Experimental determination of coefficient of heat exchanges by convection of human body.

Colin, Johan; Houdas, Y

doi:10.1152/jappl.1967.22.1.31

Cited by 77 publications

(31 citation statements)

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“…Fig. 10 Comparison of equations for convective heat transfer coefficients (h c ) cited in ASHRAE (1993) with the present study's whole-body equation (Ichihara et al 1995;Gagge et al 1986;Seppänen et al 1972;Mitchell 1974;Colin and Houdas 1967…”

Section: Effects Of Wind Directionmentioning

confidence: 75%

Convective and radiative heat transfer coefficients for individual human body segments

Dear

Arens

Zhang

et al. 1997

International Journal of Biometeorology

365

168

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Human thermal physiological and comfort models will soon be able to simulate both transient and spatial inhomogeneities in the thermal environment. With this increasing detail comes the need for anatomically specific convective and radiative heat transfer coefficients for the human body. The present study used an articulated thermal manikin with 16 body segments (head, chest, back, upper arms, forearms, hands, pelvis, upper legs, lower legs, feet) to generate radiative heat transfer coefficients as well as natural-and forced-mode convective coefficients. The tests were conducted across a range of wind speeds from still air to 5.0 m/s, representing atmospheric conditions typical of both indoors and outdoors. Both standing and seated postures were investigated, as were eight different wind azimuth angles. The radiative heat transfer coefficient measured for the whole-body was 4.5 W/m 2 per K for both the seated and standing cases, closely matching the generally accepted whole-body value of 4.7 W/m 2 per K. Similarly, the whole-body natural convection coefficient for the manikin fell within the mid-range of previously published values at 3.4 and 3.3 W/m 2 per K when standing and seated respectively. In the forced convective regime, heat transfer coefficients were higher for hands, feet and peripheral limbs compared to the central torso region. Wind direction had little effect on convective heat transfers from individual body segments. A general-purpose forced convection equation suitable for application to both seated and standing postures indoors was h c =10.3v 0.6 for the whole-body. Similar equations were generated for individual body segments in both seated and standing postures.

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Section: Effects Of Wind Directionmentioning

confidence: 75%

Convective and radiative heat transfer coefficients for individual human body segments

Dear

Arens

Zhang

et al. 1997

International Journal of Biometeorology

365

168

View full text Add to dashboard Cite

show abstract

“…Colin et al [11] establish the air velocity of confronted airflow from the frontal coronal plane of a body at 0.15 m/s or less as a natural convection region. Rapp [23] defines the confronted airflow from the frontal coronal plane at 0.05-0.2 m/s as a combined convection region, 0.05 m/s or less as a natural convection region, and 0.2 m/s or more as a forced convection region.…”

Section: Ta Is Air Temperature [ºC] Air Velocity Is Mean ± Standard mentioning

confidence: 99%

“…Research focused on the impact of direction of airflow on the heat transfer from human body has been reported [11][12][13][14][15]. Colin and Houdas [11] examined the convective heat transfer coefficient of a human body to airflow from the foot direction of the body to the horizontal plane, and the lateral direction of the body to the sagittal plane, for a body in a dorsal position.…”

Section: Introductionmentioning

confidence: 99%

“…Colin and Houdas [11] examined the convective heat transfer coefficient of a human body to airflow from the foot direction of the body to the horizontal plane, and the lateral direction of the body to the sagittal plane, for a body in a dorsal position. de Dear et al [12] considered the convective heat transfer coefficient of human body in standing and seated posture to airflow from 8 horizontal directions, focusing on the frontal coronal plane of the body.…”

Section: Introductionmentioning

confidence: 99%

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Convective Heat Transfer Coefficients of the Human Body under Forced Convection from Ceiling

Kurazumi

Rezgals

Melikov³

2014

J Ergonomics

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“…The major studies on the α c s of the whole human body and of each of its parts are as follows: Coin et al 1) calculated the α c of the human body under thermal equilibrium, ignoring the heat exchange caused by heat transfer. Ignoring the effect of radiation, he evaluated only the convection of the human body by making the human skin temperature and the wall temperature of the experimental space the same.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Convective Heat Transfer Coefficient of the Human Body Using the Wind Tunnel and Thermal Manikin

Yang

Kato

Seo

2009

Journal of Asian Architecture and Building Engineering

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This study was conducted to determine the convective heat transfer rates (α c ) of each part of the human body and of the whole body when a human is in a standing or sedentary posture in an outdoor environment. A wind tunnel was used to reproduce the side wind in an outdoor environment, and a naked thermal manikin was used to control the detailed thermal characteristics of the human body. Accurate radiation analysis was employed to evaluate the radiation effect of the thermal manikin. The α c s of the whole body and of each part of the body increased along with the wind velocity in the standing and sedentary postures. In the standing position, the α c s of the head, feet, and hands, the terminuses of the human body, were about 20-30% higher than the average α c of the whole body. In the sedentary position, the α c s of the head, hands, and arms, the terminuses of the human body, were about 20% higher than the average α c of the whole body. The α c s in this study were lower than those obtained from the climate chamber. Meanwhile, they were similar to or slightly higher than those from the results in wind tunnels.

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Experimental determination of coefficient of heat exchanges by convection of human body.

Cited by 77 publications

References 0 publications

Convective and radiative heat transfer coefficients for individual human body segments

Convective and radiative heat transfer coefficients for individual human body segments

Convective Heat Transfer Coefficients of the Human Body under Forced Convection from Ceiling

Evaluation of the Convective Heat Transfer Coefficient of the Human Body Using the Wind Tunnel and Thermal Manikin

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