硅油光-热老化气升式反应器数值模拟

摘要

为进行液浸聚光光伏系统中液浸液体即二甲基硅油在光热条件下的老化实验研究,设计制作了气升式外环流光催化反应器。采用Fluent软件欧拉多相流模型和RNG k-ε湍流模型对反应器进行了三维全尺寸数值模拟。分析了结构参数、操作参数和硅油物性参数对反应器中气液两相流动的影响,得到反应器内循环液速和气含率等参数的分布。模拟结果与实验结果有较好的一致性。模拟结果表明:硅油黏度越小,循环液速越大,气含率越小;反应器适宜操作气速不应大于0.02 m/s;反应器最适宜高径比和环隙面积比分别为47.6和0.31~0.41。

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	冯加和
	王一平
	黄群武
	张博阳

关键词：聚光光伏；液浸冷却；硅油老化；气升式外环流反应器；数值模拟

Abstract：

An airlift external-loop photocatalytic reactor (AELPR) was developed for high temperature and UV-light aging test of dimethyl silicone oil, which was used as working liquid in liquid-immersed concentrating photovoltaic systems. 3-D numerical simulations of the reactor were carried out by Fluent software with RNG k-ε turbulent model and Euler-Eulerian two-phase model. Effect of reactor structure parameters, operation parameters and physical parameters of silicone oil on the gas-liquid two phase flow has been simulated and analyzed. The detailed distribution of internal circulation liquid velocity and gas holdup were obtained and the reactor structure was optimized as well by the simulation. The numerical simulation results and experimental results are in good agreement. The simulation results show that circulation liquid velocity increases and gas holdup decreases with liquid viscosity decreasing, the suitable superficial gas velocity is less than 0.02 m/s, and the optimum reactor height to diameter ratio and annular area ratio is 47.6 and 0.31-0.41, respectively.

Keywords： concentrating photovoltaic； liquid immersion cooling； silicone oil aging； airlift external-loop reactor； numerical simulation

Received 2014-03-31;

Corresponding Authors: 黄群武,E-mail:huangqw@tju.edu.cn。 Email: huangqw@tju.edu.cn

About author: 冯加和(1988-),男,硕士研究生,主要从事环流反应器的实验研究与数值模拟。

引用本文:

冯加和, 王一平, 黄群武, 张博阳.硅油光-热老化气升式反应器数值模拟[J]. 化学工业与工程, 2016,33(3): 82-88

Feng Jiahe, Wang Yiping, Huang Qunwu, Zhang Boyang.Numerical Simulation of an Airlift Reactor for Silicone Oil Light and Heat Aging[J]. Chemcial Industry and Engineering, 2016,33(3): 82-88

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