A new US-based startup, American Supercritical, has emerged with $8 million in funding to retrofit simple-cycle gas turbines commonly used by data centers. Their technology uses supercritical carbon dioxide to generate more electricity from turbine exhaust heat, promising up to 50% greater efficiency while not adding to emissions.
- Retrofits simple-cycle gas turbines used by data centers with supercritical CO2 units
- Boosts turbine efficiency up to 50% without increasing greenhouse gas emissions
- Uses closed-loop CO2 cycle, reducing water usage compared to steam-based combined cycles
What happened
American Supercritical emerged from stealth mode with an $8 million funding round to commercialize a technology that enhances power generation efficiency from gas-fired turbines often used by data centers. Unlike conventional combined-cycle plants that recover exhaust heat with steam turbines, many US data centers depend on simpler, less efficient gas turbines that waste heat and emit substantial greenhouse gas emissions.
The startup's solution utilizes supercritical carbon dioxide — CO2 pressurized and heated above its critical point, exhibiting properties of both a gas and liquid — to harness exhaust heat more efficiently. This approach allows the addition of a compact, closed-loop CO2 power generation cycle to existing turbines, yielding more electricity from the same fuel without generating extra emissions or consuming water.
Why it matters
Data centers represent a rapidly growing source of energy demand and carbon emissions, with some large facilities permitted to emit greenhouse gases on par with small countries. The current reliance on simple-cycle gas turbines exacerbates these challenges due to their low efficiency and greater emissions intensity compared to combined-cycle power plants.
By providing a retrofit solution that can increase turbine efficiency by up to 50%, American Supercritical’s technology addresses a significant emissions and resource-use problem without requiring full plant replacements. The reduced need for water in power generation is also crucial given increasing scrutiny over data center water consumption amid climate and resource concerns.
What to watch next
American Supercritical plans to initially commercialize their technology through 10-megawatt units designed to attach to small gas turbines used in data centers. The company aims to expand beyond gas turbines to other energy sources in the future, potentially broadening application and environmental impact.
While the technology improves turbine efficiency and reduces emissions intensity, it does not eliminate the carbon output associated with natural gas combustion. Monitoring the startup’s deployment scale and real-world performance, along with regulatory and data center industry adoption, will be key to assessing its role in the evolving energy landscape.