Open Access

ARTICLE

Numerical Study of the Distribution of Temperatures and Relative Humidity in a Ventilated Room Located in Warm Weather

J. Serrano-Arellano¹, J. M. Belman-Flores^2,*, I. Hernández-Pérez³, K. M. Aguilar-Castro³, E. V. Macías-Melo³, F. Elizalde-Blancas², J. M. Riesco-Ávila², F. J. García-Rodríguez⁴

1 Instituto Tecnológico Superior de Huichapan, El Saucillo, Huichapan, 42411, México.
2 Universidad de Guanajuato, Palo Blanco, Salamanca, 36885, México.
3 Universidad Juárez Autónoma de Tabasco, Cunduacán, Tabasco, 86690, México.
4 Instituto Tecnológico de Celaya, Col. Fovissste, Celaya, 38010, México.

* Corresponding Author: J. M. Belman-Flores. Email: .

Computer Modeling in Engineering & Sciences 2020, 123(2), 571-602. https://doi.org/10.32604/cmes.2020.08677

Received 25 September 2019; Accepted 24 February 2020; Issue published 01 May 2020

Abstract

In the present study, an analysis of the heat and mass transfer in a ventilated cavity in a warm climate zone was carried out to analyze, among others, the temperatures and percentage of relative humidity (RH). The governing equations of the mathematical model were solved through the finite volume method. We used the k-ε turbulence mode to find the results of the variables of interest in seven climate records on a given day. The velocity of the inlet flow of the air-H₂O mixture was varied through the Reynolds number (Re) from 500 to 10000. The outdoor weather conditions considered were solar radiation, ambient temperature, and RH. It was found that at low velocities, flow recirculation was formed inside the cavity which increased the temperature and concentration of RH. For Re=5000 the flow is predominantly forced, which tends to set the values of temperature and RH as 20°C and 20% respectively. The values of the RH increase in the afternoon hours when the solar radiation decreases to the value of zero. However, the mass transfer through the values of Sh is maintained with similar values in the seven weather records. It was concluded that when air conditioning supplies air at speeds higher than 0.26 m/s at low temperatures it produces cooling with low RH, this causes discomfort, illness and/or discomfort to the users.

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