中国电机工程学报2018，Vol.38Issue(2)：373-382,10.DOI:10.13334/j.0258-8013.pcsee.171362
超超临界循环流化床锅炉内螺纹管水冷壁流动传热特性试验研究
The Experimental Investigation on Flow and Heat Transfer Characteristics of the Rifled Water Wall Tube of an Ultra-supercritical CFB Boiler
摘要
Abstract
Under the condition of low heat flux and mass flux,an experimental investigation on flow and heat transfer characteristics of an ultra-supercritical circulating fluidized bed (CFB) boiler water wall tube had been conducted.The material of the six-head rifled tube used in the test was 15GrMoG.The diameter and wall thickness was φ35mm x 5.67mm.The range of pressure was from 23MPa to 32MPa,mass flux was from 600kg/(m2·s) to 1200kg/(m2·s),and heat flux was from 200kW/m2 to 510kW/m2.In this paper,the wall temperature distribution obtained in the test had been exhibited.The empirical correlations of heat transfer coefficient and frictional resistance coefficient were derived.Six heat transfer coefficient correlations evaluated against the test data.The mechanism of heat transfer enhancement and heat transfer deterioration were analyzed.The results show that the effects of pressure and heat flux on wall temperature are significant within the region of high enthalpy (enthalpy＞2400kJ/kg).When the mass flux increases,the heat transfer deterioration of the tube will be delayed.The effect of buoyancy is significant when the temperature is less than the pseudo-critical temperature.The effects of the heat flux and pressure on frictional pressure drop are more dominant in the supercritical pressure regions.关键词
超超临界/循环流化床锅炉/内螺纹管/传热特性/阻力特性Key words
ultra-supercritical/circulating fluidized bed (CFB) boiler/rifled tube/heat transfer characteristics/resistance characteristics分类
能源科技引用本文复制引用
王文毓,李耀德,赵云杰,曲默丰,杨冬,凌文..超超临界循环流化床锅炉内螺纹管水冷壁流动传热特性试验研究[J].中国电机工程学报,2018,38(2):373-382,10.基金项目
国家重点研发计划(2016YFB0600201).The National Key Research &Development Program of China (2016YFB0600201). （2016YFB0600201）
