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Journal of Microwave Power
and Electromagnetic Energy (JMPEE) |
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TITLE |
Design
of a Measurement System for Temperature Distribution in Continuous Flow
Microwave Heating of Pumpable Fluids Using Infrared Imaging and Fiber Optic
Technology [PDF] |
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AUTHORS |
N. M. Gerbo, D. Boldor, C. M. Sabliov 2008 42 1 55-65 |
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Abstract Continuous microwave heating has
the potential to revolutionize processing operations in which high energy
densities per unit volume are required. The adoption of microwave heating for
large scale commercial application has been hampered by a lack of reliable
information on the temperature distribution during heating of pumpable
fluids. This study represents an initial attempt to design a system that
quantifies the temperature distribution during continuous microwave heating
and its relationship with processing tube surface temperature distribution.
The novel measurement system designed consisted of a semi-rigid thin axial
support system on which fiber optic probes were attached at different lengths
in the microwave heating cavity. Inlet, outlet and in-line longitudinal
temperatures were monitored during continuous flow microwave heating (1.5 kW,
2.5 kW, 3.5 kW, and 4.5 kW) of water of three different salinities (0 ppt, 15
ppt, and 30 ppt) at a flow rate of 1.6 l/min. Inlet and exit temperatures
were measured using standard thermocouples; in line temperatures were
determined using fiber optic temperature probes. The surface temperature
distribution of the applicator tube was measured using an infrared camera.
Results showed that fiber optic-based internal temperatures were Keywords: Continuous microwave heating, temperature measurements, fiber optic |
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