Life Cycle Assessment For Energy Consumption And Carbon Emission Of Integrated Building

As a new kind of green construction, integrated building, characterized byindustrialization and highly integrated production mode, improves the efficiency ofsocial production and saves energy and resources. All these features make integratedbuilding have a prospect future and a long-term development.According to the theory of life cycle assessment and ISO₂4040specification, alife cycle assessment for integrated building is proposed. Furthermore, this paperestablishes computational models for integrated building’s life cycle energyconsumption and CO₂emissions to make quantitative analysis of energy consumptionand CO₂emissions. In addition, Based on a great deal of field investigates, materialsand data, some basal data relating to the life cycle assessment for integrated buildingare analyzed then the useful ones are selected, such as, primary source, embodiedenergy value, energy consumption of the building and the HVAC systems in thestages of transportation, embodiment, maintenance, and demolishment, as well asrelevant emission factors, etc. All of these provide data support for the calculation.In this paper, a Broad Group’s Sustainable Building-T30Tower Hotel waschosen as a typical integrated building to make a contrast with a traditional building inChangsha. Using the life cycle assessment calculation model, a comparative analysiswas made between two kinds of building, and the results show:1. Each stage’s energy consumption and CO₂emissions of two buildings’ in thelife cycle have same proportion in each total ones. Energy consumption and CO₂emissions in use and maintain phase occupy the most prominent position, reaching upto about95%.2. T30Tower Hotel’s life cycle energy consumption is6.39×10⁸MJ, the totalCO₂emissions are3.505×10⁷kg. The functional unit’s CO₂emissions are40.435kg/m²·a, which is36%of contrast construction. The functional unit’s energyconsumption is737.35MJ/m²·a, which is38%of the building for comparison.3. T30Tower Hotel has an obvious advantage both in energy consumption andCO₂emissions in life cycle and in each stages: energy consumption and CO₂emissions in construction stage are each18%and22%of traditional building, whilein use and maintain phase, each proportions are38%and35%.Based on the above analysis, energy consumption and CO₂emissions in the life cycle are less than traditional buildings obviously. What’s more, reducing energyconsumption and CO₂emissions in the stage of use and maintain is the mostsignificant and effective. So, in order to slash energy consumption and CO₂emissions,we should apply appropriate energy-saving measures at the design stage.