A correlation for the heat transfer coefficent in a rectangular passage containing protuberance

Abstract

An experimental investigation was carried out to determine the effect on the convective heat transfer coefficient of protuberances in a rectangular passage. A cross-flow compact type heat exchanger formed by several parallel spaced plates including protuberances was tested by using water, glycol and air as a working fluids. Heat transfer coefficient data was obtained by measuring mass flow-rate, temperature and pressure drops across the heat exchanger. Heat transfer characteristics are discussed and correlations for Nusselt number, Colburn factor and friction factor have been obtained.