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Reversible Power-to-Gas systems for energy conversion and storage

Reversible Power-to-Gas systems for energy conversion and storage

Abstract In the transition to decarbonized energy systems, Power-to-Gas (PtG) processes have the potential to connect the existing markets for electricity and hydrogen. Specifically, reversible PtG systems can convert electricity to hydrogen at times of ample power supply, yet they can also operate in the reverse direction to deliver electricity during times when power is relatively scarce. Here we develop a model for determining when reversible PtG systems are economically viable. We apply the model to the current market environment in both Germany and Texas and find that the reversibility feature of unitized regenerative fuel cells (solid oxide) makes them...

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Reversible fuel cells can support grid economically, Stanford researcher finds

Integrated reversible power-to-gas systems can also convert hydrogen back to electricity as a backup power source surprisingly economically, new research finds.  A major challenge for producers of electricity from solar panels and wind turbines is akin to capturing lightning in a bottle. Both solar and wind increasingly generate electricity amid little demand, when market prices are too low to cover costs. At noon on sunny days, for example, wholesale power prices in areas with high quantities of solar and wind occasionally fall below zero.     A reversible solid-oxide fuel cell system in Dresden, Germany. (Image credit: Sunfire GmbH) Some renewable...

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