Research And Application Of Numerical Simulation Of Condenser Of Power Plant

As an important part of power units, the performances of condenser have a big impact on the economy and safety of the whole system. So people tried their best to study, develop and design condensers with more rational configuration and higher efficiency. Numerical simulation has become one important method to study the steam flow and heat transfer inside the condenser and design tube bundles' configuration due to the large volume and complex steam flow and heat transfer. The paper deduces the N-S equations amended by porous medium model and establishes numerical model of the condenser, points out how to deal with the distribution of resistance and mass convergence in the model. The paper simulates N-16300-1 condenser with the model mentioned above. Through the analysis of steam flow and heat transfer in the shell-side of the condenser, we get the speed field, pressure field, atmosphere concentration distribution and heat transfer coefficients distribution of the steam. According to the simulation results, we find some illogical defects of the configuration, which induced the assemblies of so much air and inhibit the steam flow and heat transfer. Then the paper gives some advices to betterment the condenser. The numerical simulation of the reconstructed condenser proved what we suggested improves the heat exchange greatly.Besides the paper simulate and analyze the condenser's operation in varying duty, which tell us the details of the steam flow and heat transfer processes in four conditions. This would help to deal with the problems happened in varying duty operations.In the last, we change the configurations of N-16300-1 condenser's tube bundles based on the same heat exchange areas. Compared with the former one, the simulation and calculation of the new condenser show more logical steam flow and higher heat transfer coefficient. This would provide a efficient method to study impacts over steam flow and heat transfer by tube bundles disposal. Besides, this is also helpful for the condenser design.