Research On Natural Ventilation Of Large-scale Public Building In HOT-summer And COLD-winter Region

Public buildings with great space,important symbols of urban modernization growth,are places personnel gather with characterized by big range,dimension and various space shapes.Modern public buildings usually adopt closed designs for internal window ventilation.That we use central air-conditioning system to adjust thermal comfort degree must produce enormous building consumption.So,starting with an idea of green power of public buildings with great space and sustained development,we apply natural ventilation designs and improve natural ventilation capacity of structures,save building consumption and become main growth trend of modern building naturalization and ecologicalization construction.Hunan Province enjoys typical climate which summer is hot and winter is cold.Its four distinctive reasons are showed that winter is cold,summer hot,temperature is various in spring,dropping in autumn,much rain occur in spring and summer,fall and winter are dry.The ventilation designs present various ways as climate changes.The paper attempts initial discussion for the design suitable for areas of "summer hot winter cold" from field design,border conditions,vertical space and component.Concrete contents conclude the below five aspects:The first aspect is to do up for research of natural ventilation design of public buildings with great space.It mainly concludes three aspects which are consumption status,research status of ventilation strategy and natural ventilation design status.They illustrate its reason with more consumption and necessary energy conservation.The second aspect is to study within central and north areas of Hunan province enjoying typical climate which summer is hot and winter is cold and sum up symbols of climate and wind environment;state concept of public buildings with great space and analyze space arrangement features of different function building.Based on statistic data of great space public buildings symbolized by central and north areas of Hunan province,clarify them by eras,shapes and technology,and explore its potency by the ways of two-two contrast.The third aspect is to combine CFD wind simulation technology to study the influence on natural ventilation for outdoor wind environment,enhance controlling factors of outdoor wind environment as well as summarize field design principle good for the design.The fourth aspect is to receive strategies of building shape design,space design and border design good for air pressure ventilation from vertical space including section shape,patio shape,skylight shape and creasing component combining influence of two aspects of ventilation effects CFD wind environment simulation technique studies vertical space to wind and heat pressure effects.The fifth aspect is to combine the above conclusion of design principles and strategies and bring in building cases which are forced to utilized for built constructions.Finally,we give a solution project for problems proposed by introduction and draw a conclusion.