Experimental study of heat transfer coefficient in heat exchanger reactors with square millimetric zigzag channels

• Heat exchanger reactor prototypes are designed to study heat transfer in millimetric channels. coefficients zigzag channels 2 5 times higher than straight decreases when the channel cross section increases. A correlation is proposed for coefficient estimation performances of compact reactors were experimentally characterized and measurement uncertainties evaluated using derivation method. Prototypes presenting two kinds process configurations (zigzag channels) with square cross-section investigated, from mm 4 depth. Water or glycerol-water mixture used as fluid, cooled by water utility fluid. Reynolds number ranged between 15 7300 Prandtl 3.1 115. From measurements fluid temperatures flow rates, local calculated. In channels, it 760 15,000 W.m ?2 .K ?1 , an average uncertainty 15.7%. With channel. The experimental data then establish a Nusselt function geometry, properties rates expressed terms dimensionless numbers. relative difference calculated values was 9.1%. Finally, consistency confirmed comparison obtained previous work based on CFD.