Comparative analysis of thermal and fluid flow behaviour of diverse nano fluid using Al2O3, ZnO, CuO nano materials in concentric spiral tube heat exchanger

Abstract

Present paper based on computational and experimental study, in which diverse parameters have been investigated for observing the fluid flow, thermal and performance attributes like thermal performance factor, NTU, effectiveness and fluid flow attributes like Reynolds number, Nusselt number, Friction factor, HTR etc of diverse composition of nanofluids in spiral tube having insert, CTHE with insert diameter and pitch distance 2 mm and 20 mm. During present investigation water used as the base fluid associated with diverse additives or nano particles in single and combined form like Zinc Oxide, Aluminium Oxide and Cupric Oxide to form diverse composition of nano fluids with 10 nm particle size and 0.08% volume fraction like Zinc Oxide with water, Aluminium Oxide with Zinc Oxide with water, Aluminium Oxide with water and Aluminium Oxide with Cupric Oxide with water to improve the thermal conductivity. Experimentation has been performed for diverse nanofluids at 31 OC with flow range 0.721 to 2.941 L/min, which flows in the spiral tube whereas, the hot fluids as water flows at 4.02 L/min across the shell side of test set up at 50 OC. Here comparative investigation has been drawn for diverse nanofluids for observing its fluid flow, thermal and performance attributes at diverse flow rate with turbulent flow under counter flow condition with Reynolds Number 4236 to 18540. The result predicted that out of four diverse nano fluids Aluminium Oxide and Cupric Oxide with water as base fluid shows best results for fluid flow, thermal and performance attributes, for flow rate range 0.721 to 2.941 L/min and Reynolds Number 4236 to 18540. It has been evaluated that from minimum to maximum Reynolds Number, HTR, Nusselt number, Friction factor and effectiveness and NTU varies from 1228.3 to 3316.4, 88.28–160, 0.0438–0.0306, 0.84–0.55, 4.66–1.96 for Aluminium Oxide and Cupric Oxide nano fluid.