Civil Engineering Reference
In-Depth Information
Fig. 3 Variation of the average annual temperature outdoors in Europe [
1
]
X
d
hs
¼
d
i
for
#
e
;
i
#
b
ð
1
Þ
i
where:
is number of days;
#
e
;
i
—
d
i
—
temperature of the external environment, average value for the respective
day;
#
b
—
12
C) sometimes called the balance point
is the base temperature
ð#
b
¼
temperature.
The average temperature during the heating season can be calculated with
relation:
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