This study presents experimental and theoretical results of winter dew harvest in México City in terms of condensation rate. A simplified theoretical model based on a steady-state energy balance on a radiator-condenser was fitted, as a function of the ambient temperature, the relative humidity and the wind velocity. A glass sheet and aluminum sheet white-painted were used as samples over the outdoor experiments. A good correlation was obtained between the theoretical and experimental data. The experimental results show that there was condensation in 68% of the winter nights on both condensers. The total winter condensed mass was 2977 g/m2 and 2888 g/m2 on the glass sheet and aluminum sheet white-painted, respectively. Thus, the condensed mass on the glass was only 3% higher than that on the painted surface. The maximum nightly dew harvests occurred during December, which linearly reduced from 50 g/m2 night to 22 g/m2 night as the winter months went by. The condensation occurred from 1:00 a.m. to 9:00 a.m., with maximum condensation rates between 6:00 a.m. and 7:00 a.m. The dew harvest can provide a partial alternative to the winter water shortage in certain locations with similar climates to the winter in Mexico City, as long as pollution is not significant.
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机译:这项研究从凝结率方面介绍了墨西哥城冬季露水收获的实验和理论结果。根据环境温度,相对湿度和风速,建立了基于散热器-冷凝器上稳态能量平衡的简化理论模型。在户外实验中,将玻璃板和粉刷成白色的铝板用作样品。在理论和实验数据之间获得了良好的相关性。实验结果表明,两个冷凝器中68%的冬夜都有冷凝。在粉刷成白色的玻璃板上和铝板上,冬季的总冷凝质量分别为2977 g / m 2 sup>和2888 g / m 2 sup>。因此,玻璃上的冷凝质量仅比喷漆表面高3%。冬季最大的夜间露水收获发生在12月,从冬季的50 g / m 2 sup>线性下降到22 g / m 2 sup>。凝结发生在1:00 am至9:00 am,最大凝结速率在6:00 am至7:00 am之间。在某些气候与冬季相似的地区,露水收成可以部分替代冬季缺水。在墨西哥城,只要污染不大。
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