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首页> 外文期刊>Energy Conversion & Management >Investigation of single and double pass solar air heater with transverse fins and a package wire mesh layer
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Investigation of single and double pass solar air heater with transverse fins and a package wire mesh layer

机译：具有横向鳍片和包装金属丝网层的单程和双程太阳能空气加热器的研究

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摘要

The purpose of this work is to construct and test single-pass and double-pass solar air heaters (SAHs) with four transverse fins. These fins were painted dark black and placed transversely to create four equal-spaced sections. Sixteen steel wire mesh layers were located between these fins as an alternative to an absorber plate; they had a cross-sectional area of 0.18 cm × 0.18 cm and an internal diameter of 0.02-cm. In this project, the thermal efficiency and outlet temperature were studied in a geographic area located in the city of Famagusta, North Cyprus. The experimental results indicate that the thermal efficiency increases as the air flow rate increases for the range of (0.011-0.032) kg/s. The maximum efficiency obtained using the 7.5-cm high collector was 62.50% for the double-pass SAH and 55% for the single-pass SAH at an air flow rate of 0.032 kg/s. Moreover, the thermal efficiency further increases by decreasing the height of the lower air pass of the double-pass SAH. The difference between the inlet temperature and outlet temperature, AT, indicated an inverse relationship with air flow rate: AT increased as the air mass flow rate decreased. The maximum differences (ΔT) observed were 45.30 K for the double-passes SAH and 39.9 K for the single-pass SAH at 0.011 kg/s, which were recorded during the middle of the day with a maximum solar intensity. The results demonstrate a significant improvement in the thermal efficiency and outlet air temperature.
机译：这项工作的目的是构造和测试带有四个横向散热片的单通道和双通道太阳能空气加热器（SAH）。将这些鳍涂成深黑色，并横向放置以形成四个等距的截面。在这些散热片之间放置了十六个钢丝网层，以替代吸收板。它们的横截面积为0.18 cm×0.18 cm，内径为0.02 cm。在该项目中，对位于北塞浦路斯法马古斯塔市的地理区域的热效率和出口温度进行了研究。实验结果表明，在（0.011-0.032）kg / s的范围内，热效率随着空气流量的增加而增加。在空气流量为0.032 kg / s的情况下，使用7.5厘米高的集尘器获得的最大效率对于双通道SAH为62.50％，对于单通道SAH为55％。此外，通过降低双程SAH的下部空气通道的高度，可以进一步提高热效率。入口温度和出口温度AT之间的差异表明与空气流量成反比关系：随着空气质量流量的降低，AT升高。以0.011 kg / s的速度通过双次SAH观察到的最大差异（ΔT）为45.30 K，通过单次SAH观察到的最大差异为39.9 K，这是在一天中的最高太阳强度下记录的。结果表明热效率和出口空气温度有了显着改善。

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