THE INFLUENCE OF WIRE PITCH TO THE WIRE AND TUBE HEAT EXCHANGER EFFICIENCY IN FREE CONVECTION
DOI:
https://doi.org/10.21831/jps.v21i2.13005Keywords:
heat exchanger efï¬ ciency, pitch of wire, wire and tube heat exchanger, free convectionAbstract
Wire and Tube heat exchanger consists of coiled tube and wire sticked on the two sides of it in normal direction of the tube. The ability of this heat exchanger to dissipate heat is shown by the overall surface efï¬ ciency from array of ï¬ ns or called as heat exchanger efï¬ ciency. The wire which functions as a ï¬ n is the expansion of the outer surface of tube, so that it expands the surface of free convection heat transfer and transfers heat from the heat exchanger to the outside surroundings. The ï¬ n efï¬ ciency commonly depends on its material, geometry and environment where it is used. In this research, the infl uence of the wire pitch to the heat exchanger was examinated. Tthree designs of the heat exchanger with different wire pitch namely (pw/Lw = 0.015; pw/Lw = 0.029 dan pw/Lw = 0.044) were tested into ï¬ ve levels of entrance fl uids temperature (40, 50, 60, 70, and 80 0 C). The ï¬ nding of this study was that the heat exchanger pw/Lw = 0.029 evenly produced the highest efï¬ ciency.
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