Post Experimental Analysis of Tube-In-Tube Helical Coil Heat Exchanger

Tube-in-tube helical coil heat exchangers consist of long, small diameter concentric tubes bent in the form of helix. Helical coil heat exchangers can be better choice in some cases such as, where space is limited, so that not enough straight pipe can be laid. Also, under conditions low flow rates where shell and tube heat exchanger would become uneconomical due to low heat transfer coefficients, the tube-in-tube helical coil heat exchanger can be proved economical. In this work only post experimental analysis is considered, which includes the variations of parameters such as curvature ratio, pitch of coil and its effects on heat exchanger and heat transfer coefficient. For experimentation water was used as working fluid. In this analysis, all the possible flow arrangements are considered such as parallel flow and counter flow.