Experimental research and CFD analysis on double pipe heat exchanger with CuO nano particle suspended in cold water

In this paper, the heat transfer rate of CuO nanoparticle suspended cold-water flow in a double pipe heat exchanger is evaluated. The average size of CuO nanoparticles is 35 nm is dissolved in deionized water, flowing in the counter direction of a hot-water pipe. The velocity and the discharge rate were maintained constant and the dispersion rate of CuO nanoparticles was varied (0, 0.1, 0.2, and 0.3 mass%). The system inlet temperature (hot water) was 50 °C and the cold-water inlet temperature was found to vary with respect to the suspended particle proportion. The experimental results showed that the CuO nanoparticle has highly influenced to reduce the cold-water inlet temperature and heat transferred rate found to be drastically increased from 183 to 3488 kW. Subsequently, with appropriate input details and boundary conditions, the experimentation was simulated with valid computation fluid dynamics software. Simulated results confirmed that the lower concentration of CuO nanoparticle had less impact compared to that of higher concentration of suspended particles. It is found that the experimental results and simulated data found to be very similar, and hence it is confirmed that the proposed model can be executed for different heat exchanger designs.