American Supercritical Emerges From Stealth With $8 Million to Revolutionize Data Center Power With CO2 Technology

Stepping Out of Stealth With Fresh Capital

In an announcement that highlights the escalating energy demands of the modern technology sector, American Supercritical officially emerged from stealth on Wednesday, securing $8 million in initial funding. The newly unveiled startup aims to retrofit the inefficient gas turbines that a multitude of data centers heavily rely on for continuous power generation. By introducing its specialized units, the company intends to help these facilities generate significantly more electrical power without introducing additional direct emissions from the added equipment, even as the primary gas-fired turbines continue to release carbon pollution into the atmosphere.

The broader ambition for the firm extends far beyond the immediate horizon of natural gas infrastructure. According to cofounder Simon Shuham, the underlying technology holds theoretical applications across a wide variety of energy sources at a critical juncture when nationwide power demand is skyrocketing due to artificial intelligence, cloud computing, and industrial electrification. "We want to start with gas turbines but eventually expand beyond that," Shuham notes, outlining a long-term strategy to reshape how thermal energy is captured and converted across multiple heavy industries.

The Efficiency Gap in Data Center Power

To understand the engineering challenge American Supercritical is attempting to solve, one must examine how large-scale power generation typically operates in the United States. Most large gas-fired power plants utilize an array of heat engines in what is designated as a combined-cycle process. In this configuration, turbines first generate electricity by burning compressed air and natural gas, after which a separate engine harnesses the hot exhaust to make steam and create additional energy. However, for a variety of logistical, financial, and spatial reasons, data centers across the US have increasingly opted to power their operations with simpler setups known as simple-cycle turbines, deliberately omitting the steam component entirely.

These simplified turbines are markedly less efficient than their combined-cycle counterparts. Typically, only about 35 percent of the energy generated from simple-cycle turbines is successfully converted into usable electricity, while the remaining majority escapes directly into the atmosphere as exhaust. By comparison, efficiency figures in standard combined-cycle plants hover much closer to 60 to 65 percent. That staggering volume of escaping exhaust includes substantial amounts of greenhouse gases, making power plants running exclusively on simple-cycle turbines a drastically worse choice for environmental impact and carbon footprints.

The sheer scale of these operations combined with their inherent inefficiency has created what experts describe as a recipe for climate distress. A prime example can be found in Texas, where Amazon is currently building a massive data-center power plant utilizing exclusively simple-cycle turbines. According to regulatory filings and environmental permits, this single facility is authorized to emit more than 33 million tons of greenhouse gases per year - a figure that surpasses the annual carbon output of several small sovereign nations combined. The proliferation of such high-emission setups underscores an urgent need for retrofitting solutions.

Harnessing the Physics of Supercritical Carbon Dioxide

American Supercritical's leadership team argues that these small, inefficient turbines present an ideal match for supercritical carbon dioxide technology. Carbon dioxide transitions into a supercritical state when it is subjected to precise levels of intense pressure and held at a specific temperature threshold. In this unique phase, the fluid acquires the density of a liquid while retaining the transport behavior of a gas, enabling it to move thermal energy through dramatically smaller amounts of equipment with exceptional efficiency.

The startup plans to attach its proprietary units directly to small gas turbines to assist in generating augmented energy outputs. While the primary turbines will continue consuming natural gas, the supercritical CO2 unit can capture the hot exhaust generated by those turbines to create additional electricity. Instead of routing that heat to boil water for steam production, the thermal energy is transferred directly by the pressurized CO2 to generate supplemental power without generating any supplementary emissions. "We're essentially building miniature combined-cycle plants," explains Shuham.

Redefining Water Use and Closed-Loop Systems

Beyond efficiency gains, utilizing supercritical CO2 offers another vital advantage: it can entirely eliminate or drastically reduce water consumption within the power generation process. Water usage by data centers has faced intense public scrutiny and regulatory pushback as facilities expand in drought-prone regions. Importantly, the carbon dioxide utilized in American Supercritical's architecture operates entirely within a closed-loop system, meaning the working fluid does not need to be continually refilled or replenished during standard operations.

Cofounder Matthew Carlson, who has spent more than a decade researching supercritical CO2 dynamics, draws a functional parallel to standard commercial refrigeration systems that circulate CO2 to facilitate continuous cooling. Initially, the company plans to commercialize a 10-megawatt unit, which remains relatively modest by industrial gas plant standards. According to internal calculations by American Supercritical, integrating these supercritical CO2 units could boost turbine efficiency by up to 50 percent without triggering any incremental increases in greenhouse gas emissions or water utilization.

Broader Climate Realities and Long-Term Horizons

Despite the promising performance metrics of the technology, company leadership readily acknowledges that retrofitting the nation's inefficient gas turbines will not reduce data center emissions to absolute zero. The ongoing production and combustion of natural gas, even when paired with highly optimized turbines, continues to warm the planet. Furthermore, the relentless expansion of data centers represents a massive, growing source of industrial power demand and pollution at a historical moment when global scientific consensus dictates scaling back fossil fuel dependence.

The underlying concept of utilizing supercritical CO2 for power generation is not entirely new; it has been studied rigorously for more than 50 years across various US national laboratories. Over the past two decades, however, research initiatives have steadily transitioned away from purely theoretical physics toward practical, deployable engineering prototypes. As American Supercritical brings its newly funded hardware to the market, it enters a high-stakes arena where technological innovation must race against escalating environmental pressures.