室内空气质量多目标体系的建立与数值模拟研究

发布时间：2018-08-16 09:53

【摘要】：人的大部分时间都在室内空间中度过,室内空气质量直接关系到人的健康状况,所以明确室内空气质量标准,采取相应的对策与措施改善室内空气质量,为人们提供一个安全、健康、舒适的环境,提高室内人员的工作效率和生活质量是我们的目标。首先,本文研究了民用建筑室内空气质量分级目标体系。通过讨论我国现行的室内空气质量相关标准,并与发达国家现行的室内外空气质量标准相对比,总结选取了具有我国特点的5个污染物指标,并因地制宜、因时制宜地提出针对这5个污染物指标的室内空气质量三级评价标准建议值,明确室内空气质量标准,为中国室内空气质量标准的进一步完善提供建设性参考。其次,本文采用计算流体力学方法分别模拟了一套三室一厅的住宅在不同室内甲醛初始浓度下自然通风与风机盘管加独立新风系统的速度场与浓度场,以及在不同室外PM2.5浓度下的速度场与浓度场。对两种污染物的浓度场分布进行分析和比较后发现：当室内甲醛含量超标,室外PM2.5浓度不超标时,则自然通风是净化室内甲醛的最佳选择；当室外PM2.5浓度超过185μg/m3,不适合采用自然通风。最后,还分析总结了两种污染物对室内空气质量的共同影响规律,提出了一套适用于甲醛和PM2.5污染同时存在情况下的住宅室内空气质量优化策略。
[Abstract]:People spend most of their time in indoor space. Indoor air quality is directly related to people's health, so it is clear that indoor air quality standards should be defined, and corresponding countermeasures and measures should be taken to improve indoor air quality, so as to provide people with a safe environment. Healthy, comfortable environment, improve indoor staff work efficiency and quality of life is our goal. Firstly, this paper studies the classification target system of indoor air quality in civil buildings. By discussing the current indoor air quality standards in China and comparing them with the existing indoor and outdoor air quality standards in developed countries, this paper summarizes and selects five pollutant indexes with the characteristics of our country, and takes measures according to local conditions. According to the situation of the time, this paper puts forward the suggested value of the three-level indoor air quality evaluation standard for these five pollutant indexes, defines the indoor air quality standard, and provides a constructive reference for the further improvement of the indoor air quality standard in China. Secondly, the paper simulates the velocity field and concentration field of natural ventilation and Fan-Coil Unit plus independent fresh air system under different initial concentrations of formaldehyde in a three-room one-room residence by using computational fluid dynamics method. And the velocity field and concentration field under different outdoor PM2.5 concentration. The distribution of concentration field of two pollutants was analyzed and compared. It was found that natural ventilation is the best choice for purifying indoor formaldehyde when the indoor formaldehyde content exceeds the standard and the outdoor PM2.5 concentration does not exceed the standard. When outdoor PM2.5 concentration exceeds 185 渭 g / m ~ 3, natural ventilation is not suitable. Finally, the common influence of two pollutants on indoor air quality is analyzed and summarized, and a set of indoor air quality optimization strategies suitable for both formaldehyde and PM2.5 pollution are put forward.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X51

【共引文献】