Nationwide Investigation of Relationship among Performance of Ventilation System, Ventilation rate and Indoor Air Quality in Airtight Houses

1.开发了一种新的评估通风率方法。2.日本大部分地区的通风率和室内空气质量是通过实地测量进行调查的。野外测量在三年的夏天和冬天都进行了。出口显示，空气流量的测量结果显示，28个（68%）的房屋因空气变化率较低，低于0.5小时^<-1>。通风率的结果根据恒定集中法显示，21个超过9 （43%）的房屋平均空气变化率较低，则低于0.5 h ^<-1>。在39个（40%）房间里有98个（40%）房间，经过日本卫生、劳工和福利部的指导原则。来自日本卫生、劳工和福利部的99间（53%）房间的TVOC集中在52间（53%）房间中，根据日本卫生、劳工和福利部的可见价值标准。在居住的地方，通风率的数量是不充分的，化学物质的一致性超出了许多案例中的指导方针的标准。3.在飞机上的温度和通风性能的数值。数字分析的准确性已被比较的数字模拟和现场测量结果.4.由数字模拟提出的那些房子中问题的解决方案。

1.A new measuring method for evaluating ventilation rate was developed.2.Ventilation rates and indoor air quality in airtight houses in most parts of Japan were investigated by field measurements. Field measurements were carried out in summer and winter for three years.・The result of measurement of airflow at outlet shows that 19 (68%) houses out of 28 indicate a low air change rate, which is lower than 0.5 h^<-1>.・The result of ventilation airflow rate by constant concentration method shows that 9 (43%) houses out of 21 indicate a low air change rate, which is lower than 0.5h^<-1>.・The formaldehyde concentrations in 39 (40%) rooms of 98 exceeded the criterion of the guideline from the Ministry of Health, Labor and Welfare of Japan.・TVOC concentrations in 52 (53%) rooms of 99 exceeded the criterion of the advisable value from the Ministry of Health, Labor and Welfare of Japan.・In the residence where the amount of ventilation rates was insufficient, chemistry substance concentrations exceeded the criterion of the guideline in many cases.3.Numerical of thermal and ventilation performance on airtight houses sere carried out. The accuracy of numerical analysis was checked by comparing numerical simulations and results of field measurement.4.Solutions to problems in those houses were suggested by numerical simulations.