Comparative Study of Heat Transfer Performance of Twisted Tape Inserts in Evaporation of R407C

Abstract

Twisted tapes are more effective for enhancement of heat transfer within lower vapor quality region of 10% to 50% only. Twisted tape-III with twist ratio, y= 12 is the best heat transfer performer and twisted tape-II with twist ratio, y =10 is the second best heat transfer performer. In general, heat transfer performance of twisted tape depends on its geometry and operating conditions.