Comfort Considerations in Net ZEBs: Theory and Design - Modeling, Design, and Optimization of Net-Zero Energy Buildings - page 112

(3.7)
(3.8)
(3.9)
- L conv is a function of the convective heat transfer coefficient ( h conv ),
which depends on the regime of convection around the body, the
clothing area factor ( f cloth ) and the difference between the temperature
of the external surface of the clothing ( T cloth ) and the ambient air
temperature ( T a )
(3.10)
where υ air is the relative air velocity.
- L rad depends on the effective radiation area of the human body, which
depends on its shape, and on clothing insulation. For general purposes,
it is used to approximate the effective radiation area of the human body.
The term T mrt is the mean radiant temperature, which is the “uniform
surface temperature of an imaginary black enclosure in which an
occupant would exchange the same amount of radiant heat as in the
actual nonuniform space” (ANSI/ASHRAE, 2010).
(3.11)
In order to estimate the body area of an individual upon which these
equations are based, the DuBois area ( A DB ) can be calculated. It is a
function of body weight ( w b ) and height ( h b ) (Du Bois and Du Bois,
1989):