Study On The Optimization Of Light And Heat Performance In The Facade Reconstruction Of Teaching Buildings In Xi’an University

Green,low-carbon and intelligent is the main trend of the development of China’s construction industry.At the same time,it is also the key to achieve the "double carbon" goal and promote the high-quality development of the construction industry.With the gradual cooling of the new campus construction boom,the existing campus buildings have gradually shown their important position in resources.These existing campus buildings bear the historical and cultural imprint of the school and have high cultural value and reuse value.However,there are still some problems such as poor indoor photothermal performance,old facade structure and unequal indoor photothermal performance of existing buildings in Chinese universities.In this context,this paper will study the existing teaching buildings in colleges and universities,explore the design strategies for improving the light-thermal performance of building space in the facade renovation design,and sort out the use functions of buildings and carry out non-uniform design for the form of external facades according to the different requirements of outdoor environment and indoor space light-thermal performance differentiation.In order to realize the facade optimization of existing teaching buildings in colleges and universities and improve the performance of space.This paper takes the teaching building of the old campus in Xi ’an area as the research object,aiming at solving the problem of building space photothermal performance in the facade reconstruction design stage.The research content of this paper includes the following three aspects:First of all,the non-uniform design elements of the building are studied,and the cases of the renovation of the opposite side and the facade design are sorted out.Then,the teaching buildings in the old campus area of colleges and universities in Xi ’an are investigated,and the current characteristics of the existing teaching buildings in colleges and universities in Xi ’an are summarized.The main teaching building of Xi ’an University of Architecture and Technology is selected as the research object.On the basis of statistical analysis of the test parameters,the existing problems are analyzed and summarized,which lays a solid foundation for the study of optimal design strategy.Secondly,it sums up the strategies suitable for the facade reconstruction of teaching buildings.Based on the parametric simulation optimization platform,with light comfort and thermal comfort as the optimization objectives,the important influencing parameters of architectural design factors such as space volume change,window opening form on the outside side,light guiding component,sunshade component and decorative component were screened and sensitivity analysis was carried out.By analyzing the variation trend of geometric parameter sensitivity and single objective performance,the single factor variables that have great influence on it and the suggested interval of their geometric parameter values are summarized,which are used as the limiting conditions for the geometric parameter values in the multi-objective optimization experiment of teaching building space.Finally,taking the No.1 Teaching building of Northwest University as an example,the non-uniform facade design method was used to design the facade of the building.The optimal geometric parameter suggestion interval was adopted and optimization schemes under different environments were selected with the help of multi-objective optimization plug-in Octopus,so as to find the design balance point that can improve the indoor thermal comfort while ensuring the comfort of light.The optimized design parameters of facade components are used to guide the design of building facades.Finally,the spatial performance after non-uniform optimization is compared with the photothermal performance of the original building model and the homogenous facade design model,and its effect on the improvement of photothermal performance is analyzed,so as to determine the effectiveness of the optimization experiment process.The research verifies the scientificity and adaptability of non-homogeneous facade renovation design under the target of photothermal performance.For teaching buildings with complex external environment and diverse internal functions,the corresponding facade renovation design strategy is proposed,and the non-uniform facade renovation design process guided by light and thermal performance is optimized,which can effectively help architects to carry out facade optimization design and decision-making in the renovation process of building schemes,and transform green and comfortable teaching buildings.