Tecumseh AEA4440YXA - Chapter 5: Installation and Replacement Information (Cont.); IV. Refrigerant Line Velocities

98 Chapter 5
IV. Refrigerant Line Velocities
Figure 5-7. Refrigerant line velocities for “Freon” 12 refrigerant (reprinted by permission of DuPont
Fluorochemicals).
0.1 0.2
2000 3000 4000 6000 8000
10,000
BTU's Per HR
0.4 0.6 1 2 4 6 10 20 40 60 100
15 20 30 40 50 60 70 80
100 150 200 300 400 500 600
1000 1500 2000 3000 4000 5000 6000 7000 8000
10,000
800 700
15 20 30 40 50 60 70 80
100 150 200 300 400 500 600
1000 1500 2000 3000 4000 5000 6000 7000 8000
10,000
800 700
At 80°F Condenser
EXAMPLE:
5.5 Tons at -40°F Evap. 85°F Cond.
3
1
/8
" Suction Line Velocity = 1916 ft./min.
3
/4
" Liquid Line Velocity = 94 ft./min.
At 100°F Condenser
At 120°F Condenser
6
1
/
8
"
-
6
0
°
F
E
v
a
p
o
r
a
t
o
r
T
e
m
p
e
r
a
t
u
r
e
-
4
0
°
F
-
2
0
°
F
0
°
F
2
0
°
F
4
0
°
F
8
0
°
F
C
o
n
d
e
n
s
e
r
5
1
/
8
"
4
1
/
8
"
3
5
/
8
"
1
3
/
8
"
3
/
4
"
5
/
8
"
3
1
/
8
"
2
5
/
8
"
2
1
/
8
"
1
5
/
8
"
1
1
/
8
"
7
/
8
"
O
.
D
.
T
y
p
e
L
C
o
p
p
e
r
T
u
b
i
n
g
1
/
2
"
3
/
8
"
Tons of Refrigeration
Velocity In Feet/Minute
1
0
0
°
F
C
o
n
d
e
n
s
e
r
L
i
q
u
i
d
L
i
n
e
D
i
s
c
h
a
r
g
e
L
i
n
e
s
1
2
0
°
F
C
o
n
d
e
n
s
e
r
NOTE: Liquid line determined at
0°F evap. and 80°F cond.
Discharge lines at 0°F
evap. Net refrigeration for
"Freon" 12 includes
suction gas at 65°F.