MATHEMATICAL MODELING AND NUMERICAL SIMULATION FOR PREDICTING THE AMBIENT AIR TEMPERATURE AND RELATIVE HUMIDITY INSIDE RABBIT HOUSES | ||||
| Misr Journal of Agricultural Engineering | ||||
| Article 20, Volume 27, Issue 4, October 2010, Page 1327-1342 PDF (1.02 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/mjae.2010.104840 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| M. H. Hatem1; K. M. Abdelbary1; Nagwa A. Ahmed2; B. A. Mohamed1 | ||||
| 1Cairo University, Faculty of Agriculture, Agricultural Engineering Dept., Giza, Egypt. | ||||
| 2Cairo University, Faculty of Agriculture, Animal Production Dept. Giza, Egypt. | ||||
| Abstract | ||||
| The recent research work was carried out at the Rabbit Research Unit (RRU), Faculty of Agriculture, Cairo University, Giza, Egypt, during summer months, 2008 and 2009. It aimed to develop and validate a mathematical model for predicting the inside ambient air temperature (Ta) and relative humidity (RH) inside the rabbit housing systems. There are different factors are used in this analysis included the environmental parameters (air temperature, relative humidity and air velocity), structure thermal parameters [structure surfaces temperature for (walls – doors – windows – roofs – batteries)] physiological parameters and thermal-reactions (rectal, fur, skin and ear temperatures). Visual studio express C # (C sharp) was used to develop the computer software to predict the ambient air temperature. The model has been validated through a comparison between measured air temperature and predicted air temperature, measured relative humidity and predicted relative humidity inside the rabbit houses. Model validation results conducted that the model is a useful tool to decide when and how much to adjust the internal environment conditions inside rabbit housing system. Also it becomes more critical when the weather conditions change rapidly or not as predicted especially in hot months. | ||||
| Keywords | ||||
| Rabbit; Air temperature; Relative humidity; Rectal; Fur; Skin; Ear temperatures and Simulation model | ||||
| References | ||||
|
Aerts, J. M.; Wathes, C. M. and Berckmans, D. (2003). Dynamic data-based modeling of heat production and growth of broiler chickens: Development of an integrated management system. Biosystems Engineering, 84(3): 257-266.
ASHRAE, Handbook Fundamentals. (2009). American Society of Heating, Refrigerating and Air-Conditioning Engineers Inc. New York.
Da Borso, F.; Antonio, L.; Alessandro, C. and Roberto, C. (2006). Ventilation and cooling systems in intensive rabbit houses of northern Italy. An ASABE Meeting Presentation. Paper No., 064087. American Society of Agricultural and Biological Engineers. 2950 Niles Road, St. Joseph, MI. 4985-9659.USA.
Gebremedhin, K. G.; and WU, B. )2000(. A model of evaporative cooling of wet skin surface and fur layer. ASAE Paper No., 004114. American Society of Agricultural and Biological Engineers. 2950 Niles Road, St. Joseph, MI. 4985-9659.USA.
Hellickson, M. A., and J. N. Walker. (1983). Ventilation of Agricultural Structures. The American Society of Agricultural Engineers. 2950 Niles Roads, St. Joseph, MI. 49085-9659. USA.
Lebas, F.; Coudert, P.; de Rochambeau, H. and Thébault, R. G. (1997). Textbook, The Rabbit-Husbandry, Health and Production,FAO, Animal Production and Health Series No.: 21, Roma, Italy.
Medeiros, C. M. (2001). Ajuste de modelos e determinação de índice térmico ambiental de produtividade para frangos de corte. DS Thesis. Viçosa: Universidade Federal de Viçosa, Departamento de Engenharia Agrícola.
Medeiros, C. M. )1997(. Desenvolvimento e aplicação de modelo para simulação e desempenho de galinhas poedeiras e frangos de corte com uso de resfriamento evaporativo. MS Thesis. Viçosa: Universidade Federal de Viçosa, Departamento de Engenharia Agrícola.
Okab, A.B.; El-Banna, S.G. and Koriem, A. A. (2008). Influence of environmental temperatures on some physiological and biochemical parameters of New-Zealand rabbit males. Slovak J. Anim. Sci., 41, (1): 12 – 19.
Verga, M.; Luzi, F. and Carenzi, C. (2007). Effects of husbandry and management systems on physiology and behavior of farmed and laboratory rabbits. Sci. Direct, Hormones and Behavior, 52: 122 – 129.
Werner, J. and Graener, R. (1986). Thermoregulatory responses to cold during a 7-week acclimatization process in rabbits. European Journal of Physiology, 406:547 – 551. | ||||
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