![](https://www.empa.ch/documents/146981/355614/HydrogenHome_icon_1.jpg/00d70e7a-1b58-4667-bfc9-7fd79b91cb09?t=1448883608000&doAsUserId=mLYofz1ofIc4z2qdMCjTcg%3D%3D%3F_NewsPortlet_categoryId%3D56982)
HYDROGEN
![](https://www.empa.ch/documents/146981/355614/Electrolysis_icon.jpg/d1e15850-0379-47e6-b834-0dcf6fb8507b?t=1448882491000&doAsUserId=mLYofz1ofIc4z2qdMCjTcg%3D%3D%3F_NewsPortlet_categoryId%3D56982)
ELECTROLYSIS
![](https://www.empa.ch/documents/146981/355614/FuelCell_icon.jpg/eea748fe-4ba7-4e5f-8962-d2424f6de967?t=1448882492000&doAsUserId=mLYofz1ofIc4z2qdMCjTcg%3D%3D%3F_NewsPortlet_categoryId%3D56982)
FUEL CELL
![](https://www.empa.ch/documents/146981/355614/GasStorage_icon.jpg/7612eb86-20cc-4198-aa10-85518c011438?t=1448882492000&doAsUserId=mLYofz1ofIc4z2qdMCjTcg%3D%3D%3F_NewsPortlet_categoryId%3D56982)
STORAGE
![](https://www.empa.ch/documents/146981/355614/Cooking_icon.jpg/8b008642-c54e-490e-abe6-ee24ced80c27?t=1448882491000&doAsUserId=mLYofz1ofIc4z2qdMCjTcg%3D%3D%3F_NewsPortlet_categoryId%3D56982)
H2 COOKER
HYDROGEN GENERATOR (ELECTROLYSIS)
Excess energy is converted to hydrogen for seasonal storage. Benefits in hydrogen storage for seasonal purposes are found in the separation of converter and storage; hydrogen generator / fuel cell and hydrogen storage tank respectively as well as the increased energy density.
![https://www.empa.ch/documents/146981/246517/electrolyzer_abstract2.jpg/a31d4471-0433-4298-b8bc-43d57371d675?t=1448861447000&doAsUserId=mLYofz1ofIc4z2qdMCjTcg%3D%3D%3F_NewsPortlet_categoryId%3D56982](https://www.empa.ch/documents/146981/246517/electrolyzer_abstract2.jpg/a31d4471-0433-4298-b8bc-43d57371d675?t=1448861447000&doAsUserId=mLYofz1ofIc4z2qdMCjTcg%3D%3D%3F_NewsPortlet_categoryId%3D56982)
The hydrogen generator runs on an average of 400 W. It produces 45.5 Nl of hydrogen per hour resulting in an energy consumption of 8.77 Wh / Nl of hydrogen. The hydrogen generator thus has an efficiency of 34 % in respect to the lower heating value of hydrogen. When converting back to electricity with the installed fuel cell, the resulting efficiency of the seasonal storage is approximately 15 % from electric input to electric output. Even though this may seem low, in his application, the measure of importance is only the fuel cell efficiency which lies at approximately 45 %. Storage capacity is more limiting then the ability to charge the hydrogen storage.
Avg. power consumpsion |
400 W |
Pressure output |
Min. 1.4 bar, max. 10.7 bar |
Voltage |
120 or 240 V / 50-60 Hz |
Operating temperature |
15 °C to 40 °C |
Storage temperature |
2 °C to 60 °C |
Noise |
46 dB(A) |