塔式太阳能电站集热管非均匀受热特性研究  

Heat transfer performance of water-vapor receiver with uneven heat flux in solar power tower plant

作　　者：曹传钊[1] 韩临武 徐海卫[1] 刘明义[1] 裴杰[1] 

机构地区：[1]中国华能集团清洁能源技术研究院有限公司,北京102209

出　　处：《热力发电》2015年第6期72-76,共5页Thermal Power Generation

基　　金：国家能源应用技术研究及工程示范项目(NY20130101;NY20130102;NY20130103);中国华能集团科技项目(HNKJ13-H21)

摘　　要：塔式太阳能电站吸热器中的集热管是光热转换的核心组件。集热管面向镜场的半圆周受热,且热流密度沿圆周和轴向不断变化,背向镜场的半圆周绝热,同时集热管内水-蒸汽工质的沸腾流动换热尤为复杂,研究其受热特性有助于深入了解塔式电站吸热器集热管的整体性能。为此,建立了轴向和周向不均匀热流边界条件下水-蒸汽集热管内的数值模型。基于Fluent平台,计算三维、非稳态的汽液两相流动,通过模拟分析呈现了管内的汽液两相流动特性,同时揭示了在这种极不均匀热流条件下,集热管的温度分布规律及其传热特性。Heat collector pipe in receiver of solar thermal power tower plants is a kernel unit to convert solar energy into thermal energy.Only the semi-circumference facing the heliostat field receives heat flux,while the other semi-circumference depart from the heliostat field is adiabatic.What＆#39;s more,the heat transfer of boiling flow in the pipe with the water-vapor as the working fluid is especially complex.So the understand-ing of the heat transfer characteristics in it is significant and important.Through Fluent software,numeri-cal model of the water-vapor tube under uneven heat flux boundary with semi-circumference heated and the other semi-circumference adiabatic was established.The three-dimensional and unsteady water-vapor two-phase flow was numerically simulated.So,flow characteristics of the two-phase flow were obtained,and temperature distribution and heat transfer characteristics of the tube under uneven heat flux were revealed.

关 键 词：塔式太阳能电站 集热管 不均匀热流 水-蒸汽 两相流 VOF 模型 

分 类 号：TK514[动力工程及工程热物理—热能工程]