Enhancement of Double-Pipe Heat Exchanger Effectiveness by Using Porous Media and TiO2 Water

In this paper, the rate of heat transfer by forced convection in a counterflow exchanger, at turbulent flow conditions were investigated experimentally, using porous media and TiO2 Nanofluid to observe behaviour with volume concentration nanoparticles t enhance through it. 3 mm Steel balls (ε=39.12%) as completely filled inner pipe (core pipe). The cold hot water are used working fluids outer pipes. Then using, nanofluid instead flowing characteristics. effects operating parameters include (4 LPM, 6 8 LPM), Reynolds number between (3000 – 7000), nanoparticle fraction (0.001, 0.002 0.003) on Convective co-efficient Nusselt number. Effective thermal conductivity is increased when increased. coefficient increases decreasing temperature, but heating fluid's temperature has no significant effect nanofluid's coefficient. results show that TiO2-based improve 4 LPM 35.4% NTU effectiveness 4LPM 12.4%, 24%, respectively, compared pure without media. This improvement thermophysical properties yielded high exchangers process industries.