METHOD OF MANUFACTURE AN ENHANCED HEAT TRANSFER SURFACE AND APPARATUS FOR CARRYING OUT THE METHOD

摘要

An apparatus and method for producing a high performance evaporator tube (10) having a subsurface channel (16) formed between adjacent helical fins (12) with the subsurface channels (16) having alternating closed portions and open pores above the subsurface channels (16). The fins (12) of the tube (10) are rolled-over toward the adjacent fin (12) and then contacted with a notched disc (28) to form the alternating closed portions and open pores.