Influence of System Variables on the Heating Characteristics of Water during Continuous Flow Microwave Heating
Joint Authors
Lin, Manguang
Ramaswamy, Hosahalli S.
Source
International Journal of Microwave Science and Technology
Issue
Vol. 2011, Issue 2011 (31 Dec. 2011), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2011-10-29
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Abstract EN
A domestic microwave oven (1000 W) was modified to permit the continuous flow of liquids run through a helical coil centrally located inside the oven cavity.
Heating characteristics were evaluated by measuring inlet and outlet temperatures of coil as a function of system variables.
The influence of number of turns, coil diameter, tube diameter, pitch and initial temperature were evaluated at different flow rates.
The average residence time of water was computed by dividing the coil volume by the volumetric flow rate.
The influence of Dean number was evaluated.
Results from this study showed that (1) higher number of turns resulted in lower heating rate, lower temperature fluctuations, higher exit temperature and longer time to achieve temperature equilibrium; (2) larger tube or coil diameter gave larger coil volume causing the heating rate to decrease; (3) faster flow rates resulted in lower exit temperatures, lower temperature fluctuation, higher Dean number and slightly higher heating rate; (4) higher initial temperatures resulted in higher exit temperatures; (5) higher Dean number resulted in more uniform heating and slightly higher heating rate.
Overall, the coil volume was the more dominant factor affecting heating rate as compared with flow rate and Dean number.
American Psychological Association (APA)
Ramaswamy, Hosahalli S.& Lin, Manguang. 2011. Influence of System Variables on the Heating Characteristics of Water during Continuous Flow Microwave Heating. International Journal of Microwave Science and Technology،Vol. 2011, no. 2011, pp.1-10.
https://search.emarefa.net/detail/BIM-458637
Modern Language Association (MLA)
Ramaswamy, Hosahalli S.& Lin, Manguang. Influence of System Variables on the Heating Characteristics of Water during Continuous Flow Microwave Heating. International Journal of Microwave Science and Technology No. 2011 (2011), pp.1-10.
https://search.emarefa.net/detail/BIM-458637
American Medical Association (AMA)
Ramaswamy, Hosahalli S.& Lin, Manguang. Influence of System Variables on the Heating Characteristics of Water during Continuous Flow Microwave Heating. International Journal of Microwave Science and Technology. 2011. Vol. 2011, no. 2011, pp.1-10.
https://search.emarefa.net/detail/BIM-458637
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-458637