Characterizing Erficiency of Misting Systems for Poultry

Bottcher, R. W.; Baughman, G. R.; Gates, Richard S.; Timmons, Michael B.

doi:10.13031/2013.31703

Cited by 29 publications

(24 citation statements)

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“…Bottcher et al [26] and Singletary et al [27] characterized the evaporation efficiency b of fogging systems used for cooling poultry houses and they correlated this factor as functions of the pump working pressure, dry bulb temperature, relative humidity and vapor pressure deficit inside the house. How b is affected by the inside and outside greenhouse environment as well as the evaporation mechanism in the greenhouse is not known.…”

Section: Energy Balance Equationsmentioning

confidence: 99%

Dynamic modeling of the environment in a naturally ventilated, fog-cooled greenhouse

Abdel-Ghany

Kozai

2006

Renewable Energy

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Section: Energy Balance Equationsmentioning

confidence: 99%

Dynamic modeling of the environment in a naturally ventilated, fog-cooled greenhouse

Abdel-Ghany

Kozai

2006

Renewable Energy

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“…Room evaporative cooling and head ventilation systems help reducing the negative effects of high temperatures in farrowing rooms (Dong et al, 2001;Barbari & Guerri, 2005). Misting systems are lower in efficiency when compared to conventional pad systems (Roller & Goldman, 1969;Bottcher et al, 1991) but the equipment noise may cause animal agitation (Barbari & Guerri, 2005). Thermal index evaluation in swine confinement has been used to identify regions suitable for a particular housing design .…”

Section: Introductionmentioning

confidence: 99%

Physiological and productive responses of environmental control on housed sows

Romanini

Tolon

Nääs

et al. 2008

Sci. agric. (Piracicaba, Braz.)

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Swine housing must promote an adjusted environment for thermal comfort and high animal productivity without negatively affecting the sow performance and reproductive response. This study evaluated the use of distinct environmental cooling equipments on sow performance, both on the gestation and on nursing in open sided housing. Two treatments were tested in the gestation building: natural ventilation and mechanical ventilation associated to fogging; while in the nursing rooms three treatments were tested: natural ventilation; mechanical ventilation; and evaporative cooling with forced ventilation. Sows were randomly chosen from the same genetic lot form six combined treatments. The evaporative cooling system in the farrowing room differed for piglet performances, at birth (4% higher) and on daily weight gain (15% higher), and also for sow physiological response improving the respiratory rate (8%) and back fat thickness (3%), without influencing skin temperature. The use of evaporative cooling directed to the sow head during nursing improved the physiological and productive results. Key words: gestating sows, lactating sows, thermal stress RESPOSTAS FISIOLÓGICAS E PRODUTIVAS DO CONTROLE AMBIENTAL EM FÊMEAS SUÍNAS ALOJADASRESUMO: As instalações suínicolas devem promover um ambiente adequado para o conforto térmico, sem afetar negativamente o desempenho produtivo e reprodutivo das porcas. O presente trabalho avaliou a influência do uso de diferentes equipamentos de climatização, em ambas as instalações abertas de gestação e maternidade, no desempenho das matrizes suínas. Na instalação de gestação foram testados dois tratamentos: ventilação natural e resfriamento; enquanto nas salas de maternidade foram aplicados três tratamentos: ventilação natural, ventilação mecânica e resfriamento adiabático com ventilação forçada. Matrizes escolhidas aleatoriamente, com a mesma genética, foram expostas a seis tratamentos combinados. O sistema de resfriamento adiabático na maternidade foi diferencial para o desempenho dos leitões ao nascer (4% superior) e no ganho de peso diário (15% superior), e também para as respostas fisiológicas das porcas com melhorias nos resultados de freqüência respiratória (8%) e espessura de toucinho (3%). Não houve influência na temperatura de pele dos animais. O uso de resfriamento evaporativo direcionado para a cabeça das porcas na maternidade demonstrou ser um procedimento positivo com melhorias nos resultados fisiológicos e produtivos. Palavras-chave: matrizes suínas gestantes, matrizes suínas em aleitamento, estresse térmico

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“…These difficulties have prompted considerable research into misting systems operation over the last decade (Berry et al, 1990;Bottcher et al, 1991Bottcher et al, ,1989Bottcher et al, ,1988Bottcher and Baughman, 1990;Gates et al, 1991aGates et al, , 1991bTimmons and Gates, 1989;Timmons and Baughman, 1983;Willis et al, 1987;Wilson et al, 1983). Efficiency of misting systems typically are much less than evaporative pad systems' efficiencies.…”

Section: Introductionmentioning

confidence: 99%

“…Efficiency of misting systems typically are much less than evaporative pad systems' efficiencies. Misting system efficiency depends on misting particle size, which in turn depends on line pressure for a given misting nozzle configuration (Bottcher et al, 1991). Evaporative pad systems have been shown to be very effective in reducing broiler heat stress (Simmons and Deaton, 1988), and to be cost effective (Timmons and Gates, 1989).…”

Section: Introductionmentioning

confidence: 99%

“…Thus, a model for predicting effects of nozzle placement on conditions in a tunnel-ventilated broiler building may assist in optimizing distribution of such nozzles. A method for characterizing misting efficiency based on the fraction of the misting water flow rate which evaporates has been applied to poultry housing (Bottcher et al, 1991) and would presumably be appropriate for such a model.…”

Section: Introductionmentioning

confidence: 99%

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Field Calibration of a Transient Model for Broiler Misting

Gates¹,

Overhults²,

Bottcher³

et al. 1992

Transactions of the ASAE

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Click here to let us know how access to this document benefits you.ABSTRACT A transient model to predict temperature within a tunnel ventilated broiler house during misting is developed. The model is calibrated with field data to obtain steady-state constants; transient predictions are compared to measured temperatures during cyclic misting for two different size birds. Measured temperatures during cyclic misting are shown to swing between steady-state asymptotes predicted from the model. Transient response of the model was faster than measured temperature data, in part due to temperature sensor dynamic response. The model predicts the lengthwise temperature profile within the building during misting, and can be used to investigate alternate misting strategies and designs. Further improvements to the model are suggested.

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Characterizing Erficiency of Misting Systems for Poultry

Cited by 29 publications

References 0 publications

Dynamic modeling of the environment in a naturally ventilated, fog-cooled greenhouse

Dynamic modeling of the environment in a naturally ventilated, fog-cooled greenhouse

Physiological and productive responses of environmental control on housed sows

Field Calibration of a Transient Model for Broiler Misting

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