Geometry fin performance in vacuum desalination system condenser tubes using low temperature

Abstract

This research is aimed to increase the condensation rate of the Vacuum Desalination System by adding 20 twisted fins on the condenser. On the first day, by comparing energy before and after using fins, it was found that the fins effectivity was improved by 119 J, whether on the second day is improved by 101 J. The condensation rate is obtained on the first day at 8.00 in Western Indonesia Time with only 0.000102 kg/s, while the rate reached the top at 12:28 Western Indonesia Time with 0.000233 kg/s. The average experiment for one day is 0.000171 kg/s. On the second day the condensation rate at 8.00 Western Indonesia Time is about 0.000101 kg/s with highest condensate rate at 12.22 Western Indonesia Time with 0.000231 kg/s. The average condensate rate for the second day is 0.000159 kg/s. The result indicates that the first day produced 1.27 L/day freshwater whether on the second day produced 1.47 L/day.