4 ms·

Lesics (another Youtube channel) argues that current turbines are already 90% efficient. For Tesla Turbines to reach the same efficency it needs to spin in real

Lesics (another Youtube channel) argues that current turbines are already 90% efficient. For Tesla Turbines to reach the same efficency it needs to spin in really high rpm (maybe 50 000), which makes it impossible to built disks for it. Those disks would have to be 2-3 meters in diameters for industrial applications and couldn’t withstand the forces.

tetha 3y ago
This wouldn't surprise me. Modern turbines are very, very optimized, because they are used in systems like power plants. Here, every fraction of a percent of efficiency is massive. Hence, modern turbines are optimized as much as many, many smart people can do. This in turn means, even if Tesla just designed something pretty efficient many years back (which would be really impressive), it just loses in modern, industrial applications. Like, people have been looking at better ways to generate electricity from nuclear or fusion reactors. But current steam and steam turbine systems have been optimized so hard and far, it's extremely challenging to find anything better than just heating water and jamming it through a turbine. Because current steam turbine systems are just that good. It reminds me of the recent thread about hypothetical usages of the recently discovered and not yet confirmed room temperature super conductor. So many people are just arguing that a potential material that was discovered 2 or 3 months ago would be worse than silicon based electronics we've been optimizing for 40 - 50 years, or steel-based long range transfer we've been optimizing for longer.
- kaba0 3y ago
  Also, people forget that Tesla was more of a “throw together until it works” inventor, not a scientist. He didn’t believe in goddamn electrons, even though that was already the accepted theory of the time! While many of his inventions are fascinating and genius, I think there is an unhealthy mythicism and hype around him. As for current turbines, I remember they are grown from a single crystal, as any kind of joint would be a breaking point in the material. They also have to abide by very strict size restrictions, at that RPM a single millimeter wobble can have catastrophic damage.
suoduandao2 3y ago
How does lesics arrive at that figure? In my turbine design course we were taught that the absolute maximum is around 57% else the outgoing fluid won’t have enough kinetic energy to get out of the way of the incoming
- greensh 3y ago
  I don't know. Here is the Video: https://www.youtube.com/watch?v=AfCyzIbpLN4 https://www.youtube.com/watch?v=AfCyzIbpLN4 And here with timestamp: https://youtu.be/AfCyzIbpLN4?t=448 https://youtu.be/AfCyzIbpLN4?t=448

tetha 3y ago

This wouldn't surprise me. Modern turbines are very, very optimized, because they are used in systems like power plants. Here, every fraction of a percent of efficiency is massive. Hence, modern turbines are optimized as much as many, many smart people can do. This in turn means, even if Tesla just designed something pretty efficient many years back (which would be really impressive), it just loses in modern, industrial applications. Like, people have been looking at better ways to generate electricity from nuclear or fusion reactors. But current steam and steam turbine systems have been optimized so hard and far, it's extremely challenging to find anything better than just heating water and jamming it through a turbine. Because current steam turbine systems are just that good. It reminds me of the recent thread about hypothetical usages of the recently discovered and not yet confirmed room temperature super conductor. So many people are just arguing that a potential material that was discovered 2 or 3 months ago would be worse than silicon based electronics we've been optimizing for 40 - 50 years, or steel-based long range transfer we've been optimizing for longer.

kaba0 3y ago
Also, people forget that Tesla was more of a “throw together until it works” inventor, not a scientist. He didn’t believe in goddamn electrons, even though that was already the accepted theory of the time! While many of his inventions are fascinating and genius, I think there is an unhealthy mythicism and hype around him. As for current turbines, I remember they are grown from a single crystal, as any kind of joint would be a breaking point in the material. They also have to abide by very strict size restrictions, at that RPM a single millimeter wobble can have catastrophic damage.

suoduandao2 3y ago

How does lesics arrive at that figure? In my turbine design course we were taught that the absolute maximum is around 57% else the outgoing fluid won’t have enough kinetic energy to get out of the way of the incoming

greensh 3y ago
I don't know. Here is the Video: https://www.youtube.com/watch?v=AfCyzIbpLN4 https://www.youtube.com/watch?v=AfCyzIbpLN4 And here with timestamp: https://youtu.be/AfCyzIbpLN4?t=448 https://youtu.be/AfCyzIbpLN4?t=448