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Evaporation rates in spray drying
The Canadian Journal of Chemical Engineering, 1964AbstractThe rate of evaporation of pure water droplets in a co‐current spray dryer was investigated. It was found that the relative motion between the droplet and the air stream is of significant importance in the determination of the rate of heat and mass transfer.
A. K. Bose, D. C. T. Pei
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Rates of Dry Deposition Determined Using Wet/Dry Collectors
Journal of Geophysical Research: Atmospheres, 1985Daily samples of dryfall were collected during the June 1982 Dry Deposition Measurement Intercomparison Study at Champaign, Illinois, using six Aerochem Metrics wet/dry collectors. Upon completion of the field experiment, these samples were analyzed at the Environmental Measurements Laboratory for pH and for their concentrations of major inorganic ...
H. W. Feely +3 more
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Freeze-Drying Mechanisms and Drying Rates Under Various Drying Conditions
1985Freeze-drying rates of relatively homogeneous frozen materials and frozen particles in a shallow tray by radiative and conductive heating are studied both experimentally and theoretically. The drying mechanism of frozen materials of which initial ice content is less than 1.0 is quite different from the flat plane sublimation, which was found previously
Masashi Asaeda, Masanobu Hara
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Evaporation rates in spray drying
The Canadian Journal of Chemical Engineering, 1960AbstractHeat and mass transfer coefficients have been determined during the evaporation of water sprays produced by pneumatic atomizing nozzles in a vertical, cocurrent spray dryer, 8‐in. in diameter and 14 ft. high, under various operating conditions.
J. Dlouhy, W. H. Gauvin
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Measurement of lyophilisation primary drying rates by freeze-drying microscopy
Chemical Engineering Science, 2003Abstract The mass transfer processes that influence the rate of primary drying during lyophilisation are characterised by freeze-drying microscopy. A simple diffusion model is shown to describe the observed progress of drying fronts through isothermal, one-dimensional systems of slab and cylindrical geometry.
S. Zhai +3 more
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Calculation of Moisture Content and Drying Rate during Microwave Drying
Applied Mechanics and Materials, 2013Convectional dryerswork at high temperature and usually lead to loss of quality for sensitivebiomaterial products (especially in nutrition). In this way the researchersfound the microwave power more effective and suitable for drying processes. Someof microwave drying advantages include the following: short drying time, highquality of product, low ...
Samad Khani Moghanaki +2 more
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Study on drying rate in contact drying with flexible screen
Journal of Forestry Research, 2000The moisture contents (MC) of popular veneers were tested in Composition Board Laboratory of Northeast Forestry University by contact drying with flexible screen. The influence factors considered included temperature, initial moisture contents (IMC), and veneer thickness. Veneer-drying laws under different hot press conditions were analyzed.
Wang Weihong, Lu Renshu, Zhang Xianquan
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Drying rate control in the middle stage of microwave drying
Journal of Food Engineering, 2011Microwave drying of apples at constant temperatures follows typical drying curves. The middle stage of the drying process shows a faster drying rate and accelerated moisture evaporation. Meanwhile, more flavors are lost, surface color is degraded, and charring often occurs in this stage.
Zhenfeng Li +3 more
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Drying wheat in two foot beds I: Rate of drying
Journal of Agricultural Engineering Research, 1968Abstract The rates of drying of 83 beds of freshly harvested wheat are reported. Each bed, 2 ft deep, was dried from either 35 or 45 to 13·6% m.c. (d.b.) by parallel through-flow, heated air. Typical progress of drying data are given. The effects of changes in the rate of flow and the temperature of the drying air on drying rate are analysed ...
R.G. Clark, W.J. Lamond
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Investigation of freeze–drying sublimation rates using a freeze–drying microbalance technique
International Journal of Pharmaceutics, 2004This study was to investigate the effects of different freeze-drying factors on the rate of sublimation. The experiments were carried out in a custom-built freeze-drying microbalance to accurately monitor the sample temperature and control the chamber pressure.
Jun, Xiang +3 more
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