Parametric Investigations of Drying Roselle Calyces Flower

In this research, a new dryer which use halogen lamp must be designed and the drying performance of Roselle is to investigate. The power varied (50, 75, 100, 125, 150, 175, 200, 225) W. result shows that higher produce high temperature low humidity shorten time Roselle. rate each parameter slightly different pattern as does not constant since supply voltage or current. heat vaporization increase quantity energy raise at certain mass also increase. most suitable 200W colour degrade very much with short 240mins, heat, transfer coefficient 91.51 W/2K . Maximum has sour taste ordinarily utilized in readiness cold hot drinks needed 62⁰C 17.02 kJ are determined 2612.3 kJ/kg.