CFD Simulation Of Air-Distribution In Underground Main Plant Room Of Dagangshan Hydroelectric Station

Favorable air-distribution and thermal-humid condition in the underground hydroelectric station plant room is essential for operation of generators. In the past, model experimental methods were used to predict the air-distribution and thermal-humid condition in design stage. In this thesis, CFD technology is used to simulate indoor velocity field, temperature field and moisture field.In this thesis, two HVAC schemes, original scheme and optimized scheme, were adopted. By contrasting and analyzing simulated results of velocity, temperature and humidity of two HVAC schemes, merits and drawbacks of two schemes were observed. It is indicated that two schemes can both provide the thermal-humid condition of underground hydroelectric station plant. However the optimized scheme can reduce the air flow rate, and make for energy conservation. So, optimized scheme is recommended.This thesis verifies that CFD method can describe thermal-humid condition of the underground hydroelectric station plant room more directly and precisely than conventional method, and can make ventilating and air conditioning scheme more rational.