158 performance data, Cooling capacities – Bryant DURAPAC 551B User Manual
Page 158
158
PERFORMANCE DATA
COOLING CAPACITIES
LEGEND
NOTES:
1. Direct interpolation is permissible. Do not extrapolate.
2. The following formulas may be used:
t
lwb
= Wet-bulb temperature corresponding to enthalpy of air leaving evapo-
rator coil (h
lwb
)
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).
551A155 (13 TONS)
Temp (F)
Air Entering
(Edb
Evaporator Air Quantity — Cfm/BF
3600/0.03
4375/0.04
5000/0.05045
5625/0.06
6250/0.07
Evaporator Air — Ewb (F)
62
67
72
62
67
72
62
67
72
62
67
72
62
67
72
75
TC
134
145
153
137
148
156
141
149
156
144
151
157
147
152
157
SHC
111
93
72
124
103
77
130
109
77
134
114
79
137
119
79
kW
7.9
8.1
8.2
8.0
8.2
8.3
8.1
8.2
8.3
8.1
8.2
8.3
8.2
8.2
8.3
85
TC
130
140
147
133
142
149
136
144
149
139
145
150
141
146
150
SHC
109
90
68
120
97
72
127
106
73
130
110
76
132
112
76
kW
8.9
9.1
9.2
8.9
9.1
9.2
9.0
9.1
9.2
9.1
9.2
9.2
9.1
9.2
9.2
95
TC
125
134
141
128
136
142
131
138
142
133
138
142
136
139
142
SHC
106
87
66
117
94
69
122
99
71
124
104
72
127
108
73
kW
9.9
10.1
10.2
10.0
10.1
10.2
10.1
10.2
10.2
10.1
10.2
10.2
10.2
10.2
10.2
105
TC
120
129
134
123
130
134
126
131
134
128
132
135
129
132
135
SHC
104
85
63
114
91
67
117
95
67
119
100
68
120
105
70
kW
11.1
11.2
11.3
11.1
11.3
11.3
11.2
11.3
11.4
11.2
11.3
11.4
11.3
11.3
11.4
115
TC
114
122
127
117
123
127
120
124
127
121
124
127
122
125
127
SHC
100
81
60
109
87
62
111
93
64
113
95
66
114
98
66
kW
12.3
12.5
12.6
12.4
12.5
12.6
12.4
12.5
12.6
12.5
12.5
12.6
12.5
12.5
12.6
117
TC
108
115
118
122
124
127
123
124
126
123
124
127
124
125
127
SHC
98
78
57
89
77
64
91
79
64
91
80
66
92
81
66
kW
13.6
13.8
13.9
12.6
12.7
12.7
12.6
12.7
12.7
12.7
12.7
12.7
12.7
12.7
12.7
120
TC
112
119
123
114
119
123
116
120
123
117
120
123
118
120
123
SHC
100
80
59
106
85
61
108
89
62
109
92
64
110
96
64
kW
12.9
13.1
13.2
13.0
13.1
13.2
13.1
13.2
13.2
13.1
13.2
13.2
13.1
13.2
13.2
125
TC
109
115
118
111
115
119
113
116
119
114
116
119
115
116
119
SHC
98
79
57
103
84
59
105
88
61
106
90
64
107
93
63
kW
13.6
13.8
13.9
13.7
13.8
13.9
13.7
13.8
13.9
13.8
13.8
13.9
13.8
13.8
13.9
551A180 (15 TONS)
Temp (F)
Air Entering
Condenser
(Edb)
Evaporator Air Quantity — Cfm/BF
4500/0.02
5250/0.03
6000/0.04
6750/0.04
7500/0.05
Evaporator Air — Ewb (F)
62
67
72
62
67
72
62
67
72
62
67
72
62
67
72
75
TC
181
196
213
186
201
217
189
204
219
194
206
220
198
208
223
SHC
147
124
99
160
133
105
173
143
113
181
153
120
186
163
125
kW
11.2
11.6
12.0
11.3
11.7
12.1
11.4
11.8
12.1
11.6
11.9
12.2
11.7
11.9
12.2
85
TC
175
190
205
180
194
209
183
198
212
188
200
213
192
202
214
SHC
145
121
97
157
130
102
168
139
106
175
148
115
180
157
119
kW
12.3
12.7
13.1
12.5
12.8
13.2
12.6
12.9
13.3
12.7
13.0
13.3
12.8
13.1
13.4
95
TC
168
182
197
172
187
201
176
190
203
181
192
205
185
194
206
SHC
142
118
93
154
127
98
164
136
102
170
144
108
174
153
113
kW
13.5
13.9
14.3
13.6
14.0
14.4
13.8
14.1
14.5
13.9
14.2
14.6
14.0
14.3
14.6
105
TC
161
174
188
165
178
191
169
181
193
173
182
194
177
184
194
SHC
138
115
91
150
124
95
158
132
98
162
140
103
166
148
107
kW
14.8
15.2
15.6
14.9
15.3
15.7
15.1
15.4
15.7
15.2
15.5
15.8
15.3
15.5
15.8
115
TC
152
165
179
157
168
180
161
171
181
166
172
183
169
174
183
SHC
134
111
87
145
120
91
151
128
94
155
136
98
158
142
101
kW
16.1
16.5
16.9
16.2
16.6
17.0
16.4
16.7
17.0
16.6
16.8
17.1
16.7
16.9
17.1
120
TC
148
161
—
153
—
—
157
—
—
—
—
—
—
—
—
SHC
132
110
—
142
—
—
147
—
—
—
—
—
—
—
—
kW
16.8
17.2
—
16.9
—
—
17.1
—
—
—
—
—
—
—
—
125
TC
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
SHC
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
kW
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
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
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
0TF
Q0
04-
01
2
55
1A1
55-
1
8
0