100
Chapter 5
Figure 5-9.
Refrigerant line velocities for “Freon” 502 refrigerant (reprinted by permission of DuPont
Fluorochemicals).
0.1
0.2
0.4
0.6
1
2
4
6
10
20
40
60
100
2000
3000
4000
6000
8000
10,000
BTU's Per HR
15
20
30
40
50
60
80
100
150
200
300
400
500
600
800
1000
1500
2000
3000
4000
5000
6000
8000
10,000
15
20
30
40
50
60
80
100
150
200
300
400
500
600
800
1000
1500
2000
3000
4000
5000
6000
8000
10,000
At 80
°
F Condenser
At 100
°
F Condenser
At 120
°
F Condenser
6
1
/8
"
1
5
/8
"
1
3
/8
"
1
1
/8
"
7 /8
"
3 /4
"
5 /8
"
1 /2
"
3 /8
"
5
1
/8
"
4
1
/8
"
3
5
/8
"
3
1
/8
"
2
5
/8
"
2
1
/8
"
-6
0
°
F
E
va
po
ra
to
r T
em
pe
ra
tu
re
-4
0
°
F
-2
0
°
F
0
°
F
20
°
F
40
°
F
D
is
ch
ar
ge
L
in
es
8
0
°
F
C
on
de
ns
er
10
0
°
F
C
on
de
ns
er
12
0
°
F
C
on
de
ns
er
Li
qu
id
L
in
e
Tons of Refrigeration
Velocity, Feet/Minute
EXAMPLE:
5.5 Tons at -40
°
F Evap. 85
°
F Cond.
2
5/8
" Suction Line Velocity = 1555 ft./min.
3/4
" Liquid Line Velocity = 105 ft./min.
NOTE: Liquid line determined
at 0
°
F evap. and 80
°
F
cond. Discharge lines
at 0
°
F evap. Net
refrigeration for "Freon"
502 includes suction gas
at 65
°
F.