TENG Minhua, HU Qing, WAN Li, et al. Calculation and analysis on hydrodynamic characteristics of an ultra-supercritical unit boiler with 1000MW broad regulation load[J]. Thermal power generation, 2019, 48(4): 60-67.
TENG Minhua, HU Qing, WAN Li, et al. Calculation and analysis on hydrodynamic characteristics of an ultra-supercritical unit boiler with 1000MW broad regulation load[J]. Thermal power generation, 2019, 48(4): 60-67. DOI: 10.19666/j.rlfd.201809193.
According to the structural character of an ultra-supercritical 1 000 MW unit boiler with high frequency and broad regulation load
the water system can be equivalent to a network system consisting of flow circuits
pressure grids and connecting tubes. On the basis of the mass conservation equation
momentum conservation equation and energy conservation equation
the hydrodynamic calculation model of water wall of the ultra-supercritical vertical tube coils boiler is established. By using the Newton's chord cutting method
the nonlinear model is solved
and the mass flux distribution
outlet vapor temperatures and metal temperatures at BMCR
75%THA and 30%THA load are obtained. The results show that
the temperature of the wall and fin is within the allowable range of materials and the water wall of the ultra-supercritical vertical tube coils boiler is safe and reliable in hydrodynamic aspect. The water wall will not flow instability at 30% THA load.