抄録
The plane fin of a cross-finned tube heat exchangers is the basis for all kinds of fins used in air conditioners. In this paper, an improvement the dimensionless arrangements of pressure drop for plane fins was attempted.
The detailed calculation results for all geometrical parameters, especially tube disposition, showed the reflecting to the effect of contracted flow in the existing equations of friction factor is insufficient. Therefore, an amendment for these equations was suggested. Further, the analogy between the revised friction factor and the Colburn's j factor was verified. In addition an approximate expression for the fin efficiency using wide parameters was devised.
