Performance Evaluation of a Triple Concentric Tube Heat Exchanger Using Deionized Water and Oil-40

This study examines experimentally the performance of a horizontal triple concentric tube heat exchanger TCTHE made copper metal using water as cooling fluid and oil-40 hot fluid. Hot enters inner annular in direction at temperature 50, 60 70 oC flow rate 20 l/hr. On other hand, outer reverse (counter current flow) 25 rates 10, 15, 20, 25, 30 35 The is composed three tubes with diameters 34.925 mm, 22.25 9.525 thicknesses 1.27 1.143 0.762 respectively. tube's length was 670 mm. Nusselt number, overall transfer coefficient, convective coefficient (CHTC), friction factor pressure drop were measured from obtained experimental results plotted graphs against Reynold number volumetric water. These parameters appeared good process. numbers increased linearly DIW for both C1 C2 reaching maximum values 38.25 14.64 CHTC 2934.3 871.7 Overall reached 296.36 251.4 l/hr C2, Friction decreased increases, minimum 0.04 0.25 Pressure 81.4 4.31 turn leads to reduced size leading decrease construction cost exchanger.