Heat Transfer Enhancement in Micro-fin Tube Using Coil Wire Insertions of Different Lengths

Heat transfer augmentation techniques are generally employed in thermal power plants, refrigerators, radiators for space vehicles, automobiles, process industries, heating and cooling in evaporators, air-conditioning equipment, etc. Inserting coiled wire in microfin tubes are a typical technique that offers a higher heat transfer increase and, at the same time, only a mild pressure drop. One of the passive heat transfer augmentation techniques been used is coiled wire insert and are widely used tubes in several heat transfer applications. Flow conditions as well as Reynolds number directly affect the thermodynamic performance of heat exchange components. Rate of heat transfer, Heat Transfer Coefficient, Pressure drop in case of microfin tube with coil wire insertion is higher than that of without coil wire insertion. Friction factor decreases with the increment in mass flow rate of hot water for the microfin tube with and without coiled wire insert. Wire coils at a constant pumping power shows an increase in heat transfer at low Reynolds number.