Demonstration projects

Maple leaf duck farm

Initially this project was to use two Honeywell Parallon 75 micro turbines. We contracted with Maple Leaf Duck Farm (MLF) to share the costs and agreed to share the operating data. Unfortunately, Honeywell exited the micro turbine business in late 2001. Consequently, MLF decided to switch to a more conventional technology. A 200 kW Hess internal combustion engine generator was chosen instead. The unit was adapted to run on methane provided from an existing duck manure digester. The system produces both electrical power and heat. The heat is used on-site to enhance the digestion of the duck manure.

The unit began operation in June 2002. MLF owns and operates the generator system. We worked with MLF to develop the most practical interconnection, metering, and billing configuration for this unique project, and also contracted to purchase the renewable energy from MLF. The energy is put toward meeting our state-mandated RPS requirements.

The project did not include any pretreatment of digester gas, and has resulted in corrosion and engine failure. The owner is currently considering his options.

Facility Name

Maple Leaf Duck Farm

Location

2319 Raymond Ave., Franksville, Wis.

Owner/Operator

Maple Leaf Farms

Size (kW or mW)

200 kW nameplate, ~150 kW estimated on digester gas

Description

Anaerobic digester gas firing reciprocating engine

Technology

Mesophilic complete mix anaerobic digester gas firing reciprocating engine

Equipment

Hess 200 kW generator with a Daiwoo engine

Capacity Factor

Available from billing department

Generation to Date

188,902 kWh in 2002

In-Service Date

Generator in-service June 2002

Billing/Metering Configuration

Generation capacity is less than site use (non-exporting generator). Generator is metered. Customer billed for total site usage and We Energies purchases the renewable generation under a renewable energy contract.

Other Key Facts or Features

The meter on the generator is “behind” our primary meter.