Consulta: creatorFacets:"Saraz,Jairo A. O."
Registros recuperados: 3
Data/hora: 09/06/2024 19:07:48

VALIDATION OF A HEATING SYSTEM IN THE FARROWING HOUSE USING A CFD APPROACH
Provedor de dados: 70
Autores: Damasceno,Flávio A.; Oliveira,Carlos E. A.; Saraz,Jairo A. O.; Schiassi,Leonardo; Oliveira,Jofran L. de.
ABSTRACT The current heating system for piglets in the farrowing usually uses incandescent lamps and, in some cases, heated floors with electric resistances, which in most cases generates a high energy cost. Thus, the implantation of systems that use renewable energies in the heating of piglets can allow the thermal comfort of the animals without reducing the productive development. The objective of this research was to evaluate a computer model in Computational Fluid Dynamics (CFD), which predicts surface temperature in the heating system of a farrowing house. The study was conducted during the summer season on the swine sector of Federal University of Lavras, Brazil. For this study, a prototype solar heater using alternative materials (ASWH) was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Swine; Computational modelling; Simulation.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162018000400471

A CFD approach to assess the effects of different opening combinations in poultry houses
Provedor de dados: 91
Autores: Saraz,Jairo A. O.; Rocha,Keller S. O.; Damasceno,Flavio A.; Tinoco,Ilda F. F.; Osorio,Robinson; Tobón,Julio C. A.
ABSTRACT The aim of this study was to use computational fluids dynamics (CFD) to evaluate hygiene and comfort conditions in function of temperature level and ammonia (NH3) concentration during the night in commercial poultry houses used in Brazil and countries with tropical and subtropical climates. Four models with different curtain heights and different air inlet and outlet positions were used, adopting the open building typology without thermal insulation. The validated CFD model did not present statistical differences from the experimental data, making it possible to use this model to predict the behavior in the four proposed cases. This model can be used to improve the internal conditions of the poultry facilities during the night and could be an...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Natural ventilation; Ammonia concentration; Computational simulation.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017001200852

Welfare and spatial distribution of noise levels in swine nursery
Provedor de dados: 91
Autores: Damasceno,Flavio A.; Oliveira,Carlos E. A.; Ferraz,Gabriel A. e S.; Nascimento,João A. C. do; Saraz,Jairo A. O.; Brandão,Leidimar F.
ABSTRACT The aim of this study was to evaluate the welfare and spatial distribution of noise levels in a swine nursery during the first three weeks of animal’s life. The climatic conditions were evaluated through the dry-bulb temperature (Tdb), relative humidity (RH) and black globe temperature and humidity index (BGHI) and allowed us to observe that the heating system influenced the conditions in the environment, and the use of the air conditioning system did not guarantee animal’s comfort conditions. The analysis on the spatial distribution of noise levels was performed using geostatistics and demonstrated the occurrence of spatial variability inside the facilities. The highest frequencies of noise levels were concentrated between 60 and 70 dB, and the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pig farming; Thermal comfort; Sound pressure; Spatial variability.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000300196