Gas Turbines are Centerstage in the Energy Future

During our visit to PowerGen 2025 in downtown Dallas, Turbomachinery International interviewed Jeffrey Benoit, Vice President of Clean Energy Solutions at PSM - a Hanwha company, and Bobby Noble, Senior Program Manager, Gas Turbine R&D at EPRI, about gas turbine-equipped power plants, hydrogen- and ammonia-fueled gas turbines, and other updates and advancements in the industry.

TURBO: With increasing renewable energy penetration, how will existing gas turbine-equipped power plants be modified to support an intermittent grid?

Noble: With the increased penetration of renewables, one thing we have to continue to focus on is the resiliency and reliability of the grid. Anytime you put an asset onto the grid that is not dispatchable and to the controls outside of your home, there are challenges. So, one of the things for gas turbines is filling that dispatchable need and being flexible and able to respond.

Benoit: For me, my company is responsible for retrofits, conversions, and upgrades for the installed fleet of gas turbines. So, one of the things that we're doing, and being asked for by our customers, is how to improve operational flexibility, how to improve efficiency, how to provide peaking power while maintaining emission compliance. All these technologies that we have can be manifested in products that can be easily dropped into these gas turbines, and you need that resiliency and the ability to modify the operational profile to balance renewables.

TURBO: What role will hydrogen- and ammonia-fired gas turbines play in a decarbonized future? What are the latest developments in these fields?

Noble: Hydrogen and ammonia add to our optionality, which is going to be key as we look at the needs for decarbonization. These fuels act not only as fuel and a potential fuel replacement for gas turbines but also as an energy-storage mechanism. Coupled with energy storage and the energy released at dispatchable opportunities, these will continue to be an avenue to help us have that resilient and reliable future.

Benoit: Fuel flexibility with hydrogen, refinery off-gas, or ammonia is just a natural extension of the flexibility inherent in the gas turbines. We are focused on combustion retrofits that allow hydrogen consumption up to 100%. So, think about this: meeting emissions requirements, with the ability to operate on 100% natural gas all the way with a variable blend up to 100% hydrogen—these are products that we've spent years and years developing in our test facility in Germany to make sure that we're not going to cause any issues with the operation of the power plant. Of course, the other side of the equation is where is the hydrogen or ammonia going to come from?