Study On The Evolution Of Building Energy Consumption In Jiangxi Province Under Climate Change

Buildings are built by climate,which has a decisive impact on building energy consumption.However,with the acceleration of urbanization and the increase of emissions of pollutants and greenhouse gases in recent years,the global climate has changed greatly.It is necessary to understand the evolution law of building energy consumption under the climate change because the weather data are used in the current architectural design,which leads to the poor consideration of the future development in the architectural design.First of all,on the basis of analyzing the generation methods of various typical meteorological years at home and abroad,the most suitable method for use at present in China is selected.Based on the hourly meteorological data obtained from Nanchang area from 1987 to 2016,the typical meteorological annual data are updated and a new typical meteorological year data is obtained.Then,on the basis of analyzing the generation methods of the future meteorological data,the greenhouse gas emission scenario which is most suitable for the national conditions of our country is found,and the meteorological data under the future time period is generated.Take an office building in Nanchang as an example,this paper analyzes the changing rule of energy consumption under the typical meteorological data of the original,present and future typical meteorological years in Jiangxi Province.It is found that the refrigeration energy consumption of buildings is always an upward trend,while the heating energy consumption has been in a downward trend.And the total energy consumption has been increasing.Compared with the original,the corresponding annual air-conditioning energy consumption of office buildings under typical meteorological year data found that the energy consumption of air-conditioning refrigeration showed an upward trend,rising range was 1017.16 kWh,and the proportion of increase was 7.16%.The heating energy consumption of air conditioning decreased by 154.88 kWh,or 2.68%.The overall air-conditioning energy consumption is still increasing.The upward trend,up 862.3 kWh,rose by 4.32%.Compared with the original,the annual air-conditioning energy consumption of office buildings corresponding to the typical meteorological year data in 2080 s shows that the energy consumption of air-conditioning refrigeration shows an upward trend,rising by 20925.87 kWh,and the percentage of increase is 147.48%.The heating energy consumption of air conditioning decreased by 4074.4 kWh,and the percentage of decrease was 70.6%.Total air-conditioning energy consumption also showed an upward trend,rising 16851.3 kWh,to 84.43 %.Finally,the trend of the heat flux of each building envelope structure in the future is analyzed,and the orientation of the optimal window area in the typical meteorological year is obtained,which changes from south > north > east > west to north > south > east > west,and analyzes the reasons for its change.Based on the analysis of the change of heat flux in different typical meteorological years,it is found that westward heat insulation should be paid attention to no matter what period of typical meteorological year.