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Date of Publication:2017-01-01

Journal:中国电机工程学报

Volume:37

Issue:3

Page Number:819-825

ISSN No.:0258-8013

Abstract:Experimental study on the heat transfer and flow resistance
   characteristics of supercritical pressure water in a sub-channel of
   SCWR, which was simulated by a vertical quasi-quadrilateral channel, was
   conducted at the pressures of 23~28 MPa, mass fluxes of 700~1300
   kg/(m~2?s) and heat fluxes on the inner wall surface of 200~1000 kW/m~2.
   Experimental results showed that the obvious heat transfer differences
   exist in the circumferential direction of quasi-quadrilateral channel
   due to the flow blocking effect. The heat transfer is better at the
   sub-channel center than that at the narrow gap. The system parameters of
   heat flux, pressure and mass flux have great effects on heat transfer
   and flow resistance, and most of these effects are associated with the
   strong variations of thermo-physical properties of supercritical water.
   Five heat transfer correlations have been assessed with the current set
   of database, and it was found that the correlations of Mokry gives the
   best predictions of Nusselt number for the flow channel. Based on the
   form of Mokry correlation, a new empirical heat transfer correlation was
   developed to improve the predicted accuracy.

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