摘要
直接空冷机组高背压供热方式受热网循环水回水温度和空冷岛换热单元协调控制的限制,运行经济性和发电出力两者之间难以平衡。为解决上述矛盾,采用商业软件Ebsilon Professional对直接空冷乏汽提质供热系统在不同负荷下的空冷岛背压、汽轮机出力、汽轮机热耗和喷射器引射比等关键性能进行了变工况计算和分析。计算结果表明,乏汽提质供热系统在冬季低负荷时最佳运行背压为13~20 kPa,可以实现供热能量的梯级利用和机组出力的平衡,并满足防冻安全的运行要求。
The high backpressure heating mode of direct air-cooling unit faces limitations due to the return water temperature of heat network and the coordinated heat exchanger unit control of air-cooling island.This limitation complicates the task of achieving a balance between operation economy and power generation output.To solve this inherent contradiction,Ebsilon Professional,a commercial software,is used to calculate and analyze the key pa⁃rameters of the direct air-cooling exhaust steam extraction heat supply system.These parameters include the back⁃pressure of the air-cooling island,steam turbine output and heat consumption,and suction coefficient of the injector under different loads and variable operating conditions.The calculations reveal that,during low load in winter,the optimal operating backpressure for the heat supply system falls within the range of 13~20 kPa,which allows for the gradient utilization of heating energy,ensures a balance in unit output,and meets the safety requirements for pre⁃venting freezing.
作者
邢岳
谭浩艺
裴东升
王东波
范诚豪
XING Yue;TAN Haoyi;PEI Dongsheng;WANG Dongbo;FAN Chenghao(Anhui Huainan Power Generation Co.,Ltd.,Huainan,Anhui 232000,China;Huaneng(Shanghai)Power Maintenance Co.,Ltd.,Shanghai 200942,China;North China Power Engineering Co.,Ltd.,Beijing 100120,China;Shanghai Power Equipment Research Institute Co.,Ltd.,Shanghai 200240,China)
出处
《浙江电力》
2023年第11期122-128,共7页
Zhejiang Electric Power
基金
国家电力投资集团公司科技支撑项目(SPICZGDL-KJ-2022024)。
关键词
乏汽提质供热
直接空冷
变工况特性
exhaust steam extraction heat supply
direct air-cooling
variable operating characteristic
