太阳能柱式吸热器非均匀受热的数值模拟  

Numerical Simulation of the Solar Thermal Cylinder Receiver under Uneven Heat Flux

作　　者：郑建涛[1] 韩临武 徐海卫[1] 刘明义[1] 曹传钊[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：《节能技术》2016年第1期7-12,共6页Energy Conservation Technology

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：塔式太阳能热发电站中的吸热器是光热转换的重要设备,其由多根无间隙排列的集热管组成。通常集热管表面接收的太阳辐射能流极不均匀,当水/蒸汽作为集热管内的传热工质时,管内工质状态为复杂的沸腾两相流动,因此研究其受热特性具有重要价值。本文基于Fluent平台,利用VOF(Volume of Fluid)方法,建立了不均匀能流边界条件下水/蒸汽集热管的数值模型。模拟分析呈现了管内汽液两相的流动特性;得到了集热管管内工质和管壁的温度分布和集热管内壁面的努塞尔数分布。In the solar thermal power tower plant, the receiver is a critically important energy conversion unit to convert solar energy to thermal energy, which is composed of some pipes with no clearance ar- rangement. Generally, the solar radiant flux on the pipe surface is uneven. When the heat transfer fluid is water/vapor, the two- phase flow in the pipe is extremely complex. In conclusion, the understanding of the heat transfer characteristics in the pipe is significant and important. Through the Fluent and the VOF （ Volume of Fluid） , the paper develops the water/vapor pipe numerical model under uneven heat flux boundary. The numerical simulation results show the flow characteristic of the two - phase flow. What＇ s more, the paper obtains the temperature distribution of the fluid and the pipe, as well as the Nu number in the pipe inner surface.

关 键 词：塔式电站 不均匀能流 水/蒸汽工质 VOF 用户自定义函数 

分 类 号：TM615[电气工程—电力系统及自动化]