不同自然通风方式室内热舒适性研究

采用数值模拟方法对自然下部通风、自然层状通风、自然顶部通风3种自然通风方式室内温度场和速度场进行研究,以获取3种自然通风方式中室内热舒适性,寻求各自然通风方式适用范围.研究结果显示,3种自然通风方式中人体头部与脚踝之间垂直温差均小于5℃,满足人体热舒适对垂直温差的要求.自然下部通风、自然顶部通风在人体呼吸区高度上气流速度分布比较均匀,除进风口以及出风口附近区域其他区域气流速度均小于引起人体不舒适的最低气流速度0.25m/s,基本满足人体热舒适对吹风感的要求.在实际操作中,应根据当地气候条件以及室内不同功能选择合理的自然通风方式.

The indoor thermal comfort with different natural ventilation modes

In order to achieve indoor thermal comfort of three kinds of natural ventilation and explore the scope application of them,numerical simulation is used to study indoor air temperature and velocity field of three kinds of natural ventilation included natural displacement ventilation,natural layered ventilation,natural top ventilation.The research results showed that vertical temperature ranges of the three kinds of natural ventilation were less than 5 ℃,which could meet requirements for the human comfort.The air velocity of natural displacement ventilation and natural top ventilation above human breathing zone was well-distributed,besides area near air intake and air outlet,the air velocity in other area was less than 0.25m/ s,which would cause human uncomfortable,could meet requirements of hair drier feeling for human thermal comfort.The methods of natural ventilation should be selected reasonably based on local weather conditions and indoor different functions in actual operations.