Executive SummaryHybrid vacuum drying combines reduced-pressure evaporation with more than one energy-delivery or material-renewal mechanism. Examples include contact plus microwave, infrared plus microwave under vacuum, and conductive heating plus mechanical agitation.Vacuum lowers the saturation t
Executive SummaryAn infrared vacuum dryer combines radiant infrared (IR) heating with reduced-pressure drying. Infrared emitters transfer electromagnetic radiation to the product; absorbed radiation is converted to heat near the product surface and, depending on wavelength and material optical prope
Executive SummaryRadio-frequency vacuum drying (RFV) combines a radio-frequency alternating electric field with reduced-pressure evaporation. A product is exposed to a field between electrodes; dielectric loss converts some electromagnetic energy into heat within the product.Vacuum lowers the satura