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首页> 外文期刊>Energy >Computational study on the effect of collector cover inclination angle, absorber plate diameter and chimney height on flow and performance parameters of solar updraft tower (SUT) plant
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Computational study on the effect of collector cover inclination angle, absorber plate diameter and chimney height on flow and performance parameters of solar updraft tower (SUT) plant

机译：集电器覆盖倾角，吸收板直径和烟囱高度对太阳上升塔（SUT）植物流量和性能参数影响的计算研究

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摘要

A computational model is developed to investigate the influence of geometrical configurations such as chimney height (H-ch), absorber plate diameter (D-ap) and collector plate angle (theta(cr))on flow and performance characteristics of solar updraft tower (SUT) plant. The diameter of the chimney (D-ch) and air entrance gap (e) selected for numerical simulations are 0.6 m and 0.1 m, respectively. Parametric study is carried out by varying Hch of 3-8 m, theta(cr) of 20 degrees-35 degrees with an increment of 5 degrees and D-ap of 3.5-12 m. A turbulent model (RNG k-epsilon) is incorporated for considering turbulence effect and Discrete ordinates (DO) model incorporated for estimation of radiation heat transfer inside the setup. It is found that a slight decrease of temperature and increase of air velocity when theta(cr) is increased. It is noticed that air velocity is enhanced (up to 44%) while the H-ch is increased from 3 to 8 m. Power output, overall, chimney and exergy efficiencies are estimated. Correlations are developed to estimate the performance parameters in terms of geometrical configurations. From the parametric study, it is concluded that for the D-ch and e of 0.6 m and 0.1 m, respectively, better performance can be achieved at a Hch of 7 m, theta(cr) of 30 degrees and D-ap of 5 m. (C) 2019 Elsevier Ltd. All rights reserved.
机译：开发了计算模型以研究几何配置的影响，例如烟囱高度（H-CH），吸收板直径（D-AP）和集电极板角度（THETA（CR））对太阳上升塔的流量和性能特性（ SUT）植物。用于数值模拟的烟囱（D-CH）和空气入口间隙（e）的直径分别为0.6米和0.1米。参数研究通过改变3-8米，θ（Cr）的20度-35度的Hch进行，增量为5度，D-AP为3.5-12米。湍流模型（RNG K-EPSILON）被用来考虑湍流效应和分立坐标（DO）模型，以用于估计设置内部的辐射热传递。发现当Theta（Cr）增加时，略微降低温度和空气速度的增加。注意到，增强空气速度（高达44％），而H-Ch增加到3至8米。估计功率输出，总体，烟囱和漏洞效率。开发相关性以在几何配置方面估计性能参数。从参数研究中，得出结论，对于D-CH和E分别为0.6米和0.1米，可以在30度和D-AP的7米，Theta（Cr）的Hch处实现更好的性能m。 （c）2019 Elsevier Ltd.保留所有权利。

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