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This paper reports experimental investigations on friction factor, Nusselt number and thermal hydraulic performance of a tube equipped with the classic three modified internally grooved tubes. The working fluid is water and ethylene glycol mixture 90:10 (by weight). Local heat transfer by forced convection from plain and grooved tubes is investigated for Reynolds number ranges 4900 to 13300. The increase in forced convective heat transfer coefficient in water and ethylene glycol mixtures results in a heat exchanger under turbulent flow is also reported. Among the grooved tubes, heat transfer enhancement obtained for the flow of water and ethylene glycol mixture is up to 36% for circular grooved tube 55% for square grooved tube and 10% for trapezoidal grooved tube in comparison with the plain tube.

international journal of chemical research

EXPERIMENTAL INVESTIGATION ON HEAT TRANSFER AND FRICTION FACTOR CHARACTERISTICS OF A WATER AND ETHYLENE GLYCOL MIXTURE FLOW OF INTERNALLY GROOVED TUBES