作　　者： ; ; ; ; ; ; ; ; (陈春达）;

机构地区： 西安交通大学

出　　处： 《中国电机工程学报》 1996年第4期271-275,共5页

摘　　要： 本文阐述国产６００ＭＷ变压运行直流锅炉采用的φ２８×５．４１ｍｍ四头１２Ｃｒ１ＭｏＶ内螺纹管内壁换热特性的试验研究结果。试验参数范围为：压力Ｐ＝１３～２７ＭＰａ，质量流速Ｇ＝４００～１８００ｋｇ／ｍ２·ｓ，内壁热负荷ｑ＝２００～８００ｋｗ／ｍ２。蒸汽干度ｘ＝０～１．０。通过试验，得出了内螺纹管的壁温度变化规律和内壁换热系数的变化规律。根据试验数据总结出了内螺纹管内壁单相换热的准则方程和双相换热的准则方程，为锅炉的设计和运行提供了可靠的数据。 This paper describes the experimental results on internal surface heat transfer in internally ribbed tubes used in sliding-pressure operation once-through boilers of 600MWthermal POwer plants. The test section of the four head internally ribbed tube was made of 12CrlMoV with a diameter of φ28×5. 41mm. The experimental Parameters were: pressure P = 13. 0￣27.0MPa, internal wall heat flux q=200￣ 800kW/m2, mass velocity G=400￣ 1800kg/(m2 .s),and steam qualityx=0 ￣ 1. 0. Based on the experiments, the wall temperature and internal surface heat transfer coefficient profiles of the ribbed tube are obtained,and a correlation for calculating internal surface heat transfer coefficient in the ribbed tubes is pre sented. The results will be very helpful for the design and operation of water evaparators with internally ribbed tubes in large steam boilers.

关 键 词： 变压运行 直流锅炉 水冷壁 换热特性

领　　域： [动力工程及工程热物理]