结构形状对太阳能烟囱集热系统集热特性影响分析  

The influence of structure shape on the heat collection characteristics of solar chimney heat collection system

作　　者：聂晶[1,2] 贾靖 闫素英 王静文[1] 苏昊 NIE Jing;JIA Jing;YAN Suying;WANG Jingwen;SU Hao(School of Energy and Power Engineering,Inner Mongolia University of Technology,Hohhot 010051,China;Key Laboratory of Inner Mongolia Renewable Energy,Hohhot 010051,China)

机构地区：[1]内蒙古工业大学能源与动力工程学院,呼和浩特010051 [2]内蒙古可再生能源重点实验室,呼和浩特010051

出　　处：《内蒙古工业大学学报（自然科学版）》2022年第5期429-435,共7页Journal of Inner Mongolia University of Technology：Natural Science Edition

基　　金：内蒙古工业大学博士基金项目(BS201933);内蒙古自然科学基金项目(2021LHMS05007);内蒙古自治区直属高校基本科研业务费项目(JY20220397)。

摘　　要：通过对太阳能烟囱集热系统(SCPP)相同集热棚面积、不同集热棚倾角、不同集热棚形状进行数值模拟对比研究,比较集热系统内温度场、速度场以及压力场分布情况,将10°圆形SCPP的数值模拟结果与实验进行对比验证。结果表明:当集热棚入口高度和集热棚面积一定时,圆形蓄热层对称中心处的表面温度较方形蓄热层对称中心表面温度下降快;增加集热棚倾角角度和改变集热棚形状,集热棚下方空气流动空间增大,换热量增大,烟囱入口处由于过流断面减小,空气流速增大,有利于推动叶轮做功;10°方形集热系统烟囱入口处空气流速较圆形集热系统烟囱入口处空气流速大;集热系统温度数值模拟结果与实验测试结果相比误差为3.1%。得出SCPP采用10°方形太阳能烟囱集热系统集热特性较相同集热棚面积和倾角条件下圆形太阳能烟囱集热系统有更好的集热特性。Through the numerical simulation of solar chimney power plant(SCPP)in the same collector shed area,different collector slope and different collector shape,the temperature field,velocity field and pressure field in the heat collector system were compared,and the numerical simulation results were verified with the experiment.The results show that the surface temperature at the symmetrical center of the circular heat storage layer decreases faster than that of the square heat storage layer when the entrance height and area are constant.Increasing the slope and changing the shape of the collector can increase the air flow space under the heat collecting shed,the heat transfer and the velocity of the chimney entrance.By comparing four of SCPP,it is concluded that the 10°square collector has a higher flow rate at the entrance of the chimney.The error of numerical simulation and experimental test results is 3.1%,and it is concluded that SCPP can improve its overall performance by using a square collector with a collector slope of 10°.

关 键 词：太阳能烟囱 集热棚形状 集热棚倾角 温度 

分 类 号：TK513.5[动力工程及工程热物理—热能工程]