The Study On The Human Thermal Comfort Model And Simulation Based On Individual Differences

With the improvement of living standards and the rapid development of science and technology,the study on the human thermal comfort has been paying great attention by the state and individuals.Due to individual differences,there will be differences in thermal comfort between people for people living in the same environment.How to create a healthy and personalized environment to improve human work efficiency has become the focus of thermal comfort research.This paper carried out the study on the thermal comfort model and simulation based on individual differences.The research results can be used to predict the thermal physiological parameters of individuals and evaluate human thermal comfort.Furthermore,it can provide theoretical guidance of the occupational safety and health and the development of personalized thermal protection equipment.The main work is as follows:First,the human thermal physiology experiments were conducted.The study sets a working condition close to a thermal neutral environment(25℃)and a high temperature environment working condition(35℃).The core temperature and skin temperature of subjects under different conditions were measured,and the experimental values were used as validation of human thermal physiological models based on individual differences and CFD coupling system.Secondly,the Gagge two node model was improved to establish a new human thermal physiological model based on individual parameters.Then,the new human thermal physiological model is combined with the PMV model to build a human thermal comfort model based on individual differences and the model is verified and applied.The results of simulation indicate that:the human thermal comfort model based on individual differences can accurately predict the physiological changes and thermal sensation of different individuals in the thermal environment.In addition,it is in good agreement with the experimental results verified by experiments.And compared with the Gagge two-node model,it is found that the skin temperature predicted by the new model under 40℃/50%case is more accurate.Finally,the thermal comfort model based on individual differences is embedded into Fluent software to establish the coupling system of CFD and human thermal comfort model,which can be used to determine the core and skin temperature and the heat loss of the human body through convection and radiation between human body and environment under indoor ventilation conditions.The experimental data in this paper were used to verify the coupling system in predicting skin temperature and core temperature.The study results show that:the simulated results of the coupling system in high temperature environment meet the experimental values well.