An Experimental Study on Effect of Twisted Tape on Performance of Plane Steel Tube and 55 Degree Corrugated Steel Tube Double Pipe Heat Exchanger

The main aim of this comparative analysis is to determine effectiveness, over all heat transfer coefficient and number of transfer unit(NTU) using a straight steel tube double pipe heat exchanger(DPHE) with respect to 550 corrugated steel be DPHE without anything insert and 550 corrugated steel be DPHE with insert twisted tape half and full length. In current work the fluid to fluid heat exchange is taken into consideration, Most of the investigations on heat transfer coefficients are for constant wall temperature or constant heat flux. The effectiveness, overall heat transfer coefficient, effect of hot water flow rate on effectiveness of heat exchanger when cold water mass flow rate is kept constant. Here studied and compared for parallel flow and counter flow DPHE arrangement of Straight steel tube and 550 corrugated steel be DPHE without anything insert and 550 corrugated steel be DPHE with insert twisted tape half and full length. All readings were taken at steady state condition of heat exchanger. The result shows in the graphical representation for effectiveness, LMTD, NTU and over all heat transfer coefficient for parallel flow and counter flow arrangement. Effectiveness of heat exchanger is decreases when mass flow rate of hot fluid is below 45LPH and then increases in straight steel and to 550 corrugated steel be DPHE without anything insert and 550 corrugated steel be DPHE with insert twisted tape half and full length when hot water mass flow rate varies and cold water flow is fixed at 45LPH