热力发电Issue(2)：52-57,6.DOI:10.3969/j.issn.1002﹣3364.2015.02.052
超临界环形炉膛锅炉低质量流速内螺纹管传热特性
Experimental investigation on heat transfer characteristics of low mass﹣flux rifled tube for supercritical pressure boiler with annular furnace
摘要
Abstract
In the range of pressure from 24 MPa to 32 MPa,mass flow rate from 420 kg/(m2 •s)to 800 kg/(m2 •s), and heat flux at outer wall from 150 kW/m2 to 360 kW/m2 ,experiments were conducted to investigate the heat transfer characteristics of water in a vertical upward rifled tube.The temperature distribution in the tube wall was obtained.The effects of heat flux at outer wall,mass flux and pressure on heat transfer coef﹣ficient and temperature at inner wall were analyzed,and the corresponding empirical correlations were pres﹣ented.The experimental results show that at subcritical pressures,the wall temperature increases monoton﹣ically with the bulk fluid enthalpy.The wall temperature rises slowly in the pseudo﹣critical enthalpy re﹣gion,which implies that the heat transfer is enhanced.With the increase of outer wall heat flux and pres﹣sure and with the decrease of mass flux,the wall temperature rises.Meanwhile,the heat transfer coefficient goes down.关键词
超临界/CFB 锅炉/环形炉膛/内螺纹管/壁温/低质量流速/传热特性Key words
supercritical/CFB boiler/annular furnace/rifled tube/wall temperature/low mass flux/heat transfer characteristics分类
能源科技引用本文复制引用
沈植,姜勇,王少飞,谢贝贝,沈艳荣,杨冬..超临界环形炉膛锅炉低质量流速内螺纹管传热特性[J].热力发电,2015,(2):52-57,6.基金项目
中国科学院战略性先导科技专项项目(XDA07030100) （XDA07030100）
