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Second Thermal and Fluids Engineering  Conference

ISSN: 2379-1748
ISBN: 978-1-56700-430-4

OPTIMAL VENTILATION FOR AN ADEQUATE THERMAL ENVIRONMENT FOR GREENHOUSE AMARANTH GERMINATION

J. Serrano-Arellano
Division de Arquitectura, Instituto Tecnologico Superior de Huichapan, ITESHU-TecNM-SEP. Dom. Conocido S/N, El Saucillo, Huichapan, Hgo., C.P. 42411, Mexico

M. Gijon-Rivera
Tecnologico de Monterrey, Escuela de Ingenieria y Ciencias, Via Atlixcáyotl 2301, Reserva Territorial Atlixcayotl, Puebla, Puebla, C.P. 72453, Mexico

J. L. Chavez-Servin
Facultad de Ciencias Naturales, Campus Juriquilla, Universidad Autonoma de Queretaro. Av. de las Ciencias S/N, Juriquilla, Queretaro, Qro. CP 76320, Mexico

Abstract

A numerical study was undertaken to determine the optimal ventilation for achieving an adequate thermal environment inside a greenhouse for growing amaranth. The greenhouse is in Amazcala Qro., Mexico. The study was conducted with real dimensions in a turbulent flow regime. The airflow provided to the greenhouse varied in a Reynolds number range of 0 ≤ Re ≤ 5 × 104. Three cases were studied, varying the location of the airflow exit opening on the left vertical wall in accordance with the following: Case A, the airflow exit opening in the upper position; Case B, in the middle position; and Case C, in the lower position. The right wall was considered as a polycarbonate wall, which is heated by the degree of sunlight received. We found that the case with the airflow exit opening nearest to the upper wall (Case A) was optimal for dissipating excessive heat inside the greenhouse at a Reynolds number range of 5 × 103Re ≤ 2 × 104. Case A showed the highest homogeneity index in temperature distribution within the greenhouse. The remaining cases showed the highest homogeneity in temperature distribution in natural convection but with temperatures at 35°C.

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