Combined Heat & Power (CHP)
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Transcript of Combined Heat & Power (CHP)
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Combined Heat & Power (CHP)
Group Meeting #1January 29th, 2013
Michael BentelJeremy DavidErik Peterson
Arpit Shah
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OverviewAll energy will be processed through the CHP plantComponents of the CHP Plant
Gas and Steam Turbine Generation of ElectricityBoiler Production of various pressure steam (LP,MP,HP)
Natural gas from Gas Treating Plant and purge gases from Fischer Tropsch Liquids Refining Plant will be burned.
Plant water from *Team India* will be upgraded to the purity required for boiler feed water and steam turbine
CHP will provide plant and instrument air along with cooling water
All the electrical requirements will be met along with providing 50 MW electricity to the grid
Make up water will be taken from area wells, demineralized and filtered as required
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Group Meeting #1 ObjectivesReport Outlines EstablishedConceptual Process Block FlowDesign BasisCompeting ProcessesGroup Meeting #2 Objectives
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Outline 1. Design Basis √2. Block Flow Diagram √3. Process Flow Diagram4. Material and Energy Balance IN PROGRESS5. Calculations6. Annotated Equipment List (Data Sheet)7. Economic Evaluation factored from Equipment Costs8. Utilities9. Conceptual Control Scheme10. General Arrangement – Major Equipment Layout11. Distribution and End-use Issues Review12. Constraints Review13. Applicable Standards14. Project Communications File IN PROGRESS15. Information Sources and References IN PROGRESS
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Block Flow Diagram (BFD)
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Proposed BFD
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Evaporative Cooling Tower
Processes
Hot Return Water
Cold Supply Water Compressor
Dryer
Air
Compressed Air
Plant Air
Instrument Air
Water Purification
Processes
Boiler
Gas Turbine
Processes
Steam Turbine
Processes
Plant Water Superheated Steam
Natural Gas
Electricity
Hot Gases
BFW
LegendBFW = Boiler Feed WaterMP = Medium PressureLP = Low Pressure
Recycled Condensate
MP steam
LP steam
Condensate
Electricity
Condensate
BFW
Condensate
Condensate Drum
Natural Gas
Air
Effluent
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ComponentsTurbinesBoilersPumpsCompressorsEvaporative Cooling TowerWater Purification
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TurbinesTwo Turbine Types
Steam TurbineGas Turbine (i.e. Engine Turbine)
Majority of Electrical Production from Gas Turbine
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Turbine - Recycle Hot gas from Engine Turbine will be used to
heat the boiler Exhaust steam from Steam Turbine will be
used as a mid & low pressure steam sourceRemaining steam will be condensed and fed
back to the boiler feed water
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Boiler TypesWater - Tube BoilerFire - Tube BoilerFluidized Bed Combustion (FBC)
Atmospheric Fluidized Bed Combustion BoilerPressurized Fluidized Bed Combustion BoilerAtmospheric Circulating Fluidized Combustion Boiler
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Water-Tube BoilerModern boiler tube designs within 10,000-
265,000 lbs/hour capacityProduces high pressure steamUtilization of forced and induced drafts for
improved combustion efficiency Higher thermal efficiency shifts are possible
(~90%)Less tolerance for water quality calls for
water treatment plant to avoid scaling
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Boiler ConfigurationWater tube boilers are generally preferred in
high pressure/high steam applications High pressure steam is contained within
small diameter pipes which can withstand the pressure with a thinner wall
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Pumps/CompressorsIndustrial grade pump necessary to circulate
boiler feed water and condensate throughout the plant
Compressed air load is necessary in order to design air system
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Evaporative Cooling Tower (ECT)Provide low cost cooling
below the dry bulb ambient temperature
One of the most energy efficient methods of cooling
Evaporative Cooling Towers allow a small portion of the water being cooled to evaporate into a moving air stream which will provide significant cooling to the rest of that water stream.
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Water PurificationType of purification process is dependent on
types of impurities present in plant waterBoiler operation is completely dependent on
the purity of incoming waterPlant water must be cooled to meet the
requirements of the purification system
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Types of Purification ProcessesFiltrationEvaporationMembrane
Filtration + Electrodionisation Ultrapure Water
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Required InformationEnergy LoadSteam Load/Supply PressureCompressed Air LoadRecyclable Products (if applicable)Specific Team Requirements
Plant Water Composition (Team India)Natural Gas Production & Composition (Team
Alpha)Purge Gas and Steam Quantities (Team
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Future ObjectivesMake final decisions on system componentsFinalize CHP BFDProbe other units for desired load
requirements and waste product generation
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Questions
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