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Atmosphere 2016, 7(1), 2;

Winter Dew Harvest in Mexico City

Departamento de Ingeniería de Procesos e Hidráulica, Universidad Autónoma Metropolitana-Iztapalapa, Av. San Rafael Atlixco 186, col., Vicentina, Cd. de México DF 11000, Mexico
Department of Mechanical Engineering, Centro Nacional de Investigación y Desarrollo Tecnológico, CENIDET-DGEST-SEP, Int. Internado Palmira S/N, Col. Palmira, Cuernavaca, Morelos CP 62490, Mexico
Author to whom correspondence should be addressed.
Academic Editor: Robert W. Talbot
Received: 6 October 2015 / Revised: 8 December 2015 / Accepted: 9 December 2015 / Published: 23 December 2015
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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. View Full-Text
Keywords: dew harvest; dew condensation; modelling dew collection; nocturnal radiative cooling dew harvest; dew condensation; modelling dew collection; nocturnal radiative cooling

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Jorge Ernesto, A.-T.; Jose Jasson, F.-P. Winter Dew Harvest in Mexico City. Atmosphere 2016, 7, 2.

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