Is StarRotor's Novel Engine Design the Future of Efficient Energy?

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Discussion Overview

The discussion centers around the novel engine design proposed by StarRotor, which is based on the Brayton Cycle. Participants explore its potential efficiency claims, design simplicity, and material requirements compared to traditional engines, particularly in the context of automotive applications.

Discussion Character

  • Exploratory
  • Debate/contested
  • Technical explanation

Main Points Raised

  • Some participants express interest in the efficiency claims of the StarRotor engine, suggesting it could be a significant advancement if it functions as intended.
  • Concerns are raised regarding the low compression ratio of 6:1, which some argue may lead to lower efficiency compared to conventional Otto cycle engines.
  • Others counter that the Brayton cycle can operate effectively with lower compression ratios due to high volume flows typical in gas turbines and jet engines.
  • Participants note potential challenges such as corrosion from hot gases, thermal expansion affecting close fits, and the risk of leakage, questioning the practicality of the design.
  • There is a mention of the historical context of rotor engines, with some arguing that they offer advantages like fewer moving parts and potentially better efficiency.
  • One participant acknowledges the efficiency claims might be plausible but does not elaborate further.

Areas of Agreement / Disagreement

The discussion reflects a mix of viewpoints, with no clear consensus on the viability or efficiency of the StarRotor engine design. Participants express both optimism and skepticism regarding its potential and challenges.

Contextual Notes

Some participants reference the lack of a working prototype as a significant factor in evaluating the design's feasibility. Additionally, there are unresolved questions about the implications of the Brayton cycle's isobaric nature and sealing issues in the combustion chamber.

Kenneth Mann
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I decided to try my hand at initiating a discussion. In particular, I'm interested in what others think about the rather novel (Brayton Cycle) engine design at (www.starrotor.com) and its claims? It's, in principle, the same type of continuous burn engine as in jet aircraft, but with somewhat simpler design and less requirement for exotic materials. Note in particular, their efficiency claims. If it works as planned, it might be interesting.

KM
 
Physics news on Phys.org
link rotted
 
The link works just fine!

KM
 
Maybe its just for the prototype, but a 6:1 compression ratio means pretty low efficiency - worse than a regular car (otto cycle) engine. Regardless, they are still pretty early in the development. We'll need to wait and see. I'm definitely in favor of brayton cycle engines in cars if its feasible though.
 
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Actually I think that you're applying the limitations of an Otto cycle to the Brayton cycle. Gas turbines and jet engines have low compression ratios but high volume flows.

KM
 
A higher compression ratio is still better.

KM
 
Interesting concept. I think it seems like it will eventually be quite feasible, if not soon. It would be cool to see this go into production. :cool:
 
It looks pretty good. But hot gas is corosive. Also heat make things expand, which would spoil close fit. Lots of leakage! They don't have a prototype running, which tells you how hard it is. Pistons with piston rings is hard to beat! Wes Hughes
 
Lets not forget the original rotor engine. Those are harder to beat, fewer moving parts = longer life. Plus better efficiency. Rotor engines have been in use for decades, the starrotor just looks like an American redesign. About time, too, sometimes we're pretty slow on the uptake.
 
  • #10
Deleted previous message: As I'm talking rubbish and thinking of something else altogeher.

Interesting idea, the efficiency claims aren't outside the realm of possibility either.
 
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  • #11
Wesley Hughes said:
But hot gas is corosive. Also heat make things expand, which would spoil close fit. Lots of leakage!
Isn't a Brayton cycle isobaric?
The combustion chamber is open to the output turbine - there isn't anything to seal.
 
  • #12
FYI...this thread is like 5 years old...LOL!

CS
 
  • #13
Balls! Can't believe I didnt notice that.
 
  • #14
Wow! Has it been that long. I feel old.

KM
 

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