Three Stages of Indirect Evaporative Cooling: Experimental and Theoretical Evaluation Study
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Abstract
Economical energy, reduction of cost and utilization of clean energy are required to meet the human needs. Evaporative cooling units are considered as a solution for these require -cements by transforming such systems into technologies that meet these needs. The equipment’s cost, installation and oper-acting costs are simple and low compared with refrigeration systems. An effective design is obtained by employing three stages settlement that equipped with a cross flow heat exchan-ger,direct and indirect evaporative coolers. In order to assess the design performance, a program code is developed. Flow and design parameters namely, air flow rate, piping length and diameter are studied. In addition to that the inlet air-dry bulb temperature at several different time duration over day is studied. The study was conducted in Tikrit University, Iraq (34.35N;43.37E).Readings are recorded in June, July and end of August for two days(24hours a day). The results show that, saturation of direct evaporative cooler effectiveness varies in the range,67%-96% and overall effectiveness of the unit varies in the range,80%-120%.It is provided that the system is efficient in dry and hot areas, and an improvement in the performance of the current design is achieved successfully.
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