USING TIO2 NANOFLUID FOR ENHANCING PERFORMANCE OF A WATER CHILLER

Abstract

In the present work, an experimental study is carried out to enhance the performance of the water chiller system by using nanofluid (water+TiO2 ) on the shell side of the chiller with different volume concentrations (0.05%, 0.075%, and 0.1%). Experimental work includes two parts; In the first one COP of the system is calculated by using two alternative refrigerants (R-407c and R-134a). In the second part, the optimum COP is found using various concentrations of TiO2 nanofluid for systems with an alternative refrigerant. Experimental results show that the COP of R-134a is better than R407c which will be used in the second part of the present study with nanofluid on the shell side of the system. The COP with (0.1%) nanofluid has been found to increase by (8.5%).