A Computer Model for Analysis of Dielectrically Enhanced Single-Zone Tunnel Dryers

Abstract

Dielectric heating was incorporated into the existing continuous single-zone convective dryer model. The energy balance equation for a control volume around the drying product was nondimensionalized, and the resulting dimensionless parameters were used to generate a unique characteristic drying curve and to define drying regimes for dielectrically enhanced drying. Numerical models were developed to represent the heat generation inside the wet product and the position of the evaporative front as a function of moisture content. The governing equations were modified to account for the thermal influence of vapor flux in the dry region. The enhanced computer code is capable of predicting the drying rate and temperature history for the product, and calculating the required dryer length, and the drying time for dielectrically enhanced drying. Keywords: Theses; Computer programs; Industrial heating.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1988
Accession Number
ADA196700

Entities

People

  • William Melendez

Organizations

  • Air Force Institute of Technology

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Air Force
  • Air Masses
  • Boiling Point
  • Electromagnetic Radiation
  • Energy
  • Heat Energy
  • Heat Of Vaporization
  • Heat Transfer
  • Heat Transfer Coefficients
  • Latent Heat
  • Phase Transformations
  • Regions
  • Surface Temperature
  • Temperature Gradients
  • Thermal Conductivity
  • Vaporization
  • Wet Bulb Temperature

Fields of Study

  • Agricultural and Food sciences

Readers

  • Computational Modeling and Simulation
  • Forest Ecology
  • Thermal Physics or Thermal Science.