الفهرس 
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Abstract
Thesis presented different types of coolers used for dry climate with more through explanation to two types; which are direct evaporative cooling and indirect evaporative cooling, this is for their low energy consumption compared to conventional vapor compression refrigeration systems. Thesis also present perforamance analysis for these two types of cooling systems using simplified governing equations solved by EES software.
from this analysis we concluded by explanation to the appropriate conditions for each cooler and recommandations of suitable cooler for dry climate.