Thermal comfort in reduced models of broilers' houses, under different types of roofing materials

Abstract

The research was developed to evaluate the use of different types of roofing materials regularly used in poultry houses. Measurements of thermal comfort were made through the use of techniques such as the Black Globe and Humidity Index (BGHI), the Thermal Heat Load (THL) and Enthalpy (H). Conducted in the State University of Goiás, during the months of April and May, 2011, the experiment was composed of five different treatments: AC - Asbestos cement tiles, BA -Bamboo tiles, BAP - Bamboo tiles painted in white, FB -Vegetable fiber tiles and bitumen, FBP -Vegetable fiber tiles and bitumen painted in white. The experiment consisted in 15 repetitions, which were considered the different days of measurements taken. Throughout the studied period, the time of the day considered the least comfortable was the one observed at 2:00pm, and the coverage of vegetable fiber and bitumen showed the highest value of BGHI (84.1) when compared to other types of coverage, characterizing a situation of lower thermal comfort, and no difference was found for THL and H on treatments in the studied region.

Thermal behavior of alternative materials used as roof and efficiency of the reflective painting on the external face

“…The use of alternative materials in construction has been widely studied with the aim of combining low cost with thermal effectiveness [15][16][17][18][19][20]. Among the roofing studied, we found that those made from vegetable fibers [4] and bamboo have excellent resistance and high durability [21], besides being raw material found in large quantities and with low cost.…”

Determination of thermal comfort zone for early-stage broilers

“…Therefore, the thermal environment, which encompasses temperature, humidity, air speed and radiation, interferes directly with breeding performance, changing food consumption and welfare of animals (PONCIANO et al, 2011;PONCIANO et al, 2012;SANTOS et al, 2014). Accordingly, environment inside the aviary sheds must be controlled so that the birds can be reared within a thermal comfort zone, avoiding negative thermal effects on animal yield (ALMEIDA & PASSINI, 2013;CORDEIRO et al, 2010;ROCHA et al, 2010;CAMPOS et al, 2013).…”

Characterization and treatment of sisal fiber residues for cement-based composite application

“…One of the main materials currently used in green buildings is the biocomposite: a combination of natural fibers (such as wood fibers, coir, hemp, jute, sisal, and flax) with polymer (RAMIRES et al, 2010), bitumen (ALMEIDA & PASSINI, 2013) or cement-based matrices (FARIAS FILHO et al, 2010). Natural fibers are biodegradable, renewable and widely available in Brazil.…”