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Psychrometrics of Cooling
Turbine Inlet Cooling:ASME Turbo Expo 2011
Presented by: Annette Dwyer
Munters Corporation
![Page 2: Turbine Inlet Cooling · Psychrometrics of Cooling Turbine Inlet Cooling: ASME Turbo Expo 2011 Presented by: Annette Dwyer Munters Corporation](https://reader031.vdocuments.us/reader031/viewer/2022020215/5b5b8c337f8b9ac7498e4b8d/html5/thumbnails/2.jpg)
Psychrometrics
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10 20 30 40 50 60 70 80 90 100 110 120
Dry Bulb Temperature, Deg. F
0.000
0.005
0.010
0.015
0.020
0.025
0.030H
umidity
Ratio, lb M
oisture/lb Dry A
ir
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10 20 30 40 50 60 70 80 90 100 110 120
Dry Bulb Temperature, Deg. F
0.000
0.005
0.010
0.015
0.020
0.025
0.030H
umidity
Ratio, lb M
oisture/lb Dry A
ir
Rain or Fog
Saturation Line or
100% Relative Humidity
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10 20 30 40 50 60 70 80 90 100 110 120
Dry Bulb Temperature, Deg. F
0.000
0.005
0.010
0.015
0.020
0.025
0.030H
umidity
Ratio, lb M
oisture/lb Dry A
ir
100%
50%
20%
10%
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10 20 30 40 50 60 70 80 90 100 110 120
Dry Bulb Temperature, Deg. F
0.000
0.005
0.010
0.015
0.020
0.025
0.030
Hum
idityR
atio, lb Moisture/lb D
ry Air
100%
50%
10%
20%
10 20 30 40 50 60 70 80 90 100 110 1200.000
0.005
0.010
0.015
0.020
0.025
0.030
Cool Heat
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Dew Point Temperature (DP, ºF)The temperature at which existing moisture will condense from the air(forming dew)
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Wet Bulb Temperature
Dry
Bul
b Te
mpe
ratu
re
Dew Point Temperature
100%
RH
10%
2030
40
50
60
80
70
10 20 30 40 50 60 70 80 90 100 110 120
Dry Bulb Temperature, Deg. F
0.000
0.005
0.010
0.015
0.020
0.025
0.030H
umidity
Ratio, lb M
oisture/lb Dry A
ir
20%
30%
RH
40%
RH
50%
RH
60%
RH
80%
RH
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Measuring the Wet Bulb Temperature
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10 20 30 40 50 60 70 80 90 100 110 120
Dry Bulb Temperature, Deg. F
0.000
0.005
0.010
0.015
0.020
0.025
0.030H
umidity
Ratio, lb M
oisture/lb Dry A
ir
100%
50%
20%
10%
2030
40
50
60
80
70
Wet Bulb Depression = 108 - 66
660
1080
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10 20 30 40 50 60 70 80 90 100 110 120
Dry Bulb Temperature, Deg. F
0.000
0.005
0.010
0.015
0.020
0.025
0.030H
umidity R
atio, lb Moisture/lb D
ry Air
100%
50%
20%
10%
2030
40
50
60
80
70
Cooling = .90 X (108-66)
DIRECT EVAPORATIVE COOLING
70.2108
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10 20 30 40 50 60 70 80 90 100 110 120
Dry Bulb Temperature, Deg. F
0.000
0.005
0.010
0.015
0.020
0.025
0.030H
umidity R
atio, lb Moisture/lb D
ry Air
100%
50%
20%
10%
2030
40
50
60
80
70
780/91.6%
950/45%
1080/9%
70.20/81.2%
390/90%
680/20%
500 /87%
500/30%
A 90% Effective Evaporative Cooler Will Cool 90% of the Wet Bulb Depression
Regardless of the Starting Point
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Hum
idity Ratio, lb M
oisture/lb Dry A
ir
Mechanical Cooling
10 20 30 40 50 60 70 80 90 100 110 120
Dry Bulb Temperature, Deg. F
0.000
0.005
0.010
0.015
0.020
0.025
0.030
100%
50%
20%
10%
Warm Air Cool Air
2030
40
50
60
80
70
Chiller Coil
Las Vegas
Fort Myers
Chilled Coils
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1000/700
Indirect Evaporative Cooling
2030
40
50
60
80
70
10 20 30 40 50 60 70 80 90 100 110 120
Dry Bulb Temperature, Deg. F
0.000
0.005
0.010
0.015
0.020
0.025
0.030H
umidiity
Ratio, lb M
oisture/lb Dry A
ir
790 0
790/620
PrimaryAir Stream
10 20 30 40 50 60 70 80 90 100 110 1200.000
0.005
0.010
0.015
0.020
0.025
0.030
100%
50%
20%
10%
Secondary Air Stream Exhaust
Cold water
Warm water0 0Indirect /70100
/62
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INDIRECT - DIRECT EVAPORATIVE COOLING
1000/700
63.7/0/62 0790/6201000/700
2030
40
50
60
80
70
75.2060.50
63.7/0/62.00
10 20 30 40 50 60 70 80 90 100 110 120
Dry Bulb Temperature, Deg. F
0.000
0.005
0.010
0.015
0.020
0.025
0.030H
umidiity
Ratio, lb M
oisture/lb Dry A
ir
100%
50%
20%
10%Indirect
INDIRECTEVAPORATIVECOOLER
DIRECT EVAPORATIVECOOLER
Direct790/620
Direct Only
73º
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INDIRECT - DIRECT EVAPORATIVE COOLING WITH CHILLED WATER ASSIST
1000/700
64.4/0/60.50790/630 75.2060.501000/700
2030
40
50
60
80
70
75.2060.50
64.4/0/61.50
10 20 30 40 50 60 70 80 90 100 110 120
Dry Bulb Temperature, Deg. F
0.000
0.005
0.010
0.015
0.020
0.025
0.030H
umidiity
Ratio, lb M
oisture/lb Dry A
ir
100%
50%
20%
10%IndirectCoil
INDIRECTEVAPORATIVECOOLER
IDXOR CWICOIL
DIRECT EVAPORATIVECOOLER
Direct
790/630
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Psychrometrics of Cooling
Turbine Inlet Cooling:ASME Turbo Expo 2011
Presented by: Annette Dwyer
Munters Corporation