化工学报2016，Vol.67Issue(z2)：120-127,8.DOI:10.11949/j.issn.0438-1157.20161357
超临界 CO2在水平螺旋管内的冷却换热特性
Heat transfer characteristics of supercritical CO2 cooled in horizontal helically coiled tube
摘要
Abstract
The convection heat transfer characteristics of supercritical CO 2 cooled in horizontal helically coiled tube is studied experimentally and numerically.The effects of mass flux,heat flux and pressure on heat transfer for helically coiled tube are analyzed.The comparisons of the heat transfer coefficients are made between the straight tube and the helically coiled tube.And,the heating and cooling conditions for the helically coiled tube are compared.Results show that the heat transfer coefficient is lager in helically coiled tube than straight tube under the same condition.With the decrease of the mass flux and the increase of pressure,the heat transfer enhancement of the helically coiled tube is improved compared to the straight tube.For a given heat flux,the heat transfer coefficients are larger at cooling conditions than that at heating conditions in helically coiled tube.Furthermore,the heat transfer coefficients at heating conditions experience drastically oscillation due to the buoyancy force.关键词
超临界 CO 2/数值模拟/实验研究/水平螺旋管/换热Key words
supercritical CO 2/numerical study/experimental study/horizontal helically coiled tube/heat transfer分类
能源科技引用本文复制引用
刘新新,叶建,徐肖肖,刘朝,王开正,李洪瑞,白万金..超临界 CO2在水平螺旋管内的冷却换热特性[J].化工学报,2016,67(z2):120-127,8.基金项目
国家自然科学基金项目(51206197,51206198)。@@@@supported by the National Natural Science Foundation of China (51206197,51206198) （51206197,51206198）
