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Gravity & wind load analysis and optical study of solar parabolic trough collector with composite facets using optimized modelling approach

机译：使用优化建模方法与复合套头太阳抛抛槽收集器的重力和风力荷载分析与光学研究

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摘要

In the present work, structural and optical analysis of 23.08 m~2 (A_(aperture)) solar parabolic trough has been done utilizing different composite materials with an optimized modelling approach. The linear parabolic trough collector is subjected to gravity and wind loads and thereby it undergoes surface deformations. Various trough materials are structurally analysed and a hybrid composite is designed. The RMS values of local slope deviations of trough termed as SD value is calculated using Modified Element Approach to observe the behaviour of trough at various tracking positions varying from 0° to 90° orientations. The cases been discussed are trough-alone (stiff) case and full collector (elastic) case under gravity and wind loading conditions with wind speed of 15 m/s. Trough parameters like fibre orientation of laminae, stacking sequence and direction and size of reinforcement conduits are optimized to minimize SD values. Furthermore, the setup is optically studied and the slope deviations are compared for individual models through intercept factors (γ). The comparative study reveals that the solar parabolic trough collector with its facets made of woven jute/glass fibre-reinforced polyester hybrid composite material yields γ_(max) = 0.957 for avg. SD = 1.34 mrad in stiff case and γ_(1max) = 0.955 for avg. SD = 1.349 mrad in elastic case under gravity load, and γ_(max) = 0.866 for avg. SD = 3.78 mrad in stiff case and γ_(max) = 0.863 for avg. SD = 3.81 mrad in elastic case under both wind and gravity loads, resulting to be the best among considered models. Maximum weight reduction of up to 30% in stiff case and up to 4.5% in elastic case has also been observed compared to conventional glass collector for hybrid composite model thus reducing the tracking power and producing a cost effective system.
机译：在本作工作中，使用不同的复合材料具有优化的建模方法，实现了23.08m〜2（A_（孔径））太阳抛抛光槽的结构和光学分析。线性抛物线槽收集器受到重力和风荷载，从而经历表面变形。结构分析各种槽材料，并设计了混合复合材料。使用修改的元件方法计算作为SD值所谓的槽的局部斜率偏差的RMS值，以观察从0°到90°取向的各种跟踪位置处的槽的行为。讨论的情况是单独的（刚性）壳体和全收集器（弹性）壳体，在重力和风速负载条件下，风速为15米/秒。低谷参数，如薄纤维取向，堆叠序列和钢筋管道的方向和方向和尺寸经过优化，以最小化SD值。此外，光学研究了设置，并通过截距因子（γ）对单个模型进行比较斜率偏差。比较研究表明，太阳能抛物线槽收集器具有由其织造黄麻/玻璃纤维增​​强聚酯杂化材料制成的刻面产生γ_（最大值）= 0.957的AVG。 SD = 1.34 MRAD刚刚静电和γ_（1MAX）= 0.955的AVG。 SD = 1.349 MRAD在重力负载下的弹性盒中，AVG的γ_（最大值）= 0.866。 SD = 3.78 MRAD刚刚的壳体和γ_（max）= 0.863的AVG。 SD = 3.81 MRAD在风和重力负载下的弹性盒中，导致在考虑模型中是最好的。与传统的玻璃收集器相比，在混合复合模型的常规玻璃收集器相比，在弹性壳体中最大减少高达30％，并且在用于混合复合模型的传统玻璃收集器中，因此减少了跟踪功率并产生了成本效益的系统。

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  • 来源
    《Energy》 |2019年第2期|116065.1-116065.41|共41页
  • 作者

    K. S. Reddy; Hitesh Singla; Natraj;

  • 作者单位

    Heat Transfer and Thermal Power Laboratory Department of Mechanical Engineering Indian Institute of Technology Madras Chennai 600036 India;

    Heat Transfer and Thermal Power Laboratory Department of Mechanical Engineering Indian Institute of Technology Madras Chennai 600036 India;

    Heat Transfer and Thermal Power Laboratory Department of Mechanical Engineering Indian Institute of Technology Madras Chennai 600036 India;

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  • 正文语种 eng
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  • 关键词

    solar energy; Parabolic trough collector; Composite materials; Gravity and wind loads;

    机译：太阳能;抛物线槽收集器;复合材料;重力和风量;

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