摘要：For responding the policy call of building a green and low-carbon society and meeting the goal of economizing energy and reducing emission in the process of construct. The troditional ceiling-exhaust ventilation system in restroom should be replaced by the new low-level wall-exhaust ventilation system for better exhaust effect and less air changes per hour which help in solving the existing problems, such as excessive design value of air changes per hour, serious heating/cooling loss and so on. The optimal interval of air change rate corresponding to the low-level ventilation system is analysed here based on the national health standards. The models of restroom with the new low-level wall-exhaust ventilation system are established by SketchUp software, and the air distribution in the restroom is simulated by Computational Fluid Dynamics software. The analyses of simulation results show the new prefabricated underneath ventilation system can display competently when the air change rate between 10 and 15 times, which reduce about 50% energy compared with 20 air change times in the traditional ventilation system design.
关键词：low-level wall-exhaust ventilation system;air changes per hour;CFD simulation;low-carbon
