Bryant 581C - Manual (Page 183)

183
PERFORMANCE DATA — 579F
COOLING CAPACITIES
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).
579F180 (15 Tons)
Temp (F)
Air Entering
Condenser
(Edb)
Evaporator Air Quantity — Cfm
4500 5250
Evaporator Air — Ewb (F)/BF
54/0.48 58/0.32 62/0.22 67/0.20 72/0.19 76/0.24 80/0.04 54/0.54 58/0.39 62/0.25 67/0.23 72/0.21 76/0.23 80/0.04
75
TC — 168 177 192 209 225 240 171 171 182 197 214 229 246
SHC — 152 142 123 103 85 69 171 150 151 130 108 88 69
kW — 12.4 12.6 13.0 13.3 13.6 13.9 12.5 12.6 12.7 13.1 13.4 13.7 14.0
85
TC 159 164 171 186 202 219 233 166 172 175 190 207 222 237
SHC 159 148 139 120 100 83 66 166 151 148 127 105 86 67
kW 13.7 13.8 14.1 14.4 14.8 15.5 15.4 13.9 14.0 14.1 14.5 14.9 15.2 15.5
95
TC 154 159 165 179 195 210 226 161 164 169 183 199 214 229
SHC 154 142 136 117 98 80 64 161 155 145 124 102 83 64
kW 15.3 15.4 15.5 15.9 16.3 16.7 17.3 15.5 15.5 15.7 16.0 16.5 16.8 17.1
105
TC 149 154 158 172 187 201 216 156 156 162 176 191 205 222
SHC 149 137 133 114 95 78 61 156 156 142 121 99 81 62
kW 16.9 17.0 17.1 17.6 18.0 18.4 18.7 17.2 17.1 17.2 17.7 18.1 18.5 19.1
115
TC 144 145 152 165 179 193 207 150 151 156 168 183 196 210
SHC 144 142 130 111 92 75 58 150 151 137 118 96 78 58
kW 18.6 18.6 18.9 19.3 19.8 20.2 20.6 18.9 18.9 19.0 19.5 19.9 20.3 20.7
117
TC 143 143 150 163 178 191 205 149 149 154 167 181 194 208
SHC 143 142 129 110 91 74 57 149 149 136 117 96 77 58
kW 18.9 19.0 19.2 19.7 20.2 20.5 20.9 19.2 19.2 19.4 19.8 20.3 20.7 21.0
120
TC 141 141 148 161 175 — — 147 148 152 164 179 — —
SHC 141 141 128 109 90 — — 147 148 135 116 95 — —
kW 19.5 19.5 19.8 20.2 20.7 — — 19.8 19.8 19.9 20.4 20.8 — —
579F180 (15 Tons) (cont)
Temp (F)
Air Entering
Condenser
(Edb)
Evaporator Air Quantity — Cfm
6000 6750
Evaporator Air — Ewb (F)/BF
54/0.58 58/0.43 62/0.30 67/0.25 72/0.23 76/0.24 80/0.04 54/0.62 58/0.48 62/0.36 67/0.28 72/0.25 76/0.25 80/0.03
75
TC 178 174 185 200 218 233 250 183 179 183 203 221 236 253
SHC 178 171 159 136 112 91 70 183 179 161 142 116 93 70
kW 12.7 12.7 12.8 13.1 13.5 13.8 14.1 12.8 12.7 12.8 13.2 13.5 13.9 14.1
85
TC 173 173 179 193 210 227 244 178 178 183 196 213 228 247
SHC 173 172 156 133 109 89 68 178 178 161 139 113 91 68
kW 14.1 14.1 14.2 14.6 15.0 15.8 16.2 14.2 14.2 14.3 14.7 15.1 15.3 16.3
95
TC 167 167 173 186 203 217 232 173 173 177 189 205 220 235
SHC 167 167 152 130 106 86 64 173 173 157 137 111 88 65
kW 15.7 15.6 15.8 16.1 16.6 16.9 17.2 15.8 15.8 15.9 16.2 16.6 17.0 17.3
105
TC 162 162 167 179 194 208 223 168 167 171 181 197 211 225
SHC 162 162 147 127 104 83 61 168 167 152 133 108 85 62
kW 17.3 17.3 17.4 17.8 18.2 18.5 18.9 17.4 17.4 17.5 17.9 18.3 18.6 18.9
115
TC 156 156 160 171 186 199 213 160 160 165 173 188 201 215
SHC 156 156 143 124 101 80 59 160 160 145 130 104 82 59
kW 19.1 19.1 19.1 19.6 20.0 20.4 20.7 19.2 19.2 19.3 19.6 20.1 20.5 20.8
117
TC 154 155 159 169 184 197 211 159 159 163 171 186 199 —
SHC 154 155 142 124 100 79 58 159 159 144 129 104 82 —
kW 19.4 19.4 19.5 19.9 20.4 20.8 21.1 19.6 19.6 19.7 20.0 20.4 20.8 —
120
TC 153 153 157 167 181 — — 157 157 161 169 — — —
SHC 153 153 140 122 99 — — 157 157 142 128 — — —
kW 19.9 19.9 20.0 20.4 20.9 — — 20.1 20.1 20.2 20.5 — — —
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
0.05 1.04 2.07 3.11 4.14 5.18
Use formula
shown below.
0.10 0.98 1.96 2.94 3.92 4.91
0.20 0.87 1.74 2.62 3.49 4.36
0.30 0.76 1.53 2.29 3.05 3.82
0.40 0.65 1.31 1.96 2.62 3.27
0.50 0.55 1.09 1.64 2.18 2.73
0.60 0.44 0.87 1.31 1.74 2.18
0.70 0.33 0.65 0.98 1.31 1.64
579
F18
0
-300