Theoretical And Experimental Study On Indoor Thermal Comfort Parameters

With the development of our society and life level, people put more focus on thermo-environment in our daily life. So thermo-environment research has an important meaning to building energy-saving and the establishment of building temperature- humidity environment standard.The essay is the research of indoor thermo-environment which mainly cares about the influence of environment temperature to psychology and physiology and the Human Thermal Comfort experiment is deployed in the condition of indoor environment. The parameters include psychological and physiological ones: the former ones are made up by the result of thermal-sensation and the later contains average temperature of body surface, body temperature, heart rate and blood pressure in a certain period. It examines the impact of the thermo-environment on the above-mentioned systematically, among which the impact of the thermo-environment on heart rate and blood pressure is its main concern. The impact of temperature on the above-mentioned parameters in different seasons and the changing features of parameters in different seasons under different temperatures and working situations are achieved, and the scope of different parameters is available. The outcomes in these experiments are the follows: the acceptable range of indoor thermo-comfort temperature for youngsters in summer is 24.3～31.5℃;the range of thermo-comfortable temperature under the average human surface temperature conditions is 26.1～30.4℃; the range of acceptable temperature under the skin impedance index is 24.2～30.3℃; the blood pressure index, etc.; the minimum environment temperature corresponding to normal blood pressure in summer is 21.7℃.Simulating the human body thermal comfort and indoor thermal environment through CFD software under the natural environments of different seasons, and verifying part of the experimental conclusions based on the simulation results. It's conducted that neutral temperature of human body thermal balance in summer is 29.1℃on the basis of mathematic theory of human body thermal balance, which is higher than the actual body neutral temperature in summer. That is to say, human thermal sensation is much more sensitive than physiology in the respect of the sensitivity to environment. Human thermal sensation responds to the environmental temperature much earlier than physiology.Application of fuzzy evaluation method is used in this essay for the research of parameter evaluation weighting, through which the corresponding physical and psychological parameters are got. Meanwhile, principal component analysis, a biomechanics is used in this process of verifying and inspecting the former results mentioned. The mathematic model"human psychological and physiological/indoor thermo--environment"is set up on the data of evaluation weighting method and result of chapter 3. The index as the comparative sample is used to identify the fuzzy integrated evaluation model.It's concluded through the study of this essay : enviromental temperatue has different impacts on the human beings'temperature feeling, average temperature of body surface, body temperature, heart rate, blood pressure and skin impedance. When the enviromental temperature rises, MSV, average temperature of body surface, heart rate and body temperature goes up, meanwhile, blood pressure and skin impedance comes down. The weight coefficients of each parameter after fuzzy evaluation are: MSV: 0.5010; average temperature of body surface: 0.1894; body temperature: 0.0692; heart rate and blood pressure: 0.0488; skin impedance: 0.1917. The analysis results of major ingredients proved the rationality of the conclusion of fuzzy evaluation. The mathematic model of human beings'psychology and physiology / indoor warm environment is proposed on this basis. The fuzzy comprehensive judgment model was validated by means of considering the index of forecasting average temperature feel as the sample, which could reach high precision upon optimization. The acceptable temperature range for male and female youths in summer is 23.0～30.0℃in consideration of psychological and physical factors.The end of the essay analyses the index of psychology and physiology and make out the acceptable degree under the different psychological position and physiological index and put forward the method of thermo-environment adaptation.