Digesters - Metropolitan Water Reclamation District of Greater Chicago

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Model Components – Plant Energy Demands• Model requires that plant heatdemands are satisfied• Summer and Winter heatdemand conditions• Accounts for boiler efficiency• Type of heating (i.e. steam or hotwater) is considered whensatisfying heat demandsDirect Gas to Plant Heating21 mmBtu/hrg 80% efficient Gas to AlternativeyPlantHeatingBoilers148 mmBHot Water to DIGs0 mmBtu/hr OSteam from Plant Boilers16 mmBtu/hrMBMFacilityTotal Plant Heat Demand40 mmBtu/hr
Model Components – Natural Gas Input• Natural gas from utility can beinput as additional energy• Natural gas to either plantheating and/or MBM• Variable amounts of natural gascan be provided to balance plantheating demands• Natural gas prices can be varied(as well as electricity prices)Natural Gas to Plant Heating%NG 0%0 mmBtu/hrNatural Gas to MBM Facility50 mmBtu/hrDirect Gas to Plant Heating21 mmBtu/hr80% efficientPlantHeatingBoilers• MBM contract pricing isconsidered
Page 1 and 2: Digester Gas Utilization at SWRPWhe
Page 3: Presentation Outline• Background/
Page 9 and 10: Projected Digester PerformanceVSR
Page 12 and 13: Digester Gas Production - Modeling
Page 15 and 16: Energy Consumption at SWRP• Build
Page 24 and 25: Energy Flow Scenarios:Digester Gas?
Page 26 and 27: Energy Flow Modeling Framework26
Page 28 and 29: Model Components - Gas Cleanings H2
Page 32 and 33: Projecting Future Energy Prices•
Page 34 and 35: Energy Flow Model - ScenariosScenar
Page 36 and 37: Energy Flow Model - Results$2,000,0
Page 38 and 39: Engine Operation Alternatives• Ba
Page 40 and 41: Updated Model Parameters• New Per
Page 42: Sensitivity Analysis - Electricity
Page 45 and 46: Triple Bottom Line Analysis• Econ
Page 47 and 48: Other Reference InstallationsMetrop
Page 49 and 50: Calls and Field Visits - Steam Turb
Page 51 and 52: Conclusions/Discussion• A Combine
Page 53 and 54: Sizing of Cogeneration SystemsCogen
Page 55 and 56: Triple Bottom Line ScoringScenario

Digesters - Metropolitan Water Reclamation District of Greater Chicago

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