Study On The Behavior Of Outdoor Human Heat Adaptation Clothing In Xi'an University

Clothing is the main way to adjust the thermal comfort of the human body,so the insulation model of clothing is also a hot topic in thermal comfort research.At present,the research on clothing insulation models is mainly concentrated indoors.There are relatively few studies on outdoor clothing thermal resistance models.The clothing insulation models established by most researchers do not screen people's subjective thermal sensations,so the predicted clothing insulation is the average dressing level of most people in a certain climate,not a "neutral" or ideal state.At present,research on the law of clothing in maintaining the neutral heat sensation of outdoor human body has not yet been fully studied.The outdoor climate conditions are uncontrollable,so there are fewer thermal comfort adjustment methods for people to choose.In response to the above,this research intends to conduct research in a university in Xi'an in the cold area on this basis.This article introduces the current research status and results of outdoor thermal comfort at home and abroad,briefly analyzes the influence of various factors on human thermal comfort,and focuses on the analysis of outdoor human adaptive clothing behavior.The article lists the indoor and outdoor adaptive clothing insulation models and the indoor neutral clothing insulation models established by the researchers in detail.This paper obtains basic research data through field measurement of outdoor thermal environment parameters of a university in Xi'an area,combined with subjective questionnaires filled out by subjects.Through the analysis of the survey data,the influence of outdoor thermal environment parameters on human thermal comfort was initially explored,the quantitative relationship between thermal environment parameters and outdoor human thermal sensation voting was established,and the expected voting and thermal adaptation behavior of outdoor humans were counted.Follow-up The focus is on the thermal adaptation behavior of adjusting clothing.Correlation analysis is used to determine the key environmental parameters that affect clothing insulation,and scatter diagrams are drawn to determine the law of clothing insulation changing with outdoor ambient temperature.Through multiple function comparisons,the functional relationship between clothing insulation and key parameters is fitted to establish adaptability.The clothing insulation model is used to reveal the behavioral laws of people adjusting the insulation of clothing in response to climate change;on this basis,the data that voted for thermal sensation as "neutral" are screened,and the neutral clothing insulation model is established in the same way.It is used to reveal the ability of clothing to compensate for the ambient temperature and to determine the insulation threshold of neutral clothing.The outdoor thermal comfort survey results show that: The average thermal sensation of the outdoor human body is positively correlated with the air temperature and black bulb temperature,and negatively correlated with the wind speed.The relationship between the average thermal sensation of the outdoor human body and the relative humidity needs to be studied.After analyzing the survey results of the thermal sensation adjustment methods filled in by the subjects,it is found that in autumn,clothing is an important way for people to adjust to outdoor thermal adaptation,while in winter,people's clothing insulation adjustment reaches its limit,so other thermal sensation adjustments the way.Both clothing models show that there is an negative correlation between clothing insulation and air temperature,and clothing insulation is different in gender distribution.The insulation of male clothing is lower than that of females.The upper and lower limits of the insulation threshold of outdoor neutral clothing are 1.54 clo and 0.53 clo,respectively.It can be seen that the insulation of clothing can satisfy the human body's outdoor neutral thermal sensation in a wide range.When the outdoor air temperature is between-1.6?31.7 ?,the insulation of neutral clothing is distributed between 0.53 clo ?1.54 clo,which can ensure the thermal comfort of 80% of the population.It can be seen that the insulation of neutral clothing can be in Compensate the temperature of the outdoor environment in a wide range.The research conclusions provide references for the design of climate-adaptive clothing.There are 29 pictures,21 tables,and 71 references.