Study On Thermal Comfort And Energy Dissipation Behavior Of Young And Old People In Changsha Area In Winter

China’s population aging is serious,the living environment of the elderly is closely related to the health.In addition,the university has a dense population,high energy consumption and abundant test samples,which can be used to study the effects of different scenarios and living habits on human thermal comfort and energy use.In the hot summer and cold winter areas,it is damp and cold in winter with no central heating.This study investigated the indoor thermal comfort and energy-using behavior of 55 households aged over 65 in Changsha and 847 young college students in winter.The indoor temperature,relative humidity,CO2 concentration and indoor pollutant content of the old people’s houses were tested,and the indoor thermal environment and thermal comfort of the old people in winter were investigated by questionnaire.In a university in changsha,dormitory areas,classrooms,libraries,offices and other public areas were selected for investigation,and indoor temperature,relative humidity,wind speed,black ball temperature,etc.were tested,and youth thermal comfort and energy use behavior questionnaire survey was conducted.The average temperature in the residence for the elderly is 11.17 ℃,while the average temperature in the dormitory area is 16.6 ℃,and the average temperature in the public area is 19.5 ℃,which is significantly higher than that in the residence for the elderly.The average thermal resistance of the elderly’s clothing is 1.69 clo,0.18 clo higher than that of the young people.In other words,the elderly are more inclined to improve their thermal comfort by adding clothing and other adaptive behaviors.By weighted fitting the average temperature in each temperature range with PMV and MTS,it was found that the actual thermal-neutral temperature in the elderly was19.32℃,and the lower limit of 80% acceptable temperature was 9.7 ℃,which was all lower than the predicted calculated value.The measured thermally neutral temperatures in university dormitories and public areas are 20.44 ℃ and 24.11℃respectively,indicating that young people have higher requirements for thermal environment.The heating equipment for the elderly is mainly independent radiator and electric heating equipment,while the heating equipment in the university is mainly air conditioning and small electric heating equipment.The overall opening time is longer than that of the elderly residence,and the opening time of the public area is longer than that of the dormitory area.Immediate thermal adaptation and the payment model will greatly affect household energy use habits.The priority of air conditioning can reflect the energy use habits of the population.Pearson correlation coefficient method is used to analyze the influencing factors,and three influential factors,namely,the source of students,the ac ceptability of not using air conditioning and the time of air conditioning,are obtained,and the influence of priority of air conditioning on ener gy use behavior and comfort are obtained.Energy Plus was used to simulate air conditioning patterns in public areas and dormitories,to study the factors affecting air conditioning energy consumption,and to find ways to provide both energy saving and thermal comfort.