摘要
对于已投入运行的供汽管网,其凝结水量同时受到供汽流量、供汽压力、供汽温度及环境温度等因素的影响。为探究供汽管网与这些影响因素之间的关系,以某供汽管网为例,借助Gensystem模型开发平台,构建了管网仿真模型,得到了管网凝结水量与其影响因素之间的关系,并分析了各影响因素扰动时凝结水量的动态变化趋势。结果表明:管网在供汽流量8.33 kg/s(30 t/h)、供汽压力1 MPa、供汽温度280℃、环境温度20℃工况下,供汽流量每升高2.78 kg/s(10 t/h),管网凝结水量降低33.3%;供汽压力每升高0.1 MPa,凝结水量增大24.0%;供汽温度每升高10℃,凝结水量降低7.1%;环境温度每升高10℃,凝结水量降低6.8%。管网凝结水量对供汽压力有较大的敏感性,供汽压力升高时,管网凝结水量会在短时间内有一骤增过程,容易出现大量凝结水聚集,造成安全隐患。
For the steam supply pipe network that has been put into operation,the amount of condensed water is affected simultaneously by factors such as steam flow,steam pressure,steam temperature and ambient temperature.To explore the relationship between the steam supply pipe network and these influencing factors,this paper takes a steam supply pipe network as the example,with the help of the Gensystem model development platform,it establishes a pipe network simulation model,and obtains the relationship between the pipe network condensate and its influencing factors.Moreover,it analyzes the dynamic change trend of the condensate volume when the influencing factors are disturbed.The results show that,under the conditions with steam supply flow rate of 8.33 kg/s(30 t/h),steam supply pressure of 1 MPa,steam supply temperature of 280℃and ambient temperature of 20℃,for every 2.78 kg/s(10 t/h)increase of the steam supply flow,the condensate quantity of pipe network decreases by 33.3%.For every 0.1 MPa increase of the steam supply pressure,the condensate quantity of pipe network increases by 24.0%.For every 10℃increase of the steam supply temperature,the condensate quantity of pipe network decreases by 7.1%.For every 10℃increase in the ambient temperature,the condensate quantity of pipe network reduces by 6.8%.The condensate quantity of the pipe network is highly sensitive to the steam supply pressure.When the steam supply pressure increases,the condensate quantity of the pipe network will increase rapidly in a short period of time,and a large amount of condensate is prone to accumulate and cause safety hazards.
作者
高建强
曹浩
危日光
陈志斌
黄志成
GAO Jianqiang;CAO Hao;WEI Riguang;CHEN Zhibin;HUANG Zhicheng(School of Energy Power and Mechanical Engineering,North China Electric Power University,Baoding 071003,China)
出处
《热力发电》
CAS
CSCD
北大核心
2021年第3期70-76,共7页
Thermal Power Generation
基金
国家自然科学基金项目(61973117)。
关键词
供汽管网
凝结水量
仿真模型
影响因素
Gensystem开发平台
steam supply pipeline network
condensate volume
simulation model
influencing factor
Gensystem development platform
