Program Goals
Provide hydrogen to electricity converter – stationary and transportation

• High efficiency (50%)
• Fuel flexible
• Low emissions
• Established technology

Approach

1. Utilize Otto cycle to maximum advantage

2. Utilize homogeneous charge compression ignition for constant volume combustion and high compression ratio

Free Piston / Linear Alternator Configuration

• Provides electronic control of compression ratio
• Free piston trajectory – less TDC dwell
• Advantageous for high compression ratio
• Inherent fuel flexibility

Results

• Ideal Otto cycle approached
• 56% indicated efficiency measured
• Two stroke cycle scavenging system designed
• Linear alternator undergoing testing
• Industrial interest growing

Contact:
Peter VanBlarigan
pvanbla@sandia.gov
(925) 294-3547