EXPERIMENTAL AND NUMERICAL INVESTIGATION TO THE EFFECT OF EGG SHELL NANOPARTICLES ON THE PERFORMANCE OF DOUBLE PIPE HEAT EXCHANGER

ABSTRACTThermal systems are involve in many applications the most important of which are cooling system, so most research aims to improve heat transfer, the enhancement of egg shell nanoparticles with distilled water in double pipe counter flow heat exchanger was studied. The results show that Nusselt number increase as volume concentration and Reynolds number increase. The increasing percentage of Nusselt number, friction factor, performance factor of (10.95, 11.878 and 6.88)% respectively than plain tube for maximum volume concentration and volume flow rate 5%,1.6 l/min respectively, fully developed turbulent flow, homogeneous Nano fluid with ranging Reynolds number from 3256.27 to 5202.33. ANSYS FLUENT 2015 package is used to simulate the heat transfer and fluid flow in the heat exchanger. The results show that the heat transfer increases when Nano fluid was added. The agreement observed with the experimental work with maximum discrepancy (12%).