golden renewable energy, llc · leading the ethanol industry to a greener future golden renewable...
Post on 08-Jun-2018
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Why Ethanol Plants are Good
Candidates for CHP
Continuous power and steam demand
Electric/steam loads match size of CHP technologies
Electric power reliability and quality are valuable
Long operating hours (typically 24/7)
Low differential between peak and base loads
Energy is the second highest cost of production
Electric and steam demands are large and coincident
Benefits To The Overall Ethanol
Industry Implementing This
Concept On A Broad Scale
1. Environmental: a. Lower overall energy usage
b. Lower overall carbon emissions
2. Political:
a. Ethanol would have a greater net-energy-produced
value.
b. Ethanol would be viewed as greener.
3. Economic: a. If the spark spread is sufficient, this type of retrofit would
provide financial benefits to individual ethanol
companies.
Generate Benefits to Facility
Owners For Deploying CHP
Systems
Reduce energy costs
Reduce life-cycle costs
Attractive return on investments
Improved power reliability
Potentially less negative impact due to any future carbon tax
Specific Benefits to Facility
Owners For Deploying CHP
Systems
Increased revenue in LCFS markets
Increased revenue due to debottlenecking
Types Of Cogeneration Plants
Boiler / Steam Turbine
Gas Turbine
Reciprocating Engine CHP
Biomass CHP with Gasification
Thermal Oxidizer CHP
Ethanol Plant / Utility Partnership
Background Information On
Efficiencies
1. There are currently 192 dry mill ethanol plants, 20 mm
g/y or larger, in the U.S.
2. A small minority of these use some form of co-
generation, typically steam turbines or gas turbines.
Their efficiencies are:
A. Net electrical efficiency, maximum = 40%
B. Overall efficiency, maximum = 80%
3. The cogeneration facility being planned by Golden
Renewable Energy will have the following efficiency:
A. Net electrical efficiency, minimum = 45%
B. Overall efficiency, minimum = 90%
Concept And Goal For Golden
Renewable Energy
Concept: Improve the energy efficiency of corn-based dry
mill ethanol production.
Goal: Install a First-Of-Its-Kind-In-The-Nation co-
generation facility at an existing ethanol plant.
The completely unique aspects of our planned
facility are:
An ultra-high efficiency (48.7%) reciprocating
engine generator.
Integration of engine jacket heat into the plant for
two production functions.
Project Overview
8 MW POWER PLANT
• Natural Gas Fueled Generator
• Continuous Duty Operation
• Exhaust Heat Captured at HRSG
• Engine Jacket Heat Also Captured
Power Output Exported to Alliant Energy
Heat Output Exported to GGE
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