Abstract: For studying the dynamic thermal reaction rule of occupants so as to enhance the thermal comfort in passenger compartment, with concurrent consideration of environmental parameters, body regulation, metabolism, clothing thermal resistance and other factors, a calculation method of coupling the interior thermal environment with human-body thermal regulation model is established, and the dynamic variations of average skin temperature of head, chest, arms and legs are calculated, with the heat regulation reaction and thermal comfort changing rule analyzed. The results show that the coupling calculation method can reliably analyze the dynamic thermal response and thermal comfort of occupants. When heating system is switched on, the interior thermal environment transiently changes and the skin temperature on different parts of occupant in different seating positions changes differently. In heat environment, the thermal regulation parameters of human-body, i.e. vasodilation and sweating increase, and hence heat is taken away from the body to maintain body temperature constant.

Key words: passenger compartment, human thermal comfort, human thermal regulation model