
with
Q
46
¼ TðP; 1Þ
ffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffi
ðC
4
0
2
C
42
Þ
2
I
2
52
þ I
2
52
ðC
2
4
0
2
þ C
2
42
Þ
ðC
4
0
2
C
42
Þ
4
s
ð2:28Þ
Outdoor airflow rate
Q
01
¼ Q
12
C
6k
C
1k
C
6k
C
0k
ð2:29Þ
where k ¼ 1 or 2 is recommended.
Q
01
¼
TðP; 1Þ
ðC
6k
C
0k
Þ
2
ffiffiffiffiffiffi
f
01
p
ð2:30Þ
where
f
01
¼ðC
6k
C
1k
Þ
2
ðC
6k
C
0k
Þ
2
Q
2
12
þ Q
2
12
½ðC
6k
C
0k
Þ
2
C
2
1k
þðC
6k
C
1k
Þ
2
C
2
0k
þðC
1k
C
0k
Þ
2
C
2
6k
External shortcut
Q
61
¼ Q
12
Q
01
¼ Q
12
1
C
61
C
11
C
61
C
01
¼ Q
12
C
11
C
01
C
61
C
01
ð2:31Þ
Q
61
¼
ffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffi
Q
2
12
þ Q
2
01
q
¼
TðP; 1Þ
ðC
61
C
01
Þ
2
ffiffiffiffiffiffi
f
61
p
ð2:32Þ
where
f
61
¼ðC
61
C
01
Þ
2
ðC
01
C
11
Þ
2
Q
2
12
þ Q
2
12
½ðC
61
C
01
Þ
2
C
2
11
þðC
11
C
61
Þ
2
C
2
01
þðC
01
C
11
Þ
2
C
2
61
Recirculation flow rate
Q
62
þ
Q
72
C
7k
C
3k
C
6k
C
3k
¼ Q
12
C
3k
C
1k
C
6k
C
3k
ð2:33Þ
Here again, it is recommended to use concentrations of tracer gas 2 (k ¼ 2).
Note that Q
62
is aliased with Q
72
, multiplied by a coefficient that is very
small for tracer 2, since only C
62
differs significantly from zero.
Q
62
¼
TðP; 1Þ
ðC
6k
C
3k
Þ
2
ffiffiffiffiffiffi
f
62
p
ð2:34Þ
where
f
62
¼ðC
6k
C
3k
Þ
2
ðC
3k
C
1k
Þ
2
Q
2
12
þ Q
2
12
½ðC
6k
C
3k
Þ
2
C
2
1k
þðC
6k
C
1k
Þ
2
C
2
3k
þðC
1k
C
6k
Þ
2
C
2
6k
Airflow Rates in Air Handling Units 29
Komentarze do niniejszej Instrukcji