Volume : II, Issue : VI, June - 2013

Analytical Performances Evaluation of Compact Heat Exchanger Using Nano–fluids

Dr. Suwarna Torgal, Ashish Mishra

Abstract :

Researches in heat transfer have been carried out over the previous several decades, leading to the development of the currently used heat transfer enhancement techniques. Water and ethylene glycol as conventional coolants have been widely used in a compact heat exchanger for many years. These heat transfer fluids offer low thermal conductivity. With the advancement of nanotechnology, the new generation of heat transfer fluids called, “nanofluids” have been developed and researchers found that these fluids offer higher thermal conductivity compared to that of conventional coolants. This study is focused on the application of mixture of water (80%) and ethylene glycol (20%) based nanofluids (Cu, Sic, Al2O3, and TiO2) are presented in this article. Use of nanofluid as coolant in compact heat exchanger improves the effectiveness, cooling capacity with the reduction in pumping power. Effects of various operating parameters such as air inlet temperature, coolant inlet temperature, air and coolant mass flow rates, effectiveness, pumping power and exergy analysis are studied as well. SiC-80% H2O-20% EG (base fluid) yields best performance in compact heat exchanger having louvered fin geometry followed by Al2O3-base fluid, TiO2-base fluid and Cu-basefluid. The maximum cooling improvement for SiC is 18.36%, whereas that for Al2O3 is 17.39%, for TiO2 is 17.05% and for Cu is 13.41% as coolants and enhancement in second law efficiency for SiC is highest (21.89%) followed by Al2O3 (21.53%), TiO2 (21.3%), Cu (18.97%) nanofluids compare to base fluid as a coolant alone. Present study reveals that the nanofluids may effectively use as coolant in compact heat exchanger to improve the performance.

Keywords :

Article: Download PDF   DOI : 10.36106/ijsr  

Cite This Article:

Dr. Suwarna Torgal, Ashish Mishra Analytical Performances Evaluation of Compact Heat Exchanger Using Nano-fluids International Journal of Scientific Research, Vol : 2, Issue : 6 June 2013

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