| With the rapid growth of the country’s economy and the rapid development of the construction industry,architects must not only build buildings suitable for people to live in,but also meet the aesthetic requirements of occupants for the appearance of buildings.Therefore,in addition to meeting the main structural design of the building,architects also pay more attention to the design of the appearance of the building.The most important thing in the appearance of the building is the use of the building curtain wall.At present,building curtain walls have been widely used in various public buildings or residences,among which the most used is glass curtain wall.However,as one of the most active outdoor heat exchange peripheral structures,it will inevitably cause a large amount of energy consumption in use,which does not achieve the purpose of energy conservation and emission reduction proposed by the state.Therefore,in-depth study of the thermal performance of glass curtain wall and its energy consumption plays an important role in realizing the energy saving of glass curtain wall.Firstly,based on the theory of heat transfer,this paper analyzes the heat transfer mode of the curtain wall in the heat transfer process and summarizes the calculation method of the heat transfer coefficient of the entire curtain wall.Secondly,through field research,the use and utilization of glass curtain wall in Shenyang City is mainly in the form of curtain wall,and it is found that most buildings mostly use open-frame glass curtain wall as the main curtain wall form,the glass panel material is mainly insulating glass or hollow laminated glass,and the column is aluminum alloy heat insulation profile.Using window,MQMC software and other simulation software,the main components of the glass curtain wall,namely the glass system and the profile system,are quantitatively calculated,and the influence of each parameter on the heat transfer coefficient of the glass curtain wall is analyzed.It is concluded that taking insulating glass as the research object,the change trend of K value in the range of hollow layer thickness is 9mm-13 mm,and the thermal performance is superior.The hollow layer is filled with argon,and the Low-e film position is set on the second or third side of the insulating glass to improve the thermal performance of the glass curtain wall.The results show that the aluminum alloy heat insulation profile is selected as the research object for quantitative analysis,and the results show that the overall effect of the I type heat insulation strip is the best from the aspects of cost and thermal performance.The larger the height of the heat insulation strip,the smaller the heat transfer coefficient value of the curtain wall as a whole.Then,a local open-frame glass curtain wall building was selected for field testing to obtain the temperature and heat flux density data of the inner and outer surfaces of the glass in a real environment.Through the simulation and comparative analysis of the measured data and theoretical data through MQMC software,it is found that there is a certain difference between the measured heat transfer coefficient value and the numerical simulation value,and the main difference is that the actual heat transfer at the joint between the glass panel and the frame profile is higher than the ideal condition.Finally,through the De ST energy consumption simulation software,the energy consumption simulation calculation of a building using different types of glass as glass curtain wall panel materials can be calculated from the two aspects of energy consumption and economic indicators: the combination of Low-e insulating glass filled with argon and aluminum alloy thermal insulation profile using I-type heat insulation strip is a glass curtain wall design form that is more suitable for cold areas.This paper is expected to play a certain reference role in the use and design of glass curtain wall in heating area through theoretical calculation and analysis combined with practical cases. |
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