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11.
Taking public transit facilities (PTFs) is the major transport style in Hang Kong. Human exposure to indoor air pollutants may cause adverse health effects to the passengers. Exposure assessment on air pollutants is important for the control of human diseases caused by indoor air pollution. In this paper, the indoor PM10,CO and C02 levels in various PTFs, such as public bus, subway, railway and ferry in Hong Kong, were measured. Combining with the time budget survey of Hong Kong population, the human exposures were calculated through Monte-Carlo simulation. 相似文献
12.
The contamination diffusion to the operating room when the door is open was simulated with a computational fluid dynamic (CFD) method,to give the extent of the contamination diffusion.The influence of the door-opening procedure was ignored since the door of the operating room is normally a sliding one.The flow field in the case of the 16 s course of opening the door was simulated.The simulated and the experimental results demonstrate that the extent of the contamination diffusion is around 1.5 m when there is no temperature difference between indoor and outdoor,and there is hardly any contamination diffusion when the temperature difference is 1 ℃.It can be concluded that the positive pressure difference in the operating room lost its function in preventing the contamination when the door is open.That the temperature of corridor is lower than that of operating room contributes to contamination control.Keeping 1 ℃ temperature difference between corridor and operating room and increasing positive pressure and air flow are suggested.It is more secure to set up an anteroom if persons come in or out of the operation room at the course of surgery. 相似文献