Ventilation Optimization In Nuclear Power Plant Turbine Room

In the global context of growing energy shortages, China's energy situation is not optimistic, Building energy efficiency has great significance to China's energy shortage problem. At present nuclear power plant turbine room is still the major using of mechanical ventilation inlet, mechanical ventilation of this program and Making the investment cost and energy consumption greatly increased. So In ensuring that meet the technical requirements, the rational introduction of natural wind, using natural and mechanical ventilation inlet combination of ventilation is of great significance.The layout of the form of nuclear power plant turbine room is different from power plant. In the nuclear plant, thermal piping and auxiliary systems are many and complex, but the surface temperature is lower than the thermal power station. At present in this area have not yet has the relevant design rules, so that designing works produced confusion. In order to making the current and future projects can be of such evidence-based. The commissioning party at the request of Fuqing nuclear power plant turbine room ventilation plan and its various types of impact factor of Numerical Simulation and Optimization Research. At the same time, in accordance with established principles of similarity than the 1 / 20 of the physical model test sets.In this paper, using CFD technology, Fuqing nuclear power plant turbine room the original condition (natural inlet, mechanical ventilation program) conducted a numerical simulation. Using Realizable k-εturbulence model and DO radiation model of the turbine room of the flow field and temperature field in the numerical calculation, the results obtained with the measured temperature of the Qinshan two turbine room in good agreement, thus validate the correctness of the numerical simulation is effective and reliable. And on this basis through the layers of mass flow inside the plant, working face an average temperature, velocity distribution, "the neutral surface" position, the vertical temperature distribution, the analysis of non-uniform coefficient of the best drawn into the wind plant as well as the structural parameters (all layer of the window location, size; trench width; inducing fan settings and the selection) in the direction of optimization.Simulation results show that: When the nuclear power plant turbine room with natural inlet, mechanical exhaust ventilation program. When the ventilation mass flow rate is 899.1kg / s, the result is most reasonable; when each floor's windows face ratio is ,ventilation is most reasonable in the working areas, and at this time should be reduced 0m Layer C side windows' position; Trench width of 3m, the plant ventilation is the most economical and reasonable; when fan-induced flow is 860m~3/h,and being set up a heat source at the bottom of the grill(or swap goods hole) below the 3.5m of the floor, the effects of ventilation is most reasonable.In this paper, the results can be directly applied not only specific projects, for similar power plants and similar buildings ventilation and structural parameters of the program formulation has important reference value...