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通风换气的新风年龄是评价室内空气品质的一个很重要指标,传统的测量和计算方法不能适用于越来越普遍采用的集中通风系统.通过分析空气在风道中的流动和多股空气混合时的新风年龄计算方法,给出了适用于集中通风系统新风年龄的计算方法和示例.该方法不需在各个房间之间进行迭代,只需依次求解即可一次得到所有房间和风道中的新风年龄值,并能适用于常见的各种集中通风系统.
The fresh air age of ventilation is a very important index to evaluate the indoor air quality, and the traditional measurement and calculation methods can not be applied to the more and more commonly used centralized ventilation system.Through analyzing the air flow in the air duct and multi-air mixture , This paper gives a calculation method and an example of the age of the fresh air for centralized ventilation system.The method does not need to iterate through the rooms and only needs to be solved sequentially to obtain the fresh air age value in all rooms and air ducts , And can be applied to a variety of common ventilation systems.