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An investigation was executed to study the impact of using different thicknesses for pad cooling and various airflow rates on the cooling system effectiveness inside the house of broilers and on its performance in the summer of 2019, Egypt (latitude angle of 30.42°N and longitude angle of 30.59°E). The trial was done using 20, 30, 40, and 50 m3 /s. airflow rates, As well as using ten and fifteen cm pad thickness. The experimental work results' pointed to using a pad cooling system with fifteen cm pad thickness with 20, 30, 40, and 50 m3 /s airflow rates increase the temperature cooling effect by 25.54, 30.89, 13.36, and 44.63 % comparing with using ten cm pad thickness for the same previous flow rates, respectively. Cooling efficiency increased by 24.73, 29.5, 12.17, and 44.46% when using a cooling system with fifteen cm pad thickness comparing with using a cooling system with ten cm pad thickness for 20, 30, 40, and 50 m3/s airflow rates, respectively. The average value of pad water consumption decreased by 57 % when using a fifteen cm pad cooling system compared to a 10 cm pad cooling system. The lowest mean value for T.H.I. was 25.4°C at an airflow rate of 50 m3/s for fifteen cm pad thickness. Reared birds in the house with fifteen cm pad cooling thickness were not stressed, according to T.H.I. Value and thus lead to increasing the production Efficiency factor by 17.91% comparing with using a ten cm pad cooling system.

The Assessment of Pad-Fan Evaporative Cooling System in Broiler Housing تقدیر معاییر نظام وسادة – مروحة للتبرید بالتبخیر فى مساکن دجاج التسمین