Energy Conservation Strategy Research for Residential Building Refurbishment in Urban area of China

The main purpose of this study is to establish a design strategy framework for residential building refurbishment in urban area of China. By studying of the advantage research and case studies in Europe, complete methodology and innovation technology would be proposed as the result of this research. Exploratory research for energy conservation design strategy for residential districts is also drawn up. The result of this research would cover the shortage of energy conservation design strategy for existing residential building refurbishment and also put forward the instructional principles for low carbon emission city development. Through the literature review, building energy consumption in the world level is summarized and comparison between that of Europe and China is made to improve the fesibility for making research on the topic of urban residential building refurbishment in China. By the analysis of influence elements for existing residential building in urban area, reasons for implementing residential building refurbishment project could been summarized into three aspects. Study on existing legislation and regulations for building in China is made and then the regulations which are specific for building energy efficiency and residential building design is categorised into different sustainble typologies. In China, until now there is neither systematic research nor complete building design regulations for building refurbishment and the innate complexity of residential building refurbishment project. But with the limit of energy and territory, energy shortage and sustained growth of requirement for residential buildings in urban area in China is the urgent conflict which could restrict sustainable development of China and increase energy crisis in the world. There are some excellent case studies of residential building refurbishment in Europe. In the project of ENPIRE, there are six residential buildings renewal projects which are in different cities come from six coutriesWe make complete anaysis on the project of ENPIRE and try to transfer advanced theory and techniques for residential buildings refurbishment energy efficiency procedure. The existing residential building refurbishment is a topic which has relations with many fields. The research about energy conservation of existing residential buildings should consider from urban level, district level then to building level. So the data collection survey is an essential preparation. In order to distinct the composing of residential building energy consumption and direction of building energy-saving of residential building, we have to analyse the relationship between building energy consumption and characteristics of the the city such like weather features, geography features as well as the body characteristics of residentail building. Five cities which were selected from different climate zones have been chosen as the representative cities and the characteristics of each cities have been summarized as the basement of urban and building analysis of these cities. Excluding the city and building energy consumption characteristics, different stakeholders would play different roles in the process of refurbishment. Energy price, family income, living environment sustainable policy and house ownership, all of these elements could influence the refurbishment. For organising the sufficient work process to meet the demand of energy conservation, comprhensive analysis methodlogy such as AHP (Analytic Hierarchy Process) and ANP( Analytic Network Process) could be adopted for analysing effect weight. In the meanwhile, considering ecnomic and local elements, available technologies which could be fitted for using in China. The strategy of Urban Residential Building Refurbishment in China could be divided into scheme stage and design stage. The differences between China and Europe is the important point for this research. In the scheme stage, category and characteristic of existing residential building in China have been summarized. On the base of this summary, problems of existing residential building have been rised. At the same time, the study of existing residential buildings was penetrated into two aspects: professionals sides and administration sides. An investigation is made to architects from 10 selected first level cities. The questionary was made from three levels: general opinion about building energy efficiency technology and CO2 emission reduction issues; importance of exiting energy efficiency regulations in building design process and development of residential building refurbishment project. From the information of this investigation, we can realize clearly that importance and technology of energy conservation for residential buildings should be improved a lot. From the administration sides, both from top-dwon promotion and bottom-up implemention sides, we can get Integrated-model projections for improving energy efficiency for residential building in urban. From the development of urban plan, district environment promotion and building trend, there are sufficient Instinctive motives of residential building refurbishment in urban area of China. In the design stage, the framework of working procedure for residential building refurbishment could be summarized into 8 steps. For each step, multiply players would take part into comprehensive actions to improve energy conservation. So the energy consumption process could be summed up into four steps. Specific energy efficiency principle and technologies would be proposed with the interpretation of different case studies. These case studies are selected because the advantage experiences for special part of the framework. In the energy consumption survey phase, energy consumption datas and related building and city architecture features should be collected. A series of form for target building investigation could be made and be used for all this kinds of projects. In the discussion and embedding agreement step, different stakeholders like inhabitants, architects, managers, construction organizations should be coordinated and get agreements for energy saving target. In this step, initial refurbish plan could be drafted and energy conversation level could be fixed into high, middle and low three levels. By comparisons and discussions, clear target could be determined on the coordination by all the players and agreement could be signed. Then, energy ambitions could be set and energy options could be selected on the base of agreements. The energy efficiency includes three aspects: Building thermo technical and related properties measurement; Energy consumption and emission reduction effectiveness; Function promotion of residential settlements. For each aspect, we will make the analysis with one Chinese case study which had been done to meet the point of requirement. For implementing, project monitoring and maintains should be kept during the refurbishment process and also after refurbishment. Technology utilizing in construction organizing and construction supervision steps should be considered of. Uniform quality assurance acceptance standard could be drawn up. Exploratory research will be made in the direction of improving low carbon emission residential districts and urban development in China. This thesis looks into the event in the urban planning way. By analyzing the true fact, this study may give useful advice to the real practice. And at the same time, it also gives reference to the housing sustainable development work.