54
Table 33 – COOLING CAPACITIES 2--STAGE COOLING 15 TONS
48TC*E16 Cooling Capacities, Subcooling Mode
TEMP (F) AIR ENT
CONDENSER (Edb)
AIR ENTERING EVAPORATOR --- CFM
4500/0.02 6000/0.06 7500/0.05
A i r E n t e r i n g E v a p o r a t o r --- E w b ( F )
72 67 62 72 67 62 72 67 62
75
TC 204.4 186.3 168.2 218.4 199.6 180.9 229.6 210.4 191.2
SHC 98.9 118.1 137.2 114.8 133.7 152.6 127.6 146.2 164.9
kW 11.57 11.22 10.77 11.78 11.45 11.00 12.06 11.64 11.35
85
TC 189.2 171.7 154.1 203.0 184.8 166.7 214.1 195.5 176.9
SHC 79.5 103.4 127.3 96.5 120.2 144.0 110.2 133.7 157.3
kW 12.59 12.24 11.81 12.81 12.50 12.03 13.05 12.66 12.47
95
TC 174.0 157.0 140.0 187.6 170.1 152.5 198.6 180.6 162.7
SHC 60.0 88.7 117.5 78.2 106.8 135.3 92.9 121.3 149.7
kW 13.68 13.35 12.86 13.91 13.57 13.05 14.15 13.75 13.47
105
TC 158.8 142.3 125.8 172.2 155.3 138.3 183.1 165.7 148.4
SHC 40.5 74.1 107.7 59.9 93.3 126.7 75.5 108.8 142.0
kW 14.67 14.41 13.88 14.90 14.55 14.10 15.15 14.73 14.53
115
TC 143.6 127.6 111.7 156.8 140.5 124.1 167.6 150.9 134.2
SHC 21.0 59.4 97.8 41.6 79.9 118.1 58.1 96.3 134.2
kW 15.77 15.38 14.88 15.88 15.65 15.10 16.12 15.84 15.54
48TC*E 16 COOLING CAPACITIES, HOT GAS REHEAT MODE
TEMP (F) AIR ENT
CONDENSER Edb)
AIR ENTERING EVAPORATOR --- Ewb (F)
75 Dry Bulb
62.5 Wet Bulb
(50% Relative)
75 Dry Bulb
64 Wet Bulb
(56% Relative)
75 Dry Bulb
65.3 Wet Bulb
(60% Relative)
A i r E n t e r i n g E v a p o r a t o r --- C f m
4500 6000 7500 4500 6000 7500 4500 6000 7500
80
TC 83.75 84.85 88.95 86.65 91.90 92.90 87.90 91.75 96.30
SHC 37.50 42.80 55.10 30.90 40.40 44.50 24.80 29.30 34.10
kW 10.50 11.49 11.60 10.56 10.65 11.70 11.60 11.72 11.77
75
TC 85.00 86.00 90.50 88.05 93.60 94.65 89.20 93.45 97.85
SHC 40.00 45.00 57.30 33.20 42.30 46.90 26.90 31.50 36.30
kW 10.16 11.15 11.25 10.21 10.31 11.33 11.26 11.35 11.42
70
TC 86.15 87.35 91.50 89.20 94.30 96.10 90.40 94.10 98.95
SHC 42.10 47.50 59.80 35.50 45.30 49.50 29.50 33.90 38.70
kW 9.84 10.83 10.94 10.02 10.13 11.03 10.95 11.05 11.12
60
TC 88.90 90.10 94.25 92.00 97.10 98.20 93.20 96.90 101.75
SHC 46.80 52.30 64.60 40.20 50.10 54.10 34.10 38.60 43.40
kW 9.37 10.36 10.44 9.42 9.52 10.55 10.45 10.57 10.64
50
TC 91.70 92.80 97.00 94.80 99.90 101.00 96.10 99.70 104.20
SHC 51.50 57.10 69.40 44.80 54.80 58.90 38.70 43.20 49.00
kW 9.12 10.09 10.16 9.17 9.28 10.26 10.17 10.26 10.32
40
TC 94.45 95.60 99.80 97.45 102.55 103.70 98.65 102.35 107.00
SHC 56.30 61.40 73.70 49.70 59.20 63.30 43.60 48.10 52.90
kW 9.05 10.02 10.10 9.10 9.21 10.18 10.11 10.20 10.26
LEGEND
Edb --- E n t e r i n g D r y --- B u l b
Ewb --- E n t e r i n g W e t --- B u l b
kW --- Compressor Motor Power Input
Idb --- L e a v i n g D r y --- B u l b
Iwb --- L e a v i n g W e t --- B u l b
SHC --- Sensible Heat Capacity (1000 Btuh) Gross
TC --- Total Capacity (1000 Btuh) Gross
NOTES:
1. Direct interpolation is permissible. Do not extrapolate.
2. The f ollowing formulas may be used:
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
Where: h
ewb
= Enthalpy of air entering evaporator coil
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