new theroadtonetzeroat wastewater$treatment$plants · 2017. 10. 17. · 1 theroadtonetzeroat...
TRANSCRIPT
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The Road to Net Zero at Wastewater Treatment Plants
NEWEA 2016 Annual Conference Presenter: Paul Hughes
Organic Rankine Cycle (ORC) technology captures low grade waste heat to generate emission-‐free
electricity without addi<onal fuel.
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Organic Rankine Cycle = Waste Heat to Power
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• Recover heat from hot water .low to boil working .luid • Use pressure of expanded working .luid to spin a drive shaft connected to a generator
WASTE HEAT/HOT WATER 170–252 F / 77–122 C
Not a turbine
Low Temp ORC Global Installations
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Austria Canada Croa<a*
Czech Republic France Germany Italy
Japan* Romania Slovakia
United Kingdom* United States
In Italy on Agras Boiler Fueled with wood chips
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Woody Biomass
Air Burners “PGFireBox” Fueled with untreated, unchipped woody
biomass in Florida
On a Uniconfort Boiler heated by hopper fed lumber yard waste
in central Oregon
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Gross Power Output: up to 75kWe Thermal Heat Input: 660kWt Hot Water Input Range: 112°C Hot Water Flow: 150 GPM Air Cooled Condenser
Geothermal, Nevada
Turbina a gas 82 Mwe Acqua raffr. di 120°C
District Heating System
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Clean, Distributed Power
Find the heat 8
• Biomass Boiler • Reciproca<ng Engines • Biogas Boilers • Geothermal/Oil & Gas Wells • Solar Thermal • Process Heat
33% Effec<ve Power
Organic
Rankine Cycle (ORC) process generates
clean electric power
Waste Heat from Sta;onary Engines
Typical Energy Split in a Sta<onary Engine
100% Applied Fuel Energy
5% Fric<on Losses
27% Radiator
35% Exhaust Gas
Low Temp
High Temp
Waste Heat
Waste Heat
Power Output
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Energy
Waste Heat
Engine Installation in Oil & Gas
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LandYill Biogas, France
• On 4 Jenbachers • Effective thermal solution • Superior power output • Customized physical plant • Lower equipment cost
and maintenance • Packaged solution • Power+ ORC meets
variable engine load.
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AD Biogas, Czech
AD Biogas, Germany
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… on Diesel Engines, USA
Dutch Harbor
Benefits: § Complete Engine Radiator
Replacement § 10% -‐ 12%+ Improved Fuel
Efficiency § Easily Transportable § Limited Site ConstrucMon § Payback 2-‐3 years (diesel)
POWER+ ORC Combined Engine and ORC Radiator
Exhaust Gas Heat Exchanger
1.1 MW Cummins Genset
The Radiator with a Payback
Containerized 1.1MW Cummins Genset + ORC Packaged in two 40-‐foot containers ElectraTherm has 27 installs on engines
including recently shipped US DoD system shown here, first ever radiator replacement plus heat-‐to-‐power
“The Radiator with a Payback” Video at hIps://youtu.be/fca0faX8R84
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Bakken Oil Field
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HESS Oil Well – Emission Reduction Project Low Temperature ORC Solution
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Why low temperature ORC?
• Emission Reduction – Reduce/Eliminate the Flaring!
• Onsite Power Generation -‐ Renewable • No Gas Conditioning Needed • Modular and Portable + Small Footprint • Simple Grid Interconnect • Reliable (97% uptime) -‐ Remote Locations • Low Capital & O&M Costs • Alternative to Engine, Micro Turbine, and Fuel
Cell • Staff was already familiar/comfortable with
Boilers
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WASTEWATER TREATMENT PLANTS -‐ Anaerobic Digestion
Waste Water Treatment
Biogas Cleanup
Anaerobic Digester
Engine GenSet
Biogas Flaring RESULTS: Power produc<on and less flaring but…
High capital cost Flare flame typically remains Intensive annual maintenance Emissions Complex installa<on and large footprint
Current Paradigm for Biogas-‐Fired Combined Heat & Power
O O O
Biogas Storage
O O
Boiler
Exis<ng Equipment
New Equipment
Cost: $Millions
Waste Water Treatment The New Paradigm with an ORC
No Biogas Flaring RESULTS: Power produc<on with… Much lower capital cost Greatly reduced maintenance Flare greatly reduced or eliminated Reduced emissions No PPA hassle; offset onsite use Simple installa<on and small footprint No gas treatment or storage
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Anaerobic Digester Boiler
Exis<ng Equipment
New Equipment
Cost: < $500,000
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POWER+ WASTEWATER TREATMENT PLANT
Biogas U<liza<on
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