TAGS: Industrial Coatings
The winner of this year’s Water Innovation Prize is a company commercializing a coating material that could dramatically improve the efficiency of power plants.
Creating Efficient Power Plant Steam Condenser
The company, Mesophase, is developing a more efficient power plant steam condenser that leverages a surface coating developed in the lab of Evelyn Wang, MIT’s Ford Professor of Engineering and the head of the Department of Mechanical Engineering. Such condensers, which convert steam into water, sit at the heart of the energy extraction process in most of the world’s power plants.
In the winning pitch, company founders said they believe their low-cost, durable coating will improve the heat transfer performance of such condensers.
Long-lasting Coating for Industrial Use
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What makes us excited about this technology is that in the condenser field, this is the first time we’ve seen a coating that can last long enough for industrial applications and be made with a high potential to scale up,” said Yajing Zhao SM ’18, who is currently a PhD candidate in mechanical engineering at MIT.
“When compared to what’s available in academia and industry, we believe you’ll see record performance in terms of both heat transfer and lifetime.”
In most power plants, condensers cool steam to turn it into water. The pressure change caused by that conversion creates a vacuum that pulls steam through a turbine. Mesophase’s patent-pending surface coating improves condensers’ ability to transfer heat, thus allowing operators to extract power more efficiently.
Based on lab tests, the company predicts it can increase power plant output by up to 7 percent using existing infrastructure. Because steam condensers are used around the world, this advance could help increase global electricity production by 500 terawatt hours per year, which is equivalent to the electricity supply for about 1 billion people.
Reduce Fresh Water Withdrawals
The efficiency gains will also lead to less water use. Water sent from cooling towers is a common means of keeping condensers cool. The company estimates its system could reduce fresh water withdrawals by the equivalent of what is used by 50 million people per year.
After running pilots, the company believes the new material could be installed in power plants during the regularly scheduled maintenance that occurs every two to five years. The company is also planning to work with existing condenser manufacturers to get to market faster.
“This all works because a condenser with our technology in it has significantly more attractive economics than what you find in the market today,” says Mesophase’s Michael Gangemi, an MBA candidate at MIT’s Sloan School of Management.
The company plans to start in the U.S. geothermal space, where Mesophase estimates its technology is worth about $800 million a year.
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Much of the geothermal capacity in the U.S. was built in the ’50s and ’60s,” Gangemi said.
“That means most of these plants are operating way below capacity, and they invest frequently in technology like ours just to maintain their power output.”
The company will use the prize money, in part, to begin testing in a real power plant environment.
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We are excited about these developments, but we know that they are only first steps as we move toward broader energy applications,” Gangemi said.
MIT’s Water Innovation Prize helps translate water-related research and ideas into businesses and impact. Each year, student-led finalist teams pitch their innovations to students, faculty, investors, and people working in various water-related industries.
Source: MIT