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In recent years, the sharply increasing human demands and excessive abuse of resources have resulted in energy depletion, so global warming become much severe and shows no sign of slowing down. If the wars are the nightmare of people in the 20th century, energy depletion will be the greatest challenge for us in this century. If we don''t take measures and make change, the earth will not be suitable for us to live.
Modern people are now inclined to stay indoors for a long time,, where there is full of turbid air containing most harmful substances. In an unventilated indoor space, these gases will continuously circulate, which decreases the oxygen proportion and cause indoor air pollution. To improve the indoor air quality without using air conditioning systems, the indoor air ventilation is undoubtedly the most important. The good indoor ventilation is able to provide multiple functions. That is to say, it can increase oxygen and reduce accumulated air pollution, which guarantee good indoor air quality, and it can also help to dissipate heat, improve human comfort, and lower the indoor temperature to realize the structure’s cooling efficiency.
We have to admit that the nature can influence our life style, health and comfort degree. Therefore, this study takes a low-rise residential building which is under designing and attempts to create an eco-community as its research base, uses the computer to stimulate and explore the indoor ventilation, and finally proposes effective strategies for improving indoor ventilation. Improvements and subsequent reviews are conducted to provide reference for designers for improvement and assessment.
Content of each chapter is as follows：
Chapter 1、Introduces the research motivation, objectives, scope and procedures.
Chapter 2、Starting from the outdoor to indoor environment, focuses on the strategies for improving environment control，and the benchmark of human body comfort and health inside the room based on the theory of auxiliary indoor ventilation.
Chapter 3、Analyzes the environment in the base and integrates the weather data from the Central Meteorological Bureau，to conduct CFD simulation for setting the experiment parameter conditions.
Chapter 4、Introduces the experiment and settings of environment model, including boundary settings and model dimension，to explore the house type unfavorable for indoor air ventilation and put forward improvement strategies. The strategy directions are：
a. Changing the direction and angle of buildings opening.
b. Extending the balcony.
c .The additive effects of balcony planting.
Chapter 5、Adopts computer software CFD simulation to explore and compare the effects of the three different variations，as well as evaluate the effects of the proposed strategies on indoor environment improvement.
Chapter 6、Presents the research results, namely, the improvement effect and influences on indoor environment，providing suggestions for occupants in terms of design and proposals for future researches
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