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Ventilation Optimization in Nuclear Power Plant Turbine Room

Author: FengZhen
Tutor: LiuGang
School: Donghua University
Course: Heating,Gas Supply, Ventilation and Air Conditioning Engineering
Keywords: Turbine Housing Airflow Numerical Simulation Building structure Inducing fan Similar model test Neutral surface
CLC: TU834
Type: Master's thesis
Year: 2010
Downloads: 75
Quote: 1
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Abstract


In the case of the world's growing energy shortages, China's energy situation is not optimistic, building energy efficiency to ease the energy shortage in China is of great significance. Nuclear power plant steam turbine room ventilation by mechanical air intake, the mechanical exhaust the program, making the investment costs and energy consumption greatly increased, so the guarantee process case, reasonable introduction of natural wind, natural ventilation mechanical exhaust ventilation combined with great significance. Arranged in the form of the nuclear power plant steam room there is a big difference and heat and thermal power stations, heat pipes and ancillary systems are many and complex, but the surface temperature is low. In this regard has not been associated design procedures, the design work produced confusion. Fuqing nuclear power plant steam room ventilation program and its various influencing factors to the present and future of such design projects to evidence-based commissioning party's request, the numerical simulation and optimization, and in accordance with the principle of similarity than to establish the kind of 1/20 model test station. Firstly, using CFD technology to simulate the original condition (natural ventilation, mechanical ventilation scheme) of the Fuqing nuclear power plant steam turbine room. Realizable k-ε turbulence model and DO radiation model numerical calculation on the flow and temperature fields of the turbine room, good agreement of the results obtained with the Qinshan Phase II Turbine Housing measured temperature, thereby verifying the numerical simulation is reliable 's. And on this basis can be distributed on the plant within the layers of air volume, Face average temperature, speed, and surface \layers of windows position, size; trench width; inducing fan settings and Selection) optimization direction. Simulation results show that: when the nuclear power plant steam turbine room with natural ventilation, mechanical exhaust ventilation program: roof fan pressure head 60Pa, from top to bottom layers into the windscreens than when 1:1.2:5.4:3.2 most economical and reasonable , and at this time should be to minimize 0m Layer C side window position and to increase the area of ??the side windows; trench width of 3m, the most economical and rational plant ventilation; inducing fan flow 860M to 3 / h, and is provided in the grid have heat The most obvious effect of the gate (or hanging objects hole) below 3.5m at. This result will not only be able to be directly used for the construction of a specific project, an important reference value for similar power stations and similar buildings ventilation programs, as well as the formulation of the structural parameters.

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CLC: > Industrial Technology > Building Science > Housing construction equipment > Air-conditioning, heating, ventilation,and its equipment > Ventilation, dust,air purification,dehumidification
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