P.55 – KANOMAX 6501 series Climomaster User Manual
Page 56
55
What are Discomfort Index (DI) and Dew Point Temperature
(DT)?
＊＊What is DI and DT?＊＊
●
Discomfort Index (DI)
Discomfort Index is an index to show how uncomfortable it is in the summer
time.
CLIMOMASTER use the formula, shown below, which is used by
Meteorological Agencies.
）
（
（℃）
RH
Humidity
H:Relative
ure
T:Temperat
Where
T
H
T
DI
%
3
.
46
)
3
.
14
99
.
0
(
01
.
0
81
.
0
DI Scale
Comfortable
Little
Uncomfortable
Uncomfortable
Very
Uncomfortable
Cannot
Endure
68 70 75 80 86
●
There are many formulas to calculate Dew Point Temperature,
but for A531, we have adopted the most general “Antnione” formula,
which is used to calculate saturated vapor pressure.
235
)]
ln(
5614
.
23
/[
183
.
4030
:
:
:
%
:
100
322
.
133
)]
235
/(
183
.
4030
6686
.
18
exp[
e
DT
Pa
ure
VaporPress
e
Pa
re
aporPressu
SaturatedV
E
e
Temperatur
T
RH
midity
RelativeHu
H
Where
E
H
e
T
E
）
（
）
（
（℃）
）
（