The analysis of the possibility of use of nanofluid as the heat carrier for increase in efficiency of heat supply systems

Abstract

The article is about possibility of applying nanofluids in heat supply systems as a coolant. The most effective nanofluids were selected by analyzing the thermal conductivity, concentration, size, mass, and velocity of nanoparticles. It is presented the dependences of the heat transfer coefficient of a nanofluid on the Reynolds number and the heat transfer coefficient on the volume concentration. It has been calculated, that with the addition of 1% vol. of nanotubes to the coolant path that gives heat in the evaporating section of the heat pump, the heat transfer coefficient of a nanofluid increases by 100%, and with adding 2% vol. or 3% vol. by 200% and 300%, respectively. © 2019 Published under licence by IOP Publishing Ltd.