journal of kerbala university

In this research, an experimental study is conducted to design a proposed air cooler with four doors to suit the weather conditions in Iraq and especially in Karbala city. This is due to the inability of normal air cooler to reduce the weather’s temperature degree. The proposed air cooler is designed to increase the cooling effectiveness and to obtain temperature degrees within the comfort chart of human beings. For this purpose, two air coolers of the same size and type (Barfab) are configured and one of these air coolers is adjusted to become an air cooler with four doors, where the cold air is pushed from the bottom side. Study and experiment are conducted on both the proposed and the normal air coolers at the same time and within the same weather conditions, for comparison purposes. The experimental results of the performance of the air coolers show that the effectiveness of the proposed air cooler (30.3% - 75.4%) is higher than the effectiveness of the normal air cooler (15.2% - 70.4%) from 33oC to 42oC. However, the cooling effectiveness of both air coolers is the same at 42oC and 43oC. Accordingly, the high cooling effectiveness of the proposed air cooler compared with the normal one, in addition to its reduction in the temperature degrees of the air coming out of the air cooler, confirms the priority of utilising the proposed air cooler under most of the weather conditions of Iraq