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首页> 外文期刊>International Journal of Heat and Mass Transfer >Experimental study on the combined effects of inclination angle and insert devices on the performance of a flat-plate solar collector
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Experimental study on the combined effects of inclination angle and insert devices on the performance of a flat-plate solar collector

机译：倾斜角和插入装置对平板太阳能集热器性能影响的实验研究

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摘要

We report an experimental study investigating the thermal performance of a flat-plate solar collector using insert devices, over a Reynolds number range 200-8000 and a Prandtl number range 5-8, using water as the working fluid. A variety of conventional and novel insert configurations were considered which include, twisted-tape inserts, wire coil inserts and wire mesh insert. The results clearly indicate the enhancement of the Nusselt number by all insert devices. Comparison of the best inserts from different insert families show that in the laminar flow regime, the mesh insert performed the best whereas, the concentric coils achieved the highest Nusselt number augmentation in the turbulent regime, relative to the smooth pipe with no inserts. From the practical aspects, concentric coils were recommended as the best insert among those tested, which shows an overall Nusselt number enhancement of 110% in the low Reynolds number range and 460% in the high Reynolds number range. The impact of collector inclination of the performance of these insert devices was also investigated. The results show that the channel inclination does not have a significant impact on the Nusselt number enhancement.
机译：我们报告了一项实验研究，该研究使用水作为工作流体，在200-8000的雷诺数范围和5-8的普朗特数范围内，使用插入式装置研究平板太阳能收集器的热性能。考虑了多种传统的和新颖的插入件构造，包括扭曲带插入件，金属丝线圈插入件和金属丝网插入件。结果清楚地表明所有插入设备均增强了Nusselt数。对不同插入件族的最佳插入件的比较表明，在层流方案中，网状插入件表现最佳，而同心盘管在湍流状态下相对于没有插入件的光滑管实现了最高的努塞尔数增加。从实际的角度出发，推荐同心线圈作为测试中的最佳插入件，这表明低雷诺数范围内的总Nusselt值提高110％，高雷诺数范围内的460％。还研究了收集器倾斜度对这些插入设备性能的影响。结果表明，通道倾角对Nusselt数增强没有显着影响。

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