The composition of building energy consumption. Energy Consumption refers to the buildings (including residential buildings, public buildings, and services) using the process of energy consumption, including heating, air conditioning, hot water, cooking, lighting, household appliances, elevators, ventilation, etc. can consumption. Among them, the heating, air conditioning, ventilation and other energy consumption, total energy consumption of buildings accounts for about 2 / 3.
China's building energy efficiency potential. 2010, China's housing total construction area will reach 51.9 billion m2, of which 17.1 billion city m2. At present, the total area of energy-saving buildings in China is only about 2.3 m2, in the nearly two billion m2 of completed area, only 5 more than 10 million m2 is to save buildings, only about 3%, meaning that 97% is a high energy construction, if the goal of saving 50% of the calculated energy per square meter, 30kg of standard coal each year, the 97% of the high-energy buildings consume about one year more than 58.5 million t of coal, energy-saving potential.
The definition of energy-saving construction. High comfort, low energy consumption building looks plain, but the internal structure is very delicate, especially in the wall structure, the glass doors and windows, heating methods such as the use of a large number of new technologies. If the external wall, roof and ground to increase 5? 10cm thick insulation; use the middle filled with inert gas barrier and high thermal insulating glass window frame enclosed high thermal resistance; in the window shade installation of facilities in the summer heat stop the "invasion" ; use of natural ventilation systems to minimize the window opportunity for energy saving room to reach the goal of ensuring light and bright, spacious and comfortable, but also reduce energy consumption, lower operating costs result. Ministry of Construction since 1997, has gradually introduced the three energy-saving design standards for residential buildings, respectively, to cold regions of the subtropical region to regulate residential building design, according to these new standards than the old design of new residential housing saving 50%? 65%.
Non-energy efficient buildings and construction of difference and the benefits to the consumer. Ontology construction cost of energy-saving than the non energy-efficient buildings despite an increase of 8%? 10%, but its energy consumption than non-50% reduction in energy-saving buildings? 65%, and the benefit of up to 50? 70 years.
On the transformation of non-energy efficient buildings. Among non-energy-saving construction, 35% of the heat distribution from the wall, so energy saving should be the first from the building envelope (walls, doors, windows, roof) to start, such as external wall, roof insulation layer increases, back doors and windows sealed section, filled with inert gas with double glazing, energy-saving effect is obvious. In addition, energy saving lamp lighting, heating, cooling system temperature control terminal, district heating, district cooling using household metering device, while the development and use of solar energy, geothermal and other new energy sources, is also the transformation of non-important energy-saving construction measure.
Present new energy-efficient building materials and technology. External wall and roof insulation for thermal insulation board, fly ash aerated concrete blocks used for wall insulation, double glazing, new low-power windows and doors and other materials; solar, geothermal and other new energy sources use and energy utilization; use of computers to refrigeration and air conditioning systems and intelligent control; building indoor temperature and humidity control technology; cold heat metering and charging technology and products.