Nano coated heat exchanger surfaces - Theoretical simulation on thermal performance

Abstract

Energy and material-saving attentions, as well as financial and environmental encouragements, have directed to concerned exertions to produce more effectual heat-exchange kit. Air has heat transfer coefficients that are 100 times lesser than the waters. Prolonged exteriors are normally castoff in the heat switching devices for increasing the heat transfer between primary exterior and the surrounding fluid. Heat transfer increases by providing a prolonged surface to air sideways, rises weight of the system, hinder airflow, Upsurges pressure drip and Driving power to have the liquid stream flowing. The above main hitches will be minimalized with the assistance of current growths in the arena of nanoscience that delivers a path to enhance heat transfer by provided that of a coating with nanometer depth on heat exchanger surfaces. The current effort aims to examine the effect of the nanocoating on heat exchanger surfaces. Theoretical simulation using Monte Carlo method results shows that percentage increase in surface area is 46% for spacing between pin fins of 2 µm and 0.5% for 20 µm and the drag change is negligible for the above range of pin fin length.