NUMERICAL SIMULATION OF DOUBLE PIPE HEAT EXCHANGER BY USING WATER_ZNO NONO FLUID

Abstract

A double-pipe heat exchanger was fabricated to experimentally investigate the thermal conductivity of distilled water with nanoparticle additives. Nanoparticles (0.05%) were dispersed in pure water to form a nanofluid. The system was tested at two flow rates: 4 and 6 L/min. Temperature and flow fields were studied during the simulations. A numeri-cal study was also carried out to further calculate the overall heat transfer coefficients and heat transfer rates for pure water and nanofluid nanoparticles with 0.05% mass fraction. Thermal performance was significantly increased with the application of the nanofluid, by these results. The overall heat transfer coefficient was higher than pure water by ∼25% and ∼35% for a flow rate of 4L/min and 6 L/min, respectively. Besides, bold heat transfer with good flow dynamics was shown for thenanofluid. Of the flow rates tested, 6 L/min resulted in a 10% increase in thermal performance when compared to the 4 L/min case, highlighting benefit of employing higher fluid flows for nanofluids within thermal systems. Results underscore the potential use of nanoparticles in improving heat exchanger efficiency and minimizing thermal energy losses, resulting in approximately 30% higher thermal efficiency than pure water for the same environmental and operational conditions