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The transient heat transfer between working fluid and inner wall of 600 MW supercritical pressureboiler’s water separator model during start-up was experimentally explored. The test conditions forwater steam two-phase were as follows: pressure P = 3 ~ 11 MPa, mass now M = 0.2 ~ 0.35 kg/s,and mass quality x = O.2 ~ 0.8; for subcooled water P = 3 ~ 11 MPa, M = 0.2 ~ 0.35 kg/s, andsubcooled degree △θ = 10℃. By using an accurate and tractable inverse heat conduction solution,the correlations of single phase and twouphase transient heat transfer coefficients were obtained. Theexperimental results demonstrated the heat transfer enhanced for subcooled water and water steammixture compared with fully developed turbulent flow in tube. The increasing heat transfer effect maybe attributed to the deformation or destruction f the boundary layer.
The transient heat transfer between working fluid and inner wall of 600 MW supercritical pressureboiler’s water separator model during start-up was experimentally explored. The test conditions for water steam two-phase were as follows: pressure P = 3-11 MPa, mass now M = 0.2 to 0.35 kg / s, and mass quality x = 0.2 to 0.8; for subcooled water P = 3 to 11 MPa and M = 0.2 to 0.35 kg / s, and subcooled degree Δθ = 10 ° C. By using an accurate and tractable inverse heat conduction solution, the correlations of single phase and twouphase transient heat transfer coefficients were obtained. Theexperimental results demonstrated the heat transfer enhanced for subcooled water and water steammixture compared with fully developed turbulent flow in tube. The increasing heat transfer effect maybe attributed to the deformation or destruction f the boundary layer.