Prediction of critical heat flux on surface under boiling in case of IVR-ERVC by using CFD simulation

The efficacy of in-vessel through external reactor vessel cooling (IVR-ERVC) is strongly correlated with the critical heat flux (CHF) on the lower head of reactor pressure vessel (RPV). The high limit of CHF prevents the RPV from failure by extracting much heat out of the vessel through the circulat...

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Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2019-07, Vol.576 (1), p.12042
Main Authors: Urfa, Rasool, Lu, Daogang, Asran, Noor Farooq, Munib, Ansari, Aazim, Rasool
Format: Article
Language:English
Subjects:
Boiling
Deionization
Diameters
Heat flux
Heat transfer
Mathematical models
Pressure head
Pressure vessels
Radius of curvature
Working fluids
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Summary:The efficacy of in-vessel through external reactor vessel cooling (IVR-ERVC) is strongly correlated with the critical heat flux (CHF) on the lower head of reactor pressure vessel (RPV). The high limit of CHF prevents the RPV from failure by extracting much heat out of the vessel through the circulation of working fluid in external flow channel. In present study, the deionized water is allowed to flow through curved flow channel having radius of curvature of 368mm and hydraulic diameter of 40mm with square cross-section. The heat flux of 1500kWm−2 is applied perpendicular to the convex wall of the channel. The CHF on the wall of flow channel has been predicted by incorporating CFD based two-phase (liquid-vapor) boiling model. The investigations on spatial variation of pressure, temperature, and velocity and heat flux acquired as a result of numerical simulations have been discussed in detail. The CHF and average HTC is predicted as 1.798e+04kWm−2 and 38.981kWm−2K−1 respectively.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/576/1/012042