Post by David B. Benson on May 7, 2019 16:27:36 GMT 9.5
Rather than fuel cells, gas turbine manufacturers are promoting
High-Volume Hydrogen Gas Turbines Take Shape Sonal Patel 2019 May 01 powermag.com
in which the proportion of hydrogen in the fuel can vary from little to even 100%, the last a claim from one vendor. As expected, NOX problems abound. Still, if there is a good source of hydrogen these turbines look more appealing than fuel cells. I easily could be wrong.
This should work well. Gas turbine technology is much more developed and robust than fuel cells.
The high exhaust temperature is a big advantage - a combined cycle or process heat stage can be added.
Hydrogen has a huge difference between lower heating value and higher heat value - a lot of energy is in the created steam exhaust. Recovering that energy, by condensing the steam, will be one of the keys to good efficiency.
The condensed steam would be very high purity, since its not contaminated by large amounts of combustion gas CO2, sulphur and so on. It would be valuable as demineralized water.
The age-old question is still - where do you get your hydrogen from?