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Distribution of Vapor Pressure in the Vacuum Freeze‐Drying Equipment [PDF]
Mathematical Problems in Engineering, 2012 In the big vacuum freeze‐drying equipment, the drying rate of materials is uneven at different positions. This phenomenon can be explained by the uneven distribution of vapor pressure in chamber during the freeze‐drying process. In this paper, a mathematical model is developed to describe the vapor flow in the passageways either between material plates
Shiwei Zhang, Jun Liu
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Jurnal Teknik Pertanian Lampung, 2022 This study aims to examine freeze drying techniques and the effect of freeze drying techniques on the quality of freeze-dried strawberries. The material used are strawberries obtained from farmers in Lembang, West Bandung Regency, Bandung.
Rokhani Hasbullah, Nuzul Syah Putra
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Freeze-drying (lyophilisation) cycle recipe
, 2023 Example freeze-drying cycle recipe showing the set values for the shelf temperature and the chamber pressure. The condenser temperature is not shown but would be to typically set to −75 °C before the application of the vacuum that initiates the drying ...
Geoff Smith (6064268)
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Monitoring of the primary drying of a lyophilization process in vials [PDF]
, 2009 An innovative and modular system (LyoMonitor) for monitoring the primary drying of a lyophilization process in vials is illustrated: it integrates some commercial devices (pressure gauges, moisture sensor and mass spectrometer), an innovative balance and
Galan, M. +9 more
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Using of exhaust gas heat from a condenser to increase the vacuum freeze-drying rate
Results in Engineering, 2022 Vacuum freeze dryer is able to remove some of the moisture content of the material. However, the drying rate is very slow because the sublimation process must propagate through the layers of material.
Ansar +4 more
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Effects of drying methods on the quality and microstructure of Armillaria luteo-virens
Shipin yu jixie, 2022 Objective: This study aimed to determine the most suitable drying method for Armillaria luteo-virens. Methods: The effects of solar drying, hot air drying, vacuum-freeze drying, vacuum drying and microwave-hot-air combined drying on the nutrition ...
MENG Di +4 more
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Researches on Vacuum Freeze-Drying
Bulletin of JSME, 1972 The rate of sublimation dehydration by the process of Vacuum freeze-drying was investigated after our former reports on the researches of sublimation of ice. Analyses of the temperature distribution in the sublimating materials by numerical methods and of the ideal drying-characteristics were presented. In the above analysis, the rate-determining steps
KATAYAMA, KOZO, HAYASHI, YUJIRO
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Effects of Three Drying Methods on Drying Quality of Mu-jujube at Different Harvest Periods
Shipin gongye ke-ji, 2023 In order to make full use of jujube resources and further explore the processing and utilization value of jujube fruit, the changes of jujube nutrition, color and quality indexes after natural drying, hot air drying and vacuum freeze-drying in different ...
Jianchun SHI +5 more
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The drying of foods using supercritical carbon dioxide [PDF]
, 2010 Food drying techniques such as air and freeze drying are not ideal: high temperatures used during air drying result in degradation of nutrients and sensorial properties, while freeze drying is expensive and therefore only applicable to high value foods ...
Brown, Zoe Katherine
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Scientia Agropecuaria, 2010 The aim of this study was to compare the loss of chalarina vitamin C after applying four methods of dehydration: vacuum osmotic dehydration combined with convective drying, convective drying, osmotic dehydration combined with vacuum freeze-drying, and ...
Judith Castañeda +3 more
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