50
Table 29 – COOLING CAPACITIES 2--STAGE COOLING 10 TONS
48TC12 COOLING CAPACITIES, UNIT WITH HUMIDI---MIZER SYSTEM IN SUBCOOLING MODE
TEMP (F) AIR ENT
CONDENSER (Edb)
AIR ENTERING EVAPORATOR --- CFM
3000/0.04 4000/0.06 5000/0.07
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 142.85 129.44 116.93 152.09 138.44 125.76 157.99 144.23 132.06
SHC 58.38 74.88 91.58 67.96 89.45 111.02 76.63 102.94 127.93
kW 7.19 6.97 6.79 6.92 7.12 7.35 7.45 7.22 7.02
85
TC 132.33 119.68 107.86 140.92 128.03 116.10 146.41 133.41 121.98
SHC 48.44 65.56 82.83 57.37 79.50 101.68 65.65 92.58 118.12
kW 7.98 7.77 7.58 7.72 7.92 8.14 8.25 8.01 7.82
95
TC 121.41 109.52 98.43 129.35 117.22 106.04 134.43 122.20 111.50
SHC 38.19 55.92 73.78 46.47 69.22 92.01 54.34 81.92 107.96
kW 8.87 8.66 8.48 8.61 8.80 9.03 9.14 8.90 8.71
105
TC 110.04 98.92 88.56 117.27 105.94 95.53 121.88 110.46 100.54
SHC 27.59 45.94 64.39 35.16 58.57 81.98 42.56 70.82 97.40
kW 9.86 9.66 9.48 9.61 9.79 10.02 10.12 9.89 9.70
115
TC 98.09 87.74 78.13 104.62 94.08 84.45 108.76 98.13 89.01
SHC 16.52 35.47 54.53 23.37 47.44 71.46 30.32 59.25 86.31
kW 10.95 10.76 10.60 10.72 10.89 11.10 11.19 10.98 10.81
48TC12 COOLING CAPACITIES, UNIT WITH HUMIDI---MIZER SYSTEM IN 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
3000 4000 5000 3000 4000 5000 3000 4000 5000
80
TC 44.78 39.41 31.89 53.22 49.44 43.38 60.56 58.12 53.32
SHC --- 0.44 ---0.57 --- 0.69 --- 0.37 ---0.51 --- 0.61 --- 0.33 ---0.46 --- 0.56
kW 6.96 6.77 6.52 7.26 7.13 6.91 7.54 7.45 7.27
75
TC 45.84 40.46 32.86 54.28 50.51 44.45 61.61 59.19 54.40
SHC 0.53 0.40 0.29 0.60 0.47 0.37 0.64 0.52 0.42
kW 6.77 6.56 6.29 7.11 6.95 6.72 7.41 7.31 7.12
70
TC 46.91 41.48 33.50 55.36 51.59 45.50 62.69 60.28 55.49
SHC 1.51 1.38 1.27 1.57 1.45 1.35 1.61 1.50 1.40
kW 6.54 6.32 6.02 6.90 6.74 6.49 7.23 7.13 6.92
60
TC 48.88 43.42 35.76 57.29 53.56 47.48 64.56 62.16 57.42
SHC 3.44 3.34 3.24 3.51 3.40 3.31 3.55 3.45 3.37
kW 6.45 6.16 6.70 6.93 6.72 6.39 7.38 7.24 6.96
50
TC 50.83 45.28 37.67 59.22 55.52 49.43 66.05 64.03 59.34
SHC 5.38 5.29 5.20 5.45 5.36 5.28 5.48 5.40 5.33
kW 6.46 6.01 6.34 6.98 6.71 6.29 8.15 7.38 7.02
40
TC 52.82 47.29 39.50 61.14 57.48 51.39 68.23 65.88 61.25
SHC 7.32 7.24 7.20 7.38 7.31 7.24 7.43 7.36 7.29
kW 6.29 6.09 6.12 7.05 6.72 6.29 7.78 7.55 7.10
LEGEND
E d b --- E n t e r i n g D r y --- B u l b
E w b --- E n t e r i n g W e t --- B u l b
kW --- Compressor Motor Power Input
I d b --- L e a v i n g D r y --- B u l b
I w b --- 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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