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8/9/2019 Presentation Scott
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8/9/2019 Presentation Scott
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Micro-Turbine Systems
for Energy Production fromAgricultural and Food Waste
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Unison Solutions Overview
Turnkey waste-to-energy systems Biogas compression/treatment system design and
fabrication (Siloxane, moisture and H2S removal) Gas conditioning system components (suction
scrubbers, heat exchangers, filtration, condensateknock-outs, etc.) New line of Air and Gas drying equipment Capstone MicroTurbine ASP and distributor (thru
Alliant Energy) STM Power Stirling Engine Generator Distributor Multiple awards for Biogas systems (EPA project of
the year 2003)
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A Sampling of Unison Solutions BiogasProjects
Landfills1. Antioch IL-12 Turbine CHP2. Sauk Co. WI-16 Turbines3. Glacier Ridge WI-10 Turbines4. Wisc. Rapids WI-2000 scfm boiler direct use5. Madison WI-1 STM Stirling Engine WWTF/Industrial/Farm Digesters1. Rockford IL-2.25 MW Engine CHP
2. Chippewa Falls WI-2 Turbine CHP3. Albert Lea MN-4 Turbine CHP4. Sheboygan WI-10 Turbine CHP5. Northern Star Co. MN-4 Turbines
6. Top Deck Farms IA-4 Turbines
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2000scfm Gas Treatment System
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Northern Star FoodsMinneapolis, MN
4-30kW Capstone Turbine System
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Key Components of the Installation
Mesophilic Anaerobic Digester Gas conditioning equipment (Moisture
Removal) Gas compression system-scroll compressors Generation System-4 30kW Capstone
turbines No Heat recovery system
Electrical System Interconnection Communications/Automation Utility metering
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Gas Compression/Treatment Skid
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Scroll Compressors
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4-Capstone 30kW Micro-Turbines
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System Block Diagram
FuelSystem
Gas Turbine
Control Board
Power Board
U
ser Interface
Exhaust
ElectricalOutput
Air
Communications and Control
Fuel
DPC
Generator
Turbogenerator
GeneratorCooling Fins
Combustion ChamberExhaust
Outlet
Recuperator
Air Bearings
Compressor
Generator Turbine
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System Block Diagram
Digital PowerController
(DPC)
TurbogeneratorFuel
System
User Interface
Exhaust
ElectricalOutput
Air
Communications and Control
Fuel
Turbogenerator
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Northern Star Project Overview
Approx. 2 years of operation since gasconditioning skid replacement.
Biogas compression/treatment system
is removing the moisture from the gasand protecting the turbines Parasitic load on system for biogas
compression and treatment is 15% Biggest challenge has been the high
levels of H2S
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Top Deck FarmsWestgate, Iowa
4-30kW Capstone Turbine System
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Key Components of the Installation
Traditional plug-flow digester-750 head dairy Gas conditioning equipment (Moisture Removal) Gas compression system-flooded screw
Generation System-4 30kW Capstone turbines Heat recovery system-Cain heat exchanger Methane/LP fueled boiler Electrical System Interconnection
Communications/Automation Utility metering
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Complete Gas Conditioning System
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Suction Scrubber
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Flooded Screw Gas Compressor
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Glycol Chiller for Moisture Removal
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Capstone 30 kW Micro-Turbines
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Exhaust Heat Exchanger
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Methane/LP Boiler
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Controls for all System Functions
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Top Deck Project Overview
Approx. 1 year of operation since ICengine/generator removed
Biogas compression/treatment system is removingthe moisture from the gas and protecting the turbines
Parasitic load on system for biogas compression andtreatment is 16%
Installation cost of $3,000/kW O&M cost is running $0.01/kWh or $9900/year
Biggest challenge has been the dual fuel gas train onthe boiler
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Key Issues with Micro-Turbines on Ag orFood Waste Digestion
Ag/Food Waste digester fueled micro-turbinesystems need gas conditioning for moisture removal.
Micro-turbine systems also need gas compression to80psi.
Large quantity of thermal energy is available forheating the digester, domestic hot water and spaceheating with a proper heat recovery system.
Turbine and gas treatment O&M expense is minimal
if the system is designed and built properly. Micro-turbines are a viable option for Ag/Food Waste
digester fueled combined heat and power systems
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Unison Solutions Contact
InformationJan Scott
563-585-0968