Thermoregulation Model for Dynamic Thermal Responses in Floor-Cooling/Heating Radiation Environments

In this study, a multi-node human thermoregulation model (Y-model for short) suitable for non-uniform asymmetric radiation environment was developed, based on the Stolwijk and JOS-2 model. The model has 16 body segments, each consisting of four basic layers for core, muscle, fat and skin, and a customizable clothing layer. The influence of asymmetric radiation on human body was considered by the model. The radiation heat transfer between the outermost layer of each body segment and the environment can be calculated separately with the inner surface of the room through the view factor, and the contact thermal conductivity analysis between the feet and the floor was taken into account to adapt to the floor cooling/heating radiation environment. In addition, sensitivity analysis method was used to optimize local parameters. The validity of the model is verified by comparing with the experimental results of human thermal response under stable and transient conditions.