Sensory Evaluation Of Landscape Microclimate Comfort In Urban Environment In Hot And Humid Regions

Urban outdoor environment provides outdoor activities for residents in hot and humid climate regions,and its quality is related to the physical and mental health of individuals.Urban landscape environment is an important part of urban outdoor space,whose microclimate is a direct factor affecting human comfort.Through the summary of the research on thermal comfort at home and abroad,it is found that the existing outdoor thermal comfort evaluation refers to the index of indoor thermal environment of buildings,and actual measurement is the most common method used to evaluate the thermal environment.In this paper,on the basis of combing the existing researches of microclimate comfort evaluation,it constructs the sensory evaluation theory of microclimate comfort of urban landscape environment in hot and humid climate zone with the sensory evaluation theory.It explores the relation of the thermal perception and thermal comfort of human body in hot and humid climate,and makes a comparative analysis of thermal comfort index.The main research work and achievements are summarized as follows:Firstly,the theory construction of sensory evaluation of microclimate comfort.Through the analysis of the relationship between human sensory perception and urban landscape environment,it is found the landscape environment thermal perception model.In this paper,the basic process of sensory evaluation of microclimate comfort is presented,and the operation of its key influencing factors is described in detail.Secondly,the design of sensory evaluation scale of landscape microclimate comfort.Based on the landscape environment thermal perception model,through the analysis on the influencing factors of microclimate comfort to existing micro climate comfort evaluation index andthe basis of the existing subjective assessment scale,selection and quantitative elements,it builds 7 level evaluation scale of " Thermal Sensation,Radiation Sensation,Humidity Sensation,Draft Sensation,Comfort Sensation,Positive Sensation" and the corresponding 5 level preferred vote scale.The final scale integrates environment and individual information,and has carried on the appraisal.Thirdly,the experimental environment construction for sensory assessment of microclimate in landscape environment.Based on the concept of Living Lab,relying on the real outdoor thermal environment,it creates a real landscape space,so that the sensory perception obtained by the evaluators is closer to the actual situation.And it obtains the requirements and examples of creating experimental environment for sensory evaluation of microclimate landscape environment.Fourthly,the effectiveness of the sensory evaluation of microclimate comfort is proved through the experimental operation of the sensory evaluation of microclimate comfort of urban landscape environment in hot and humid climate zone.And it draws the following conclusions:1.Pleasure has the greatest influence on comfort,that is,thermal comfort is greatly influenced by psychological factors.In addition to humidity,other thermal perception factors have significant effects on comfort.2.By comparing the results of sensory evaluation with the results of thermal comfort index(UTCI/WBGT index),the thermal comfort index is evaluated.The results show that the UTCI index is more in line with the thermal sensation of human body in the outdoor environment in the hot and humid climate area in summer.3.By studying the thermal perception of different scene spaces,it is concluded that shading measures are the key strategies for microclimate regulation in hot and humid climate areas.