An Efficient Summer Operation Scheme for a Thermal Power Plant Air Cooling System based on Electric Peak Shaving

作     者：HU Hemin LIANG Shiqiang JIANG Yuyan GUO Yongxian HU Hemin;LIANG Shiqiang;JIANG Yuyan;GUO Yongxian

作者机构：Heat and Mass Transter Research CenterInstitute of Engineering ThermophysicsChinese Academy of SciencesBeijing 100190China University of Chinese Academy of SciencesBeijing 100049China 

出 版 物：《Journal of Thermal Science》 (热科学学报（英文版）)

年 卷 期：2020年第29卷第2期

页      面：393-407页

核心收录：

学科分类：080802[工学-电力系统及其自动化] 0808[工学-电气工程] 08[工学] 

基　　金：Financial support from the National Natural Science Foundation of China(NSFC)project(Grant No.51806217) International Cooperation Project(Grant No.2016YFE0118100) Strategic Priority Research Program of the Chinese Academy of Sciences(Grant No.XDA 21010201)is gratefully acknowledged 

主　　题：thermal power reconstruction air cooled condenser(ACC) indirect air cooling system peak-shaving absorption-generation equipment 

摘      要：We proposed a novel efficient operation scheme for a thermal power plant’s air-cooling system based on peak shaving, in order to cope with high ambient temperature in summer. We introduced an absorptiongeneration equipment with water/lithium working pairs into the air cooled condenser(ACC) to reconstruct the traditional thermal power plant, and established a dynamic thermodynamic model adopting Ebsilon code. We studied the thermodynamic performance variation of the reconstructed thermal power plant throughout a 24-hour cycle and found that the fluctuation ratio of the turbine back pressure decreased to 6% from 78%, which is beneficial for the stable and safe operation of the electric power system. The thermal performance improvement benefited from the exploitation of the heat transfer potential of ACC, which realized via cold duty schedule throughout the day, under different ambient temperature conditions. In this system, the generated power was higher at relatively high ambient temperature than that at relatively low ambient temperature, which solved the electricity demand-supply imbalance problem under high ambient temperature. Finally, the same optimization effects for power thermal plants with an indirect air-cooling system were obtained using the same operation scheme.