Abstract
In China, there’s high energy consumption in buildings with less attention to building energy efficiency. All of these facts prove that there are great potentialities in energy conservation. On account of this, this paper introduces multiple building energy-saving technologies at home and abroad, including the technologies for innovative wall materials, exterior wall external insulation, heat insulation of window, utilization of solar energy, heat storage and recovery as well as the illumination energy saving technology. On the basis of new buildings, this paper gives five suggestions on building energy efficiency. Meanwhile it raises five suggestions on energy conservation based on the existing building, for which it presents purposely the technologies and measures about energy saving transformation from four aspects.
Highlights
It is shown by statistics that among the existing buildings in the urban and rural areas in China covering a total area of over 43 billion/m2, only about 5% achieves the energy-saving standard; even among the new buildings, the buildings of high energy consumption still account for over 90%
With respect to energy-saving, 95% of the existing buildings fail to reach the energy conservation standard, and no more than 20% of new buildings meet the energy conservation standard, indicating that the attention paid to building energy efficiency is not enough
It is measured that after the complete implementation of energy saving standard for all new building in Zhejiang Province, 3.5 billion KWH power will be saved each year, accounting for 1.8% of the total electricity demand in the province, equivalent to 1.22 million tons of standard coal; in Jilin Province, the heating energy consumption of unit building area is reduced by 3 kg of standard coal from last year
Summary
Over 90% Buildings in China of High Energy Consumption The status of energy consumption is not optimistic for buildings in China. It is shown by statistics that among the existing buildings in the urban and rural areas in China covering a total area of over 43 billion/m2, only about 5% achieves the energy-saving standard; even among the new buildings, the buildings of high energy consumption still account for over 90%. It is indicated that the total building energy consumption is rising year by year in China to approximately 30% in recent years from 10% at the end of the 1970s in the total energy consumption [1]. Zhang the building energy consumption will reach 1 billion tons of standard coal by 2020 if this trend continues
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