Author : S. D. Chavhan, N. S. Gohel and R. S. Jha

Experimental investigation is carried out to study thermal-hydraulic performance of elliptic shape tube cross flow heat exchanger with staggered tube arrangement at 45˚angle of attack. The staggered tube arrangement is having longitudinal and transverse pitch equal. Hot water passed through the tubes at 45˚ angle of attack and cold atmospheric air flows over the tubes in a cross arrangement. Heat transfer takes place from hot water to cold atmospheric air by the mode of convection. Effect of different mass flow rate of air on convective heat transfer coefficient, Reynolds number, Prandtl number and heat transfer would be calculated. Effect of using elliptic shape staggered tube arrangement at 45° angle of attack would be compared with Zukauskas correlation for circular staggered tube bank arrangement.

Keywords: Elliptic shape tube, Angle of attack, staggered tube arrangement, friction factor, convective heat transfer coefficient.