Study On The Indoor Human Body Overall Comfort And Evaluation Model

Human comfort is developed on thermal comfort worldwide.And it gradually extends to luminous comfort and acoustic comfort.But the study of human comfort is still based on a single environment.With ISO proposing to put luminous environment and acoustic environment involved in the overall indoor environment quality requirements,more and more attention is paid to the study on the overall comfort.That is,the study of human comfort considering multiple factors has attracted increasing attention.In the environment of flight carbine and plateau train carriage,there is often the effect of low pressure on human comfort.With the development of human society and production,the overall comfort of this kind of environment is becoming more and more important.However,most of the experiment data found com from the nomal atmosphere indoor environment,and can not be used directly in some special cases.In addition,there is little research on the overall comfort of human body at present.The model is also relatively simple,and its universality needs to be verified.The researches on the overall comfort of human body under normal and low pressure are carried out.The main contents of this study are as the follows.Firstly,the physiological basis reflected of thermal comfort,luminous comfort and acoustic comfort on the surrounding environment is summarized.The propagation and reception characteristics of heat,optics and acoustics under standard atmospheric pressure are analyzed.The difference of thermal comfort,luminous comfort and acoustic comfort caused by low pressure is studied in combination with the physiological characteristics of different receptors.It provides a theoretical basis for experimental research.Secondly,according to the subjective evaluation characteristics of single factor comfort and the comprehensive evaluation thought of multiple factors,the utility function method is proposed as the research method of the overall comfort evaluation.The dimensionless functions of the evaluation model are obtained through the experimental study.The comfortable areas of single factor are obtained.At the same time,the "two pairwise comparison" is introduced into the judgment matrix of analytic hierarchy process.The importance ratio of single factor is obtained.On this basis,according to people's subjective response to extreme indoor environment conditions,the overall comfort evaluation model is obtained by using penalty substitution synthesis.Based on this evaluation model,the affected factors are compared and analyzed.The main influencing factors of the overall comfort degree are obtained.They are: operative temperature,illuminace and noise level.Moverer,the leading factors affecting the overall comfort degree are also studied.It is found that the more the influence factor deviates from the comfort zone,the greater the change of the overall comfort degree,which becomes the leading factor.The peak areas and the tolerable areas of the overall comfort are divided.It also provides a series of diagrams of comfort area for common working conditions.Finally,based on the physiological characteristics and experimental results of human comfort under atmospheric pressure and low pressure,the differences of thermal comfort,luminous comfort and acoustic comfort under different pressures are compared and analyzed.The comprehensive comfort evaluation model under 80 kPa is established by penalty substitution.The influencing factors and comfort areas of the evaluation model are discussed.According to the numerical relationship of comfort difference,the evaluation model under low pressure is modified.The expression of the overall comfort of human body under low pressure is explored.It has laid a theoretical foundation and technical basis for standard formulation and engineering design.