ENHANCEMENT OF THERMAL AND PERFORMANCE OF MULTIPLE PASS HEAT EXCHANGER USING NANOPARTICLES

Thermal and hydrodynamics performance of1shell and 2-tubes heat exchanger with different concentrations of ethylene glycol, copper and alumina as nanofluid have been investigated, theoretically and numerically. The heat exchanger is 1shell- multiple pass with eight bend pipes. The hot water is flowed in the bend tubes and cooled by water with different types of nanoparticles in the shell flow. Three different types of nanoparticles, which are (ethylene glycol, copper and alumina), have been used in water as a working nanofluid. The results show that; the water-copper and water-alumina nanofluid have the best performance enhancement of the heat exchanger than ethylene glycol with effectiveness 0.175. Additionally, the minimum friction factor appears when the copper and alumina particles used. The numerical results are in a good agreement with theoretical results and the maximum percentage error of the effectiveness equal to 4%.