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World's first commercial sCO2 power generator begins operation in China (youtu.be)

submitted 2 months ago* (last edited 2 months ago) by cfgaussian@lemmygrad.ml to c/china@lemmygrad.ml

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The world's first commercial supercritical carbon dioxide power generator has begun operation in Southwest China's Guizhou Province. It is viewed as a milestone in changing the power generation mode relying on steam for more than a century. China calls the project "Chaotan-1." CGTN's Zheng Yibing speaks to experts from Nuclear Power Institute of China about it.

Why is this such a big deal? Because traditional power generation relies on steam driven turbines, even in nuclear reactors. The thermodynamic losses in the process are substantial and a major barrier to more efficient power generation. With superheated CO2 as the medium, the efficiency of the energy conversion can be greatly increased and losses reduced.

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[–] cfgaussian@lemmygrad.ml 8 points 2 months ago (1 children)

This isn't my area of expertise, but here's a couple of papers that might answer your question:

Comparative Performance Analysis of Recuperative Helium and Supercritical CO2

SCO2 and CO2 as Working Fluids for Power Generation and Storage

My initial thoughts are that Helium is much lighter so maybe it requires a higher operating pressure to have the same efficiency, and the smaller molecule size could possibly lead to leakage issues? As i said, i'm not an expert.

[–] Malkhodr@lemmygrad.ml 4 points 2 months ago

Thank you!