81 performance data (cont), Cooling capacities, standard units (cont) – Bryant DURAPAC 551B User Manual
Page 81
81
PERFORMANCE DATA (cont)
COOLING CAPACITIES, STANDARD UNITS (cont)
Do not operate at these conditions.
LEGEND
NOTES:
1. Direct interpolation is permissible. Do not extrapolate.
2. The following formulas may be used:
where h
ewb
= enthalpy of air entering indoor coil
3. The SHC is based on 80 F edb temperature of air entering evaporator coil.
Below 80 F db, subtract (corr factor x cfm) from SHC.
Above 80 F db, add (corr factor x cfm) to SHC.
Correction Factor = 1.10 x (1 – BF) x (db – 80)
551B120 (10 TONS)
Temp (F)
Air Ent
Condenser
(Edb)
Temp (F) Air Entering Evaporator — CFM/BF
3000/0.31
3200/0.34
4000/0.46
5000/0.61
Temp (F) Air Entering Evaporator — Ewb
78
72
67
62
78
72
67
62
78
72
67
62
78
72
67
62
75
TC
152.7
140.3
129.4
115.0
153.1
141.2
130.4
118.1
154.9
145.2
134.0
122.1
158.1
147.5
136.6
125.3
SHC
46.7
65.6
82.2
97.4
47.3
66.7
84.4
101.5
49.8
71.3
93.1
113.5
51.0
77.9
103.7
124.7
kW
7.34
7.35
7.21
7.12
7.54
7.37
7.23
7.13
7.71
7.46
7.31
7.17
8.10
7.51
7.37
7.22
85
TC
150.5
137.7
125.3
110.0
151.5
138.9
126.6
113.6
142.6
130.6
117.7
144.6
133.3
122.3
SHC
44.7
65.0
81.2
95.2
44.9
66.3
83.6
99.7
71.0
92.8
112.0
76.9
103.1
122.2
kW
8.28
8.29
8.13
8.02
8.51
8.32
8.16
8.03
8.40
8.24
8.09
8.45
8.31
8.16
95
TC
147.7
133.8
120.7
103.0
135.1
121.9
107.2
138.8
125.8
112.8
141.7
128.5
118.5
SHC
43.9
63.9
79.6
92.2
65.2
82.0
97.0
70.6
91.5
109.7
76.9
102.5
118.4
kW
9.33
9.33
9.16
8.98
9.35
9.18
9.00
9.44
9.27
9.07
9.51
9.33
9.19
105
TC
128.7
115.4
96.5
129.8
116.6
99.7
133.7
120.3
107.1
136.7
122.8
114.5
SHC
62.3
77.6
89.4
63.6
80.2
93.5
69.4
89.6
106.8
76.0
100.6
114.3
kW
10.46
10.28
10.00
10.47
10.30
10.07
10.57
10.38
10.21
10.66
10.43
10.31
115
TC
123.2
109.1
90.8
124.3
110.3
92.2
127.9
114.4
100.8
130.9
116.8
110.1
SHC
60.4
75.1
86.6
61.9
77.8
90.0
67.6
87.6
100.7
74.6
98.7
109.9
kW
11.66
11.47
11.20
11.68
11.51
11.25
11.77
11.60
11.41
11.89
11.66
11.58
125
TC
117.5
101.8
86.2
118.5
103.0
87.4
121.6
107.1
96.0
124.1
110.3
104.8
SHC
58.5
72.5
84.5
60.0
75.0
87.3
65.8
85.1
96.0
72.5
96.9
104.8
kW
12.99
12.77
12.50
13.02
12.81
12.55
13.10
12.92
12.74
13.19
13.01
12.91
551B150 (12
1
/
2
TONS)
Temp (F)
Air Ent
Condenser
(Edb)
Temp (F) Air Entering Evaporator — CFM/BF
3750/0.08
4300/0.09
5000/0.11
6250/0.13
Temp (F) Air Entering Evaporator — Ewb
72
67
62
72
67
62
72
67
62
72
67
62
75
TC
167.1
154.3
142.0
169.8
157.7
144.8
173.5
160.6
148.4
176.5
164.5
153.3
SHC
82.5
103.5
123.6
85.8
109.7
132.0
90.3
117.7
141.9
98.2
130.7
153.1
kW
9.44
9.18
8.95
9.50
9.26
9.01
9.60
9.33
9.07
9.68
9.43
9.17
85
TC
162.3
149.3
135.6
165.1
152.5
139.6
168.8
155.3
143.5
172.1
159.2
149.3
SHC
80.9
101.4
120.9
84.4
107.9
129.9
89.6
115.8
139.8
97.6
129.3
149.1
kW
10.49
10.18
9.97
10.55
10.27
10.02
10.67
10.32
10.11
10.75
10.43
10.21
95
TC
156.5
143.7
126.3
159.6
146.8
131.3
162.3
149.8
136.5
166.5
153.2
144.5
SHC
79.1
99.5
116.5
83.0
106.1
126.0
87.6
114.2
135.8
95.8
127.7
144.4
kW
11.60
11.30
11.01
11.69
11.39
11.10
11.75
11.47
11.20
11.87
11.56
11.35
105
TC
150.0
136.2
115.7
153.0
139.3
120.9
155.6
142.5
128.5
158.8
145.9
138.8
SHC
76.5
96.7
111.2
80.8
103.5
120.0
85.7
112.3
128.4
93.6
125.9
138.7
kW
12.76
12.42
12.09
12.83
12.52
12.20
12.91
12.62
12.32
12.96
12.72
12.52
115
TC
141.8
122.2
104.4
144.3
126.1
110.8
147.7
129.4
118.9
150.7
135.2
130.1
SHC
73.6
91.2
104.2
77.9
98.5
110.8
83.4
107.3
118.4
91.8
121.9
129.9
kW
13.85
13.55
13.22
13.94
13.64
13.35
14.05
13.73
13.50
14.14
13.86
13.70
125
TC
132.5
108.6
93.9
134.8
111.4
100.7
137.6
114.4
106.6
140.3
122.9
120.1
SHC
70.9
85.7
93.8
74.9
92.9
100.7
80.2
101.4
106.5
89.0
116.3
120.1
kW
15.04
14.66
14.44
15.14
14.75
14.55
15.23
14.85
14.72
15.29
14.94
14.84
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 heat capacity (Btuh)
1.1 x cfm
t
lwb
= wet-bulb temperature corresponding to enthalpy of
air leaving indoor coil (h
lwb
)
h
lwb
= h
ewb
–
total capacity (Btuh)
4.5 x cfm
0TF
Q
0
04-
01
2
5
5
1
B
03
6-
15
0