锅炉集箱系统并联管组流量不均匀性与热负荷间的关系  

Relationship Between the Heat Load and the Uneven Distribution Flow of the Manifold in Header System of Boiler

作　　者：钟崴[1] 谢金芳[1] 王志新[2] 童水光[1] 

机构地区：[1]浙江大学,浙江省杭州市310027 [2]太原锅炉集团有限公司,山西省太原市030021

出　　处：《中国电机工程学报》2011年第32期23-30,共8页Proceedings of the CSEE

基　　金："十一五"国家科技支撑计划重大项目(2006BAF01A46-8)~~

摘　　要：锅炉集箱系统设计结构的多样性,使得其中受热并联管组内流体的流动特性也趋于复杂化。确保并联管组内的流体具有良好的流动特性是集箱系统安全运行的保证。通过创建一种集箱系统的水动力特性分析模型,研究热负荷分布不均匀性对并联管组流量分配不均匀性的影响,并对其变化关系式进行了理论推导,同时给出分析实例。分析结果表明:在单相状态或摩擦阻力校正系数可视为常数的汽水两相状态下,集箱系统内各并联管的分配流量与其平均密度间总体上呈二次函数变化关系,且单相水和两相状态下并联管的分配流量随其热负荷的增加而增加,单相蒸汽状态下并联管的分配流量随其热负荷的增加而减小。The flow characteristics of the manifold tended to more complicated since the design structure of header system becoming diversification.To ensure the header system being in safe operation,the manifold need to be having good flow characteristics.The effect from the uneven distribution of heat load to the uneven flow distribution of the manifold and derived the relationship between the heat load and the uneven distribution flow was studied.Meantime,an example was given for verification and analysis.The results show that the distribution flow of the manifold in header system is quadratic with the average density in the single-phase state and in the two-phase state when the friction loss correction factor is constant.The result also shows that the distribution flow of the parallel tubes increases with the increasing of the heat load in the liquid state and in the two-phase state,but decreases with the increasing of the heat load in the steam state.

关 键 词：集箱系统 并联管组 流量 热偏差 流量偏差 

分 类 号：TK224[动力工程及工程热物理—动力机械及工程]