Comparative of Carbon Emission Reduction Effect between the Self-Insulation and External Thermal Insulation Structural Buildings

抄録

Since China's reform and opening up, urbanization was promoted and remarkable achievements were made. Urbanization rate rose from 20% in the early 1980s to 53.7% in 2013, and the number of urban residents' households rose from 155 million in 2001 to 257 million in 2013. Floor space of Urban and rural residential and public building completed increases year by year. According to China Building Energy Model (CBEM) put forward by Building energy conservation research center of Tsinghua university, although the total building energy consumption and electric power consumption increases substantially, however, China's overall energy efficiency was only about 33% and energy consumption per unit GDP even didn't achieve the world's average until the year 2013. Excessive development and utilization of energy becomes the main cause of environmental pollution and climate change. Due to the large-scale building construction activities and energy consumption, in the year 2013, the yearly carbon emission of China achieved 10 billion tons, which was accounting for nearly 30% of the world's total amount and more than the sum of the European Union and the United States. While the blame from the international community on China's carbon emission causes the external pressure, the local climate change causes the internal pressure. Consequently, it is imperative to implement effective measures for energy conservation and emission reduction. The climate change caused by the greenhouse effect has caused a great threat to the world environment. As the largest country that emits carbon dioxide, China has carried out a wide range of energy-saving and emission reduction work, of which the reform of wall materials is an important part. New-type wall increases the recycling of the industrial waste, facing the direction of lightweight, low energy consumption, low production consumption, high thermal insulation performance. By paper research, the article summarizes the full-life cycle and its evaluation method of construction, whose entire life cycle is divided into five stages including production of building materials, transportation of building materials, construction, building operation and destruction. Take the building B-39# in D area of JDXG real estate, Hangzhou, Zhejiang. China as example, with the theoretical framework of carbon emission system, calculate the LCA carbon emission of example building under the external wall construction of Autoclaved Aerated Concrete (AAC)Bearing Block (B04, B06) self-insulation structural system as well as concrete hollow block external thermal insulation structural system. By comparative analysis, verify the reduction effect of new-type wall materials.