©AGreen Energy, LLC, 2010. All rights reserved. Individual Farm Model – 300 to 500 cows 1. Manure...
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Transcript of ©AGreen Energy, LLC, 2010. All rights reserved. Individual Farm Model – 300 to 500 cows 1. Manure...
©AGreen Energy, LLC, 2010. All rights reserved.
Individual Farm Model – 300 to 500 cows
1. Manure Input:~4,000 gallons per day
1. Organic Input:~6,000 gallons per day
2. Digestion Tank Loading Rate:~10,000 gallons per day, 30 day retention
3. Gas Capture:~100,000 cubic feet per day, 60% methane. 73 MMBTU/day
5. Heat Exchanged
4. Electricity Generated:~4,000 kWh/day
3. Solids Produced:~15 tons per day, 18 cubic yards
3. Liquids Produced:~6,000 gallons per day
©AGreen Energy, LLC, 2010. All rights reserved.
Hof Oegens – 185kW, model facility
Important Characteristics
-Small herd (120 cows from two herds)-Large amount of non-manure substrate
-Use of waste heat for ag purposes-Commercial site
©AGreen Energy, LLC, 2010. All rights reserved.
Hof Oegen - CHP
185kW – containerized, quiet, process controls
Sends hot water to greenhouses as well as electricity to grid Sensor Reports
Containerized CHP
Output Meter
©AGreen Energy, LLC, 2010. All rights reserved.
Hof Oegen – Waste Heat Utilization
1,000m3 currently, heat production can support up to 4,000m3
Looking to upgrade to a more efficient heat exchanger
Digester House/Barns Greenhouses
Waste Heat Use 25% 35% 40% (10% now)
Heat Exchanger
Soil Sterilizer
©AGreen Energy, LLC, 2010. All rights reserved.
Anaerobic Digestion – GHG Reduction and Energy
Combustion of Methane:
CH4 + 2O2 CO2 + 2H2O
Transforms methane (Global Warming Potential of 21-25) to carbon dioxide (GWP of 1)
Replaces fossil fuel use for electricity generation and local heating
300kW GenSet 92.5% UptimeX = 2,430,900kWh per year
2,430,900kWh per year / 7,620 kWh per household =
319
Renewable Massachusetts Households per AD
©AGreen Energy, LLC, 2010. All rights reserved.
Impact of Nutrient Regulations/AD Effluent Spreading
0
50
100
150
200
250
300
350
400
450
1940 1950 1960 1970 1980 1990 2000 2010
1,00
0 to
nn
es o
f N
per
yea
r
Fertilizer Manure
Source:
Tafdrup, Søren. ”Agricultural biogas in the future Danish energy supply” 2008.
©AGreen Energy, LLC, 2010. All rights reserved.
How Much?
Project Funding – One Farm
Grants 1,050,000
Other Equity 800,000
Loan 900,000
Total: $2,750,000
Loan Guarantees 1,800,000
Project Spending – One Farm
Equipment 2,200,000
Fees 550,000
Total: $2,750,000
Going from One to Five Farms:
Project Challenge
First Farm:
All Set, Operational in 2010
©AGreen Energy, LLC, 2010. All rights reserved.
Challenge - Electricity Pricing
DenmarkCost
($/kWh)
Subscription Payment $.029
Electricity Tax $.094
Distribution Payment $.007
Payment to Conservation Fund
$.001
CO2 Tax $.015
VAT $.068
Energy Cost $.126
Total: $.34
Massachusetts/Denmark Compared
Cost ($/kWh)
Massachusetts $.18
Denmark $.34
Difference: +$.16
Source:
Danish Energy Agency, “Energy Statistic 2007”
©AGreen Energy, LLC, 2010. All rights reserved.
Challenges – Juggling Many Parties
Farms Organics Energy Funding
Utilities
Attributes
Workable net metering or feed-in tariff
Sale of excess electricityat close to retail
Short turn around for equity
Not bundled with energy
Cash Market
Scrape facilities
Use, or willing to switch to organic bedding
Truck Access (25 ton loads)
3 phase power service
Existing heat demand andwaste heat user
350-1,000 cows, or abilityto aggregate
Existing waste hauler
Allowances and incentivesfor organic waste diversion
Market size and currentCost of disposal
Fields with slight or no slope
Desire to control odor orenvironmental challenge
Proximity
Grant Programs
Equipment/ Construction
Equity and Loans
Interconnection requirement
Bonds
Equity Sources
Long term utility contract
Co-products
Organic fertilizer market
Soil amendment market
©AGreen Energy, LLC, 2010. All rights reserved.
©AGreen Energy, LLC, 2010. All rights reserved.