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TECHNICAL PAPERS: Two-Phase Flow and Heat Transfer

Heat Transfer to Water-Oxygen Mixtures at Supercritical Pressure

[+] Author and Article Information
S. N. Rogak, D. Faraji

Department of Mechanical Engineering, University of British Columbia, 2324 Main Mall, Vancouver, BC, Canada, V6T 1Z4

J. Heat Transfer 126(3), 419-424 (Jun 16, 2004) (6 pages) doi:10.1115/1.1731329 History: Received February 07, 2003; Revised February 04, 2004; Online June 16, 2004
Copyright © 2004 by ASME
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References

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Japas,  M. L., and Franck,  E. U., 1985, “High Pressure Equilibria and PVT-Data of the Water-Oxygen System Including Water-Air to 673 K and 250 MPa,” Ber. Bunsenges. Phys. Chem., 89, pp. 1286–1274.
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Figures

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Phase diagram for the water-oxygen system at 25 MPa, as predicted by the RKS Equation of State 17
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Process diagram for the UBC SCWO pilot plant (above) and schematic of the first half of the test section (below)
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Measured heat capacity compared with the IAPWS correlation for water 12. Flow rate can be found from Table 1 for specified values of heat flux and oxygen content.
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Wall-bulk temperature differentials for low heat flux experiments (21 kW/m2 ) at 0.78 kg/min water flow
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Wall-bulk temperature differentials for moderate heat flux experiments (70 kW/m2 ) at 0.76–0.78 kg/min water flow
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Wall-bulk temperature differentials for high heat flux experiments (150 kW/m2 ). Water flow rate is 0.76 kg/min except as noted.
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Wall-bulk temperature differentials for high heat flux experiments (290 kW/m2 ) at over 2 kg/min water flow
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Summary of heat transfer coefficients as a function of oxygen content and heat flux. As shown in Table 1: experiments at 21, 70, and 150 kW were run with approximately 0.78 kg/min water flow, while the experiments at 290 kW/m2 were run at 2.04 kg/min.

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