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diesel natural gas hydrogen
heat
val
ue [M
J/kg
]
high reactive energy carrier require safe storage
High Density Hydrogen Storage in Metal Hydride Composites with Air Cooling
Mila Dieterich, Inga Bürger, Marc Linder German Aerospace Center (DLR), Stuttgart [email protected] In collaboration with Lars Röntsch, Carsten Pohlmann Fraunhofer IFAM, Dresden
DLR – German Aerospace Center
• Aeronautics • Space Research and Technology • Transport • Energy
• Space Administration • Project Management Agency
Locations and employees
7400 employees across 32 institutes and facilities at 16 sites.
Offices in Brussels, Paris, Tokyo and Washington.
Cologne
Oberpfaffenhofen
Braunschweig
Goettingen
Berlin
Bonn
Neustrelitz
Weilheim
Bremen Trauen
Lampoldshausen
Stuttgart
Stade
Augsburg
Hamburg
Juelich
Thermal Power Plant Components Dr. Stefan Zunft
Thermal Energy Storage
Dr. Stefan Zunft (acting)
Thermochemical Systems
Dr. Marc Linder
Alternative Fuels
Dr. Uwe Dietrich
Stuttgart Stuttgart, Cologne
Thermochemical Storage
Heat Transformation
H2-Storage
Stuttgart
Liquid Hydrocarbon Fuels
H2-Generation and Gas Cleaning
Stuttgart, Cologne
Concrete Storage
„Cell Flux“-Concept
Salt Storage
Latent Heat Storage
Regenerator Storages
High Temperature Heat Exchangers
Institute of Engineering Thermodynamics Prof. A. Thess Thermal Process Technology Dr. Antje Wörner
Thermochemical Systems Reaction Principle
AB(s) + ΔH ⇌ A(s) + B(g)
endothermal
exothermal
Gas
Pre
ssur
e ( l
n p
) Temperature_Solid ( 1/T )
B(g)
A(s) AB(s)
B(g)
Heat released during absorption (charging) Heat required during desorption (discharging)
λ < 1 W/(mK)
Metal Hydride-Graphite Composites
> Lecture > Author • Document > Date DLR.de • Chart 9
H2
D
p_R
thermostat
heat transfer fluid
T
T_R1T
T_R2T
T_R3T
T_R4
T
T_Gas
D
p_DSD
control valve MFM
D
p_H2
reactors
gas supply
sieverts area
T
T_Sieverts
composites show stability of structure and hydrogen performance for 1000 cycles (paper in review process)
thermal conductivity in two-digit range
test rig for cycling stability investigation
High Density Hydrogen Storage
> Lecture > Author • Document > Date DLR.de • Chart 10
fluctuating renewable energy sources
storage in form of hydrogen:
surplus electricity
electrolysis storage fuel cell meet of energy demand H2 H2
• high volumetric storage density • safe: low pressure moderate temperature • low-maintainance • simple construction
[Acta S.p.A., “Electrolysör Datenblatt EL250-500-1000”]
High Density Hydrogen Storage
> Lecture > Author • Document > Date DLR.de • Chart 11
High Density Hydrogen Storage
> Lecture > Author • Document > Date DLR.de • Chart 12
• composite diameter: 21mm
• vantilator cooling (1.7 Wel)
• charging with electrolysis at 30bar
• discharging with mass flow to
feed FC with Pel = 0.6 kW for 100min
→ upscalable
First Measurement Results – Absorption
> Lecture > Author • Document > Date DLR.de • Chart 13
fully charged in 2h below 30 bar
First Measurement Results – Desorption
> Lecture > Author • Document > Date DLR.de • Chart 14
provides hydrogen for FC for more than 100min
Storage meets requirements
• H2-storage in metal hydrides
• long-term cycle stable composites with high thermal conductivity
• Development of simple and safe storage for domestic application
• High diamerter (21mm) with only ventilator cooling
• Charchable below 30bar (electrolysis)
• Discharable to run FC with 0.6 kW for 100min
(power and time are upscalable)
Summary
> Lecture > Author • Document > Date DLR.de • Chart 15
Thank you!
> Vortrag > Autor • Dokumentname > Datum DLR.de • Folie 16
Mila Dieterich German Aerospace Center [email protected]
