Becoming DEEP Green with Just One Project: Cogen Tom Davies – Director Design & Construction,...

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

Greenhouse gas auditAmherst Annual Greenhouse Gas Emissions Trend

(linear regression)

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15,000

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slope = 343 tons per year (1.2% growth)

Greenhouse gas model

Greenhouse Gas Emissions History: 1.2% Growth

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Climate Change Commitments

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Step It Up

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President's

Step It Up

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Flavors of climate commitment

Many ways to go green – How do they compare?

Purchasing REC’s Building improvements Operational changes Behavioral changes Cogeneration

Offsets, Programs, and Projects

GHG Reduction Strategies

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Offsets, vs. Projects and Cogen

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r Offsets

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Cogen by the numbers

of GHG emissions from fuel for heat and purchased electricity

of the energy we buy is electricity

of our GHG emissions are from electricity

Where does electricity come from?

Electrical Energy Generation by SourceUS Total

3%6% 2%

Nuclear

Natural Gas

Petroleum

Renewables

of the energy used to generate electricity is wasted as heat

efficiency of the nation’s electric grid

overall efficiency of a small cogen system

Comparison of conventional systems vs. Cogen

CO2 reduction 7000 tons, 23%

NOx (smog) reduction 27 tons, 60%

SOx (acid rain) reduction 93 tons, 62%

OK, you convinced me.So what is this Cogen?

Gas turbine, recip engine, steam turbine Types of plants where this it works What’s new: available to smaller campuses

Cogen explained:

DISTRIBUTION SYSTEM (Eff. = 95%)

STEAM TURBINE (Eff. = 42%)

BOILER (Efficiency = 83%)

CONDENSER

72Units 22

Units25

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:

58 Units of Thermal Energy

73Units

Heat to Campus58 Units

Thermal Efficiency: 80%

Conventional Heating Plant:

73Units

Heat to Campus58 Units

Overall Efficiency: 55%

22 Units of Electricity

58 Units of Thermal Energy

DISTRIBUTION SYSTEM (Eff. = 95%)

STEAM TURBINE (Eff. = 42%)

CONDENSER

72Units 22

Units25

High Pressure Steam

60 Units

Conventional Heat & Power:

22 units electricity

58 units thermal energy

Cogen = Combined Heat & Power:

58 Units

Overall Efficiency: 80%

100Units

22Units

GAS TURBINE (Efficiency = 24%)

HEAT RECOVERY STEAM GENERATOR

Steam to Campus

76 Units

Cogen explained:

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

Construction 5,200,000 Equipment 3,500,000 Soft Costs 600,000 Total Cost 9,300,000

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.

NG #2 #6 kWh Annual

$/mcf gal gal Svgs

1 $8.10 $3.29 $3.50 $0.14 $912,941

2 $8.00 $3.50 $3.50 $0.15 $936,592

3 $9.00 $3.50 $3.50 $0.15 $901,706

4 $10.00 $3.50 $3.50 $0.15 $866,821

5 $8.00 $3.50 $3.50 $0.16 $1,058,543

6 $9.00 $3.50 $3.50 $0.16 $1,023,657

7 $10.00 $3.50 $3.50 $0.16 $988,772

8 $8.00 $3.50 $3.50 $0.17 $1,180,494

9 $9.00 $3.50 $3.50 $0.17 $1,145,609

10 $10.00 $3.50 $3.50 $0.17 $1,110,723

11 $11.00 $3.50 $3.50 $0.17 $1,075,837

Other benefits:

Stand-by power capabilities

Island mode operation

Demand reduction = payments from utility

Diversification of boiler equipment

Reduced reliance on #6 fuel oil

Too good to be true?

Equipment availability

The reality of a seller’s market

Schedule volatility

Pricing volatility and change orders

It’s complex, so build a great team

Evolution of costs & savings

Feasibility Project IncreaseProject Cost $5,100,000 $9,300,000 82%Utility Costs:

Electricity 41.03$ 46.89$ 14%Natural Gas 10.10$ 13.00$ 29%#2 Fuel Oil 9.66$ 25.36$ 163%#6 Fuel Oil 8.00$ 16.00$ 100%

Annual Savings $809,000 $1,018,000 26%Simple Payback 6.3 9.1Est. ROI 16% 11%

Grid Operator Alphabet Soup ISO

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

Resources

CHP Application Centers www.northeastchp.org www.chpcenterma.org www.chpcenterse.org www.gulfcoastchp.org www.chpcentermw.org www.intermountainchp.org www.chpcenternw.org www.chpcenterpr.org

Discussion

Contact info:

Tom – tdavies@amherst.edu Todd – tholland@fivecolleges.edu

Becoming DEEP Green with Just One Project: Cogen Tom Davies – Director Design & Construction,...

Documents

GC ESC - COGEN Europe’s Contribution€¦ · GC ESC - COGEN Europe’s Contribution 18 March, 2016 Alexandra Tudoroiu-Lakavice (COGEN Europe) cogeneurope.eu Outline 2 • About

Cogen Write Up

Cain Cogen Presentation - Germantown, WI | Home

Cogen for Africa Project

COGEN Europe presentation on micro-CHP

43MW Wartsila Cogen Plant - uspowerco.com

Rice Husk Cogen PDD Anant Joshi

AIChE 2011 Cogen Screening 05

Cogen Paper-SA.PPTX

2016 03 02 cogen europe ppt_hungary

Environmental Health & Safety | UMass Amherst Amherst COVID-19... · Environmental Health & Safety | UMass Amherst

COGEN Europe · cogeneurope.eu COGEN Europe Refurbishment of existing CHPs improving industrial productivity The Spanish Case and EU Scaling Up

Cain Cogen

Epa of cogen

The Oshawa Cogen Project - Northland Poweroshawa.northlandpower.ca/site/northland_power___oshawa/assets/pdf/bd... · 17 Oshawa Cogen Project •The Oshawa Cogen can be used as an

Perfil Institucional COGEN

Relatório de Atividades e Contas 2019 - COGEN · A empresa que desistiu de ser associada coletiva da COGEN Portugal foi a Winpower, SA. A 31 de Dezembro de 2019, a COGEN Portugal

Amherst Maps | Amherst, MA - Official Website

Tooheys Cogen Facility - Environmental Assessment

MCTAP Peluang Cogen II 221013