Post-evaluation Of Glass Curtain Wall Large Green Office Buildings

In recent years,as the country has strengthened its support and guidance for the development of green buildings,green buildings have developed rapidly,the performance of green building materials and products has been continuously improved,and the number of projects that have obtained green building marks has increased year by year.However,the operation and actual effect of most of the projects that obtained the green label are still unknown,and the glass curtain wall as the enclosure structure has problems of high energy consumption,poor thermal insulation performance and poor sound insulation performance,so it is necessary to Green office buildings such as glass curtain walls were evaluated after use.Post-use evaluation is to evaluate the use status and performance of buildings that have been in operation for more than one year,and tend to evaluate building efficiency.The thesis first determines the post-assessment method of this article,and then collects the energy consumption data of the case buildings through on-site surveys,consults the relevant standards to determine the indoor environmental testing methods,measurement points and locations.Then use the method of induction and analysis to analyze the total energy consumption and sub-energy consumption data,and conclude that green office buildings do have obvious energy-saving effects compared with ordinary buildings,but the energy consumption of the air-conditioning part is still high,even higher than ordinary buildings.At the same time,the on-site measurement of the main indoor functional areas in summer,transition season and winter was conducted,and the questionnaire survey was distributed to building users to analyze the current status of the indoor environment quality of green office buildings,and found that indoor office personnel Satisfaction is high.This part mainly makes an objective analysis of building energy consumption and indoor environmental quality.Then,through interviews with property management personnel,check property management information,and compare with the "Green Building Evaluation Standard" GB / T50378-2014 land saving,energy saving,water saving,material saving,indoor environmental quality,construction management and operation management score items Field research,analysis of energy-saving technologies and usage of buildings,and scoring,bring into the formula to calculate the status assessment score,and determine the total score of the case building is among the two stars.Based on the above status quo and evaluation analysis,the common problems existing in the three stages of design,construction and operation of the case building are summarized,and all scoring items related to building energy consumption are found,the influencing factors are summarized,and the impact of each influencing factor on energy consumption is calculated.According to the proportion,the analysis shows that the glass curtain wall as the envelope structure is the largest influencing factor for the high energy consumption of large green office buildings such as glass curtain walls.From a quantitative point of view,the thermal performance of glass curtain walls under different combinations is analyzed on the impact of building energy consumption,and the performance of curtain walls available in Suzhou is obtained: for existing buildings,in order to reduce the heat transfer coefficient,it can be used in the interior of the curtain wall The method of layering energy-saving film;for new buildings,in order to achieve the goal of 65% energy saving,the heat transfer coefficient of the curtain wall should be controlled between 1.2-2.3 W /(㎡ · K).Control between 0.7-1.2 W /(㎡ · K).At the same time,according to the type of glass curtain wall and the shape of the building,it is reasonable to choose whether to use internal shading,external shading or central shading.Then it puts forward the optimization strategy for each stage of large green office buildings like Suzhou glass curtain wall.At the end of the paper,the rational design of glass curtain wall is necessary for energy saving from the perspective of energy saving of buildings.At the same time,from the perspective of sustainable development of green buildings,it is emphasized that designers,construction units and property management units need to work together and supervise each other to achieve the true "green building" "Green",and put forward the deficiencies of the paper and improvement work.