gas plant process cooling via steam - gcc … · condenser lp steam header cogen. unit hp st....
TRANSCRIPT
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SGC
UT
ILIT
IES
Master Gas System
LRUGas
Treat
HPDGA
NGLPumps
FGC
Vent
C3 Comp.
Excess SteamCondenser
LP Steam HeaderCogen.Units
HP St. Header
+
Khuff Gas8% AG850 psig
AssociatedGas12% AG200 psig LP
HP
Inlet
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SGC
UT
ILIT
IES
Master Gas System
LRUGas
Treat
HPDGA
NGLPumps
FGC
Vent
C3 Comp.
Excess SteamCondenser
LP Steam HeaderCogen.Units
HP St. Header
+
Khuff Gas8% AG850 psig
AssociatedGas12% AG200 psig LP
HP
Inlet
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SGC
UT
ILIT
IES
Master Gas System
LRUGas
Treat
HPDGA
NGLPumps
FGC
Vent
C3 Comp.
Excess SteamCondenser
LP Steam HeaderCogen.Unit
HP St. Header
+
Khuff Gas8% AG850 psig
AssociatedGas12% AG200 psig LP
HP
Inlet
70-100 MPPH EXCESS LP STEAM
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SGC
UT
ILIT
IES
Master Gas System
LRUGas
Treat
HPDGA
NGLPumps
FGC
Vent
C3 Comp.
Excess SteamCondenser
LP Steam HeaderHRSG
HP St. Header
+
Khuff Gas8% AG850 psig
AssociatedGas15% AG200 psig LP
HP
Inlet
150 MPPH EXCESS LP STEAM
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• Generate Power or Drive Equip.
• Exhaust under Vacuum using CW.
• Design Flow Limitation
• Maintainability & Reliability
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• Use HP Steam as a Motive
• Design Challenge with the High
DP Between MP & LP steam.
• Limited Pressure, Flow, &
Applications.
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• Boiler Feed Water Heating to
Reduce Boiler Fuel Consumption.
• Low Temperature Difference
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GeneratorGeneratorCondenserCondenser
AbsorberAbsorberEvaporatorEvaporator
ChilledWater
CoolingWater
HeatSource
CW
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CoolingTower
Packaged Absorption Chillers
Condensate Return
Make up WaterChilled Water
System Components:
•Heat Rejection Unit (CT, HX, Aerial Cooler)
•Packaged Absorption Chillers
•Process Heat Exchangers
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COMPARED TO COMPRESSION REFRIGERATION:
More Reliable with More Stationary Equipment
Little Maintenance with Less Moving Parts
Generally Cheaper Especially When Utilizing Wasted Heat
Environmental Advantages (Less Carbon Footprint)
Not Sensitive to Load Variations
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Applications:
1.Utilization of Wasted Heat
2.High Power Cost Compared to Fuel
3.Robust & Unreliable Electrical Supply
4.Tri-Generation
5.Capturing Environmental Advantages
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• Objective of Application:
Reduce Excess Steam
1
Reduce Plant’s Energy Intensity
2
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• 5 Potential Process Applications for Absorption Refrig.
2
54
1
3
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• Cool Sweet Gas Using Chilled Water
• Bypasses on E-141 For Cooling Sweet Gas to SGC
PropaneComp.
2
1
3
Packaged Absorption Chillers
75#75#Coolin
gTower
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• Temperature limited by Hydrate Formation
• Propane Refrigeration System Limitation:
o High C3 Condenser Temperature
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• Preliminary Evaluation Revealed a Min. Temp of 85 F
• Additional Reduction Requires Major Revamp
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• Double Effect Design is Pressing for the Following:
o Reduce Heat Rejection requirement
o Reduce Make Up Water
• LiBr Provides Sufficient Chilled Water Temperature
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• Huge Heat Rejection
• Excessive Makeup Water
• Seasonality & Other Limitations
• Humidity & Elevations
• Economically Challenged
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• Promising Technology for Facilities with Excess LP Heat Source
• Economically Challenged in Deserted Areas
• Path Forward:
o Alternative Heat Sinks
o Further Evaluation of All Applications
o Value Engineering & Higher Capital Efficiency