Traditional Ocean thermal energy conversion (OTEC) is proven to work, it’s just renewable organic Rankine cycle.
Traditional OTEC could have been made to work 100 years ago, in fact most if not all the parts can come from well-known public companies.
Traditional OTEC is expensive so it is not competitively priced on small or even large scales, furthermore, larger scale projects have feasibility problems.
New-otec means a new cold-water delivery system, and a new lower cost.
Now the promise of 24-7 clean power throughout the tropics and beyond can become a reality.