—5—
GROSS COOLING CAPACITIES (MBH) Continued
CFM
— Cubic Ft per Minute
EWB
— Entering Wet Bulb (°F)
LWB
— Leaving Wet Bulb (°F)
TC
— Total Cooling Capacity 1000 Btuh
SHC
— Total Sensible Capacity 1000 Btuh
BF
— Bypass Factor
MBH
—1000 Btuh
NOTES:
1. Contact manufacturer for cooling capacities at conditions other than
shown in table.
2. Formulas:
Leaving db = entering db —
Leaving wb = wb corresponding to enthalpy of air leaving coil (h
LWB
)
h
LWB
= h
EWB
—
where h
EWB
= enthalpy of air entering coil.
UNIT
SIZE
INDOOR COIL
AIR
SATURATED TEMPERATURE LEAVING EVAPORATOR (°F)
30
35
40
45
50
CFM
EWB
TC
SHC
BF
TC
SHC
BF
TC
SHC
BF
TC
SHC
BF
TC
SHC
BF
A060
N060
T060
1600
72
101.0
46.7
0.00
90.8
42.2
0.00
80.4
37.6
0.12
69.1
33.0
0.08
56.0
28.0
0.07
67
83.8
49.9
0.07
73.5
45.2
0.07
63.1
40.5
0.06
51.1
35.3
0.06
38.0
29.8
0.08
62
68.7
53.0
0.07
58.2
48.0
0.07
47.7
43.0
0.07
38.2
37.6
0.11
31.6
31.6
0.24
2000
72
113.0
52.2
0.00
102.0
47.4
0.00
90.4
42.6
0.14
77.5
37.5
0.11
63.5
32.3
0.10
67
94.0
56.8
0.10
82.6
51.8
0.10
71.2
46.8
0.09
58.5
41.3
0.10
43.7
35.2
0.11
62
77.0
61.2
0.09
66.0
56.0
0.10
55.1
50.7
0.10
45.0
44.7
0.15
37.3
37.3
0.28
2400
72
123.0
56.6
0.26
111.0
51.6
0.21
98.4
46.7
0.16
84.2
41.2
0.13
69.4
35.8
0.13
67
103.0
62.8
0.13
89.9
57.4
0.13
77.3
52.0
0.12
64.3
46.5
0.12
48.3
40.0
0.14
62
83.0
68.4
0.11
72.2
63.0
0.12
61.4
57.5
0.13
51.1
51.1
0.18
42.5
42.5
0.32
X060
1600
72
106.0
49.0
0.00
94.4
44.0
0.00
83.1
39.0
0.07
71.6
34.3
0.05
58.4
29.1
0.06
67
85.7
51.3
0.05
75.4
46.5
0.05
65.1
41.7
0.05
52.9
36.4
0.05
39.8
30.9
0.07
62
70.8
54.8
0.04
59.6
49.2
0.05
48.4
43.7
0.06
38.0
37.2
0.13
31.1
31.1
0.26
2000
72
116.0
53.7
0.18
105.0
49.2
0.14
94.7
44.7
0.10
81.6
39.5
0.08
67.3
34.0
0.08
67
97.6
59.1
0.07
86.1
54.0
0.07
74.5
48.8
0.07
61.4
43.1
0.07
46.4
36.9
0.09
62
80.0
64.0
0.05
68.4
58.1
0.07
56.8
52.1
0.09
45.0
44.7
0.16
37.4
37.4
0.29
2400
72
128.0
59.4
0.17
116.0
54.4
0.15
104.0
49.4
0.12
89.9
43.9
0.10
74.1
38.0
0.10
67
108.0
66.0
0.09
94.7
60.4
0.09
81.8
54.7
0.10
67.9
48.8
0.10
51.9
42.3
0.11
62
86.4
71.3
0.08
75.0
65.4
0.10
63.6
59.5
0.12
52.1
52.1
0.17
43.3
43.3
0.31
sensible heat cap.
1.09 x CFM
total capacity (Btuh)
4.5 x CFM
3. Direct interpolation is permissible. Do not extrapolate.
4. SHC is based on 80°F db temperature of air entering coil.
Below 80°F db, subtract (Correction Factor x CFM) from SHC.
Above 80°F db, add (Correction Factor x CFM) to SHC.
5. All data points are based on 10°F superheat leaving coil.
6. Bypass Factor = 0 indicates no psychometric solution. Use bypass
factor of next lower EWB for approximation.
Interpolation is permissible.
Correction Factor = 1.09 x (1 – BF) x (db – 80)
BYPASS
FACTOR
ENTERING AIR DRY BULB TEMPERATURE (°F)
79
78
77
76
75
Under 75
81
82
83
84
84
Over 85
Correction Factor
0.10
0.98
1.96
2.94
3.92
4.91
Use formula
shown below
0.20
0.87
1.74
2.62
3.49
4.36
0.30
0.76
1.53
2.29
3.05
3.82
Содержание CK5A
Страница 7: ...7...
