FREEZE DRYING-THEORETICAL CONSIDERATIONS AND APPLICATION

Abstract

The principles governing freeze-drying rates of heat and mass transfer have been reviewed and defined in practical terms. The various methods and resistances to heat transfer are discussed and practical use is made of the equations presented. Mass transfer through the various phase changes is discussed. Theoretical discussions of the mode of mass transfer at each step and suitable relationships are developed which describe the limiting conditions for the mass transfer rates. By use of the over-all mass transfer equations, rates of drying and total times required may be determined. Sample calculations illustrating the use of the relationships and theoretical considerations are included.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1961
Accession Number
AD0252412

Entities

People

  • Jackson O. Clancy Iii
  • Raymond M. Cartier
  • Thomas R. Dashiell

Organizations

  • United States Army Biological Warfare Laboratories

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Air Pressure
  • Diffusion Coefficient
  • Energy Transfer
  • Heat Energy
  • Heat Of Sublimation
  • Heat Transfer
  • Heat Transfer Coefficients
  • Latent Heat
  • Mass Transfer
  • Materials
  • Moisture Content
  • Partial Pressure
  • Pressure Measurement
  • Surface Temperature
  • Thermal Conductivity
  • Vapor Pressure
  • Water Vapor

Readers

  • Calculus or Mathematical Analysis
  • Combustion science or combustion engineering.
  • Gender and Food Studies