209 performance data (cont), Cooling capacities — standard units (cont) – Bryant 581A/B User Manual
Page 209
209
PERFORMANCE DATA (cont)
COOLING CAPACITIES — STANDARD UNITS (cont)
LEGEND
NOTES:
1. Direct interpolation is permissible. Do not extrapolate.
2. The following formulas may be used:
tlwb = Wet-bulb temperature corresponding to enthalpy of air leaving evapo-
rator coil (hlwb)
Where: hewb = 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).
4. Use chart below for bypass factor.
581A180 (15 Tons)
Temp (F)
Air Ent
Cond
Evap Air — Cfm/BF
4500/0.01
5250/0.01
6000/0.01
Evap Air — Ewb (F)
54
58
62
67
72
76
80
54
58
62
67
72
76
80
54
58
62
67
72
76
80
60
TC
180.5 184.6 188.7 203.5 219.9 233.7
247
189.3 191.7 194.2 208.7 224.1
238
251
198.1 198.8 199.6 212.9 229.3
242
255
SHC
180.5 172.4 159.4 132.3 104.7
87.9
65.7
189.3 183.2 173.2 142.8 110.4
91
65.5
198.1 195.1 185.1 153.1 116.7
94
65.4
kW
9.41
9.49
9.58
9.87
10.19 10.47 10.78
9.58
9.63
9.68
9.97
10.29 10.57 10.87
9.75
9.77
9.79
10.07 10.39 10.67 10.95
70
TC
176.7 180.5 184.4
199
215.1 227.8
242
185.3 187.5 189.8
203
219.2 231.8
245
193
194.5 195.1 208.1 224.3
237
248
SHC
176.7
169
155.8 129.4 102.4
86
63.9
185.3 179.7 169.3 138.9
108
89.1
63.8
193
191.4
181
149.7 114.2
92.2
63.7
kW
10.5
10.57 10.64 10.96 11.35 11.62 11.95 10.68 10.72 10.76 11.06 11.45 11.72 12.04 10.85 10.87 10.89 11.17 11.55 11.82 12.13
75
TC
174.7 177.5
181
196
213
224.2
238
182.3 184.4
186
201
217
229.2
242
190.9 191.3
189
204
219
233.1
246
SHC
174.7 167.2
147
124
99
84.9
62.9
182.3 177.9
160
133
105
88
62.8
190.9 189.5
173
143
113
91
62.7
kW
11.07 11.14
11.2
11.6
12
12.23 12.57 11.25
11.3
11.3
11.7
12.1
12.33 12.66 11.45 11.45
11.4
11.8
12.1
12.44 12.75
85
TC
169.6 172.2
175
190
205
218.1 230.8 177.2
179
180
194
209
221.9 233.3 185.6 185.9
183
198
212
225.7
237
SHC
169.6 163.3
145
121
97
82.5
60.7 177.2 174.1
157
130
102
85.6
60.5 185.6 184.7
168
139
106
88.6
60.4
kW
12.29 12.35
12.3
12.7
13.1
13.5
13.86 12.47 12.51
12.5
12.8
13.2
13.61 13.96 12.67 12.68
12.6
12.9
13.3
13.71 14.05
95
TC
164.3 166.5
168
182
197
209.8 221.2 171.7 172.6
172
187
201
213.4 224.6 179.1 179.3
176
190
203
217.1
228
SHC
164.3 158.9
142
118
93
79.8
57.9 171.7 168.8
154
127
98
82.8
57.9 179.1 178.7
164
136
102
86
57.8
kW
13.59 13.65
13.5
13.9
14.3
14.85 15.23
13.8
13.82
13.6
14
14.4
14.96 15.32
14
14
13.8
14.1
14.5
15.07 15.43
105
TC
158.1 159.8
161
174
188
200.3 212.4 165.2
166
165
178
191
203.8 214.6 172.3 172.3
169
181
193
207.3 216.8
SHC
158.1 154.2
138
115
91
76.8
55.2 165.2 163.1
150
124
95
79.9
55.1 172.3 172.2
158
132
98
83
54.9
kW
14.97 15.02
14.8
15.2
15.6
16.28 16.69 15.19 15.21
14.9
15.3
15.7
16.39 16.77 15.41
15.4
15.1
15.4
15.7
16.5
16.86
115
TC
151.8 152.8
152
165
179
190.6 201.3 158.4 158.8
157
168
180
194
204.5
165
164.9
161
171
181
197.3 206.6
SHC
151.8 149.1
134
111
87
73.7
52.1 158.4
157
145
120
91
76.7
52.1
165
164.9
151
128
94
79.8
51.9
kW
16.45 16.48
16.1
16.5
16.9
