2007, 27(2):59-63. (in Chinese)［12］ Harish R, Subhramanyan E E, Madhavan R, et al. Theoretical model for evaluation of variable frequency drive for cooling water pumps in sea water based once through condenser cooling water systems［J］. Applied Thermal Engineering, 2010, 30(14):2051-2057.［13］Lakovic M S, Stojiljkovic M M, Lakovic S V, et al. Impact of the cold end operating conditions on energy efficiency of the steam power plants［J］. Thermal Science, 2010, 14(5):S53-S66.［14］Ganan J, Rahman A, Gonzalez J F，et al. Influence of the cooling circulating water on the efficiency of a thermonuclear plant［J］. Applied Thermal Engineering, 2005, 25(4):485-494.［15］Asvapoositkul W, Treeutok S. A simplified method on thermal performance capacity evaluation of counter flow cooling tower［J］. Applied Thermal Engineering, 2012, 38(1):160-167.［16］陈德辉,薛纪善. 数值天气预报业务模式现状与展望［J］. 气象学报,2004,62(5):623-633.Chen Dehui, Xue Jishan. An overview on recent progresses of the operational numerical weather prediction models［J］. Acta Meteorologica Sinica, 2004, 62(5):623-633. (in Chinese) |
|
|
