Modeling and numerical simulation of solar chimney power plants
Modeling and numerical simulation of solar chimney power plants
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DOI：
10.1016/j.solener.2011.01.011
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发表时间：
2011-05
期刊：
影响因子：
6.7
通讯作者：
Roozbeh Sangi;Majid Amidpour;Behzad Hosseinizadeh
中科院分区：
文献类型：
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作者：
Roozbeh Sangi;Majid Amidpour;Behzad Hosseinizadeh
太阳能烟囱发电厂是一种简单的太阳能热发电厂，能够在太阳能集热器中将太阳能转化为热能。在第二阶段，产生的热能在烟囱中转化为动能，并最终通过风力涡轮机和发电机的组合转化为电能。本研究的目的是对太阳能烟囱发电厂进行更详细的数值分析。开发了基于纳维-斯托克斯、连续性和能量方程的数学模型来详细描述太阳能烟囱发电厂的机制。在西班牙曼萨纳雷斯对原型的几何形状进行了两种不同的数值模拟。首先，使用迭代技术对控制方程进行数值求解。然后，利用CFD软件FLUENT进行数值模拟，该软件可以用标准k-epsilon湍流模型模拟太阳能烟囱发电厂的二维轴对称模型。将这两个预测与可用的实验数据进行比较，以评估模型的有效性。太阳能收集器中的温度、速度和压力分布针对三种不同的太阳辐射进行了说明。曼萨纳雷斯原型机的实验数据与数值结果之间获得了相当好的定量一致性。
The solar chimney power plant is a simple solar thermal power plant that is capable of converting solar energy into thermal energy in the solar collector. In the second stage, the generated thermal energy is converted into kinetic energy in the chimney and ultimately into electric energy using a combination of a wind turbine and a generator. The purpose of this study is to conduct a more detailed numerical analysis of a solar chimney power plant. A mathematical model based on the Navier–Stokes, continuity and energy equations was developed to describe the solar chimney power plant mechanism in detail. Two different numerical simulations were performed for the geometry of the prototype in Manzanares, Spain. First, the governing equations were solved numerically using an iterative technique. Then, the numerical simulation was performed using the CFD software FLUENT that can simulate a two-dimensional axisymmetric model of a solar chimney power plant with the standard k-epsilon turbulence model. Both the predictions were compared with the available experimental data to assess the validity of the model. The temperature, velocity and pressure distributions in the solar collector are illustrated for three different solar radiations. Reasonably good quantitative agreement was obtained between the experimental data of the Manzanares prototype and both the numerical results.