Abstract Solar air heaters (SAHs) are generally used in different applications because of their simple structure, low setup cost, and also their higher energy conversion efficiency. In this study, a v-groove type SAH (VTPSAH) has been developed, manufactured and compared with parallel-pass SAH (PPSAH) and double-pass SAH (DPSAH) under same climatic conditions. In addition to the experimental analysis, CFD simulation of SAHs has been done to investigate heat and flow behavior inside the systems. The experiments have been performed in 0.015 kg/s, 0.013 kg/s and 0.011 kg/s mass flow rates on February and June to evaluate the performance of SAHs at various climatic conditions. According to the obtained results, annual average thermal efficiency for PPSAH, DPSAH and VTPSAH were obtained as 54–60.29%, 61.86–66.95% and 70.91–78.18%. The maximum instantaneous thermal efficiency was achieved in all tests as 90.65% in highest mass flow rate in VTPSAH in February. Exergy efficiency values for VTPSAH, DPSAH and PPSAH were obtained in the range of 14.62–18.95%, 12.28–15.68% and 6.68–9.74%, respectively. Moreover, Enviro-economic costs were found between 4.22 and 7.66 $/year. Also, the highest deviation between numerical and experimental results is 10%.

中文翻译：

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不同风道改造的太阳能空气加热器的能效和环境经济调查

摘要 太阳能空气加热器（SAHs）因其结构简单、安装成本低、能量转换效率高而被广泛应用于不同领域。在本研究中，开发、制造了 V 型槽型 SAH (VTPSAH)，并在相同气候条件下与平行通道 SAH (PPSAH) 和双通道 SAH (DPSAH) 进行了比较。除了实验分析外，还对 SAH 进行了 CFD 模拟，以研究系统内部的热和流动行为。2 月和 6 月以 0.015 kg/s、0.013 kg/s 和 0.011 kg/s 质量流量进行了实验，以评估 SAH 在各种气候条件下的性能。根据获得的结果，PPSAH、DPSAH 和 VTPSAH 的年平均热效率分别为 54-60.29%、61.86-66.95% 和 70.91-78.18%。在 2 月份 VTPSAH 的最高质量流量下，所有测试中均实现了最大瞬时热效率为 90.65%。VTPSAH、DPSAH 和 PPSAH 的火用效率值分别在 14.62-18.95%、12.28-15.68% 和 6.68-9.74% 范围内获得。此外，环境经济成本在 4.22 至 7.66 美元/年之间。此外，数值和实验结果之间的最大偏差为 10%。