Study of thermal effectiveness in shell and helically coiled tube heat exchanger with addition nanoparticles

Abstract Thermal effectiveness was performed as preliminary research in shell and coiled tube heat exchanger with addition of Al2O3 nanoparticles. In the present study, the effect of small concentration of Al2O3 nanoparticles analysis for steady state. Water is selected as the working fluid of cold fluid and refrigerant R-22 as hot fluid. The present work also includes the effect of nanoparticles on logarithmic temperature difference (LMTD), amount of heat absorbed by the water as a time series function. Based on the result, the effectiveness of water-Al2O3 nanoparticles as cold fluid shows good agreement on heat transfer parameter enhancement. The heat exchanger effectiveness increase until 2.2% compare to that of heat exchanger without Al2O3 nanoparticles. This phenomenon indicates an increases of heat transfer process inside heat exchanger. The application of water-Al2O3 nanoparticles on shell and coiled tube heat exchanger enhanced the convective heat transfer passively.