Nae-Hyun Kim
Department of Mechanical Engineering, Incheon National University, Incheon 406-772, Republic of Korea
M.-G. Go
Department of Mechanical Engineering, University of Incheon 12-1, Songdo-Dong, Yeonsu-Gu,
Incheon 406-772, Korea
Ho-Seung Han
School of Mechanical System Engineering, Incheon National University, 12-1,
Songdo-Dong, Yeonsu-Gu, Incheon 406-772, Republic of Korea
In the present study, seven titanium corrugated tubes (22.2 mm O.D and 0.5 mm tube thickness) having a range of corrugation pitch (from 6.4 mm to 22.1 mm) and corrugation depth (0.2 mm to 0.6 mm) were tested at the steam pressures (from 5 kPa to10 kPa) of an actual electric utility condenser. For the present range of corrugation geometry, the condensation heat transfer coefficient increases as corrugation pitch and corrugation
depth decreases. The maximum heat transfer coefficient was obtained for the tube having 6.4 mm corrugation pitch and 0.2 mm corrugation depth. The enhancement ranged 57% to 75%. Mehta and Raja Rao [27] correlation predicted the present data within ±15%.