Preparing for drying products include chili, lemon grass, kaffir lime leaves. Then take the product to drying at a temperature of 60℃, the pressure in the drying chamber 0.1, 0.2 bar. The study was divided into two parts The first experiments in the of drying infrared vacuum dryer The two experimental products in the waste heat of water chiller system with infrared vacuum drying Data safe are drying. Measuring temperature in the drying chamber using Thermocouple type K Measuring Weight of produce by load cell and record the weight of every 10 minutes In order to calculate the rate of drying. Measuring the power consumption by using Meter measurement system of vacuum dryers. To calculate power consumption for drying Then compare the power consumption use of drying infrared vacuum dryer and waste heat of water chiller system with infrared vacuum drying.
The moisture ratio MR was determined from the equation