1 Anbar Journal Of Engineering Science©Vol. 8 (2019) 1 – 8 Unviersty of Anbar Anbar Journal Of Engineering Science© journal homepage: http:// http://www.uoanbar.edu.iq/Evaluate/ Experimental study on thermal performance of counter flow wet cooling tower and effect of fins angle a Mechanical and Energy Engineering Techniques Department, Erbil Technical Engineering College / Erbil Polytechnic University (hindren81@gmail.com, hindren.ali@epu.edu.krd ) b Mechanical and Energy Engineering Techniques Department, Erbil Technical Engineering College / Erbil Polytechnic University (aiyed67@gmail.com, aiyed67@epu.edu.krd ) PAPER INFO ABSTRACT Paper history: Received … … … Received in revised form … … … Accepted … … … The aim of this paper is to in investigate the performance characteristics of counter flow wet cooling towers experimentally by varying air and water temperatures, fins angle, rate of air flow, rate of water flow as well as the evaporation heat trans- fer, along the height of the tower. The analysis of the theoretical results revealed before that the thermal perfor- mance of the cooling tower is sensitive to the degree of saturation of inlet air. Hence, the cooling capacity of the cooling tower increases with decreasing inlet air temperature whereas the overall water temperature fall is curtailed with increasing water to air mass ratio. From the experimental study the efficiency of the cooling tower and cooling tower characteristics are higher in case of low mass flow ratio due to higher contact area of water to air. Because of better contact area between airs to water the drop in performance of the cooling tower is less. The effect of fins angle on the thermal performance of counter flow wet cooling tower was predicted. The experimental study showed that the cooling range, cool- ing coefficient, , heat load , change in air relative humidity and cooling tower ef- fectiveness increased with increasing fins angles and optimum fins angle obtained from this experimental work was 70 degree, at this angle all cooling tower perfor- mance has been calculated were better. While the approach increased with decreasing fins angles, the minimum approach was obtained for 70 degree fins angles and the maximum approach was obtained for 30 degree fins angles. Keywords: Cooling Tower, Performance Characteristics, Mass flow ratio, Fins angles © 2014 Published by Anbar University Press. All rights reserved. 1. Introduction Acooling tower is a semi-enclosed device for evaporative cooling of water by contact with air. It is a wooden, steel or concrete structure and corrugat- ed surfaces or baffles or perforated trays are pro- vided inside the tower for uniform distribution and better atomization of water in the tower. The hot water coming out from the condenser is fed to the tower on the top and allowed to tickle in form of thin drops ass in figure (1). The air flows from bot- tom of the tower or perpendicular to the direction of water flow and then exhausts to the atmosphere