ABSTRACT

This work investigates the effects of water depth on the internal heat transfer coefficients and productivity of a solar distiller with a single slope in the summer season. Three different days were considered with three water depths of 1, 2, and 3 cm in the climatic conditions of Iraq. The results illustrate that the total heat transfer coefficients inside the solar distiller increase as the basin water’s depth decreases. The highest total coefficient of heat transfer was $33.37\mathrm{W}/{\text{mathrmm}}^2.\mathrm{k}$, which was obtained at around 1:00 pm with the minimum depth of basin water (1 cm). Furthermore, at 1-cm water depth, the solar distiller became productive earlier than with the other two depths. The productivity rate ranged from 240% at 9 am to 60% at 11 am. In the afternoon, the production rate was reduced to 18.5% at the end of the day in comparison with the depth of 2 cm and 52% in comparison with the depth of 3 cm. The lowest estimated cost of production for 1 l of distilled water was $0.033, which was achieved at the lowest water depth (1 cm), while $0.041 and $0.05 were obtained with 2 and 3 cm, respectively. Thus, 1 cm was the best depth in this study.

摘要

这项工作研究了水深对夏季单坡太阳能蒸馏器的内部传热系数和生产率的影响。在伊拉克的气候条件下，考虑了三个不同的日子，三个水深分别为 1、2 和 3 厘米。结果表明，太阳能蒸馏器内部的总传热系数随着盆地水深的减小而增加。最高的总传热系数是$33.37\mathrm{宽}/{\text{mathrm}}^2.\mathrm{克}$，这是在下午 1:00 左右以最小的盆地水深度 (1 cm) 获得的。此外，在 1 厘米水深处，太阳能蒸馏器比其他两个深度更早开始生产。生产率从上午 9 点的 240% 到上午 11 点的 60% 不等。下午，与 2 厘米深度相比，当天结束时的生产率降低至 18.5%，与 3 厘米深度相比，生产率降低至 52%。1 升蒸馏水的最低估计生产成本为 0.033 美元，这是在最低水深 (1 厘米) 下实现的，而 2 厘米和 3 厘米分别获得了 0.041 美元和 0.05 美元。因此，1 cm 是本研究中的最佳深度。