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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

[email protected]

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