battery expansion

$135 million in funding secured for new Houston battery storage facility

SMT Energy is expected to bring a new battery storage facility online next year to support the ERCOT grid. Photo via Getty Images

Boulder, Colorado-based SMT Energy has secured $135 million in funding for a 160-megawatt battery energy storage facility, dubbed SMT Houston IV, according to an announcement.

The new facility will work to support the ERCOT grid by providing access to stored energy. The project is expected to be online by 2026 and store and dispatch enough electricity to power 8,800 homes in Texas annually.

Macquarie and KeyBanc Capital Markets were joint lead arrangers in a $100 million project financing facility. Macquarie's Commodities and Global Markets business will also provide a preferred equity investment and are mandated to sell the project's investment tax credits of approximately $62 million, according to SMT. KeyBanc will also act as a financial advisor to SMT.

North Carolina-based battery energy storage integrator FlexGen Power Systems will obtain equipment for the project. The project will also use FlexGen's energy management system software. The software provides site integration, site control and advanced analytics insights to maximize the availability and operating ranges of battery energy storage assets.

"FlexGen is proud to partner with SMT Energy on the deployment of the SMT Houston IV project, which will deliver critical services to the dynamic ERCOT power grid," Jason Abiecunas, Executive Vice President of Business Development with FlexGen said in the release.

In 2023, SMT Energy and joint venture partner SUSI Partners announced plans to add 10 battery storage projects to Texas, doubling capacity from 100 megawatts to 200 megawatts in the Houston and Dallas areas. SMT has a 2 gigawatt per hour pipeline of battery energy storage projects in ERCOT and Southwest Power Pool targeted for commercial operation by 2030, according to the release.

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A View From HETI

A team from UH has published two breakthrough studies that could help cut costs and boost efficiency in carbon capture. Photo courtesy UH.

A team of researchers at the University of Houston has made two breakthroughs in addressing climate change and potentially reducing the cost of capturing harmful emissions from power plants.

Led by Professor Mim Rahimi at UH’s Cullen College of Engineering, the team released two significant publications that made significant strides relating to carbon capture processes. The first, published in Nature Communications, introduced a membraneless electrochemical process that cuts energy requirements and costs for amine-based carbon dioxide capture during the acid gas sweetening process. Another, featured on the cover of ES&T Engineering, demonstrated a vanadium redox flow system capable of both capturing carbon and storing renewable energy.

“These publications reflect our group’s commitment to fundamental electrochemical innovation and real-world applicability,” Rahimi said in a news release. “From membraneless systems to scalable flow systems, we’re charting pathways to decarbonize hard-to-abate sectors and support the transition to a low-carbon economy.”

According to the researchers, the “A Membraneless Electrochemically Mediated Amine Regeneration for Carbon Capture” research paper marked the beginning of the team’s first focus. The research examined the replacement of costly ion-exchange membranes with gas diffusion electrodes. They found that the membranes were the most expensive part of the system, and they were also a major cause of performance issues and high maintenance costs.

The researchers achieved more than 90 percent CO2 removal (nearly 50 percent more than traditional approaches) by engineering the gas diffusion electrodes. According to PhD student and co-author of the paper Ahmad Hassan, the capture costs approximately $70 per metric ton of CO2, which is competitive with other innovative scrubbing techniques.

“By removing the membrane and the associated hardware, we’ve streamlined the EMAR workflow and dramatically cut energy use,” Hassan said in the news release. “This opens the door to retrofitting existing industrial exhaust systems with a compact, low-cost carbon capture module.”

The second breakthrough, published by PhD student Mohsen Afshari, displayed a reversible flow battery architecture that absorbs CO2 during charging and releases it upon discharge. The results suggested that the technology could potentially provide carbon removal and grid balancing when used with intermittent renewables, such as solar or wind power.

“Integrating carbon capture directly into a redox flow battery lets us tackle two challenges in one device,” Afshari said in the release. “Our front-cover feature highlights its potential to smooth out renewable generation while sequestering CO2.”

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