Hot Air Dryer with Closed – Loop Oscillating Heat Pipe with Check Valves for Reducing Energy in Drying Process

This research was studied to saving energy of hot air dryer with closed-loop oscillating heat pipe (CLOHP/CV). The CLOHP/CV made from a copper tube with inner diameter of 2 mm. The evaporator and condenser lengths were 18 cm. The adiabatic length was 20 cm. Distilled water with 50% by total volume of tube was filled into CLOHP/CV. The number of meanderings was 40. The temperature for testing was 50, 60, 70, 80 and 90 oC. The hot air flow rate was 0.5, 1.0 and 1.5 m/s. The results of the normal hot air dryer and the hot air dryer with CLOHP/CV, it was found that the hot air dryer with CLOHP/CV can save thermal energy more than the normal hot air dryer. Moreover if determine in saving electrical energy, the hot air dryer with CLOHP/CV can save energy more than the normal hot air dryer by average of 28.13%.