Research On Energy-saving Reconstruction Design Of Buildings In Kunming University Of Science And Technology Based On Thermal Comfort

At present,building energy consumption accounts for about 30% of China’s total energy consumption.In the past decade,the total area of public buildings has increased by nearly three times.The proportion of energy consumption in colleges and universities is about 8% of the total energy consumption of the society,and the per capita energy consumption of college students is four times that of residents nationwide.According to the research report of Building Energy Conservation Research Center of Tsinghua University in 2018,the fastest growth rate of shopping malls and universities is about 5times,and the energy consumption of colleges and universities will continue to show a rigid growth trend.Therefore,building energy conservation in colleges and universities is of great significance.Under the new situation of building energy conservation,it is very necessary to systematically and deeply study the relationship among building thermal environment,human thermal comfort and building energy consumption,which can not only achieve considerable environmental benefits,but also play a strong demonstration role in the construction of energy-saving campus.Mild areas are non-centralized heating areas,and there are few studies on energy saving in universities.However,in winter,some heating devices are used by themselves,and some energy consumption losses are caused by factors such as thermal performance of retaining structure,wind environment,window-wall ratio and unreasonable shape coefficient.In this thesis,Kunming,a typical city with mild climate,is selected as the research object of energy conservation in colleges and universities based on thermal comfort in the building of Kunming University of Science and Technology.The thesis is divided into five chapters.The first chapter gives a preliminary discussion on the research background and purpose,research contents and methods,as well as the research status and results at home and abroad,which provides theoretical support for the following part.The second chapter studies the thermal environment and thermal comfort of the research object in winter,calculates the PMV value and PPD value,and determines the thermal neutral temperature.The third chapter carries out the pre-evaluation of energy conservation transformation,including the sub-evaluation of the research on retaining structure,thermal performance and thermal defects,as well as the comprehensive pre-evaluation of energy consumption simulation before energy conservationtransformation by using swire energy conservation design BECS2020.Combining subjective data with objective simulation to verify the energy saving potential of the building;The fourth chapter is mainly based on performance-based research on energy conservation renovation of existing buildings.That is,relevant software is used for simulation calculation before and after specific renovation measures are proposed to improve the reliability of energy conservation renovation.Firstly,the strategy of climate adaptation design was studied,and then the scheme performance optimization design was carried out based on the previous studies,including improving the thermal performance of the envelope,ventilation optimization and passive solar heating.At last,the energy conservation simulation evaluation is carried out on the buildings after energy conservation renovation to make clear whether the buildings meet the relevant energy conservation standards after energy conservation renovation.Chapter five draws a conclusion through the previous research.To a certain extent,the energy conservation renovation research of the building building of Kunming University of Science and Technology based on thermal comfort can play a leading role in the energy conservation renovation mode of the existing buildings of universities in moderate areas and provide theoretical and data support.