立式太阳能热气流电站系统运行机理研究  

STUDY ON THE OPERATION MECHANISM OF VERTICAL SOLAR CHIMNEY POWER PLANT SYSTEM

作　　者：周艳[1] 王莉[1] 宫园园[1] 路海滨[1] 董浩然[1] 李庆领[1] 

机构地区：[1]青岛科技大学机电工程学院,青岛266061

出　　处：《太阳能学报》2016年第11期2868-2874,共7页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(51176080)

摘　　要：由于立式太阳能热气流电站系统中气流的流动过程温度及压力的耦合作用,气流的密度随电站系统高度的增加而不断变化,利用UDF编程工具对密度与温度和压力的关系式及密度随高度的变化关系式进行编程,并导入Fluent计算软件中,通过数值计算得到太阳能热气流电站系统内的流动传热特性,并将该结果与设置恒空气密度模型的数值计算结果及实验结果进行比较,结果表明:当温压耦合下的数值计算结果与实验值差28%,较设密度为恒定值与实验值差41%,因此采用温压耦合模型,更符合系统实际运行情况。The density of airflow changes with the increasing height of the chimney since the temperature and pressure couple effect during the air flow process of the vertical solar chimney power plant system. A program was imported into FLUENT to describe the changes of parameters in the system, which was programmed by UDF considering the relation between density and temperature and pressure, and changes of density with height. The characteristics of flow and heat transfer were obtained to compare with the simulation results and experimental results of the constant air density model, the results showed that when considering the impact of temperature and pressure on air density with that obtained with the experimental value was 28%, compared with error of 41% before doing simulation. It turned out that the result were more consistent with the experimental data when considering the influence of temperature and pressure on air density. Therefore, it is more in line with the actual operation of the system by using temperature and pressure coupling model.

关 键 词：太阳能 热气流电站 立式集热板 温压耦合 UDF编程 

分 类 号：TK124[动力工程及工程热物理—工程热物理]