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Title: Comparative analysis of the cooling efficiency in tropical climate of three alternative materials for evaporative cooling pads
Keywords: Cooling pad
Evaporative cooling
Alternative materials
Cooling efficiency
Temperature–humidity index
Resfriamento evaporativo
Materiais alternativos
Índice de temperatura e umidade
Issue Date: Dec-2021
Publisher: Multidisciplinary Digital Publishing Institute (MDPI)
Citation: OBANDO VEGA, F. A. et al. Comparative analysis of the cooling efficiency in tropical climate of three alternative materials for evaporative cooling pads. Applied Sciences, Basel, v. 12, n. 1, 2022. DOI: 10.3390/app12010077.
Abstract: A comparison between commercial cellulose evaporative cooling pad and pads manufactured with three alternative materials was made for environmental conditions typical of tropical countries. Wind tunnel tests were carried out to compute the convective heat and mass transfer coefficients and to measure the pressure drop across each pad, obtaining expressions that can be used as reference for future simulations. Using a mathematical model, a detailed analysis of the efficiency, Temperature–Humidity Index, temperature drop and relative humidity through the pads was performed in terms of different operative and constructive conditions, such as air velocities, dry-bulb temperatures, relative humidity and pad thickness. Significant differences between the pressure drop across the pads were found, which increases with the inlet air velocity and water flow. A weak relation between the analysed variables and the inlet air velocity was found, while a high correlation between the analysed variables, pad thickness and the external environmental conditions was established. Cooling efficiencies above 40% and a Temperature–Humidity Index below the mild zone of thermal stress were obtained for the alternative panels. Although the cellulose cooling pad showed the best behaviour in all aspects, the alternative pads can be used as substituted in specific applications to reduce the Temperature–Humidity Index inside agricultural facilities.
Appears in Collections:DEG - Artigos publicados em periódicos

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