Recent Examples of working fluid from the Web
But the biggest leap here is using carbon dioxide rather than steam as the working fluid.
In some plants, sunlight is directed toward a large central thermal tower that heats up quickly and boils a working fluid inside.
It is then stored at 566 degrees Celsius (1,050 degrees Fahrenheit) and used to transfer heat through a heat exchanger to a working fluid that spins a conventional turbine, generating electricity.
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