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Forum index » Science and Technology » Engineering » Mechanics
Wind Turbo Newsgroup
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Bret Cahill
science forum Guru


Joined: 05 May 2005
Posts: 480

PostPosted: Mon Sep 05, 2005 1:07 am    Post subject: Re: Wind Turbo Newsgroup Reply with quote

Which is exactly why we need a wind turbo newsgroup.


Bret Cahill
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Pete Lynn
science forum beginner


Joined: 05 Apr 2005
Posts: 16

PostPosted: Sun Sep 04, 2005 11:29 pm    Post subject: Re: Wind Turbo Newsgroup Reply with quote

"Bret Cahill" <BretCahill@aol.com> wrote in message
news:1125856574.461462.67100@o13g2000cwo.googlegroups.com...
Quote:
Does 80% efficiency imply perpetual motion?

For wind turbines, yes.

What about 100% impulse gas turbines?

We need two things:

1. someone to cite some reference where Betz specifically mentions
nose cones to increase the circulation or wind speed and stator
blading
to feed a 100% impulse turbine, and,

2. a reason why the wind turbine above would have an efficiency less
than the 80% efficiency of the 100% impulse turbine in gas turbo.

Perhaps you believe extracting shaft energy from the kinetic energy of
moving air is fundamentally different from extracting it from
combustion gases.

Maybe you think using a nose cone to accelerate air is completely
different from having stator blading nozzles accelerate a gas.

Perhaps you think air would "pile up" behind an impulse wind turbine
but this effect would be negligible in the high speeds of gas turbo.

Until we get some answers then we need a wind turbo newsgroup.


Bret Cahill


*PLONK*

Pete.
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Bret Cahill
science forum Guru


Joined: 05 May 2005
Posts: 480

PostPosted: Sun Sep 04, 2005 3:56 pm    Post subject: Wind Turbo Newsgroup Reply with quote

< > Does 80% efficiency imply perpetual motion?

< For wind turbines, yes.

What about 100% impulse gas turbines?

We need two things:

1. someone to cite some reference where Betz specifically mentions
nose cones to increase the circulation or wind speed and stator blading
to feed a 100% impulse turbine, and,

2. a reason why the wind turbine above would have an efficiency less
than the 80% efficiency of the 100% impulse turbine in gas turbo.

Perhaps you believe extracting shaft energy from the kinetic energy of
moving air is fundamentally different from extracting it from
combustion gases.

Maybe you think using a nose cone to accelerate air is completely
different from having stator blading nozzles accelerate a gas.

Perhaps you think air would "pile up" behind an impulse wind turbine
but this effect would be negligible in the high speeds of gas turbo.

Until we get some answers then we need a wind turbo newsgroup.


Bret Cahill
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