Bryant 581A/B - Manual (Page 154)

154
PERFORMANCE DATA — 579F (cont)
COOLING CAPACITIES (cont)
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).
579F216 (18 Tons)
Temp (F)
Air Entering
Condenser
(Edb)
Evaporator Air Quantity — Cfm
5400 6000
Evaporator Air — Ewb (F)/BF
54/0.49 58/0.31 62/0.20 67/0.18 72/0.16 76/0.19 80/0.05 54/0.53 58/0.35 62/0.23 67/0.19 72/0.17 76/0.19 80/0.05
75
TC 194 198 206 223 243 260 277 200 203 210 227 246 263 —
SHC 194 178 169 146 121 99 79 200 191 177 152 125 102 —
kW 13.6 13.7 13.9 14.2 14.6 15.0 15.2 13.7 13.8 14.0 14.4 14.7 15.1 —
85
TC 189 192 200 217 235 252 269 195 195 204 220 239 255 —
SHC 189 176 166 143 118 97 76 195 195 174 149 123 100 —
kW 15.1 15.2 15.4 15.9 16.3 16.6 16.9 15.3 15.3 15.7 16.0 16.4 16.8 —
95
TC 183 184 193 209 227 243 — 189 190 196 212 230 246 —
SHC 183 181 162 140 115 94 — 189 190 170 146 120 97 —
kW 16.8 16.8 17.1 17.6 18.0 18.4 — 17.0 17.0 17.2 17.6 18.1 18.5 —
105
TC 177 178 185 201 218 234 — 183 185 189 204 221 237 —
SHC 177 178 159 137 112 91 — 183 185 166 143 116 94 —
kW 18.6 18.6 18.8 19.3 19.8 20.2 — 18.8 18.6 18.9 19.4 19.9 20.3 —
115
TC 171 171 177 192 209 224 — 176 177 181 195 212 226 —
SHC 171 171 154 133 109 88 — 176 177 161 139 113 90 —
kW 20.5 20.5 20.7 21.2 21.8 22.1 — 20.7 20.7 20.8 21.3 21.8 22.2 —
117
TC 170 170 176 191 207 222 — 175 175 180 193 210 224 —
SHC 170 170 154 132 108 87 — 175 175 160 138 112 90 —
kW 20.9 20.9 21.1 21.6 22.1 22.5 — 21.1 21.1 21.2 21.7 22.2 22.6 —
120
TC 168 168 173 188 204 — — 173 173 177 191 207 — —
SHC 168 168 152 131 107 — — 173 173 159 137 111 — —
kW 21.5 21.5 21.7 22.2 22.7 — — 21.7 21.7 21.8 22.3 22.8 — —
579F216 (18 Tons) (cont)
Temp (F)
Air Entering
Condenser
(Edb)
Evaporator Air Quantity — Cfm
7000 8000
Evaporator Air — Ewb (F)/BF
54/0.58 58/0.42 62/0.29 67/0.21 72/0.20 76/0.20 80/0.05 54/0.62 58/0.48 62/0.36 67/0.23 72/0.22 76/0.21 80/0.04
75
TC 209 209 215 232 251 268 — 216 217 221 236 255 272 —
SHC 209 209 189 162 132 106 — 216 217 198 171 138 109 —
kW 13.9 13.9 14.1 14.5 14.9 15.2 — 14.1 14.1 14.2 14.5 15.0 15.3 —
85
TC 203 204 209 224 243 260 — 211 211 215 228 247 263 —
SHC 203 204 185 159 129 103 — 211 211 192 168 135 107 —
kW 15.5 15.5 15.7 16.1 16.5 16.9 — 15.7 15.7 15.8 16.2 16.6 17.0 —
95
TC 197 197 202 216 235 251 — 204 204 209 220 238 254 —
SHC 197 197 180 156 126 100 — 204 204 185 165 132 104 —
kW 17.2 17.2 17.4 17.8 18.2 18.7 — 17.4 17.4 17.6 17.9 18.3 18.7 —
105
TC 191 191 195 208 225 241 — 197 197 202 211 228 244 —
SHC 191 191 175 152 123 97 — 197 197 177 161 128 100 —
kW 19.0 19.0 19.2 19.5 20.0 20.5 — 19.2 19.2 19.3 19.6 20.1 20.6 —
115
TC 184 184 188 199 215 230 — 190 190 194 202 218 — —
SHC 184 184 168 149 119 94 — 190 190 170 158 125 — —
kW 21.0 21.0 21.1 21.5 22.0 22.4 — 21.1 21.1 21.2 21.6 22.1 — —
117
TC 183 183 187 197 214 228 — 188 188 192 200 216 — —
SHC 183 183 166 148 118 93 — 188 188 171 157 124 — —
kW 21.3 21.4 21.5 21.8 22.4 22.7 — 21.5 21.5 21.7 22.0 22.5 — —
120
TC 180 180 185 194 210 — — 186 186 190 197 — — —
SHC 180 180 163 147 117 — — 186 186 172 156 — — —
kW 21.9 22.0 22.1 22.4 23.0 — — 22.1 22.1 22.2 22.5 — — —
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
0TF
Q004
-0
12
5
7
9
F
18
0-
300