Humberto Rodríguez Fuentes

MODELING AND VALIDATION OF A GREENHOUSE CLIMATE MODEL

Abstract In this work it is proposed an extension to the Greenhouse climate model given by (Tap, 2000). The extension considers the effect of humidity in the air temperature as well as some terms related to the use of fogs, shade cloth and fan. The introduced modification is validated using measurements of a greenhouse in north west Mexico. The results show that the proposed model is adequate to simulate the climate behavior of the Greenhouse.

Influence of Air Density Variations in the Climate of a Greenhouse

Abstract Climate control is one of the principal reasons to use a Greenhouse. The control task requires of a dynamic model of the climate variables in the Greenhouse. There are different Greenhouse climate models in the literature, some of them include not only the air temperature, soil temperature but also the effect of the crop, CO2 concentration and humidity (Tap, 2000). In order to improve the existing dynamic climate models an approach to consider non constant air density in the climate model of a Greenhouse is proposed. The effect of variations in the air density, due to humidity, is modeled and included in a version of the climate model of (Tap, 2000). The effect of the proposed modification on the Greenhouse climate variables is shown via simulations. A comparison between the proposed approach and one with constant air density is discussed.