Avaliação Da Temperatura Do Telhado De Diferentes Materiais De Cobertura Para Construção Do Telhado De Aviários Móveis

Farias, Rosimar; Pereira, Maressa Fideles; Castro, Eloinny Karina Figueira; Costa, Andressa Santana; Sousa, Max Nei Braz; Santos, Natanael Costa dos; Santos, Graciene Conceição dos

doi:10.18542/ragros.v9i2.5094

Cited by 2 publications

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“…However, studies on the use of this technology in agricultural facilities are scarce. Among the evaluations performed for conventional and non-conventional roofing materials, the use of reduced models of rural facilities has been cited in the studies of Souza et al (2018), Castro et al (2017), Farias et al (2017), and Silva et al (2015. Castro et al (2017), Dalcin et al (2016), Pérez et al (2015), Marchezan et al (2014), Neto & Nääs (2014, Rosselle et al (2014), and Melo et al (2013) evaluated the thermal comfort of an environment using the black globe humidity index (BGHI = Tbg + 0.36.Tdp + 41.5, in which Tbg and Tdp denote the black globe and the dew point temperatures (°C), respectively) and the radiation heat load index (RHL =  .…”

Section: Introductionmentioning

confidence: 99%

Environmental Thermal Comfort of a Reduced Model Using Cross-Laminated Timber

et al. 2020

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The challenges for the use of the cross-laminated timber (CLT) system in the Brazilian agricultural market are significant. This study evaluated the thermal performance of fiber cement tiles associated with a CLT non-conventional structure compared to those of ceramic, fiber cement and aluminum roof tiles based on following thermal comfort indexes (i.e., black globe humidity index (BGHI), radiant heat load (RHL) and specific enthalpy) using physical conventional models of reduced-scale rural facilities under summer conditions. The non-conventional CLT model comprised closing walls and a lining that form a self-supporting structure with few air inlets. This model presented reduced thermal comfort indexes compared to the other conventional roofs. Moreover, the CLT model has an average black globe temperature (Tbg) of 32.9 °C, which was lower at all times compared to those of the other roofs. In conclusion, the roof with fiber cement tiles associated with the CLT structure exhibited the best performance in terms of thermal comfort, followed by the ceramic, fiber cement, and aluminum tiles. The study results allow a better understanding of the opportunities for CLT usage.

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Section: Introductionmentioning

confidence: 99%

Environmental Thermal Comfort of a Reduced Model Using Cross-Laminated Timber

et al. 2020

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“…In the semi-extensive system, the birds are raised free in pickets, being exposed to the climatic elements, raising the relevance of shelters that can protect the animals from the adverse effects of the environment. It is important to emphasize that the shelter's efficiency in protecting poultry in particular from solar radiation is linked to the type of material used in its construction, highlighting the cover material, (Farias et al 2017) which, if not efficient, will result in increased thermal gains, contributing to the elevation of the shelter indoor temperature (Michels 2007).…”

Section: Introductionmentioning

confidence: 99%

Thermal environment in mobile shelters with different cover types used for chicken housing at the semi-extensive rearing system

et al. 2020

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In tropical climate countries, animal production faces a huge challenge, being the high solar irradiation levels an important factor that negatively influences the welfare and animal performance. The purpose of this research was to check the environment inside mobile shelters with different kinds of cover materials. This research has been developed at the State University of Goiás, Brazil, being used four different cover materials: DFPC, double-faced plastic canvas; PVC, polyvinyl chloride; VFB, tiles made with vegetable fiber and bitumen; and VFBW, tiles made with vegetable fiber and bitumen being the outer face painted white. Covers were placed up mobile shelters with the following dimensions: 1 m length × 1 m width × 1 m height and cover pitch of 30°. The environment was evaluated through thermal comfort indexes: enthalpy (H), temperature and humidity index (THI), black globe and humidity index (BGHI), mean radiant temperature (MRT) and thermal heat load (THL), and the measurement of thermal environmental variables (temperature of external (EST) and internal (IST) surface of the cover, dry bulb temperature (T db ), black globe temperature (T bg ), relative humidity (RH), and wind speedy (WS)). Data analysis was performed using PROC MIXED of SAS® by analysis of variance (ANOVA), followed by the Tukey test, at 5% of significance level. There was observed beneficial effect of the usage of shading, with a decrease in air temperature and thermal comfort indexes when compared with the unshaded environment. The materials presented different thermal behavior, with better results for PVC and VFBW, that presented lower internal (IST) and external surface temperature (EST), in addition to lower black globe temperature, thermal heat load, and black globe and humidity index. PVC and VFBW were the best types of covers evaluated, with significant decreased thermal comfort indexes.

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Avaliação Da Temperatura Do Telhado De Diferentes Materiais De Cobertura Para Construção Do Telhado De Aviários Móveis

Cited by 2 publications

References 1 publication

Environmental Thermal Comfort of a Reduced Model Using Cross-Laminated Timber

Environmental Thermal Comfort of a Reduced Model Using Cross-Laminated Timber

Thermal environment in mobile shelters with different cover types used for chicken housing at the semi-extensive rearing system

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