Methods for improving heat transfer in fin- tube heat exchangers
LI Ge, YU Gong-zhi, CHENG Mu -jun, ZHANG Dian-guang
1. Key and Open Laboratory of Aquatic Processing and Utilization of Liaoning Province, Dalian Fisheries Univ. , Dalian 116023, China; 2. Department of Food Precessing, Dalian Fisheries Univ., Dalian 116023, China; 3. Power Engineering Department of Dalian University of Technology, Dalian 116023, China; 4. School of Mechanical Engineering, Dalian Fisheries Univ. , Dalian 116023, China; 5. Dalian Maritime Safety Administrtion, Dalian 116001, China
Abstract: In order to optimize the structure of fin-tube heat exchangers, two methods was put forward in the paper. Under refrigeration condition, the spacing of fins was varied in the easily-frosted heat exchangers. Under air-conditioning condition, the thread pitch of the inner screw thread tubes was varied. The results have shown that the heat transfer coefficients in the two cases can be increased by 9.8%% and 3.82% respectively.
2006, Vol. 21 
