Research On Underground Atrium Of Commercial Building Based On Thermal Comfort

Nowadays,the status of social commercial buildings in the city is raising day by day,and the design of the atrium space is widely adopted.More and more commercial complexes use the underground atrium as their central public space.However,with the rapid development of the underground atrium,it has brought a series of problems such as building energy consumption and internal thermal environment,which have put forward higher requirements for the design of such building spaces.This subject analyzes the internal relationship between factors that affect the thermal environment of the underground atrium of commercial buildings and the building space through research methods such as subjective questionnaire surveys,field tests and numerical simulations,and proposes optimized strategies from the perspective of architectural design in order to improve the thermalcomfortof the underground atriumand reduce building energy consumptionvia architectural design.This article first sorted out the current status of domestic and international researches on the thermal environment of underground atriums through preliminary research,found out the unresolved problems according to the use of domestic commercial buildings,and proposed the research goals,research methods and research paths of this project.In the research process,the underground atrium oftwo typical commercial buildings in Shaoxing area,Yaohan Shopping Center and Yintai City,were selected as the research objects.First of all,the correlation among the parameters affecting the thermal environmentwas analyzedby the subjective questionnaire of the crowd and SPSS analysis,and the law oftheinfluenceon the subjective thermal comfort of the crowd was obtained: the factors thathave thelargest impact on the thermal comfort of the underground atrium are the spatial scale and the landscape greening.Then the field test was conducted and the thermal environment data of each measurement point in the research objects was analyzed,obtaining the law of the spring thermal environment of Shaoxing City: the PMV and APMV values calculated by field measurements are consistent with the results of the subjective questionnaire,and the spatial scale hasa large effecton the thermal comfort of the underground atrium.ThenAirpak software was ued to numerically simulate the thermal environment of the buildings under 7 different working conditions,measuring the PMV with a single variable method,analyzing the relationship between each parameter and the thermal comfort inside the underground atrium,and finding out that the PMV value of the first basement is relatively low and does not change significantlywith the increase in the number of layers.When using the inner wall material with a low heat transfer coefficient,the PMV value is greatly improved.When increasing the underground layer height,thermal comfort is improved to some extent andthe more obvious improvement of PMVcomes with the higher layer height.And when increasing the area of the entrance and exit,the thermal comfort is relatively poor.By analyzing and summarizing the results of the above research process,the laws that affect the thermal comfort of the underground atrium of commercial buildings were obtained,and suggestionsto improve the thermal environment were proposed in conjunction with the design of the atrium space of commercial buildings,with a view to providing a certain reference value for the relevant building energy efficiency designand renovation.The paper has 97 pictures,29 tables and 74 references.