In Europe, various member nations established their own low-energy building standards under the European Union's management guidance, in order to upgrade the building standard towards zero-energy goals 7. The system enables the buildings and communities to regain and sustain the health and vitality of all life within a generation, by the way buildings and communities are designed, built and operated, to achieve an environmentally and socially responsible, healthy, and prosperous environment that improves the quality of life 6. Green Building Council committed to a sustainable, prosperous future with LEED rating system, which is recognized as the leading system as sustainable solution to the buildings sector development.
Various strategies have been developed to achieve better living environment with sustainable goals. Roodman and Lenssen evaluated that 35% of energy in the world are used by buildings, while they are directly responsible one third of global emissions with the certain consumption level 5. Mazria concluded in 2007 4 that once taking the building’s whole life cycle into consideration, more than half of the emissions are relevant to building sector. 3 appraised the true capability of CO 2 emissions reduction from buildings sector covering challenges of cutting emissions from building construction, operation and maintenance, throughout the whole life cycle. As the largest energy consumption resource, the global architecture, engineering and construction (AEC) industry is also responsible for providing the social and economic tenement to the global population, including preserving or retrofitting the buildings and infrastructure already in use. The 17 Goals are planned to be achieved by 2030 with no one behind 2 (2021.7.31). They list the global challenges to overcome, including those related to poverty, inequality, climate change, peace and justice, especially environmental degradation. The United Nations set 17 sustainable development goals as the blueprint for all the member nations to achieve a better sustainable future. It comes up with an agreement on meeting human development goals while simultaneously sustaining the ability of natural systems to provide the natural resources and ecosystem services on which the economy and society depends 1. Multicriteria considerations might influence the balanced between different factors when making decisions in the building restoration project, it is also expected to empower the fresh glory in the development of building protection and restoration.Ĭlimate changes and environmental issues have drawn concerns by many countries in consensuses with developing sustainable measures to overcome the crisis in energy shortage and living ecology. It is concluded the sustainability regain its authentic appearance while achieve energy efficiency embodied within contemporary buildings through adaptational renovation strategies. Technologies innovation are proved to be good tools to improve energy performance the existing buildings by renovation actions such as insulation improvement and so on. The energy performance in the building and both scenarios designed can improve the energy efficiency, while the advanced model could achieve better result in the building energy behavior dramatically. One model with façade supplemented in the insulation layers of the envelope walls and the other model with further upgrade with consideration of recycling materials mixed were discussed and estimated with building performance simulation method. Two models with optimization refurbishment were made through building simulation software.
The sustainability potentials embodied in the building is evaluated by building performance simulations analysis based on field investigation in this case study. The Liyuan courtyard buildings are considered as contemporary architectural symbols of the spirit in Qingdao, China.
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