Simulation Of Thermal Comfort Control And Plant Selection For Green Poch(?) In Buildings

Since the global energy crisis in the 1970 s,the consideration of building energy conservation has changed from the discussion of energy consumption to the overall understanding of buildings and the environment.As an intermediary space between the interior and exterior environments of a building,the architectural poché plays a positive role in regulating indoor thermal comfort.Utilizing building poché regulation to improve indoor comfort can effectively reduce building energy consumption and achieve energysaving goals.In architectural poché,there is insufficient understanding of the regulatory role of plants,which cannot effectively guide the selection of plants for practical applications.This research proposes the concept of building green poché based on building poché,that is,through the service space in the building system that has ecological regulation functions and promotes the virtuous cycle of indoor and outdoor material energy,utilizing the regulation effect of plant ecological benefits on energy flow,efficiently and low-cost create a green poché space with a comfortable and pleasant internal environment.By combining theory and empirical research,this research aims to demonstrate the regulation of green poché in buildings on indoor comfort,and to explore the role of plant regulation while combining it with practical applications to provide a basis for plant selection.Theoretical research:Define green poché in buildings,Ecological design theory proposes a guided design approach to achieve harmony between architecture and the existing environment,integrating life forms within the biosphere in a friendly,close,and harmonious manner;The concept of architectural cavity in the ecological strategy of architectural cavity and formed a virtuous cycle structure by regulating the energy flow inside and outside the building environment;The thick walled space(poché)in ancient Western architecture breaks the metaphysical view of modern architecture and defines it as a space with auxiliary properties in architecture;The related theories of architectural bionics propose to imitate the structure or mechanism of the natural environment,and the architectural cavity can be used as the organ structure connecting the internal and external environment of the building.Method research:This article conducts a method study based on four steps,solving the outdoor thermal environment,simulating indoor thermal comfort,evaluating indoor thermal comfort,and comparing plant selection scenarios.During the simulation process,plants are considered as porous media models and classified based on their canopy and porosity characteristics,taking into account the regulation of energy flow by the shading and wind resistance effects of plants in green poché.Based on the principles of plant habitat,spatial characteristics,and suitable location and trees,qualitative analysis of the regulatory role of plants is conducted through the presence or absence of plants.Quantitative analysis of plant body characteristics is used to select plant applications.A combination of qualitative and quantitative analysis is used to design different types of scenarios for green poché in buildings,providing a theoretical basis for guiding plant selection.Empirical research: Taking the New Xiyuan Canteen building of Huazhong Agricultural University as the research object,the experiment shows that green pochéhave a significant regulatory effect on the indoor thermal comfort of buildings,and different tree crowns and porosity have different regulatory effects on the thermal comfort of each indoor layer.The experimental simulation results are as follows: for each floor of the building,the regulation effect on the first floor is the most obvious,while the regulation effect on the top floor is the smallest.As the number of floors increases,the regulation effect becomes smaller and smaller;For the plant crown shape,the overall thermal comfort regulation effect of the building is ranked from best to worst: oval column crown shape,semi oval crown shape,oval crown shape,oval cone crown shape.For the porosity of plants,the overall thermal comfort regulation effect of the building is in descending order: 0.6 porosity,0.3 porosity,and 0.9 porosity.Based on the above research results and combined with the actual situation of the building,suitable plant types were selected.Among them,the Osmanthus fragrans is the best tree species.The research results can provide design suggestions for optimizing green buildings to improve indoor comfort and reduce building energy consumption,help fully leverage the energy flow regulation role of green poché in buildings,optimize plant selection strategies,and provide reference for energy-saving construction and sustainable development of buildings.