Desempenho de telhas de escória de alto forno e fibras vegetais em protótipos de galpões

Conceição, Maristela Neves da; Alves, Sulivan Pereira; Telatin, Aurélio; Silva, Iran José Oliveira da; Piedade, Sônia Maria de Stéfano; Júnior, Holmer Savastano; Tonoli, Gustavo Henrique Denzin

doi:10.1590/s1415-43662008000500015

Cited by 13 publications

(15 citation statements)

References 4 publications

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“…FURTADO et al (2003) analyzed, in the wild of the State of Paraiba, the thermal comfort of poultry sheds with different packaging systems and found at 14h values for RHL of 505.31 Wm -2 for the ceramic roof without artificial ventilation, values higher than those observed in this study. Similarly, the study done by ROSA (1984) In contrast CONCEIÇÃO et al (2008) compared conventional and other roofs, in poultry sheds prototypes for summer conditions, and found the following average values for asbestos cement roofs painted with reflective paint and ceramic roofs, respectively: THI (71.9 and 72.3), BGHI (71.9 and 73.7), RHL (449.17 W m -2 and 477.74 W m -2 ), these values are close to those found in this study.…”

Section: Resultsmentioning

confidence: 86%

Environment in poultry production covered with thermal and aluminum roofing tiles

2015

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ABSTRACT:Brazil is a country of tropical climate, a fact that hinders the poultry production in the aspect of thermal comfort. Thus, we aimed to evaluate the thermal environment in commercial poultry houses with different covers during the months of December 2012 to May 2013, in the municipality of Rio Verde, Goiás. The experimental design was completely randomized in split plots with factorial arrangement of treatments 2x3, being two shed models (thermal and aluminum roof tiles) and three sections within each shed (initial, central and final) for 182 days, having the days as replicates. The thermal environment was assessed through thermal comfort indices: Temperature and Humidity Index, Black Globe Temperature and Humidity Index, Radiant Heat Load and Enthalpy. The data was analyzed by SISVAR 5.1., through the analysis of variance, the Scott Knott test used to compare the means, considering a significance level of 1%. The results showed a significant statistical difference between the sheds and the points assessed (P < 0.05). The thermal shed had the lowest values for the environmental variables (Dbt and Bgt) and thermal indices studied, but larger values for the RH compared to the shed with aluminum covering. The use of thermal covers minimizes the difference in temperature range throughout various times of the day, being at 14:00 o'clock the prominence time to others.

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Section: Resultsmentioning

confidence: 86%

Environment in poultry production covered with thermal and aluminum roofing tiles

2015

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“…Observa-se, na Figura 5A, a variação diária da temperatura de bulbo seco (°C) para o dia de maior entalpia (20 de fevereiro de 2012), que apresentou média de 62,75 kJ kg -1 ar seco, indicando que, em seus respectivos abrigos, todos os animais abrigos estiveram dentro da ZCT das 21 às 6 h e fora deste intervalo se utilizaram de seus mecanismos termorregulatórios a fim de manter a homeotermia. Este valor foi inferior ao encontrado por Conceição et al (2008) que verificaram valor médio da ordem de 70,23 kJ kg -1 ar seco, em estudo utilizando cobertura de telhas convencionais e composta à base de fibra vegetal. A partir das 8 h a temperatura no interior dos abrigos ultrapassou até 6,9 e 5,3 °C a temperatura TCS, para coberturas de telhas de fibrocimento e recicladas, respectivamente.…”

Section: Resultsunclassified

Conforto térmico e desempenho de bezerras Girolando alojadas em abrigos individuais com diferentes coberturas

Barnabé

Pandorfi

Almeida

et al. 2015

Rev. bras. eng. agríc. ambient.

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Esta pesquisa foi desenvolvida com o objetivo de caracterizar os efeitos do ambiente térmico nos índices de conforto, respostas fisiológicas e no desempenho de bezerras Girolando, alojadas em abrigos individuais cobertos com diferentes materiais. O experimento foi realizado entre janeiro e março de 2012, com duração de 56 dias, conduzido com 24 bezerras de composição genética 7/8 Holandês-Gir aos 15 dias de vida e com peso médio de 40,6 kg. Os tratamentos consistiram em três tipos de cobertura, palha de palmeira, telha de polímero reciclado e telha de fibrocimento, com 8 repetições. O delineamento experimental adotado foi o inteiramente casualizado com comparação entre médias pelo teste de Tukey (p < 0,05). A entalpia e a carga térmica radiante diferiram estatisticamente em todos os tratamentos sendo os menores valores apresentados pelos abrigos com cobertura de telha reciclada, 59,3 kJ kg-1 de ar seco e 444,8 W m-2, respectivamente. Não houve diferença significativa em nenhuma das variáveis fisiológicas estudadas, porém a frequência respiratória esteve elevada em todos os tratamentos sendo mais acentuada nos animais sob cobertura de fibrocimento (57,2 mov min-1) indicando mais suscetibilidade ao estresse térmico.

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“…According to CONCEIÇÃO et al (2008), many of the facilities use corrugated tiles, such as asbestos cement, for presenting lower cost than ceramic tiles. Furthermore, the construction is faster, easier to clean, which explains the preference of such cover (TCPO, 2008).…”

Section: Introductionmentioning

confidence: 99%

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

Almeida

Passini

2013

Eng. Agríc.

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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.

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Desempenho de telhas de escória de alto forno e fibras vegetais em protótipos de galpões

Cited by 13 publications

References 4 publications

Environment in poultry production covered with thermal and aluminum roofing tiles

Environment in poultry production covered with thermal and aluminum roofing tiles

Conforto térmico e desempenho de bezerras Girolando alojadas em abrigos individuais com diferentes coberturas

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

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