Abstract

A weather model was evaluated to estimate the hourly time temperatura and relative humidity inside of a zenithal ventilated type green-house, as a function of the weather outside of the greenhouse. The study was carried out during the Winter of 2008-2009, in a comercial greenhouse with tomato production, located at Tlahualilo, Durango, Mexico. The model considered the effect of natural ventilation. The results of the evaluation for two non consecutive days showed a good estimation of the air temperature, and a reasonable good estimation of relative humidity. Some adjustments are still required to improve the quality of the model.ADDITIONAL KEYWORDS: Energy balance, water vapor balance, solar radiation.

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