Study the effect of the some of the dominant effective parameters In the heat performance to evaporative air cooler

	Study the effect of the some of the dominant effective parameters In the heat performance to evaporative air cooler
Iraqi journal of mechanical and material engineering
Article 1, Volume 9, Issue 2, 2009, Pages 249-264
Abstract
This study included the effect of the some of the dominant effective parameters In the heat performance to evaporative air cooler, like flow rate of water that used as cooling medium in addition to the climatic conditions , besides study effect of treating heat exchanger surfaces by sawdust from wetted channels side, where in this study the design and installation of evaporative air cooler was carried out using completely outdoor air ( fresh air ) according to two stage evaporative cooling principle . The laboratory equipment was installed by designing and manufacturing a cross flow plate heat exchanger , where aluminum plates used for this purpose with dimensions ( 50 × 30 × 40 cm ) . The surfaces of heat exchanger were covered by sawdust from wetted channels side , to increase the percentage of wetting these surfaces and hence improve the performance and efficiency of air cooler . Water flow rate was varied from ( 144 L / hr ) to ( 1050 L / hr ) . Also effect of air dry bulb temperature was studied where varied from ( 30 oC ) to ( 50 oC ) , and ( 19.8 to 26.4 oC ) for the wet bulb temperature . The experimental results showed that the optimum flow rate of water that must be circulated in the cooling system was ( 450 L / hr ) , by using air at temperature ( 42 oC ) for dry bulb and ( 21.9 oC ) for wet bulb . The results were obtained at previously mentioned conditions concerning the cooling efficiency was ( 61.48 % ) , and the coefficient of performance ( 33.50 ) , and specific power consumption reaches ( 4.7 W. min / kg dry air ) .

Statistics Article View: 80