علاقة كتلة و سمك الحشوة في أداء وحدة التبريد التبخيري لقاعة الدواجن

Abstract EN

An experiment was undertaken at Al-Rashidia region around Baghdad to investigate the ability of using alhagi as a wet pad, and the effect of pad masses2,3and 4kg with pad thicknesses 6,9and 12cm during the period from 2 July to 8 Sept./2008.This was to measure interior dry bulb temperature, cooling efficiency ,air suction velocity ,air flow ,relative humidity and water consumption in order to determine which combination is better in evaporative cooling when used in poultry houses .A factorial experiment with a completely randomized design with three replicates was used.

Increasing in the pad mass from 2 to 3 kg (with no change in the pad thickness) led to obvious decrease in indoor dry bulb temperature, air suction velocity and air flow while increased cooling efficiency ,relative humidity and water consumption .When pad thickness was constant, increasi in pad mass from 3 to 4 kg decreased cooling efficiency, air suction velocity ,air flow ,relative humidity and water consumption ,but increased indoor dry bulb temperature due to the limitation in surface area to perform evaporative process.

By increasing pad thickness from 6 to 9 then to 12 cm at a constant pad mass, cooling efficiency, realitive humidity and water consumption were increased, while the indoor dry bulb temperature, air suction velocity and air flow have decreased.

The pad which constructed from 3 kg mass with pad thickness of 12 cm gave 22 cº interior dry bulb temperature, 87% cooling efficiency, 1.2m/sec air suction velocity, and air flow 21600m3 /hr, relative humidity 77.2% and the water consumption 3.8ℓ/min.

So, alhagi plants were sufficient as a wet filling and the pad made of 3 kg with pad thickness of 12cm was recommended.