Research On Energy-saving Strategies For Office Buildings In The Hot Summer And Cold Winter Region Based On Climate Change

Global climate change will have a significant impact on building energy consumption.How to make the building design meet the current climatic conditions while effectively adapting to future climate change is of great significance to promote building energy conservation.The hot summer and cold winter area is the most densely populated area in China.Recently,its rapid economic development has driven the energy consumption of buildings to rise year by year.At present,there are a large number of literatures at home and abroad that start building energy efficiency research from building energy consumption influencing factors.Although some scholars have begun to consider the impact of climate change,research on hot summer and cold winter areas in China is still very limited.Therefore,this paper takes Shanghai,a typical city in the hot summer and cold winter region,as the research area,and office buildings as the research objects.On the basis of considering the future climate change,this article explores the influence of different factors on the energy consumption of buildings,and combines economic benefit analysis to propose energy-saving strategies.The main research work of this paper is as follows:This paper uses the Weather Morph weather generator to predict the hourly weather data of 2050 s and 2080 s in Shanghai under future low-emission scenarios.In addition,according to standards and specifications such as the "Energy Saving Design Standard for Public Buildings",a model of Shanghai typical office building was constructed using IES-VE energy consumption simulation software.On this basis,first of all,through the literature survey method,10 energy consumption influencing factors were selected from the three categories of enclosure structure,internal load and airconditioning system.Moreover,the single factor sensitivity analysis method was used to explore the sensitivity of building energy consumption to different factors in the current and future climate conditions of 2050 s and 2080 s.The results show that the chiller COP value,lighting power density,external wall heat transfer coefficient,external window heat transfer coefficient and roof heat transfer coefficient are the key influencing factors of building energy consumption.Secondly,in response to the five key influencing factors of building energy consumption under climate change,this paper proposes five corresponding individual energy-saving schemes,and cross-combines different individual schemes to obtain 26 combination schemes.Additionally,the net present value and dynamic investment payback period of each scheme are calculated.The results show that,from the perspective of the net present value index,the combination of all individual energy-saving schemes has the highest net present value and has strong profitability;while from the dynamic payback period index,the use of a three-color T5 type energy-saving lamp single program has the shortest payback period,only 2.52 years.Combining the energy-saving effects and economic benefits of different schemes,this paper proposes economical and reasonable energy-saving strategies for office buildings to deal with climate change.