-
Application
Food Preservation
-
Flavor
Maintained
-
Nutrients
Maintained
-
Microstructure
Smooth With Uniform Thickness
-
Anthocyanin Loss
Low
In Refractive Window Drying technology, drying of product is done using a thin, transparent infrared film which eventually forms a window for drying. The thin film is conveyed above a heated water tank which assures very low-temperature drying with rapidity, with all modes of heat transfer such as conduction, convection and radiation. As the product dries, however, the infrared window closes, effectively limiting heat transfer to the product to conduction. RW Drying is a new indirect contact drying technology that uses circulating hot water below boiling point as an effective heat transfer medium under atmospheric pressure. The energy or heat losses from the water to its surroundings occur by conduction, convection and radiation resulting in faster drying. During a trial, the process dried raspberry puree from 92% moisture to 2-4% moisture in just five minutes. The dried product had high bulk density. Product quality shows good results as compared to drum drying, freeze-drying, spray drying, tray drying, etc. while being extremely energy efficient. Advantages: Colour, Flavour and Nutrients of the product is maintainedMicrostructure of the product is smooth with Uniform ThicknessLow loss of Anthocyanin from the productHigher Bulk density and Low Porosity of the ProductNo Sulphites or Additives are needed to DryLow Product TemperatureShort Drying TimeEnergy Efficient Drying SystemLow Capital Expenditure compared to other Dryers