Effect of cooling pad installation on indoor airflow distribution in a tunnel-ventilated laying-hen house

Hui Xue, Zhu Qiang, Ji-Qin Ni, Li Baoming, Shi Zhengxiang, Zhao Shumei, Wang Yu

Abstract


Extra cooling pads on the sidewalls are needed for larger poultry houses using tunnel ventilation system. Preliminary study showed that the airflow velocity going through different aisles varies greatly when the extra pads are installed at the end of sidewalls, making a “[”-shape air inlet. Combined with field tests, the CFD (computational fluid dynamics) technology was used to study the uniformity of airflow distribution in a tunnel-ventilated laying-hen house. The air distribution was first monitored in a layer house to find the main reason resulting in the variations of airflows in different aisles. Then CFD simulations were carried out with different distances (D=2 m, 3 m or 4 m) between the pads on end-wall and the extra pads on side walls. The field test showed that airflow streams from the different groups of cooling pads collided vertically at the house corners, mixed with each other, then flew towards the center of the house. This was the main reason that the wind speed in the middle aisle was much higher than in other aisles, leaving large zones of lower ventilation in the aisles adjacent to the sidewalls. The results of CFD simulations indicated that air distributions could be significantly improved when the extra pieces of pads were moved away for an appropriate distance from the end coolingpads. As far as conventional poultry house with a span of 12 m, the air speeds in different aisles were more uniform when this distance was about 3 m.
Keywords: Pad cooling system, air distribution, air speed, laying-hen house; CFD
DOI: 10.3965/j.ijabe.20160904.2447

Citation: Hui X, Zhu Q, Ni J Q, Li B M, Shi Z X, Zhao S M, et al. Effect of cooling pad installation on indoor airflow distribution in a tunnel-ventilated laying-hen house. Int J Agric & Biol Eng, 2016; 9(4): 169-177.

Keywords


pad cooling system, air distribution, air speed, laying-hen house; CFD

Full Text:

PDF

References


Wang C Y, Cao W, Li B M, Shi Z X, Geng A L. A fuzzy mathematical method to evaluate the suitability of an evaporative pad cooling system for poultry houses in China. Biosystems Engineering, 2008; 101(3): 370–375. Doi:10.1016/j.biosystemseng.2008.08.005.

Li B M, Zhou Y J, Cui Y A. Study and use of tunnel ventilation system for poultry houses in summer. Transactions of the CSAE, 1992; 8(4):83–89.(in Chinese with English abstract)

Daghir, N J. Poultry Production in Hot Climates (2nded.). Trowbridge: Cromwell Press, 2007. pp.109–114.

Xin H W, Berry I L, Tabler G T, Barton T L. Temperature and humidity profiles of broiler houses with experimental conventional and tunnel ventilation systems. Applied Engineering in Agriculture, 1994; 10(4): 535–542.

Ndukwu M C, Manuwa S I. Review of research and application of evaporative cooling in preservation of fresh agricultural produce. International Journal of Agricultural and Biological Engineering, 2014; 7(5): 85–102.Doi: 10.3965/j.ijabe.20140705.010.

Ndukwu M C, Manuwa S I. Techno-Economic assessment for viability of some waste as cooling pad in evaporative cooling system. International Journal of Agricultural and Biological Engineering, 2015; 8(2): 151–158. Doi:10.3965/j.ijabe.20150802.952.

Ruzal M, Shinder D, Malka I, Yahav S. Ventilation play an important role in hen’s egg production at high ambient temperature. Poultry Science, 2011; 90:856–862.Doi:10. 3382/ps.2010-00993.

Kittas C, Bartzanas T, Jaffrin A. Temperature gradients in a partially shaded large greenhouse equipped with evaporative cooling pad. Biosystems Engineering, 2003; 85(1):87–94. Doi:10.1016/S1537-5110(03)00018-7.

Wang Xiaoshuai. Study on the indoor thermal environmental simulation and optimal design on livestock building based on CFD. Hangzhou: Zhejiang University, 2014, 3. pp. 55–58.

Green A R, Wesley I, Trampel D W, Xin H. Air quality and bird health status in three types of commercial egg layer houses. The Journal of Applied Poultry Research, 2009; 18(3):605–621. Doi: 10.3382/japr.2007-00086.

Hellickson M A, Walker J N. Ventilation of Agricultural Structures. Michigan: American Society of Agricultural Engineer, 1983. pp. 25–39.

