TITLE:
Experimental Study & Heat Transfer Analysis on Copper Spiral Heat Exchanger Using Water Based SiO2 Nanofluid as Coolant
AUTHORS:
Suman Shah, K. Kiran Kumar
KEYWORDS:
Spiral Heat Exchanger, Nanofluid, Sonification, Effectiveness, Nusselt Number
JOURNAL NAME:
World Journal of Nano Science and Engineering,
Vol.8 No.4,
December
6,
2018
ABSTRACT: Heat exchangers have its major application in
automobile, air condition, refrigerator, power plants, and many others. Heat
transfer characteristics and performance of Copper spiral heat exchanger are
investigated and compared with pure water. Nanofluid can enhance
thermos-physical properties. Experiment is carried out for water based SiO2 Nanofluid with 15 nm average sized
nanoparticle at varying air velocity and mass flow rate of fluid to investigate
its effect on heat transfer coefficient. From the experimental data, a closed
form solution for Nusselt number has been calculated using ∈-NTU method. A new correlation has been proposed as
a function of Reynolds number and Prandtl number. The heat transfer rate,
effectiveness, has been significantly higher compared to pure water and with increasing volume fraction of nanoparticles.