Siemens plans electrolyzer system to store wind power as hydrogen

Sponsored by

In the German city of Mainz, Siemens, together with the public utilities of Mainz, Linde and the RheinMain University of Applied Sciences, has laid the foundation stone for a new type of energy storage system.

From spring 2015, the system, equipped with an electrolyzer from Siemens, will convert surplus electricity from wind farms to hydrogen. The hydrogen will then be stored locally in tankers or fed directly into the natural gas grid for subsequent power or heat generation.

In this way, it will be possible to store electricity from renewable sources over longer periods of time. The tankers will also be able to supply the growing network of hydrogen filling stations for emission-free fuel-cell vehicles.

The system will have a peak rating of up to 6 MW. The project, which will cost 17 million, is being financed with the support of the German Federal Ministry of Economics and Technology as part of the Energy Storage Funding Initiative.

The principle of electrolysis has been tried and tested for decades. What is special about the Mainz system is that it involves highly dynamic PEM high-pressure electrolysis that is particularly suitable for high current density and can react within milliseconds to sharp increases in power generation from wind and solar sources.

In this electrolyzer a proton exchange membrane (PEM) separates the two electrodes at which oxygen and hydrogen are formed. On the front and back of the membrane are precious-metal electrodes that are connected to the positive and negative poles of the voltage source. This is where the water is split. The system in Mainz will thus have a capacity relevant for bottlenecks in the grid and small wind farms.

Sponsored by


California ISO preparing for expansion after governor signs law


The state law increases the RPS to 50 percent by the end of 2030    

NEC Energy partners with Eos Energy Storage on energy storage


The GSS can be rapidly deployed and put into commercial operation within six weeks of equipment delivery on-site

Louisiana PSC lays out review schedule for Entergy's 980 MW St. Charles project

10/12/2015 The commission on Sept. 14 approved the business combination of Entergy Louisiana and Entergy Gulf States Louisiana 

Plan to shift power to natural gas clears Puerto Rico hurdle


The $484 million project is critical to plans to convert oil-fired power generation to cheaper, cleaner natural gas

Clean Energy Collective introduces rate-based community solar power

10/12/2015 CEC’s new IOU-owned solar model bucks conventional wisdom that utilities cannot justify ratepayer solar participation with...

ENGIE, Mitsubishi Heavy Industries to collaborate on energy value chain

10/12/2015 This agreement was signed within the context of changes in the energy sector landscape to be able to offer a range of solu...

ION Engineering completes pilot test of carbon capture technology


Pilot testing was completed in August 2015 

View more Job Listings >>



Solar + Storage: Capturing Opportunities and Overcoming Challenges in Asia Pacific

The convergence of solar and energy storage applications is under way. The combined application o...

Mobility Solutions for the Utility Industry: Enabling your workforce anytime, anywhere

Together, Schneider Electric, Intel, and Microsoft provide high-performance mobility solutions fo...

How certified T&D components help to improve power network performance

Electricity is the life blood of modern society. Any interruption to its supply can have a huge i...

Moisture in Transformer Oil Behavior – a Deeper Look into a Complex Phenomenon

As our understanding of how moisture movement in transformers improves, so does the evolution of ...

Connecting the Physical and Digital Domains: Intelligent Integration for a Smart City

Free Webcast Series from Leidos | Part 2 of 2 - Connecting the Physical and Digital Domains: Inte...



Aurora™ is a proprietary blend of alumino-silicate based minerals engineered to treat a boiler's fireside system against slagging, fouling and corr...

Swage Bus Accessories

By using a compression technology process called "swaging," aluminum bus accessories can be installed without a welder. Products include bus couple...

Decontamination & Decommissioning

Decommissioning strategy development, cost estimates, plant modifications; system and building decontamination; RV segmentation; large component re...

Nuclear Horizontal Modular Storage (NUHOMS®)

AREVA TN’s NRC-licensed NUHOMS® system ensures the highest safety and lowest dose performance. With no tipping, tripping and sliding, you have the...


Meyer - Engineered Poles

As your comprehensive resource for any configuration of tubular steel structure, Meyer works closely with you to develop e...

LD Poles

The standard designs and high-strength material used in the fabrication of our Light Duty steel poles insures confidence t...

Standard H-Frames

Meyer Steel Structures has compiled a database of existing steel H-frame designs that could be used to quickly meet your n...

Systems & Utility Technology Selection

BRIDGE’s utility business and functional system experts with specific experience in today’s ‘best of breed’ business syste...

POWERGRID International

May 2015
Volume 20, Issue 5


April 2015
Volume 93, Issue 2