Heliocentris Commercial Confidential 1 Integration of Industrial Fuel Cells in Technical Applications Using the NEXA ® Training System Dr. Claus Fischer & Ralph Schanz HELIOCENTRIS Energiesysteme GmbH Berlin / Germany

Heliocentris Commercial Confidential 2 Founded in 1995 Pioneer in fuel cell education Based in Berlin (Germany) / office in Vancouver Leading supplier of fuel cell training systems to Universities, Research Institutes and Science Centres with over units sold to 50 countries Heliocentris

Heliocentris Commercial Confidential 3 School education Science kits Lesson material Outreach programs Heliocentris - An educational company Post secondary education Lab products Training systems Fuel cell and hydrogen components System integration service

Heliocentris Commercial Confidential 4 Rapidly emerging industry using fuel cells as replacement of conventional batteries (vehicles, off-grid power supply) High demand of R&D, particularly in fuel cell integration Lack of experience on industrial fuel cell systems (kW) Training necessary to improve implementation skills for fuel cells in own applications Today´s Challege on Fuel Cell Integration

Heliocentris Commercial Confidential 5 Based on an industrial 1.2 kW Fuel Cell Module (NEXA ® ) The NEXA ® Training System

Heliocentris Commercial Confidential 6 Fuel Cell Module Nexa ® Power Module 1.2 kW Unregulated DC output V / Nominal 24 V Rated Current: 46 A Pressure bar ( PSIG) Quick coupler & integrated flow meter

Heliocentris Commercial Confidential 7 Start-up kit included – ready to use In-built system control Complete safety monitoring Easy system integration Long life time at extended run times Reliable operation (No. 1 fuel cell in universities) Fuel Cell Module Advantages of the NEXA ® Power Module

Heliocentris Commercial Confidential 8 NEXA Accessories

Heliocentris Commercial Confidential 9 Energy Management Module DC/DC converter (24 V) Battery charger with Start- and Back-up Batteries Batteries 24 V (2 different capacities plus external battery option) DC/AC Inverter (230 V)

Heliocentris Commercial Confidential 10 DC Electronic Load Max Power 1500 W Fully computer programmable adjust load profiles Computer, Monitor & Training Software

Heliocentris Commercial Confidential 11 The stable conditions for operation Which fuel cell size is requested How to optimize the battery capacity vs. hydrogen capacity How climatic conditions effect fuel cell operation How the system responds on a selected load profile The NEXA ® Training System Learn step by step:

Heliocentris Commercial Confidential 12 Flow Chart Power Chart Time Chart

Heliocentris Commercial Confidential 13 Flow Chart Power Chart Time Chart

Heliocentris Commercial Confidential 14 Real time Monitoring FC-Voltage FC-Current H 2 /O 2 -Concentration Hydrogen consumption Temperature Pressure H 2 Battery-Voltage Mass flow O 2 FC-Temperature Voltage Purge Cells Run Time FC-System Run Time Fuel Cell Flow Chart Power Chart Time Chart

Heliocentris Commercial Confidential 15 Versatile in Use: Four Examples Electrical Engineering Physical / Mechanical Engineering Energy Engineering Application Engineering Product and Prototype Development The NEXA ® Training System

Heliocentris Commercial Confidential 16 1) Evaluation of Suitable Power Electronics Need for power electronics Set up a hybrid system Analyse the design Adapt to special applications

Heliocentris Commercial Confidential 17 2) Evaluation & Design of a Battery Power Management Need for batteries Charging and discharging Selection of battery types Optimize the parameters The NEXA ® Training System

Heliocentris Commercial Confidential 18 3) Design of an Off-grid Power Supply Set-up and operation of a fuel cell hybride (2 kW peak /1 kW cont ) Ohmic and inductive loads Power quality analyses Final prototype design The NEXA ® Training System

Heliocentris Commercial Confidential 19 4) Development of Fuel Cell Powered Vehicles Design and construction of a car Proper Selection and adjustment of a suitable motor, buffer battery etc. Optimizing the power management Improve interaction of all system components The NEXA ® Training System

Heliocentris Commercial Confidential 20 Conclusion and Outlook Further information and contact: The Nexa ® Training System is a valuable tool for complex fuel cell engineering tasks and for fuel cell integration. The system response on various load profiles of a fuel cell hybrid system can be investigated. Electrical components of an own application can be defined and optimized (ideal for prototype design).

Heliocentris Commercial Confidential 21 Instructor

Heliocentris Commercial Confidential 22 Instructor – the Fuel Cell Stack System for Training 50 watts fuel cell stack Safe hydrogen supply solutions (Gas cylinders, hydride storage tanks or electrolyser solutions) Complete educational material included (Experimentation handbook, experimentation and display software, interactive CD-ROM with learning modules)

Heliocentris Commercial Confidential 23 Fuel Cell System - H 2 connection and flow meter - 50 W air cooled fuel cell stack - Temp. sensor - Single cell control - Purge magnet valve DC/DC- converter -DC/DC converter -Start battery Hydrogen supply - Hydrogen connection - Pressure reducer - Pressure gauge - Safety magnet valve Instructor

Heliocentris Commercial Confidential 24 Parameter Control and Set Mode Instructor

Heliocentris Commercial Confidential 25 Voltage Current Fan Power H2-Consumption Temperature Instructor Parameter Monitoring Mode

Heliocentris Commercial Confidential 26 Effect of Temperature 25°C 45°C Experiment 1: Factors effecting the characteristic curve Instructor

Heliocentris Commercial Confidential 27 Input Power: 77 W Stack Power: 40 W Usable Power: 26 W  Stack = 0,52  System = 0,34 Instructor Experiment 2: “Usable Power”

Heliocentris Commercial Confidential 28 INVITATION: Please visit us at HANNOVER FAIR April in Germany (Hall 13, Stand E40/1). Large Fuel Cell Exhibition Tessekürler