| At present,the modernization process of our country is getting faster and faster,the urban structure is compact,and the land resources are tight.In order to meet the increasing production activities and living needs of people,effectively utilize the land area,and improve the use range of human activities,super high-rise buildings will become the inevitable trend of the future development of urban architecture.The energy consumption of super high-rise buildings is higher than that of traditional buildings due to its structural height and large use of glass curtain wall,so the analysis of energy consumption of super high-rise buildings is an essential part of the research on building energy conservation.Energy saving and emission reduction measures are divided into passive measures and active measures.Passive measures refer to the non-consumption of energy and rational use of energy saving measures in building planning,including building shading,natural ventilation,envelope structure,surrounding environment,etc.,to effectively reduce building energy consumption.This paper takes a super high-rise building in Hefei as the research object and sets reasonable energy saving methods according to climate characteristics to obtain the best energy saving and emission reduction measures.The paper is divided into the following points:（1）In this paper,the our country nearly 10 years of building energy consumption and carbon emissions serious trends,as well as the further development of our country,the necessity of building energy efficiency,ordinary buildings at home and abroad and referring to a case study on energy saving and super-tall building energy efficiency,combined with the advantages and disadvantages of different passive energy saving measures,tall building energy efficiency design of adaptive scheme is put forward.（2）Building simulation calculation software is selected to establish theoretical model and physical model with super high-rise buildings as the research object.The typical calculation day is determined according to the climate characteristics of the research area,and the room temperature variation rule of different floors of super highrise buildings on the typical calculation day is analyzed.（3）Hefei is a typical area with hot summer and cold winter,and the annual sunshine duration is more than 2200 h.Solar radiation has a great impact on building energy consumption,and the shading of exterior Windows can effectively reduce solar radiation.In this paper,the internal shading includes low,medium and high reflectivity louvers and dark and light color cloth curtains,and the external shading includes horizontal and vertical sunshades with lengths of 0.5m>0.8m>1m and 1.3m,using Design Builder softwareThe shading method with the best energy saving effect was obtained through simulation calculation.Finally,the relationship between shading layer number and external shading coefficient was calculated according to the different characteristics of shading effect on different layers.（4）In summer morning and evening natural ventilation,can effectively reduce indoor load,winter can use natural ventilation,reduce the load of the inner area,so you can use natural ventilation at different times of the day,to achieve energy conservation and emission reduction.In this paper,four periods of natural ventilation were set to achieve the best energy saving effect at night（20:00-06:00）.（5）The study of external envelope structure is divided into window-wall ratio and wall insulation system.First,the energy consumption simulation software is used to calculate the building energy consumption when the window-wall ratio is set to 0.4～0.9,and the relationship between the window-wall ratio and the building energy consumption is obtained by comparison.Secondly,the analysis of the same insulation material in 6 kinds of thickness and the relationship between six different insulation materials and building energy consumption under 2/3 of the same thickness was studied to obtain the optimal window-wall ratio and insulation thickness insulation material.（6）In this paper,the high-rise buildings around the layout analysis,to study the external different heights and super-tall buildings different spacing of super-tall building energy consumption influence size relations,on the basis of enumerating the11 kinds of external in ultra-high buildings arranged around the situation,according to the simulation software to calculate the most unfavorable toward and best arrangement.（7）Taking a traditional office building in Hefei as the object of comparative study on the energy saving effect of super high-rise buildings,a physical model was established first,and the same measures were set to simulate the energy consumption of super high-rise buildings.Finally,the effect of super high-rise buildings under the same measures was better than that of traditional office buildings.（8）Combined with the actual case of Ofu Times Square,the efficiency-cost ratio of different energy saving measures and total residual life-cycle income are calculated according to the initial investment and electricity saving cost,and the optimal economic plan for each energy saving type is obtained.Finally,various schemes are optimized and combined to analyze the energy saving,electricity saving and carbon saving of super high-rise buildings under the comprehensive measures.The results are as follows: After the addition of comprehensive energy saving measures,super high-rise buildingsThe total energy consumption and the total power consumption of air conditioning have decreased significantly,the energy saving is 3006840 KW-h,the electricity saving is 1574500 KW-h,and the carbon saving is 462480 T /a,the energy saving rate is 29%and the carbon saving rate is 30%.Due to the high initial investment,the cost-benefit ratio is not as good as the single energy saving measure.However,the total income of the remaining life cycle is significantly improved,and the total income in 30 years is110,689,200 yuan,which is very substantial in economy. |
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