Bryant DURAPAC 551B - Manual (Page 119)

119
PERFORMANCE DATA
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).
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).
559F180 (15 TONS)
Temp (F)
Air Entering
Condenser
(Edb)
Evaporator Air Quantity — Cfm/BF
4500/0.10 5250/0.12 6000/0.14 6750/0.15 7500/0.16
Evaporator Air — Ewb (F)
57 62 67 72 57 62 67 72 57 62 67 72 57 62 67 72 57 62 67 72
75
TC 164 177 193 212 171 181 197 216 178 184 202 220 183 188 204 224 188 190.2 206 226
SHC 164 146 124 100 171 157 132 105 178 169 140 111 183 176 147 116 188 185 157 120
kW 13.6 14.0 14.4 15.0 13.9 14.2 14.6 15.1 14.1 14.3 14.7 15.2 14.3 14.4 14.9 15.4 14.4 14.5 14.9 15.4
85
TC 159 170 186 204 166 174 190 208 172 178 194 212 178 181 197 216 182 183 199 218
SHC 159 142 120 98 166 152 129 102 172 163 137 107 178 172 144 112 182 180 151 117
kW 14.8 15.2 15.6 16.1 15.1 15.3 15.8 16.3 15.3 15.5 15.9 16.5 15.5 15.6 16.1 16.6 15.6 15.7 16.1 16.7
95
TC 154 163 178 195 160 167 182 200 166 170 186 204 171 173 189 206 175 175 190 208
SHC 153 139 117 94 160 148 126 100 166 158 133 104 171 168 141 109 175 175 147 113
kW 16.1 16.4 16.9 17.4 16.3 16.6 17.0 17.6 16.6 16.7 17.2 17.7 16.7 16.8 17.3 17.8 16.9 16.9 17.4 17.9
105
TC 148 155 170 186 154 159 174 190 160 162 177 193 164 165 179 196 168 168 181 197
SHC 147 135 114 91 154 144 122 96 160 155 130 101 164 163 137 105 168 168 143 109
kW 17.5 17.6 18.2 18.7 17.7 17.8 18.3 18.8 17.9 17.9 18.5 18.9 18.1 18.1 18.5 19.1 18.3 18.2 18.6 19.1
115
TC 142 148 162 176 148 151 165 180 153 153 167 183 157 157 169 185 161 160 171 187
SHC 142 131 111 88 148 140 118 93 153 150 126 97 157 156 133 102 161 160 140 106
kW 18.9 19.0 19.5 20.0 19.1 19.1 19.7 20.2 19.3 19.2 19.8 20.2 19.5 19.4 19.9 20.4 19.6 19.5 19.9 20.4
118
TC 140 145 159 173 146 148 162 177 151 151 164 179 155 154 166 182 158 158 168 183
SHC 140 130 110 87 146 139 117 92 151 148 125 96 155 154 131 100 158 158 138 105
kW 19.3 19.4 19.9 20.4 19.5 19.5 20.0 20.6 19.7 19.6 20.2 20.6 19.9 19.8 20.2 20.8 20.1 19.9 20.4 20.8
120
TC 139 144 157 171 144 147 160 — 149 149 162 — 153 153 164 — 157 156 166 —
SHC 139 129 109 86 144 139 116 — 149 147 124 — 153 153 130 — 157 156 137 —
kW 19.6 19.6 20.2 20.6 19.8 19.8 20.2 — 20.0 19.9 20.4 — 20.2 20.0 20.4 — 20.4 20.2 20.6 —
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
.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
559F216 (18 TONS)
Temp (F)
Air Entering
Condenser
(Edb)
Evaporator Air Quantity — Cfm/BF
5400/0.095 6000/0.105 7000/0.120 8000/0.140 9000/0.150
Evaporator Air — Ewb (F)
57 62 67 72 57 62 67 72 57 62 67 72 57 62 67 72 57 62 67 72
75
TC 180 191 211 231 186 194 213 235 193 198 218 239 200 202 221 243 206 206.6 223 245
SHC 180 165 138 111 186 173 145 115 193 187 155 121 200 199 166 128 206 206 175 133
kW 14.3 14.6 15.2 15.7 14.5 14.7 15.3 15.9 14.8 14.9 15.4 16.0 15.0 15.1 15.6 16.2 15.2 15.2 15.7 16.3
85
TC 175 184 202 224 180 187 206 226 188 191 209 231 194 194 213 234 199 199 215 237
SHC 175 161 135 108 180 170 142 112 188 183 152 119 194 194 162 125 199 199 172 131
kW 15.5 15.8 16.3 16.9 15.7 15.9 16.5 17.1 16.0 16.1 16.6 17.2 16.2 16.3 16.8 17.4 16.4 16.4 16.9 17.5
95
TC 169 176 194 214 174 179 196 217 181 183 200 222 187 187 203 224 192 192 205 226
SHC 169 158 132 105 174 166 138 109 181 178 149 115 187 187 159 121 192 192 168 128
kW 16.8 17.0 17.5 18.2 17.0 17.1 17.7 18.3 17.3 17.3 17.8 18.5 17.5 17.5 18.0 18.6 17.7 17.7 18.1 18.7
105
TC 163 168 185 204 168 171 187 207 175 174 191 209 180 180 193 213 185 184 194 215
SHC 163 154 128 102 168 162 135 106 175 174 145 112 180 179 154 118 185 184 164 124
kW 18.2 18.3 18.8 19.4 18.4 18.4 18.9 19.6 18.6 18.6 19.1 19.7 18.8 18.8 19.2 19.9 19.0 19.0 19.3 19.9
115
TC 157 160 176 194 161 162 177 196 167 167 180 198 172 172 182 200 177 176 183 203
SHC 157 150 125 99 161 157 131 102 167 167 141 108 172 172 151 114 177 176 160 120
kW 19.6 19.6 20.1 20.7 19.8 19.8 20.3 20.9 20.1 20.0 20.4 21.0 20.3 20.2 20.5 21.1 20.5 20.3 20.5 21.2
118
TC 155 158 174 192 159 160 175 194 165 165 178 196 170 170 180 198 174 174 181 200
SHC 155 149 124 98 159 156 130 101 165 165 140 107 170 170 150 113 174 174 159 119
kW 20.1 19.9 20.4 21.1 20.2 20.0 20.5 21.1 20.5 20.3 20.7 21.3 20.7 20.5 20.7 21.4 20.9 20.7 20.9 21.5
120
TC 153 155 171 — 158 158 172 — 164 163 175 — 169 168 177 — 173 172 178 —
SHC 153 147 123 — 158 155 129 — 164 162 139 — 169 167 149 — 173 171 157 —
kW 20.4 20.3 20.9 — 20.5 20.5 20.9 — 20.8 20.7 21.1 — 21.0 20.9 21.1 — 21.2 21.1 21.2 —
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
.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
0
T
F
Q
0
04
-0
12
55
9F1
80-
30
0