Radiative Heat Balance of the Human Body in Radiative Cooling/Heating Rooms : Effective Radiation Area Factors of the Human Body and Configuration Factors between the Human Body and Rectangular Planes in Sideway Sitting, Leg-out Sitting, Lateral and Supine Postures

Abstract

The purpose of this paper is to offer the specific data for calculating the amount of heat exchange between the human body and environments by radiative heat transfer. Configuration factors between the naked human body and rectangular planes and effective radiation area factors of the naked human body for the following four body postures were measured: sideway sitting, leg-out sitting, lateral and supine postures. The results showed that the effective radiation area factor for the naked human body in the sideway sitting position was 0.613, the leg-out sitting position 0.642, the lateral position 0.722 and the supine position 0.792. Diagrams of configuration factors between the naked human body and rectangular planes were proposed for the combination of postures. The data of the following nine common body postures were compared: standing, chair sitting, seiza sitting, cross-legged sitting, sideway sitting, both-kneeserect sitting, leg-out sitting, lateral and supine postures, and the differences were clarified that it is notably influenced of postures. The configuration factors between the naked human body and rectangular planes showed clearly that it is strongly influenced in the length of median line and the size of the frontal plane that counter the surface of a wall.