Experimental study on separation of convection heat transfer and radiation heat transfer between typical exposed human body parts and environment

Taking the manikin in thermal comfort condition as a study object, develops the heat transfer characteristic experiments between the typical exposed human body parts and the surrounding environment, such as head and face. Analyses the value ranges and the ratios of the radiation heat transfer to the convection heat transfer at different air supply temperature, air volume and air distributions. The results show that when the head and face are in steady thermal comfort state, their convection heat transfer and radiation heat transfer are 6 to 93 W/m2 and 26 to 60 W/m2 respectively, and the ratio of radiation heat transfer to convection heat transfer is 0.47 to 6.65. According to different air distributions, the personalized ventilation is dominated by the convection heat transfer while the mixed air distribution and the seat ventilation depend on the radiation heat transfer.