民用单元住宅空气污染扩散数值模拟研究
发布时间：2018-10-22 20:45
【摘要】：人的一生在室内度过的时间达到80%左右,因此室内空气环境的优劣将直接影响到人类的舒适度、健康状况和工作效率等,近年来随着社会高度工业化发展,室内空气环境污染问题越来越严重,如今已经成为了人类健康的隐形杀手,也是当前世界各国政府和民众共同关注的热点问题。本文将针对民用单元住宅内空气品质进行研究,首先介绍室内主要空气污染物的种类及来源,并总结归纳了目前对于室内空气品质研究的不同方法。其中数值模拟方法在预测室内污染物分布、空气流动方面有很大的优势,相对于实验方法节省时间和成本,但是目前国内外对于整套建筑尤其是民用单元住宅的室内空气流动的模拟应用实例很少,对于结构复杂的多房间内部空气流动特性缺乏研究,室内污染物的散发机理和在空气中的流动传播规律仍需进一步探讨。因此本文采用了计算流体力学方法对室内空气污染物浓度分布、流动特性等进行模拟,选取哈尔滨市某新装修的民用单元住宅作为模拟对象,设定不同的室内外工况,以甲醛作为室内污染物为例,分别在室内没有污染源、有污染物均匀分布、恒定释放速率污染源、有动态释放污染源存在等不同的情况下进行模拟,将得到的室内速度场、污染物浓度场、通风效率、污染物排除效率等重要数据进行对比,以便于室内空气品质进行有效控制和测评。本课题通过模拟手段进一步掌握了民用住宅内部空气流动特性和污染物排放规律,所得结论对提高室内空气品质的控制的措施和手段提供了依据,对实际建筑设计、室内通风策略、污染物排除和控制起到指导意义。
[Abstract]:People spend about 80% of their life indoors, so the quality of indoor air environment will directly affect human comfort, health and work efficiency. In recent years, with the highly industrialized development of society, Indoor air pollution is becoming more and more serious, and it has become the invisible killer of human health. It is also a hot issue concerned by governments and people all over the world. In this paper, the air quality of residential units is studied. Firstly, the types and sources of main indoor air pollutants are introduced, and the different methods of indoor air quality research are summarized. The numerical simulation method has a great advantage in predicting indoor pollutant distribution and air flow, and saves time and cost compared with the experimental method. But at present, there are few examples of indoor air flow simulation in the whole building, especially in the residential units, and there is a lack of research on the internal air flow characteristics of the complex multi-room. The emission mechanism of indoor pollutants and the law of air flow and propagation need to be further studied. Therefore, this paper uses the computational fluid dynamics method to simulate the indoor air pollutant concentration distribution and flow characteristics, selects a newly decorated residential building in Harbin as the simulation object, and sets different indoor and outdoor working conditions. Taking formaldehyde as an indoor pollutant as an example, the indoor velocity field is simulated under different conditions, such as no indoor pollution source, uniform distribution of pollutants, constant release rate pollution source and dynamic emission pollution source, etc. The important data of pollutant concentration field, ventilation efficiency and pollutant removal efficiency are compared in order to effectively control and evaluate indoor air quality. This subject further grasps the air flow characteristics and pollutant emission law of civil residence by means of simulation. The conclusion provides the basis for the control measures and means of improving indoor air quality, and it also provides a basis for the actual building design. Indoor ventilation strategy, pollutant removal and control play a guiding role.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU834.8;X51
本文编号：2288261
[Abstract]:People spend about 80% of their life indoors, so the quality of indoor air environment will directly affect human comfort, health and work efficiency. In recent years, with the highly industrialized development of society, Indoor air pollution is becoming more and more serious, and it has become the invisible killer of human health. It is also a hot issue concerned by governments and people all over the world. In this paper, the air quality of residential units is studied. Firstly, the types and sources of main indoor air pollutants are introduced, and the different methods of indoor air quality research are summarized. The numerical simulation method has a great advantage in predicting indoor pollutant distribution and air flow, and saves time and cost compared with the experimental method. But at present, there are few examples of indoor air flow simulation in the whole building, especially in the residential units, and there is a lack of research on the internal air flow characteristics of the complex multi-room. The emission mechanism of indoor pollutants and the law of air flow and propagation need to be further studied. Therefore, this paper uses the computational fluid dynamics method to simulate the indoor air pollutant concentration distribution and flow characteristics, selects a newly decorated residential building in Harbin as the simulation object, and sets different indoor and outdoor working conditions. Taking formaldehyde as an indoor pollutant as an example, the indoor velocity field is simulated under different conditions, such as no indoor pollution source, uniform distribution of pollutants, constant release rate pollution source and dynamic emission pollution source, etc. The important data of pollutant concentration field, ventilation efficiency and pollutant removal efficiency are compared in order to effectively control and evaluate indoor air quality. This subject further grasps the air flow characteristics and pollutant emission law of civil residence by means of simulation. The conclusion provides the basis for the control measures and means of improving indoor air quality, and it also provides a basis for the actual building design. Indoor ventilation strategy, pollutant removal and control play a guiding role.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU834.8;X51
【参考文献】
相关期刊论文 前1条
1 吴猛;胡桂林;樊建人;岑可法;;住宅室内空气污染物排放的三维大涡数值模拟[J];浙江大学学报(工学版);2006年06期
，本文编号：2288261
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