Presentation on theme: "Becoming DEEP Green with Just One Project: Cogen Tom Davies – Director Design & Construction, Amherst College Todd Holland – Energy Manager, Amherst,"— Presentation transcript:
Becoming DEEP Green with Just One Project: Cogen Tom Davies – Director Design & Construction, Amherst College Todd Holland – Energy Manager, Amherst, Mount Holyoke & Smith Colleges
The Bottom Line(s) Reasonable pay-back Huge CO2 reduction Fuel flexibility and standby power But...... Large first cost
Why Go Green? Many flavors of climate commitment: Kyoto Protocol Clean Air/Cool Planet a.k.a. The New England Governors and Eastern Canadian Premiers’ Climate Change Action Plan Step It Up Presidents Climate Commitment a.k.a. American College & University Presidents Climate Commitment
DISTRIBUTION SYSTEM (Eff. = 95%) STEAM TURBINE (Eff. = 42%) BOILER (Efficiency = 83%) CONDENSER 72 Units 22 Units 25 Units 23 Units High Pressure Steam 60 Units 72 Fuel Source units yields: 22 Units of Electricity GENERATOR (Eff. = 92%) 35 Units Electric Efficiency: 30% Conventional Power Plant:
73 Fuel Source units yields: 58 Units of Thermal Energy 73 Units Heat to Campus 58 Units BOILER (Efficiency = 80%) Thermal Efficiency: 80% Conventional Heating Plant:
73 Units Heat to Campus 58 Units BOILER (Efficiency = 80%) Overall Efficiency: 55% 145 Fuel Source units yields: 22 Units of Electricity 58 Units of Thermal Energy DISTRIBUTION SYSTEM (Eff. = 95%) STEAM TURBINE (Eff. = 42%) BOILER (Efficiency = 83%) CONDENSER 72 Units 22 Units 25 Units 23 Units High Pressure Steam 60 Units GENERATOR (Eff. = 92%) Conventional Heat & Power:
100 Fuel Source units yields: 22 units electricity 58 units thermal energy Cogen = Combined Heat & Power: 58 Units Overall Efficiency: 80% GENERATOR (Eff. = 92%) 100 Units 24 Units 22 Units GAS TURBINE (Efficiency = 24%) HEAT RECOVERY STEAM GENERATOR Steam to Campus 76 Units
Cogen configuration Fuel cost and availability: natural gas, diesel, or both Year-round or seasonal operation Are you thermally or electrically rich? Steam and/or hot water for heat Summertime heat load Rate structure
The Cogen Solution at Amherst Solar Saturn dual-fuel gas turbine and HRSG with duct burner Back-pressure steam turbine Total capacity 1250 and 500 kW
Cogen by numbers: Payback and other cost factors Initial cost Operational savings Simple payback estimates Volatility in energy costs and what that means for payback Rising energy prices = good news!
Amherst Cogen First Costs Construction5,200,000 Equipment3,500,000 Soft Costs 600,000 Total Cost9,300,000
Payback Calculations This will be done live off a spreadsheet based on current gas, oil and electricity costs, and the audiences predictions of future gas, oil and electricity costs.
Grid Operator Alphabet Soup ISO RMR FCM1 FCM2 ODR Translation = $67,000 a year
Cogen Team In-house: D&C, Engineering, Ops, Energy, Administration, Trustees Consultants: Engineers, Commissioning Agent, Testing, Permitting, Procurement Vendor: Prime Mover(s) & Subs Contractor: Builders, Commissioners Become DEEP Green with Just One Project: Cogen
The Bottom Line(s) Reasonable pay-back Fuel flexibility and standby power Huge CO2 reduction