Performance data, Cooling capacities, 37 performance data – Bryant 581C User Manual
Page 37
37
PERFORMANCE DATA
COOLING CAPACITIES
Standard Ratings
LEGEND
NOTES:
1. Direct interpolation is permissible. Do not extrapolate.
2. The following formulas may be used:
Where: h
ewb
= Enthalpy of air entering evaporator coil.
3. The SHC is based on 80 F edb temperature of air entering evaporator coil.
Below 80 F edb, subtract (corr factor x cfm) from SHC.
Above 80 F edb, add (corr factor x cfm) to SHC.
Interpolation is permissible.
Correction Factor = 1.10 x (1 – BF) x (edb – 80).
580F036 (3 TONS)
Temp (F)
Air Entering
Condenser
(Edb)
Air Entering Evaporator — Cfm/BF
900/0.11
1200/0.14
1500/0.17
Air Entering Evaporator — Ewb (F)
72
67
62
72
67
62
72
67
62
75
TC
42.8
38.9
35.0
44.8
40.8
37.0
45.8
41.9
38.2
SHC
20.0
24.5
28.7
21.8
27.5
32.8
23.0
30.0
36.0
kW
2.91
2.81
2.70
2.99
2.88
2.78
3.02
2.92
2.82
85
TC
40.8
36.9
33.3
42.5
38.7
35.0
43.6
39.9
36.1
SHC
19.4
23.7
27.9
21.0
26.8
31.8
22.6
29.7
35.1
kW
3.14
3.01
2.90
3.20
3.08
2.97
3.24
3.14
3.02
95
TC
38.7
34.9
31.4
40.4
36.6
33.0
41.4
37.6
34.1
SHC
18.6
22.9
27.0
20.3
26.0
30.9
22.0
28.8
34.0
kW
3.35
3.21
3.09
3.42
3.29
3.16
3.47
3.35
3.22
105
TC
36.5
32.8
29.2
38.1
34.3
30.9
39.0
35.2
32.4
SHC
17.8
22.1
25.9
19.6
25.2
29.8
21.2
28.0
32.3
kW
3.55
3.41
3.27
3.63
3.49
3.35
3.68
3.54
3.43
115
TC
34.3
30.7
26.9
35.7
32.1
28.8
36.5
32.9
30.6
SHC
17.0
21.3
24.8
19.0
24.4
28.8
20.5
27.1
30.6
kW
3.76
3.60
3.45
3.84
3.68
3.54
3.88
3.74
3.64
580F048 (4 TONS)
Temp (F)
Air Entering
Condenser
(Edb)
Air Entering Evaporator — Cfm/BF
1200/0.12
1600/0.15
2000/0.18
Air Entering Evaporator — Ewb (F)
72
67
62
72
67
62
72
67
62
75
TC
57.9
53.1
48.3
60.4
55.9
51.3
62.2
57.3
52.9
SHC
27.2
33.3
39.2
29.4
37.2
44.8
31.4
40.3
49.1
kW
4.07
3.93
3.79
4.17
4.03
3.90
4.24
4.08
3.96
85
TC
55.7
50.8
45.3
57.7
53.4
48.5
59.4
55.0
50.2
SHC
26.4
32.5
37.8
28.4
36.7
43.6
30.5
40.3
47.9
kW
4.40
4.24
4.08
4.47
4.35
4.20
4.54
4.42
4.25
95
TC
52.9
48.1
42.5
55.2
50.5
45.7
56.7
52.0
47.4
SHC
25.5
31.5
36.4
27.6
35.6
42.2
29.7
39.2
46.7
kW
4.70
4.54
4.36
4.78
4.63
4.47
4.87
4.70
4.56
105
TC
50.1
45.3
39.8
52.3
47.6
42.8
53.6
48.9
44.9
SHC
24.4
30.3
35.1
26.7
34.5
40.7
28.8
38.1
44.6
kW
5.00
4.81
4.62
5.10
4.91
4.73
5.17
4.99
4.84
115
TC
47.3
42.6
37.2
49.3
44.6
40.0
50.5
45.9
42.4
SHC
23.4
29.2
33.7
25.9
33.3
39.3
27.8
37.1
42.4
kW
5.30
5.07
4.88
5.42
5.19
4.99
5.48
5.28
5.12
580F060 (5 TONS)
Temp (F)
Air Entering
Condenser
(Edb)
Air Entering Evaporator — Cfm/BF
1500/0.07
2000/0.09
2500/0.12
Air Entering Evaporator — Ewb (F)
72
67
62
72
67
62
72
67
62
75
TC
71.0
63.8
55.4
74.5
67.2
59.2
76.5
69.7
62.1
SHC
33.9
41.5
47.9
37.4
47.4
55.8
40.6
52.8
61.8
kW
5.04
4.82
4.62
5.20
4.97
4.76
5.29
5.06
4.87
85
TC
69.2
61.0
54.2
72.9
65.6
57.2
75.2
68.1
61.5
SHC
33.4
40.5
47.3
37.0
46.9
54.9
40.1
52.3
61.3
kW
5.50
5.27
5.02
5.66
5.41
5.18
5.75
5.50
5.29
95
TC
65.5
56.6
50.4
69.4
60.9
53.1
71.2
63.3
57.8
SHC
32.1
38.8
45.6
35.8
45.3
52.6
39.1
50.9
57.8
kW
5.88
5.62
5.37
6.01
5.76
5.53
6.12
5.87
5.67
105
TC
61.9
53.1
47.1
65.4
56.6
50.5
67.1
58.8
54.5
SHC
30.8
37.5
44.1
34.5
43.7
50.2
37.9
49.3
54.5
kW
6.25
5.99
5.72
6.38
6.13
5.91
6.50
6.23
6.06
115
TC
58.2
49.7
43.7
61.4
52.3
47.8
63.0
54.3
51.2
SHC
29.5
36.1
42.5
33.2
42.1
47.8
36.7
47.6
51.2
kW
6.63
6.35
6.08
6.75
6.49
6.29
6.88
6.59
6.46
BF
— Bypass Factor
Edb — Entering Dry-Bulb
Ewb — Entering Wet-Bulb
kW
— Compressor Motor Power Input
Ldb — Leaving Dry-Bulb
Lwb — Leaving Wet-Bulb
SHC — Sensible Heat Capacity (1000 Btuh) Gross
TC
— Total Capacity (1000 Btuh) Gross
t
ldb
=
t
edb
–
sensible capacity (Btuh)
1.10 x cfm
t
lwb
=
Wet-bulb temperature corresponding to enthalpy of air leaving evaporator
coil (h
lwb
)
h
lwb
=
h
ewb
–
total capacity (Btuh)
4.5 x cfm
BYPASS
FACTOR
(BF)
ENTERING AIR DRY-BULB TEMP (F)
79
78
77
76
75
under 75
81
82
83
84
85
over 85
Correction Factor
.05
1.04
2.07
3.11
4.14
5.18
Use formula
shown below.
.10
.98
1.96
2.94
3.92
4.90
.20
.87
1.74
2.62
3.49
4.36
.30
.76
1.53
2.29
3.05
3.82
58
0
F
03
6-
15
1