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| Silva,Irenilson M. da; Pandorfi,Heliton; Almeida,Gledson L. P. de; Guiselini,Cristiane; Caldas,Anildo M.; Jacob,Arthur L.. |
| Propõe-se, com este trabalho, caracterizar a variabilidade espacial da temperatura do ar na sala de pré-ordenha a partir de diferentes tempos de operação do sistema de resfriamento adiabático evaporativo automatizado. A variável temperatura do ar foi registrada em 35 pontos equidistantes 1 m, na forma de malha, para o estudo da variabilidade espacial e a construção de mapas por krigagem. Foram considerados diferentes tempos de exposição dos animais a climatização no curral de espera, 20, 30, 40 min e controle (0 min). Por meio dos resultados obtidos foi possível verificar que o uso da geoestatística possibilitou definir áreas com diferentes variabilidades espaciais para temperatura do ar, definindo áreas específicas na sala de pré-ordenha que apresentaram... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ambiência; Bem-estar; Conforto térmico; Variabilidade espacial. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662012000800013 |
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| Silva,Irenilson M. da; Pandorfi,Héliton; Almeida,Gledson L. P.; Guiselini,Cristiane; Henrique,Hugo M.. |
| The aim of this paper was to evaluate the automated acclimatization effects during pre-milking of cows on thermal conditioning, physiology, milk production and cost-benefit of the automated adiabatic evaporative cooling system (AECS). The treatments 20; 30; 40 min and control consisted of exposure time of pre-milking cows to the automated AECS. Sixteen cows were used with an average daily milk yield of 19 kg, distributed in a 4 x 4 Latin square design. The Tukey's test (P<0.05) was used to compare the means. The environmental variables, dry bulb temperature (DBT, ºC) and relative humidity (RH, %), were recorded every minute, which allowed the determination of the system efficiency through the Temperature and Humidity Index (THI). The respiratory rate... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Thermal comfort; Automation; Dairy cattle; Evaporative cooling system. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162011000500002 |
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| Silva,Irenilson M. da; Pandorfi,Héliton; Vasconcelos,Ângelo J. S. de; Laurenti,Renato; Guiselini,Cristiane. |
| Due to the importance of the environment on animal production and thus environmental control, the study aims to build a system for monitoring and control the meteorological variables, temperature and relative humidity, low cost, which can be associated with an evaporative cooling system (ECS). The system development included all the stages of assembly, test and laboratory calibration, and later the validation of the equipment carried in the field. The validation step showed results which allowed concluding that the system can be safely used in the monitoring of these variables. The controller was efficient in management of the microclimate in the waiting corral and allowed the maintenance of the air temperature within the comfort range for dairy cattle in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Dairy cattle; Thermal comfort; Instrumentation. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162013000100001 |
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