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Charley Rattan's picture
World Hydrogen Leader Charley Rattan Associates

UK based offshore wind & hydrogen corporate advisor and trainer; Faculty member World Hydrogen Leaders. Delivering global hydrogen and offshore wind corporate investment advice, business...

  • Member since 2019
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  • Jun 4, 2020
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With all the transnational plans it's refreshing to see real contracts and real communities benefitting from hydrogen.... Plans to integrate hydrogen fuel cells in its micro-grid project that will supply power to two remote villages...

 

 

 

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Dr. Amal Khashab's picture
Dr. Amal Khashab on Jun 4, 2020

Right now, nobody touches the efficiency and cost-effectiveness of this conversion process. Do you have any figures?

Bob Meinetz's picture
Bob Meinetz on Jun 4, 2020

Nobody touches it, Amal, because its roundtrip efficiency - not just electrolyzing water, but converting it back to electricity - is poor:

"...the overall energy efficiency of a typical lithium ion battery system is 0.83, compared to 0.30 for the reference case RHFC [Regenerative Hydrogen Fuel Cell] system."

In other words: when hydrogen is used to store energy, 70% of it is wasted. Since combustion of methane ("natural gas") will provide the reliable energy necessary to electrolyze water, efficiency and profitability are negatively correlated - the less efficient the system is, the more profitable it is in sales of methane.

In the end, any solution to climate change that incentivizes burning even more fossil fuel is no solution at all.

 

 

 

Charley Rattan's picture
Charley Rattan on Jun 4, 2020

Hi,  I'd recommend you contact Intelligent Energy for the figures as they may be commercially sensitive.

Dr. Amal Khashab's picture
Dr. Amal Khashab on Jun 6, 2020

Is that mean you give up?

This will discourage any useful discussion about such a new subject and turns it into: take it or leave it deal.

 

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