93 performance data (cont), Cooling capacities, standard units (cont) – Bryant 581A/B User Manual
Page 93
93
PERFORMANCE DATA (cont)
COOLING CAPACITIES, STANDARD UNITS (cont)
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.
Correction Factor = 1.10 x (1 – BF) x (edb – 80).
581B072 (6 TONS)
Temp (F)
Air Ent
Condenser
(Edb)
Air Entering Evaporator — Cfm/BF
1800/0.05
2100/0.06
2400/0.06
3000/0.08
Air Entering Evaporator — Ewb (F)
72
67
62
72
67
62
72
67
62
72
67
62
75
TC
86.7
80.7
74.4
88.8
82.7
76.6
90.5
84.4
78.2
92.6
86.3
81.0
SHC
43.0
53.7
63.8
45.0
57.4
68.9
47.2
61.2
73.6
51.2
67.4
80.7
kW
4.58
4.46
4.33
4.63
4.50
4.38
4.67
4.55
4.41
4.72
4.58
4.47
85
TC
84.1
78.2
72.0
86.4
80.3
74.1
88.2
81.7
75.7
90.2
84.0
78.8
SHC
42.0
52.6
62.7
44.5
56.6
68.0
46.8
60.2
72.5
50.6
67.4
78.7
kW
5.10
4.97
4.85
5.16
5.03
4.90
5.21
5.06
4.93
5.26
5.12
4.99
95
TC
81.3
75.3
69.2
83.4
77.3
71.3
85.1
78.9
72.9
87.2
80.6
76.2
SHC
41.0
51.4
61.4
43.4
55.3
66.6
45.8
59.2
71.2
50.2
65.8
76.2
kW
5.65
5.52
5.39
5.71
5.57
5.44
5.77
5.62
5.48
5.83
5.66
5.55
105
TC
77.9
72.0
66.1
80.0
73.8
68.0
81.6
75.3
69.6
83.4
77.1
73.2
SHC
39.7
50.2
60.0
42.2
54.0
65.2
44.6
57.8
69.3
49.0
64.5
73.2
kW
6.22
6.08
5.94
6.29
6.13
6.00
6.34
6.17
6.04
6.40
6.22
6.12
115
TC
74.7
68.4
61.8
75.9
70.0
64.1
77.6
71.3
66.5
78.7
73.0
70.1
SHC
38.7
48.8
58.1
40.8
52.6
63.2
43.3
56.4
66.4
46.9
63.2
70.0
kW
6.84
6.68
6.49
6.87
6.71
6.56
6.93
6.75
6.63
6.96
6.80
6.72
125
TC
70.3
63.6
57.2
71.8
65.5
59.1
72.9
66.8
61.9
74.0
68.6
66.4
SHC
37.2
47.0
55.8
39.5
51.0
59.1
41.7
55.0
61.9
45.4
61.8
66.3
kW
7.43
7.25
7.03
7.48
7.30
7.13
7.51
7.35
7.22
7.54
7.41
7.33
581B090 (7
1
/
2
TONS)
Temp (F)
Air Ent
Condenser
(Edb)
Air Entering Evaporator — Cfm/BF
2250/0.10
3000/0.11
3750/0.14
Air Entering Evaporator — Ewb (F)
72
67
62
72
67
62
72
67
62
75
TC
105.5
96.9
87.6
107.3
99.6
90.7
110.3
101.9
93.8
SHC
50.6
63.6
75.7
53.3
69.2
83.7
58.0
76.6
92.2
kW
5.15
5.07
5.04
5.16
5.11
5.06
5.20
5.13
5.07
85
TC
102.5
93.6
83.6
105.1
96.5
87.5
107.7
99.0
90.6
SHC
49.7
62.4
73.9
52.8
68.4
82.2
57.3
75.9
90.0
kW
5.86
5.79
5.73
5.89
5.82
5.77
5.93
5.86
5.78
95
TC
98.9
90.1
79.3
101.6
92.9
83.5
103.8
95.3
87.4
SHC
48.5
61.2
71.9
51.9
67.2
80.2
56.2
74.9
87.3
kW
6.65
6.58
6.49
6.69
6.61
6.53
6.72
6.64
6.57
105
TC
95.3
86.2
75.7
97.6
88.8
79.6
100.0
91.0
84.1
SHC
47.3
59.6
70.2
50.7
65.9
