Abstract
The purpose of this paper is to propose the empirical formula of convective heat transfer coefficient of the whole body in natural convection. Experimental posture was leg-out sitting position. Experiments were conducted under the following conditions in a artificial climate chamber by using a thermal manikin. Air temperature was set to six cases (t_a=16, 18, 20, 22, 24, 26℃). Wall, floor and ceiling temperatures were set to equal air temperature (mrt=t_a). Relative humidity and air velocity were kept constant level of 50% and less than 0.2m/s. The following results were obtained. The radiative heat transfer coefficient with leg-out sitting posture was 3.555W/(M^2・K). The empirical formula of the convective heat transfer coefficient of the whole body with leg-out sitting posture was represented hc=1.0022ΔT^<0.409>[W/(m^2・K)] where the power of the difference between the mean skin temperature corrected by convective heat transfer area and air temperature (ΔT[K]).
