CO2浓度是评价室内空气质量的重要指标之一,控制较低的室内CO2浓度对室内空气质量和人的身心健康起着重要作用.对大连市某小区室内CO2浓度的变化情况进行了连续监测.通过设置不同开窗状态,分别监测了该小区室内不同条件下的CO2浓度变化.结果表明,CO2浓度随时间和通风情况呈现出不同的变化趋势,室内不同位置的CO2分布特性也有所不同.密闭情况下,时间越长,室内CO2浓度越高.当进行自然通风时,即使较短的开窗时间也能使室内CO2浓度迅速降低.研究表明,保持良好的室内通风,选择性开窗对降低室内CO2浓度、保持较好的室内空气质量有着重要作用.%CO2 concentration is one of the important indexes to evaluate indoor air quality,and keeping a low indoor CO2 concentration is very important to improve indoor air quality and maintain physical and mental health.The change of CO2 concentration in the residential building of Dalian city is monitored continuously.By setting different window conditions,the change of CO2 concentration is monitored in different locations in the building.The result shows that the CO2 concentration has different change trends with time and indoor ventilation,and the distribution characteristics of CO2 are also different at different locations.When the windows are closed,the longer the time is,the higher the indoor CO2 concentration is.But even a short opening time can make the indoor CO2 concentration decrease rapidly. Keeping good indoor ventilation and windows opening for fixed time have a significant effect on reducing the indoor CO2 concentration and keeping good indoor air quality.
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