Calvet S, Cambra-López M, Blanes-Vidal V, Estellésa. F, Torresa A G. Ventilation rates in mechanically-ventilated commercial poultry buildings in Southern Europe: measurement system development and uncertainty analysis. Biosystems Engineering, 2010; 106(4): 423–432. Doi:10.1016/j.biosystemseng.2010.05.006.

Wheeler E F. Inlets for mechanical ventilation systems in animal housing. Available: www http://engrabe.cedcc.psu.edu. Accessed on [2016-2-24].

Randall J M. The Prediction of Airflow Patterns in Livestock Buildings. Journal of Agricultural Engineering Research, 1975; 20(2): 199–215. Doi: 10.1016/0021-8634(75)90086-4.

Czarick M, Fairchild B. Air speed distribution in tunnel-ventilated houses – Part Ι. Available: www.poultryventilation.com. Accessed on [2016-2-24].

Chai L D, Ni J Q, Diehl C A, Kilic I, Heber A J, Chen Y, et al. Ventilation rates in large commercial layer hen houses with two-year continuous monitoring. British Poultry Science, 2012; 53(1): 19–31. Doi:10.1080/00071668.2011. 643766.

Zhao Y, Xin H, Shepherd T A, Hayes M D, Stinn J P. Modelling ventilation rate, balance temperature and supplemental heat deed in alternative vs. conventional laying-hen housing systems. Biosystems Engineering, 2013; 115(3): 311–323. Doi:10.1016/j.biosystemseng. 2013.03.010.

Chen L D, Lim T T, Jin Y M, Heber A J, Ni J Q, Cortus E L, et al. Ventilation rate measurements at a mechanically-ventilated pig finishing quad barn. Biosystems Engineering, 2014; 121: 96–104. Doi:10.1016/j. biosystemseng.2014.02.015.

Ni J Q, Chai L L, Chen L D, Bogan B W, Wang K Y, Cortus E L, et al. Characteristics of ammonia, hydrogen sulfide, carbon dioxide, and particulate matter concentrations in high-rise and manure-belt layer hen houses. Atmospheric Environment. 2012; 57: 165–174. Doi:10.1016/j.atmosenv. 2012.04.023.

Cao G Y, Awbi H, Yao R, Fan Y Q, Sirén K, Risto K, et al. A review of the performance of different ventilation and airflow distribution systems in buildings. Building and Environment, 2014; 73: 171–186. Doi:10.1016/j.buildenv. 2013.12.009.

Deng S H, Shi Z X, Li B M, Zhao S M, Ding T, Z W P. CFD simulation of airflow distribution in low profile cross ventilated dairy cattle barn. Transactions of the CSAE, 2014; 30(6):139–146. Doi:10.3969/j.issn.1002-6819.2014. 06.017. (in Chinese with English abstract)

Norton T, Sun D W, Grant J, Fallon R, Dodd V. Applications of computational fluid dynamics (CFD) in the modelling and design of ventilation systems in the agricultural industry: A review. Bioresource Technology, 2007; 98(12): 2386–2414. Doi:10.1016/j.biortech.2006. 11.025.

Mostafa E, Lee I B, Song S H, Song S H, Kwon K S, Seo I H, et al. Computational fluid dynamics simulation of air temperature distribution inside broiler building fitted with duct ventilation system. Biosystems Engineering, 2012; 112(4): 293–303. Doi:10.1016/j.biosystemseng.2012.05.001.

[24] Rong L, Nielsen P V, Bjerg B, Zhang G Q. Summary of best guidelines and validation of CFD modeling in livestock buildings to ensure prediction quality. Computers and Electronics in Agriculture, 2016, 121: 180–190.

Blanes-Vidal V, Guijarro E, Balasch S, Torres A G. Application of computational fluid dynamics to the prediction of airflow in a mechanically ventilated commercial poultry building. Biosystems Engineering, 2008; 100(1): 105–116. Doi:10.1016/j.biosystemseng.2008.02.004.

Harral B B, Boon C R. Comparison of predicted and measured airflow patterns in a mechanically ventilated livestock building without animals. Journal of Agricultural Engineering Research, 1997; 66(3): 221–228. Doi:10.1006/jaer.1996.0140.




Copyright (c)



2023-2026 Copyright IJABE Editing and Publishing Office