Leading The Ethanol Industry To A

Greener Future

GOLDEN RENEWABLE

ENERGY, LLC:

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

SCHEMATIC FLOOR PLAN

Site Plan

QUESTIONS/COMMENTS