17.79 18.21 16.68 16.68
16.2
16.6
17
17.91
18.3
16.89 16.88
16.4
16.7
17
18.01 18.39
125
TC
144.7 145.4
146
157.1 170.5 180.7 191.1 150.8 151.1 151.5 160.2 172.9 183.9
192
156.8 156.9
157
163.2 175.4 186.2 193.9
SHC
144.7 143.5 123.4 102.2 81.16
70.4
48.9 150.8 150.2 135.2 109.6 85.15
73.4
48.8
156.8 156.9 145.6 117.4
89.3
76.4
48.7
kW
17.96 18.01 18.05 18.49 18.99 19.44 19.85 18.18 18.22 18.25
18.6
19.11
19.5
19.89 18.42 18.44 18.46 18.72 19.14 19.65 19.93
581A180 (15 Tons) (cont)
Temp (F)
Air Ent
Cond
Evap Air — Cfm/BF
6750/0.01
7500/0.02
Evap Air — Ewb (F)
54
58
62
67
72
76
80
54
58
62
67
72
76
80
60
TC
203.8 204.2 204.6 216.3 231.7
244
257
209.5 209.5 209.6 218.8
235
248
259
SHC
203.8 201.8 191.2 164.1 124.1
97
65.4
209.5 209.5 196.6 173.7 138.1
100
65.2
kW
9.88
9.88
9.89
10.13 10.45 10.72
11
9.99
9.99
9.99
10.19 10.51 10.78 11.05
70
TC
199.6 199.8 200.1 210.5 226.5
239
250
205.2 205.1 205.1 213.8 228.8
241
252
SHC
199.6 197.8
187
159.7 121.3
95.2
63.5
205.2 205.1 192.4 169.8 134.5
98.2
63.5
kW
10.99 10.99
11
11.24
11.6
11.88 12.18 11.12 11.11 11.11 11.31 11.65 11.94 12.22
75
TC
196.4 196.6
194
206
220
235
247
201.9 201.9
198
208
223
237
249
SHC
196.4 195.7
181
153
120
94
62.5
201.9 201.9
186
163
163
97.1
62.5
kW
11.58 11.58
11.6
11.9
12.2
12.5
12.8
11.71
11.7
11.7
11.9
11.9
12.56 12.84
85
TC
191
191.1
188
200
213
227.8
239
196.4 196.4
192
202
214
229.8
241
SHC
191
190.5
175
148
115
91.6
60.2
196.4 196.4
180
157
119
94.6
60.2
kW
12.81 12.81
12.7
13
13.3
13.77
14.1
12.96 12.95
12.8
13.1
13.4
13.84 14.13
95
TC
184.4 184.5
181
192
205
219.1 229.7 189.7 189.7
185
194
206
221.1 230.5
SHC
184.4 184.2
170
144
108
88.9
57.7 189.7 189.7
174
153
113
91.9
57.6
kW
14.15 14.15
13.9
14.2
14.6
15.14 15.47 14.29 14.29
14
14.3
14.6
15.2
15.51
105
TC
176.7 176.7
173
182
194
209.2 218.5 181.9 181.9
177
184
194
211.1 220.1
SHC
176.7 176.7
162
140
103
86
54.9 181.9 181.9
166
148
107
88.9
54.7
kW
15.55 15.55
15.2
15.5
15.8
16.57
16.9
15.7
15.7
15.3
15.5
15.8
16.64 16.94
115
TC
169.5 169.4
166
172
183
198.2 207.1 173.9 173.8
169
174
183
200
208.6
SHC
169.5 169.4
155
136
98
82.7
51.8 173.9 173.8
158
142
101
85.6
51.7
kW
17.05 17.04
16.6
16.8
17.1
18.08 18.42
17.2
17.2
16.7
16.9
17.1
18.15 18.45
125
TC
160.9 161.1 161.2 165.6 177.4 187.9 195.4 165.1 165.2 165.4 167.8 179.2 188.6
196
SHC
160.9 161.1 150.7 125.6 95.04
79.4
48.7 165.1 165.2 155.2 133.2 105.3
82.3
48.6
kW
18.57 18.59 18.62 18.81 19.18 19.68 20.06 18.72 18.75 18.78 18.91 19.33 19.71 20.09
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
tldb = tedb –
sensible capacity (Btuh)
1.10 x cfm
hlwb = hewb –
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
CFM
ENTERING WET-BULB (F)
54
58
62
67
72
76
80
Bypass Factor
4500
0.396
0.193
0.054
0.053
0.067
0.000
0.000
5250
0.455
0.272
0.077
0.065
0.077
0.000
0.000
6000
0.504
0.337
0.121
0.077
0.088
0.000
0.000
6750
0.544
0.390
0.193
0.094
0.100
0.000
0.000
7500
0.578
0.436
0.244
0.108
0.114
0.000
0.000
5
81A1
55-
30
0