Evaluation Of Indoor Thermal Environment Based On Long-term Thermal Adaptation Of Human

The indoor thermal environment and thermal comfort of a building affect the health,happiness,efficiency.At present,the predictive mean vote and thermal adaptation model are mainly used to evaluate human thermal comfort in the world.However,these two models have certain limitations in terms of research objects,climate and building operation mode.Colleges and universities as the national science and technology support,not only has a high density of personnel,but also limited adjustable equipment to meet the comfort of the human body.As a national science and technology support,colleges and universities not only have a high density of personnel,but also limited adjustable equipment for human comfort.In order to accurately evaluate the thermal environment and thermal comfort of the human body in a mixed-mode building in colleges and universities,this article takes university students in Jiaozuo as a research object.the field study of indoor thermal environment and human thermal comfort were conducted.The differences of environmental parameters,subjective responses and clothing insulation of the subjects,and physiological parameters were analyzed,and the relationships between environmental,physiological,and psychological parameters were explored.A thermal sensation prediction model including physiological parameters in a real environment was established.The results of the following major studies:1)The maximum vertical temperature difference at three measurement points throughout the year and the average wind speed value without wind speed adjustment equipment all meet the limits specified by ASHRAE 55-2017.The indoor thermal environment under natural ventilation is relatively harsh in summer,the high summer wind speed(0.6m/s)effectively improves the human body’s thermal sensation.And adjustment equipment is needed to meet the thermal comfort needs of the human body.The increase of humidity has a negative effect on the thermal sensation of the subjects in summer and autumn with a temperature lower than the neutral environment(19.3℃),and is beneficial to the thermal sensation of the subjects in the indoor central heating environment in winter.2)The thermal sensation of the head and ankle has a greater impact on the overall thermal sensation.And the subject’s back,ankle,and calf are more likely to feel cold or cold at the same temperature in spring,summer and autumn.It is recommended to strengthen the lower body warmth in these three seasons or pay attention to personalized design For these sensitive parts.3)Neither the PMV prediction model nor the thermal adaptation model can well evaluate the thermal comfort of the human body in a mixed-running built environment.Through the principal component analysis method,a thermal sensation prediction model including temperature,humidity,wind speed,heart rate,skin temperature,and clothing thermal resistance is established,which can better predict the thermal sensation in the real environment.It provides reference for the establishment of thermal comfort standard,indoor thermal environment and parameter design of heating and cooling equipment in cold area.