Simulation of the internal environment of a post-harvest installation and a solar dryer of coffee

Abstract

A B S T R A C TThis study aimed to make a simulation of the internal environment of an installations for coffee post-harvest and a parabolic solar dryer, specifically analyzing the effect of natural ventilation on the temperature and relative humidity inside these buildings. The ventilated coffee-processing plant and the solar dryer with the largest natural ventilation area showed the best results to preserve the quality of coffee grain.Simulação do ambiente interno de instalação de beneficiamento e secador solar de café R E S U M O Este trabalho propôs, como objetivo, fazer a simulação do ambiente interno de uma instalação de beneficiamento de café e de um secador solar parabólico analisando especificamente o efeito da ventilação natural sobre a temperatura e a umidade relativa do ar no interior dessas construções. A instalação de beneficiamento de café ventilada e o secador solar com a maior área de ventilação natural apresentaram os melhores resultados para conservar a qualidade do grão de café. Key words:ambience bioclimatic coffee quality wet processing of the coffee bean Palavras-chave: ambiência bioclimática qualidade de café beneficiamento úmido de café

Thermal comfort in buildings for wet processing of coffee

“…or a mechanical process, then it is washed and a hydraulic classification is carried out to finalize with grain drying (Osorio et al, 2016;Osorio et al, 2019), which can be solar or mechanical; 70 % of the coffee produced in Colombia is mechanically dried (Gonzalez et al, 2010).…”

“…According to different studies, facilities of this type have dryers located in the same buildings where wet processes are performed, characterized by being closed, with some openings for ventilation (Osorio et al, 2015;Osorio et al, 2016).…”

“…In buildings for wet coffee processing in Colombia, with drying machines inside (Ciro Velásquez et al, 2011), heat and vapor emissions are generated, which can heat and moist said facilities when they cannot be transmitted to the outside (Osorio et al, 2016); this may jeopardize the workers' health and their productivity, as well as coffee quality (Oliveros et al, 2013). These unfavorable environmental conditions, combined with heavy physical work, such as those developed in these buildings, can produce thermal stress, resulting in the weakened general state of health, changes in psychosensory reactions, and fall in production (Lamberts et al, 2008).…”

Thermo-Environmental Performance of Four Different Shapes of Solar Greenhouse Dryer with Free Convection Operating Principle and No Load on Product

“…Thermo-physical and optical properties of materials in the computational domain. Taken from Osorio H et al[38].…”

Structural static and modal frequency simulations in a coffee harvester’s chassis

“…He et al (2010), Petracconi et al (2010), Yildiz & Duzgun (2010), Castillo & Cruchaga (2012), Magalhães et al (2012) and Figueiredo et al (2016) presented several applications of the technique with experimental results. Important results were obtained in agricultural engineering using structural simulations, such as in Magalhães et al (2006), Celik et al (2011), Nilnont et al (2012, Li et al (2013), Oliveira et al (2014), Silva et al (2014) and Hernandez et al (2016), and also in studies on vibration conducted by Pinho et al (2014) and Almeida et al (2015).…”