Implementing Small Scale Bioenergy Systems · Combustion Engine (Up to 0.5 MW) Gas Turbine (>5 MW)...

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Kamalesh Doshi, Program Director Biomass Energy Resource Center Oswego BOCES, Mexico, NY November 13, 2008 Implementing Small Scale Bioenergy Systems

Transcript of Implementing Small Scale Bioenergy Systems · Combustion Engine (Up to 0.5 MW) Gas Turbine (>5 MW)...

Page 1: Implementing Small Scale Bioenergy Systems · Combustion Engine (Up to 0.5 MW) Gas Turbine (>5 MW) Synthesis Gas Hot Gas Steam Turbine (>1 MW) Combustion Steam Gas Turbine (>0.5 MW)

Kamalesh Doshi, Program DirectorBiomass Energy Resource Center

Oswego BOCES, Mexico, NYNovember 13, 2008

Implementing Small Scale Bioenergy Systems

Page 2: Implementing Small Scale Bioenergy Systems · Combustion Engine (Up to 0.5 MW) Gas Turbine (>5 MW) Synthesis Gas Hot Gas Steam Turbine (>1 MW) Combustion Steam Gas Turbine (>0.5 MW)

Biomass Energy Resource Center (BERC)

BERC is a national not-for-profit organization working to

promote responsible use of biomass for energy.

BERC’s mission is to achieve a healthier environment,

strengthen local economies, and increase energy security

across the United States by developing sustainable biomass

systems at the community level.

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Biomass: only renewable resource that causes problems when NOT used!

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WOOD FUEL COMPARISON:

Best Applications for Woodchips

• Larger facilities

• Where fuel cost savings are very important

• Larger facilities (more than 50,000 sq. ft.)

• Where there is room for: new boiler room, fuel

storage bin, tractor-trailer access

• In/near forested areas with an active forest

products industry

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About how much wood will the new community uses consume?

• One school 200-1,000 tons

• 30 Vermont schools 15,000 tons

• Middlebury College 30,000 tons

• Vermont state complex 5,000 tons

• Crotched Mountain campus 3,000 tons

• Public housing (50 units) 450 tons

All in green tons chips

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Technologies –Wood Residues to Energy

• Industrial process heat

• Building space heat (and DHW)

• District heat

• Combined heat and power (CHP)

• Utility-scale power plants

• Utility co-firing

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Bioenergy Technology Pathways

Gasification

Internal Combustion

Engine(Up to 0.5 MW)

Gas Turbine(>5 MW)

Synthesis Gas

Hot Gas

Steam Turbine(>1 MW)

Combustion

Steam

Gas Turbine(>0.5 MW)

•Lower efficiencies•Greater air emissions

•Favorable economics•Still in developmental stages

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• Increased efficiency

• Lower emissions

• Lower time requirements

• Reliable operation

• Automated fuel handling

• Hot water boiler and heat distribution

“Modern” Biomass Heating Systems

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On-slab fuel storage Fuel moved with small loader

Day bin and small combustor

Low-Cost Semi-Automated Systems

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GARN Boiler

Low-Cost Hand-Fired Systems

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• 10,000 to 50,000 SF

• Oil, propane, or electric

• Natural gas only if price is above average

• Centralized heat distribution system

Wood Pellet Boiler Systems

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Wood Storage & Delivery -Container System

Boulder County Transportation

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BIOMASSFEEDSTOCKS

Woodchips(hardwood, softwood,

bole, whole-tree chips)

Pellets(Grass, sawdust,

agricultural residues)

Cordwood

Agricultural crops(corn)

FEEDSTOCKSTORAGE

Below-grade bin

Above-grade

(on slab storage)

Silo (inside, under

a roof, or outside)

Roll off containers

FEEDSTOCK HANDLING

Fully

automated

Semi

automated

Manual loading

HEATDISTRIBUTION

Hot water

Steam

Hot air

Technology Options for Biomass Heating Systems

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Size158,000 square feet1,000 students

Heating SystemWoodchips (converted from electric heat)

Fuel Use847 tons in 2006-07

Annual Heating Cost$39,782 in 2006-07

School Case Study

Barre City ElementaryBarre, Vermont

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Wood Heating for Institutional and Public Buildings

State Office Building

Hospital

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New District/Campus Wood Energy

Crotched Mountain Rehab CenterGreenfield, New Hampshire

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Community District Energy

Green Acres Family Housing

Small-

Scale

Setting

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• 10,000 SF heated space

• 9 ton storage silo

• 10-15 tons of pellets per year

• 75 minutes staff time per week (during heating season)

• Estimated 45% annual fuel cost savings

Educational Facility

Harris Center for Conservation EducationHancock, NH

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Ways to Analyze Cost Effectiveness

All about

• Amount of savings generated

• At what project cost

Methods

• Simple payback

• Cash flow analysis

• Life-cycle cost analysis

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A tool that compares the cost of owning and operating the existing heating system to the cost of purchasing, installing, and operating a new wood pellet heating system.

Life Cycle Cost Analysis

•Set assumptions

•Collect data

•Define the project and its costs

•Equipment

•Construction

•Professionals fees & permits

•Annual fuel costs

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Kamalesh DoshiProgram Director

Biomass Energy Resource Center43 State StreetMontpelier, VT 05601802-223-7770 X 126

[email protected]

Contact Information

www.biomasscenter.org