Supercritical what? Steam? GT exhaust isn't hot enough and the piping would be too expensive. CO2? Perhaps but not the best choice of fluids for a HRSG. Other options? https://read.amazon.com/kp/embed?asin=B07XD5P3H8&preview=newtab&linkCode=kpe&ref_=cm_sw_r_kb_dp_RFAF2K4R4PKC0WD37EJX
Thank you so much Prof. Dudley for your answer and the reference,
I mean supercritical steam, not CO2.
I understood that HRSG piping design would be too expensive to work on supercritical conditions, but there will be considerable savings that clukd recover its inverstment.
I will start studying this point, starting with the reference you've mentioned.
Many thanks
I have personal history with several supercritical steam plants. I can see Bull Run Steam Plant from my house. It was the most efficient power plant in the world for 12 years. I also performed many studies at the supercritical Paradise Steam Plant, which was demolished this past year but was the largest coal-fired plant in the world for many years. Nearby Cumberland Steam Plant was also supercritical. A friend of mine, Charles F. Bowman, who lives nearby (on the other side of Bull Run Steam Plant) did the thermal design for all three plants as well as all of TVA's nuclear plants. The boiler piping at Bull Run (30 MPa operating pressure) was a first to use a new steel alloy, was custom made, and cost more than the rest of the Plant. Charles published dozens of papers on piping material, corrosion, and fouling problems you may find helpful. There are several "Charles F. Bowman"s online. He is this one: https://www.amazon.com/Engineering-Power-Industrial-Cooling-Systems/dp/036777528X
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