平板多孔吸收体太阳能塔系统的数值分析

Q3 Engineering

Journal of Mechanical Engineering Research and Developments Pub Date : 2019-09-11 DOI:10.26480/jmerd.05.2019.216.223

Sarmad A. Abdul Hussein, Mohammed A. Nima

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引用次数: 2

摘要

通过对带和不带多孔吸收板的两种太阳能集热器的性能比较，对太阳能上升气流塔的性能进行了数值研究。在本研究中，使用相同孔隙率(0.9)的铜金属泡沫(10和40)PPI作为吸收板。在(10)和(40)PPI条件下，通过将多孔吸收体与水平线倾斜(2°和6°)，研究了吸收多孔介质对增加升风塔气流的作用，并与水平吸收体平板进行了比较。为了模拟多孔介质内部的物理量，在稳态、对称、三维条件下，采用Darcy模型和具有局部热平衡(LTE)假设的能量数值模型，数值模型由RNG (Re-Normalization Group) k- λ湍流模型和离散坐标(DO)辐射模型方程近似。采用Fluent 18.2版软件进行数值分析，求解控制方程。结果表明，多孔吸收板与水平面倾斜2°和6°，可提高太阳能上升气流塔内的质量流量，倾斜2°时使用40 PPI效果最佳。通过对带和不带多孔吸收板的两种太阳能集热器的性能比较，对太阳能上升气流塔的性能进行了数值研究。在本研究中，使用相同孔隙率(0.9)的铜金属泡沫(10和40)PPI作为吸收板。在(10)和(40)PPI条件下，通过将多孔吸收体与水平线倾斜(2°和6°)，研究了吸收多孔介质对增加升风塔气流的作用，并与水平吸收体平板进行了比较。为了模拟多孔介质内部的物理量，在稳态、对称、三维条件下，采用Darcy模型和具有局部热平衡(LTE)假设的能量数值模型，数值模型由RNG (Re-Normalization Group) k- λ湍流模型和离散坐标(DO)辐射模型方程近似。采用Fluent 18.2版软件进行数值分析，求解控制方程。结果表明，多孔吸收板与水平面倾斜2°和6°，可提高太阳能上升气流塔内的质量流量，倾斜2°时使用40 PPI效果最佳。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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NUMERICAL ANALYSIS OF SOLAR TOWER SYSTEM UTILIZED WITH FLAT PLATE AND POROUS ABSORBER

The performance of solar updraft tower investigates numerically by comparing between two solar collectors with and without porous absorber flat plate. In this study, copper metal foam (10 and 40) PPI at the same porosity (0.9) are used as an absorber plate. The effect of the absorbing porous medium is studied to increase the air flow towards the updraft tower by tilting of the porous absorber at an angle (2° and 6°) from the horizontal line for (10 and 40) PPI and compared with the horizontal absorber flat plate. To simulate the physical quantities inside the porous medium, at steady state, symmetry, three dimensional, Darcy model and energy numerical model with local thermal equilibrium (LTE) assumption are adopted and numerical models is approximated by a RNG (Re-Normalization Group) k- ϵ turbulent model and discrete ordinates (DO) radiation model equations. The numerical study is analyzed by Fluent software package (version 18.2) to solve the governing equations. The results showed that the tilting of a porous absorber plate at an angle (2° and 6°) from the horizontal line lead to increase in the mass flow rate inside the solar updraft tower and the maximum performance is found by using 40 PPI at tilt angle 2°.The performance of solar updraft tower investigates numerically by comparing between two solar collectors with and without porous absorber flat plate. In this study, copper metal foam (10 and 40) PPI at the same porosity (0.9) are used as an absorber plate. The effect of the absorbing porous medium is studied to increase the air flow towards the updraft tower by tilting of the porous absorber at an angle (2° and 6°) from the horizontal line for (10 and 40) PPI and compared with the horizontal absorber flat plate. To simulate the physical quantities inside the porous medium, at steady state, symmetry, three dimensional, Darcy model and energy numerical model with local thermal equilibrium (LTE) assumption are adopted and numerical models is approximated by a RNG (Re-Normalization Group) k- ϵ turbulent model and discrete ordinates (DO) radiation model equations. The numerical study is analyzed by Fluent software package (version 18.2) to solve the governing equations. The results showed that the tilting of a porous absorber plate at an angle (2° and 6°) from the horizontal line lead to increase in the mass flow rate inside the solar updraft tower and the maximum performance is found by using 40 PPI at tilt angle 2°.

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来源期刊

Journal of Mechanical Engineering Research and Developments Engineering-Computational Mechanics

自引率

0.00%

发文量

审稿时长

9 weeks

期刊介绍： The scopes of the journal include, but are not limited to, the following topics: • Thermal Engineering and Fluids Engineering • Mechanics • Kinematics, Dynamics, & Control of Mechanical Systems • Mechatronics, Robotics and Automation • Design, Manufacturing, & Product Development • Human and Machine Haptics Specific topics of interest include: Advanced Manufacturing Technology, Analysis and Decision of Industry & Manufacturing System, Applied Mechanics, Biomechanics, CAD/CAM Integration Technology, Complex Curve Design, Manufacturing & Application, Computational Mechanics, Computer-aided Geometric Design & Simulation, Fluid Dynamics, Fluid Mechanics, General mechanics, Geomechanics, Industrial Application of CAD, Machinery and Machine Design, Machine Vision and Learning, Material Science and Processing, Mechanical Power Engineering, Mechatronics and Robotics, Artificial Intelligence, PC Guided Design and Manufacture, Precision Manufacturing & Measurement, Precision Mechanics, Production Technology, Quality & Reliability Engineering, Renewable Energy Technologies, Science and Engineering Computing, Solid Mechanics, Structural Dynamics, System Dynamics and Simulation, Systems Science and Systems Engineering, Vehicle Dynamic Performance Simulation, Virtual-tech Based System & Process-simulation, etc.