邢岳,谭浩艺,裴东升,王东波,范诚豪
XING Yue,TAN Haoyi,PEI Dongsheng,WANG Dongbo,FAN Chenghao

• 1:安徽淮南平圩发电有限责任公司
• 2:华能(上海)电力检修有限责任公司
• 3:中国电力工程顾问集团华北电力设计院有限公司
• 4:上海发电设备成套设计研究院有限责任公司

摘要(Abstract)：

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 parameters of the direct air-cooling exhaust steam extraction heat supply system. These parameters include the backpressure 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 preventing freezing.

关键词(KeyWords)： 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

Abstract:

Keywords:

基金项目(Foundation): 国家电力投资集团公司科技支撑项目（SPICZGDL-KJ-2022024）

作者(Author): 邢岳,谭浩艺,裴东升,王东波,范诚豪
XING Yue,TAN Haoyi,PEI Dongsheng,WANG Dongbo,FAN Chenghao

DOI: 10.19585/j.zjdl.202311015

参考文献(References)：

• [1]江亿.华北地区大中型城市供暖方式分析[J].暖通空调，2000,30(4):30-32.JIANG Yi.Heating schemes analysis for medium and large cities in the North China[J].Hv&Ac,2000,30(4):30-32.
• [2]付林，狄洪发，江亿.天然气在城市供暖中的应用[J].暖通空调，2002,32(5):44-47.FU Lin,DI Hongfa,JIANG Yi.Application of natural gas to space heating in cities[J].Hv&Ac,2002,32(5):44-47.
• [3]金生祥.北京市的城市供暖方式优化研究[D].北京：清华大学，2014.JIN Shengxiang.Optimization of the heating model in Beijing[D].Beijing:Tsinghua University,2014.
• [4]黄治坤，岑岭山，李智华，等.330 MW空冷机组乏汽余热利用系统热压机性能分析及调整[J].中国电力，2020,53(12):277-283.HUANG Zhikun,CEN Lingshan,LI Zhihua,et al.Performance analysis and adjustment of thermocompressor in exhaust and waste heat utilization system of 330 MW air cooling unit[J].Electric Power,2020,53(12):277-283.
• [5]李岩，米培源，李文涛，等.大型机组乏汽余热利用的热电联产供热系统全工况优化[J].中国电机工程学报，2018,38(16):4815-4822.LI Yan,MI Peiyuan,LI Wentao,et al.Full operating conditions optimization of cogeneration heating system based on waste heat utilization of exhausted steam of large turbine units[J]. Proceedings of the CSEE,2018,38(16):4815-4822.
• [6]杨文正，谭锐，马庆中，等.多级串联乏汽余热回收系统在直接空冷机组中的应用[J].汽轮机技术，2016,58(2):139-142.YANG Wenzheng,TAN Rui,MA Qingzhong,et al.Application of multi-level series exhaust heat recovery system in direct air cooling power plant[J]. Turbine Technology,2016,58(2):139-142.
• [7]Е.Я.索科洛夫，Н.М.津格尔.喷射器[M].黄秋云，译.北京：科学出版社，1977.
• [8]胡伟伟.喷射器制冷系统的分析与设计[D].武汉：华中科技大学，2014.HU Weiwei. Analysis and design of ejector refrigeration system[D].Wuhan:Huazhong University of Science and Technology,2014.
• [9]李岸然.低温多效海水淡化用蒸汽喷射器的优化设计[J].真空科学与技术学报，2015,35(4):412-417.LI Anran. Optimization design of steam ejector for low temperature multi-effect seawater desalination[J].Chinese Journal of Vacuum Science and Technology,2015,35(4):412-417.
• [10]李衍平.火电厂真空系统蒸汽喷射器改造[J].山西电力，2022(1):31-33.LI Yanping. Retrofit of adding steam ejector to vacuum system[J].Shanxi Electric Power,2022(1):31-33.
• [11]刘志强，沈胜强，李素芬.喷射器一维设计理论的研究进展[J].热能动力工程，2001,16(3):229-232.LIU Zhiqiang,SHEN Shengqiang,LI Sufen. Recent advances in the study of one-dimensional ejector design theory[J].Journal of Engineering for Thermal Energy and Power,2001,16(3):229-232.
• [12]沈胜强，宋煜，张琨，等.喷嘴可调式蒸汽喷射器的性能计算[J].热科学与技术，2010,9(1):64-69.SHEN Shengqiang,SONG Yu,ZHANG Kun,et al.Performance calculation of adjustable nozzle steam ejector[J].Journal of Thermal Science and Technology,2010,9(1):64-69.
• [13]黎立新.蒸汽喷射式热泵供热节能方法经济性分析[J].流体机械，1995,23(2):60-62.LI Lixin.Economic analysis of energy-saving methods for steam jet heat pump heating[J].Fluid Machinery,1995,23(2):60-62.
• [14]杨立军，杜小泽，杨勇平.环境风影响下的空冷岛运行特性[J].工程热物理学报，2009,30(2):325-328.YANG Lijun,DU Xiaoze,YANG Yongping.Influences of natural wind upon the operation characteristics of aircooled condenser system[J].Journal of Engineering Thermophysics,2009,30(2):325-328.
• [15]赵晓东.大型直接空冷系统蒸汽流量分配研究及运行策略[D].北京：华北电力大学，2013.ZHAO Xiaodong.Research on exhaust steam distribution of large-scale direct air-cooling system and operating control strategy[D].Beijing:North China Electric Power University,2013.
• [16]肖烈晖.燃煤发电直接空冷系统性能强化及运行优化研究[D].北京：华北电力大学，2018.XIAO Liehui.Study on performance enhancement and operation optimization of direct air cooling system in coalfired power generation unit[D].Beijing:North China Electric Power University,2018.
• [17]曹旭，胡洪华，臧瑞起.直接空冷机组空冷岛优化运行研究[J].热力发电，2011,40(8):5-7.CAO Xu,HU Honghua,ZANG Ruiqi.Study on operation optimization of air-colled island for direct air-cooled units[J].Thermal Power Generation,2011,40(8):5-7.