新型燃煤电厂热电联产系统节能优化分析  

Energy-saving optimization analysis of cogeneration system in new coal-fired power plant

作　　者：方亚雄 陈辉 吴影 FANG Yaxiong;CHEN Hui;WU Ying

机构地区：[1]国能南京电力试验研究有限公司,江苏南京210000 [2]东南大学,江苏南京210000

出　　处：《节能》2025年第1期14-17,共4页Energy Conservation

基　　金：国家能源集团科研专项(项目编号:GJNY-23-81)。

摘　　要：针对常规供热机组存在的换热过程(火用)损失大、抽汽量大导致汽轮机偏离设计工况等问题,将吸收式热泵技术、吸收式换热技术和高背压技术相结合,提出一种新型燃煤电厂热电联产方案,并基于某350 MW热电联产机组实际运行参数,对各方案进行热力学分析计算。结果表明,与常规热电联产方案相比,新方案降低了换热过程中的(火用)损失,回收了部分凝汽器释放的余热,在相同供热量下能够获得更多的发电量;在供热量不变的前提下,净发电量增加了14.89 MW,净发电效率提高了1.81%。In view of the exergic loss of exergic heat exchange of conventional heating units and the turbine departure from the designed working condition caused by a large amount of steam extraction,a new cogeneration scheme for coalfired power plants is proposed by combining absorption heat pump technology,absorption heat exchange technology and high back pressure technology.Based on the actual operating parameters of a 350 MW cogeneration unit,thermodynamic analysis and calculation of each scheme are carried out.The results show that compared with the conventional cogeneration scheme,the exergic loss of exergic decreased during heat transfer,part of the waste heat released by the condenser was recovered,and more power generation could be obtained under the same heat supply.Under the premise of constant heat supply,the net power generation increased by 14.89 MW and the net power generation efficiency increased by 1.81%.

关 键 词：燃煤电厂 热电联产 节能优化 余热利用 经济性分析 

分 类 号：TK262[动力工程及工程热物理—动力机械及工程]