Research On Indoor Thermal Environment And Human Thermal Comfort Of Minimum House Based On Different Activity Levels

" Energy saving emission reduction" and " green environmental protection"have always been the two main themes of people's attention in today's society.With its small construction area,low investment cost,high space utilization rate and personalized living environment,minimum house has achieved a great deal in terms of goals of energy saving,land saving and material saving,and demonstrates its unique advantages in realizing the sustainable development of buildings.The indoor thermal environment has a great impact on people's physical and mental health,and the level of human activity is an important factor in the indoor thermal environment.Compared with ordinary buildings,the effect of this influence will be magnified under the small space of minimum house.Therefore,this paper is designed tostudy the indoor thermal environment of the human body under different activity levels and the thermal comfort of the human body,and explore the influence of the different activity levels on the indoor thermal environment in minimum buildings and the thermal comfort of the human body undernatural ventilation condition.This paper studies the effects of different activity levels on indoor thermal environment and the feedback effect of indoor thermal environment on human thermal sensation and thermal comfort.The whole research is divided into two parts:experiment and simulation.The experimental part adopts the method of combining field test and questionnaires.The experiment was carried out in a manually constructed minimum house model in winter and summer.After the experimental data were processed and analyzed by statistical analysis software SPSS23.0,the following conclusions were drawn:1?In summer,with the increase of activity level,the indoor temperature gradually increases,and the relative humidity and air velocity gradually decreases,but the difference is not significant.In winter,both the indoor temperature and air velocity increases gradually with the increase of activity level.2?In summer,TSV and TCV have a certain linear correlation with activity level,and both of them are positively correlated linear relationship;TSV and TCV have a certain correlation with activity level in winter,TSV is positively correlated linear relationship and TCV is quadratic correlated relationship.3?In summer,as the level of activity increases,methods adopted by the majority of subjects to regulate the thermal sensation are bathing,shading,and drinking cold drinks.When people are on the level of no intensity and low intensity in winter,they mainly add clothes?drink hot drinks and do some exercise to adjust their thermal sensation;when people are on the medium and high intensity activity level,they tend to adjust their thermal sensation by opening doors and windows,reducing clothes and drinking cold drinks.4.Whether it's in summer or winter,as the level of activity increases,the thermal preference value of both men and women tend to decline.In the same thermal environment and the same level of activity,male subjects prefer a cooler thermal environment than female subjects.According to the physical model of the minimum house,the mathematical model of the minimum house under natural ventilation condition is established.The simulation results are in good agreement with the measured data,which proves the reliability of the numerical simulation.Through the simulation of indoor temperature and humidity,air velocity,the age of air,PMV and PPD under different activity levels in summer and winter,it's found that people feel diffcult to reach comfortable state under natural ventilation condition in summer,while people are relatively comfortable in low and medium intensity activity level in winter,but they are still uncomfortable when there is no intensity and high intensity of activity.Therefore,we try to add different sizes of cold and heat sources in the house to make people feel comfortable after theoretical calculation,and verify it by simulation again.The results show that the indoor thermal environment and human thermal comfort have been significantly improved after adding cold and heat sources.This paper aims to study the influence of different activity levels on the thermal environment of minimum house through experiments and numerical simulations for establishing the relationship between human activities and the indoor thermal comfort of minimum house,trying to provide a reference for designing the thermal environment and human body thermal comfort of this type of building.