小型双向换气装置对室内空气环境的改善研究

发布时间：2018-06-21 16:08

  本文选题：通风换气 + CO_2浓度　； 参考：《南华大学》2013年硕士论文

【摘要】：随着经济的快速发展，人民生活水平的提高，城市居民每天平均约有80%以上的时间在室内生活、工作等，室内环境的质量不仅仅与居民的身体健康和舒适性有影响，更显著的影响着室内工作人员的工作效率，因此，建筑室内环境质量越来越受到人们的重视。 目前，办公室内大量使用分体式空调，室内没有有组织的新风，主要是依靠门窗渗入或通过开窗换气而获得新风的，但受空调降温、采暖及雾霾、沙尘等天气的限制。为了研究办公室内通风换气的有效性，在模拟研究过渡季节及夏、冬两种气候条件下换气量和换气速率对室内空气环境的影响，探讨小型通风换气装置参数的选择，主要研究成果如下： 1、外墙在采用定热流和绝热边界条件时，模拟研究办公室内气流速度、空气温度的分布差异较大。夏季工况，当外墙传热时比绝热时的室内温度高1.5℃；冬季工况，外墙传热时比绝热时低3.5℃；前者明显比后者的吹风感小且速度分布更均匀。 2、在过渡季节仅利用通风换气装置的换气模式时，模拟研究室内气流速度、空气温度、CO_2浓度及热舒适性的分布状况。结果表明，当室外温度为20℃时，室内空气的温度为22.3℃，呼吸区平均的CO_2浓度约为890ppm。 3、模拟研究通过改变通风换气量对室内空气环境的影响，得到控制呼吸区的CO_2的平均浓度为1000ppm所需要的最小换气量是49.8m3/h。 4、在满足室内通风换气的前提下，通过改变通风换气装置在回收模式时的通风换气速率，结合挂壁式空调制冷、制热时最佳送风方式时，模拟研究办公室的气流速度、空气温度、CO_2浓度及热舒适性的分布情况。结果表明，，随着换气风速变大时，夏季室内的平均气流速度会增大，而冬季室内的平均气流速度会减小。
[Abstract]:With the rapid development of economy and the improvement of people's living standard, the average urban residents spend more than 80% of their time indoors living and working every day. The quality of indoor environment is not only affected by the residents' physical health and comfort. More significant impact on the work efficiency of indoor staff, therefore, the quality of indoor environment has been paid more and more attention. At present, a large number of separate air conditioning is used in the office. There is no organized fresh air in the room. It mainly depends on the infiltration of doors and windows or the ventilation through windows to obtain fresh air, but it is limited by the cooling of air conditioning, heating and smog, dust and other weather. In order to study the effectiveness of ventilation and ventilation in the office, the effects of air exchange volume and air exchange rate on indoor air environment during the transition season, summer and winter were simulated, and the selection of parameters of small ventilation and air exchange device was discussed. The main results are as follows: 1. When the heat flux and adiabatic boundary conditions are adopted, the distribution of air velocity and air temperature in the office is different. In summer, the temperature of the exterior wall is 1.5 鈩

本文编号：2049402