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Old 07-09-2020, 06:19 PM   #14 (permalink)
cRiPpLe_rOoStEr
It's all about Diesel
 
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Quote:
Originally Posted by serialk11r View Post
If you have a turbine that minimizes backpressure and use an electric motor to give the compressor a boost, then if you decouple the compressor you can extract a small amount of free electrical power even at part throttle.
Finding a safe way to decouple the compressor is the most challenging. Maybe instead of decoupling the compressor, it's still easier to divert the exhaust flow to another turbine connected to a generator, in a way somewhat similar to those twin-stage turbocharging setups.


Quote:
In practice, an engine isn't producing much blowdown energy at part throttle, so there's not much to collect, but hypothetically, a hypermiler would be better off deleting the compressor for efficiency.
To some extent it could help while cruising, but not all the time. At least not for most engines developed around the downsizing trend.
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