Sensitivity analysis on the effect of key parameters on the performance of parabolic trough solar collectors
Sensitivity analysis on the effect of key parameters on the performance of parabolic trough solar collectors
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DOI：
10.1088/1742-6596/501/1/012032
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发表时间：
2014-04
期刊：
影响因子：
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通讯作者：
Luis S W Muhlen;Behzad Najafi;F. Rinaldi;R. Marchesi
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文献类型：
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作者：
Luis S W Muhlen;Behzad Najafi;F. Rinaldi;R. Marchesi
太阳能槽是收集太阳能最常用的技术之一，欢迎任何提高这些系统性能的尝试。本文采用一维有限元模型对抛物面太阳槽进行了数值模拟，计算了各单元中流体、吸热体和围护结构的能量平衡。然后利用已有的实验数据对所建立的模型进行了验证。为了研究改变工质类型和相应的雷诺数对系统整体性能的影响，下一步进行了灵敏度分析。还研究了在环空上半部增加屏蔽层和提高换热流体的对流系数所带来的潜在改善。
Solar troughs are amongst the most commonly used technologies for collecting solar thermal energy and any attempt to increase the performance of these systems is welcomed. In the present study a parabolic solar trough is simulated using a one dimensional finite element model in which the energy balances for the fluid, the absorber and the envelope in each element are performed. The developed model is then validated using the available experimental data . A sensitivity analysis is performed in the next step in order to study the effect of changing the type of the working fluid and the corresponding Reynolds number on the overall performance of the system. The potential improvement due to the addition of a shield on the upper half of the annulus and enhancing the convection coefficient of the heat transfer fluid is also studied.