Design and control of energy efficient drying processes with specific reference to foods
Progress made between January 1, 1988 and April 1, 1988 is described. With regard to Task 10 (Revision of Drying Models), phase one test data was reanalyzed in an effort to determine the effect of a total pressure driving force. Progress on Task 11 (Dryer Studies) included reassembly of the laboratory dryer developed in phase one. A laboratory scale vacuum tray dryer was constructed and several test runs were conducted on the dryer. The tray dryer will be used to simulate drum drying conditions. Progress on Task 12 (Food Quality Studies) included completion of a model to describe the rate of nonenzymatic browning in a non-fat dried milk as a function of moisture content and temperature. Dryer models and control schemes which are presently used in industry were reviewed as part of Task 13 (Recommendations/Strategies for Dryer Design and Control). In batch type convective air dryers, there is room for dryer control improvement without introducing much difficulty. The results from fundamental studies of the drying mechanisms need to be applied. For continuous dryer controller design, use of an empirical approach for equilibrium moisture content and thin layer dryer modelling is preferable. Existing models for continuous dryers are not directly applicable to controller design. It is believed that a certain compromise should be achieved between model prediction accuracy and the ease of application for controller design if a better control scheme is to be designed for continuous dryers. Progress was made on Task 14 (Moisture Mobility and Interaction in Foods). Application of the BET theory to measure the internal surface area of pasta was investigated. 33 refs., 23 figs.
- Research Organization:
- Purdue Univ., Lafayette, IN (USA)
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (USA)
- DOE Contract Number:
- FG07-85ID12608
- OSTI ID:
- 5884974
- Report Number(s):
- DOE/ID/12608-T13; ON: DE91010715
- Country of Publication:
- United States
- Language:
- English
Similar Records
Design and control of energy efficient drying processes with specific reference to foods
Design and control of energy efficient drying processes with specific reference to foods
Related Subjects
FOOD INDUSTRY
DRYING
FOOD PROCESSING
ENERGY EFFICIENCY
CONTROL
DESIGN
DRYERS
PROCESS CONTROL
PROGRESS REPORT
VACUUM SYSTEMS
DOCUMENT TYPES
EFFICIENCY
INDUSTRY
PROCESSING
320303* - Energy Conservation
Consumption
& Utilization- Industrial & Agricultural Processes- Equipment & Processes