The Theory Study On Energy Efficiency In Civil Buildings In China--to Improve Heat Insulation Performance Of Buildings' Envelope

The low energy efficiency in buildings of China is mainly resulted from poor heat insulation performance of buildings' envelope and inefficient heating and cooling system. To promote energy efficiency in buildings as a whole, this paper has studied how to improve heat insulation performance of buildings' envelope from necessity, technology, economy and management aspect respectively, which will provide theoretic basis to formulation and implementation of corresponding policies and regulations.On the foundation of China sustainable development strategy, study on Necessity Principle expounds in detail the essentiality and necessity of improving civil building energy efficiency from three aspects: the state resources strategy, environmental protection strategy, and uplift the people's living standards. This paper also points out why actions should be immediately taken. On the basis of buildings heat input and output principle, Technology Principle analyzes factors affecting building energy consumption, energy efficient technology and measures for building external wall, windows, roof and floor, and how to use renewable energy in buildings. Evaluation method of comprehensive technological measures for energy efficient buildings is also discussed.Economy Principle analyzes the interest relations between correlative parties of energy efficient buildings,and with reference to foreign experiences,presents proposals for economic incentive policies of energy efficiency in buildings of China. From micro aspect, this paper brings forward technological and economic analysis method to concrete the interest relations between correlative parties.Management Principle analyzes energy efficiency programming of buildings and standards and codes management; proposals are put forward accordingly. Implementation of certification and labeling system of energy efficient buildings is discussed in depth,as well as how to strengthen capacity of administrative organizations of energy efficiency in buildings.