Numerical Simulation On Air Distribution In Convention Island Turbine Machine Room Of Fuqing Nuclear Power Station

In the global energy short situation,our country’s energy condition is day by day unoptimistic.As a result of large-scale development of alternative energy sources, considered questions and so on national security,energy security,environmental safety,the petroleum and the natural gas the more dependent international markets, the coal-burning electricity generation will be getting bigger and bigger to the environment pressure,the hydro-energy development’s potential will be also getting fewer and fewer,nuclear energy development in China’s important position is crystal clear,simultaneously a higher requirements will be put forward to the comprehensive,coordinated and sustainable development proposes of the Chinese nuclear power industry.There is big difference between the nuclear power station and the thermal power station on turbine machine room ’s arrangement form and the calorific capacity.At present there is not yet related the design regulations and cause the puzzle in the project work.In order to make present’s design project can achieve the goal,that is,ventilation system arrangement to be reasonable,the investment will save,the movement will be economical,the entrusting party plans to carry on the numerical simulation on air distribution in turbine machine room of Fuqing nuclear power station,which will thus provide the reference for the next related regulations’ compilation,also will provide for the later similar project uses for reference.In this paper,the standard three-dimensional k-εstwo-equation turbulence model which modifies the item of buoyant effect and SIMPLE algorithm are adopted,wall functions are used to deal with the boundary condition.Author makes use of CFD software to study the air distribution of Fuqing nuclear power station turbine machine room,emphatically has conducted the research to the main workshop’s well ventilated plan as well as each floor’s ventilation grille’s distribution.Through the numerical simulation computation,a ventilation program that suitable for the actual project was proposed,and different operating conditions of the selected program were studied.Then the velocity field and the temperature field of the workshop was made a analysis contrast,which caused by different ventilation grille size,quantity and the ventilation grille arranged in the workshop,through which obtained the best arrangement of ventilation grille and provide the basis to the design and movement in practice.The conclusion of the thesis is not only useful to this project,but also can provide important reference to the decision-making of ventilation project on congeneric hydropower station and congeneric building.