78.0
55.3
73.6
84.1
kW
7.51
7.44
7.31
7.55
7.48
7.36
7.59
7.50
7.41
115
TC
91.0
82.0
71.6
93.2
84.5
75.4
95.6
86.6
80.7
SHC
45.9
58.0
68.1
49.3
64.2
75.3
54.2
72.1
80.7
kW
8.43
8.33
8.20
8.46
8.37
8.27
8.52
8.42
8.34
125
TC
86.2
77.8
68.1
88.3
80.0
71.9
90.0
81.9
77.2
SHC
44.1
56.4
66.3
47.5
62.6
71.8
52.1
70.1
77.2
kW
9.38
9.29
9.14
9.43
9.34
9.24
9.47
9.38
9.32
581B102 (8
1
/
2
TONS)
Temp (F)
Air Ent
Condenser
(Edb)
Air Entering Evaporator — Cfm/BF
2550/0.11
3000/0.12
3400/0.13
4250/0.17
Air Entering Evaporator — Ewb (F)
57
62
67
72
57
62
67
57
62
67
72
57
62
67
72
57
75
TC
94.6
101.0
110.0
119.2
100.4
104.4
113.4
121.8
104.2
106.8
115.8
123.4
109.8
111.0
119.0
125.8
SHC
94.6
84.4
69.4
54.4
100.4
92.4
75.0
57.2
104.2
99.0
80.0
59.8
109.8
110.4
89.4
64.2
kW
5.72
5.76
5.76
5.82
5.74
5.76
5.80
5.86
5.74
5.76
5.82
5.88
5.76
5.78
5.84
5.90
85
TC
91.0
97.4
106.8
115.8
97.4
101.0
110.0
119.6
101.2
103.0
112.0
121.6
108.0
108.0
116.0
123.4
SHC
91.0
83.0
68.8
53.2
97.4
91.2
74.2
57.0
101.2
97.6
78.8
59.6
108.0
108.0
89.4
64.2
kW
6.46
6.5
6.52
6.58
6.50
6.52
6.54
6.60
6.50
6.52
6.54
6.64
6.54
6.54
6.60
6.64
95
TC
85.2
91.4
103.0
112.8
93.4
96.6
106.2
116.0
98.2
99.2
108.4
117.8
104.6
104.6
111.6
121.2
SHC
85.2
80.4
67.2
52.6
93.4
89.4
73.0
55.8
98.2
96.2
78.2
58.8
104.6
104.6
88.0
64.6
kW
7.24
7.28
7.36
7.42
7.30
7.32
7.38
7.44
7.34
7.36
7.4
7.46
7.36
7.36
7.42
7.50
105
TC
80.0
82.2
98.6
108.6
87.0
87.8
101.6
111.8
93.4
93.6
103.8
114.0
101.0
100.8
106.8
116.6
SHC
80.0
76.6
65.6
51.2
87.0
85.6
71.6
54.8
93.4
93.2
76.6
57.8
101.0
100.8
86.8
63.6
kW
8.08
8.12
8.26
8.32
8.16
8.16
8.28
8.36
8.20
8.20
8.3
8.38
8.28
8.28
8.30
8.40
115
TC
73.6
74.6
89.4
103.4
81.0
81.2
95.2
106.4
86.2
86.2
98.4
108.4
96.4
96.4
101.6
111.8
SHC
73.6
73.0
62.2
49.6
81.0
81.2
69.4
53.0
86.2
86.2
75.0
56.4
96.4
96.4
85.4
62.8
kW
9.00
9.00
9.16
9.28
9.08
9.08
9.22
9.30
9.14
9.14
9.26
9.34
9.22
9.22
9.30
9.38
125
TC
68.6
68.6
80.2
98.2
74.4
74.4
84.0
101.0
79.2
79.2
86.8
102.8
88.0
88.0
93.8
105.6
SHC
68.6
68.6
59.0
48.0
74.4
74.4
65.4
51.6
79.2
79.2
71.0
54.6
88.0
88.0
82.8
61.0
kW
9.98
9.98
10.14
10.32
10.06
10.06
10.18
10.36
10.14
10.14
10.22
10.38
10.24
10.24
10.28
10.42
BF
—
Bypass Factor
Edb —
Entering Dry Bulb
Ewb —
Entering Wet Bulb
kW
—
Compressor Motor Power Input
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
5
81B0
36-
15
0