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Process and System Analysis at IEF-3

Michael Weber, Thomas Grube, Dennis Krieg

September 16, 2010

Institut für Energieforschung – Brennstoffzellen (IEF-3) 2

Process and System Analysis at IEF-3 M. Weber, T. Grube, D. Krieg

Current research topics

• Traction systems with fuel cells and other power sources• Hydrogen pipeline infrastructure and its components• Electrolysis

Focus

Tools and methods

• Energetic analysis of fuel chains (Well-to-Wheel) • Material balances (LCI)• Material benchmarks and economic evaluation• Dynamic simulation of systems (MatLab-Simulink)

System evaluation based on detailed technical analysis of • technologies for specific applications at• realistic operation scenarios/conditions

Institut für Energieforschung – Brennstoffzellen (IEF-3) 3

Technical concept of a hydrogen pipeline infrastructure

Target of ongoing PhD-thesis

• Portfolio of possible materials (base material, coatings)

• Comparison of steady-state and dynamic operation (in respect of hydrogen

embrittlement and capacity factors)

• Concepts of providing fueling stations with hydrogen

• Feasibility of the technical concepts

• Cost analysis related to the infrastructure concepts

• Comparison to existing infrastructures (e.g. natural gas)

• Compilation of research and development requirements

Institut für Energieforschung – Brennstoffzellen (IEF-3) 4

Comparison of Full-electric Vehicles(after Grube et al. [2010])

Assumptions

Fuel cell (FC) system cost: 50 EUR/kWe at 90 kWe and 15 EUR/kWhH2

700 bar compressed H2 storage with 1.4 kWhH2/kg, after Seyfried [2009]

Energy use of FC car: mechanical energy at the wheel as f(m), 40% efficiency based on MVEG drive cycle after FZJ [2006]

Greenhouse gas emissions for H2 from natural gas in large production in Germany (after FZJ [2006])

Greenhouse gas emissions for electricity according to German electricity mix

Batterie with 150 Whe/kg and 250 EUR/kWhe

FC … Fuel cell (PEFC) WTW … Well-to-wheel

Considering compact-class passenger cars full-electric vehicles with fuel cells show greater advantages over battery-electric cars.