Abstract
During the dry season, several areas in Indonesia experience drought.Communities in some areas have difficulty getting clean water.One solution to overcome this problem is to use a machine that produces water from the air.This machine works by utilizing the evaporator as a component to condense water vapour from the air.Nevertheless, this machine could produce less water so far.Therefore, this machine was investigated by varying the diameter of the evaporator pipe.The purpose of this study was to determine the effect of the diameter of the evaporator pipe on the mass of water production.This research was conducted experimentally.This machine worked using refrigerant R134a with vapour compression cycle.The variation in this study was the diameter of the evaporator pipe, namely 10 mm, 8 mm and 6.35 mm.The results showed that there was no trend of the water production respecting to the pipe diameter.The machine worked well, and the highest COP of 11.82 was found in the diameter of 8 mm.The highest total heat absorbed by the evaporator from the air of 74.84 W was attained using machine having pipe diameter of 8 mm.The mass of water production obtained was 0.44 kg at the pipe diameter of 8 mm.