Fig.
4.
10.
Orientation
of
the Radiant Temperature
Asymmetry
Transducer
for
the calculation
of
Mean Radi-
ant
Temperature
42
Projected
area
factors
Position
of
person
Up/Down
Right/Left
Front/Back
Standing 0,08
0,23 0,35
Sitting
0,18 0,22 0,30
T00688GBO
Table.
4.4.
Projected area factors
for
a person, standing
and
sitting
The mean radiant temperature can then be calculated by multiplying the
six
measured
values by the relevant projection factors given in Table 4.4, adding the resultant data
and dividing the
result by the sum
of
the projected area factors. i.e.
for
a sitting person:
- 0,18
(tpr
[up] +
tpr
[down]) + 0,22
(tpr
[right] +
tpr
[left]) + 0,30
(tpr
[front] +
tpr
[back])
tr
=----~----~----------2-(0-,~18--+--0,-2-2-+~0,-3-0-)------~------~-----
and
for
a standing person:
- 0,08
(tpr
[up] +
tpr
[down]) + 0,23
(tpr
[right] +
tpr
[left]) + 0,35
(tpr
[front] +
tpr
[back])
t =
----~------~------------~------~----------~--------~-----
r 2 (0,08 + 0,23 + 0,35)
tr
= mean radiant temperature;
tpr
= plane radiant temperature.
Where the orientation
of
the person is
not
fixed, the average
of
the
Right/Left
and
Front/Back projected area factors is used.
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