Energy-saving Design Optimization Of Green Building Based On Life Cycle Cost Theory

In recent years, green building energy saving technology and Green building evaluation and other aspects are studied extensively at home and abroad. However, there are relatively fewer studies applying the whole life cycle cost concept to green building energy-saving design and optimization. Especially the quantitative analysis and case analysis are lacked. This paper, from the view of the whole life cycle, considering the economic performance of buildings, aims to stimulate more researchers who reflect on the energy saving technical route and promote the formation of new energy-saving technologies routes. The research work of this thesis helps to form a new concept of the cost, helps the enterprise to take appropriate measures to reduce the full life-cycle costs of green building, helps to promote green construction concept, and helps to save construction industry resources.The major work done and the main results in this paper are as follows:The first chapter of this thesis introduced the background of this article research, reviewed the research situation at home and abroad, explicit the research methods, and design the technical route.The second chapter:the related concepts of green building energy saving design and theoretical basis. In this part, described some concepts about building energy-saving, explained the concept and calculation method of building energy consumption, and expounded the concept of orthogonal experimental design and life cycle cost theory.The third chapter:Green design of building energy saving technology analysis. From planning and design, the monomer design and other aspects to comb the green building energy saving design, and analysis several typical envelop enclosure energy saving technology from the perspective of technology, including the external wall insulation system, door and window energy saving technology, rooftop energy saving technology and the performance and structure of sun-shading system. These studies lay the foundation for the follow-up economic analysis.The forth chapter:energy consumption analysis of energy conservation design for environmental architectures. Firstly, analyze the architecture model chosen by this thesis with TBEC to figure out the energy consumption and conservation rate of the initial envelop enclosure group used by the model. Secondly, carry out the orthogonal experimental analysis of the energy conservation design of envelop enclosure for environmental architectures and work out respectively the accumulative cooling load of air-conditionings and heating load as well as the annual total load and energy conservation rate of architectures designed in each experiment. Analyze the impact of all factors of envelop enclosure with orthogonal experimental design to come up with the most favorable scheme (envelop enclosure with minimum load) and the most unfavorable scheme (envelop enclosure with maximum load).The fifth chapter:economical optimization of energy conservation design for environmental architectures based on WLCC. Select the scheme with over50%energy saving rate from representative envelop enclosure schemes based on the technical analysis of energy conservation design and orthogonal experimental design of envelop enclosure schemes in the first two chapters, and work out the initial construction cost, future operation cost as well as WLCC of the reserved scheme and optimal scheme with engineering cost to choose the best design scheme of energy conservation for envelop enclosure.The method of optimizing energy conservation design for environmental architectures based on WLCC raised in this thesis provides an innovative point of view to choose the design scheme of energy conservation for envelop enclosure and realize the qualitative and quantitative choice of the scheme, thus making designers have more choices and comparisons in real design and research to provide optimal service and use minimum energy resources with the lowest cost to save energy, reduce emission and achieve sustainable development.