Desempenho de telhas termoacústica em galpões em escala reduzida para galinhas poedeiras
Carregando...
Arquivos
Data
2021-03-01
Autores
Silva, Brayam Moreira da
Título da Revista
ISSN da Revista
Título de Volume
Editor
Universidade Estadual Paulista (Unesp)
Resumo
As mudanças climáticas afetam a produção animal com as altas temperaturas, influenciando assim o bem-estar das galinhas poedeiras, levando a estresse calórico e a grandes mortalidades, gerando perdas econômicas para o setor. Assim a presente pesquisa, analisou o desempenho térmico das telhas de fibrocimento, termoacústicas e cerâmica, em galpões em escala reduzida para analisar a performance e os níveis de conforto térmico das coberturas com três telhas, a verificar qual a cobertura traz melhor conforto térmico. O ambiente interno foi monitorado por meio de dataloggers, microcontroladores e sensores eletrônicos, para coletar dados de temperatura do ar e umidade relativa do ar de fevereiro a março de 2020. Com esses dados, foram desenvolvidos cálculos dos índices de conforto para galinhas poedeiras, ITU (Índice de Temperatura e Umidade), ITGU (Índice de Temperatura de Globo Negro e Umidade), CTR (Carga Térmica Radiante), TRM (Temperatura Radiante Média) e TE (Temperatura Efetiva). Com os resultados observou-se que, para o ITGU a telha cerâmica teve um desempenho médio de 2,35% melhor que a termoacústica, porém ambas tiveram um desempenho melhor que a telha de fibrocimento. Já para o ITU, a telha termoacústica foi a que teve o pior desempenho, pois foram constatados períodos com estresse severo causado pelo calor representando perigo, já com a telha de fibrocimento e a cerâmica foram as que obtiveram melhor resultado de acordo com o ITU. Ainda assim, a telha cerâmica mostrou melhor resultado que a de fibrocimento, tendo um resultado médio de 2,20% a menos no resultado. Os resultados obtidos pelo CTR para todas as telhas são parecidos, existindo uma diferença de até 10% entre elas, porém em dois dias houve um valor de diferença significativo das telhas termoacústicas, sendo muito acima da demais, chegando até a 40% de diferença. Para o indicador TE se observa que entre as três coberturas a telha cerâmica é a que possui a melhor temperatura efetiva, tendo uma temperatura média 6,55% a menos, seguida da telha termoacústica e, pôr fim, a telha de fibrocimento. Assim, de acordo com os resultados dos índices, considera-se o melhor desempenho térmico para a telha cerâmica, seguida telha termoacústica e a telha de fibrocimento.
Climate changes affect animal production with high temperatures, thus influencing the well-being of laying hens, leading to heat stress and high mortality, generating economic losses for the sector. Thus, the present research analyzed the thermal performance of fiber cement, thermoacoustic and ceramic tiles, in small scale sheds to analyze the performance and the thermal comfort levels of the roofs with three tiles, to verify which roof provides the best thermal comfort. The internal environment was monitored by means of dataloggers, microcontrollers and electronic sensors, to collect air temperature and relative humidity data from February to March 2020. With these data, calculations of comfort indexes for laying hens, ITU were developed (Temperature and Humidity Index), ITGU (Black Globe Temperature Index and Humidity), CTR (Radiant Thermal Load), TRM (Average Radiant Temperature) and TE (Effective Temperature). With the results it was observed that, for ITGU, the ceramic tile had an average performance of 2.35% better than the thermoacoustic one, however both had a better performance than the fiber cement tile. As for the ITU, the thermoacoustic tile was the one that had the worst performance, as periods with severe heat stress were found to represent danger, whereas the fiber cement tile and the ceramic tiles were the ones that obtained the best results according to the ITU. Even so, the ceramic tile showed a better result than the fiber cement, with an average result of 2.20% less in the result. The results obtained by the CTR for all tiles are similar, with a difference of up to 10% between them, but in two days there was a significant difference in value of the thermoacoustic tiles, being much above the others, reaching up to 40% difference. For the TE indicator, it is observed that among the three coverings, the ceramic tile has the best effective temperature, with an average temperature of 6.55% less, followed by the thermoacoustic tile and, finally, the fiber cement tile. Thus, according to the results of the indices, the best thermal performance for the ceramic tile is considered, followed by the thermoacoustic tile and the fiber cement tile.
Climate changes affect animal production with high temperatures, thus influencing the well-being of laying hens, leading to heat stress and high mortality, generating economic losses for the sector. Thus, the present research analyzed the thermal performance of fiber cement, thermoacoustic and ceramic tiles, in small scale sheds to analyze the performance and the thermal comfort levels of the roofs with three tiles, to verify which roof provides the best thermal comfort. The internal environment was monitored by means of dataloggers, microcontrollers and electronic sensors, to collect air temperature and relative humidity data from February to March 2020. With these data, calculations of comfort indexes for laying hens, ITU were developed (Temperature and Humidity Index), ITGU (Black Globe Temperature Index and Humidity), CTR (Radiant Thermal Load), TRM (Average Radiant Temperature) and TE (Effective Temperature). With the results it was observed that, for ITGU, the ceramic tile had an average performance of 2.35% better than the thermoacoustic one, however both had a better performance than the fiber cement tile. As for the ITU, the thermoacoustic tile was the one that had the worst performance, as periods with severe heat stress were found to represent danger, whereas the fiber cement tile and the ceramic tiles were the ones that obtained the best results according to the ITU. Even so, the ceramic tile showed a better result than the fiber cement, with an average result of 2.20% less in the result. The results obtained by the CTR for all tiles are similar, with a difference of up to 10% between them, but in two days there was a significant difference in value of the thermoacoustic tiles, being much above the others, reaching up to 40% difference. For the TE indicator, it is observed that among the three coverings, the ceramic tile has the best effective temperature, with an average temperature of 6.55% less, followed by the thermoacoustic tile and, finally, the fiber cement tile. Thus, according to the results of the indices, the best thermal performance for the ceramic tile is considered, followed by the thermoacoustic tile and the fiber cement tile.
Descrição
Palavras-chave
Poedeiras, Cobertura, Conforto, Índice de conforto, Sensores, Comfort Index