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Posted by Quasiturbine on September 19, 2011, 5:10 pm
 
Bonjour,

Here are few Quasiturbine video:

2006 Pneumatique Quasiturbine Chainsaw Demo
http://www.youtube.com/Quasiturbine#p/u/0/4w_TtUehk1s

2010 Quasiturbine all-day-long
in  Brash Vehicle  at University of Connecticut


2011 Quasiturbine Steam Demo at Oregon Steam-up
http://www.youtube.com/Quasiturbine#p/u/0/iRWymSse-6Y

Salutations, Gilles
http://www.quasiturbine.com

Posted by Orval Fairbairn on September 20, 2011, 4:14 am
 
In article


How much air does it take to run a chainsaw?

How about for a car?

Posted by Don Lancaster on September 20, 2011, 3:53 pm
 On 9/19/2011 9:14 PM, Orval Fairbairn wrote:

For over a century, the fire service has been attempting to get useful
portable work out of compressed air. To date, they have largely failed
miserably.

The energy density of compressed air is abysmally low. No efficient
means is known to compress air. For a compressed air motor or turbine to
be efficient, it would have to be both totally silent and exhaust at
zero velocity.

< http://www.tinaja.com/etsamp1.asp  >

--
Many thanks,

Don Lancaster                          voice phone: (928)428-4073
Synergetics   3860 West First Street   Box 809 Thatcher, AZ 85552
rss: http://www.tinaja.com/whtnu.xml    email: don@tinaja.com

Please visit my GURU's LAIR web site at http://www.tinaja.com

Posted by Mho on September 21, 2011, 10:23 pm
 Nice to see you again Don.

The energy groups on Usenet are basically dead and only filled with trolls
and spam, unfortunately.


--------

For over a century, the fire service has been attempting to get useful
portable work out of compressed air. To date, they have largely failed
miserably.

The energy density of compressed air is abysmally low. No efficient
means is known to compress air. For a compressed air motor or turbine to
be efficient, it would have to be both totally silent and exhaust at
zero velocity.

< http://www.tinaja.com/etsamp1.asp  >


Posted by GillesQT on September 20, 2011, 11:17 pm
 
Bonjour,

A perspective is presented on http://www.quasiturbine.com
I have no new argument to offer in complement:
Brayton cycle, combustion and steam piston, Wankel,
Stirling and Jet engines are all air machine,
without or with combuster inside or outside.

Expanders/compressors are extremely important
to handle energy in chemical process,
heat recovery, solar steam, geothermal, refrigeration cycle,
niche applications like in underground mining,
and for gas pipeline pressure energy recovery:
http://www.energypulse.net/centers/article/article_display.cfm?a_id=1105
or http://www.quasiturbine.com/QTGasPipelineValentine0508.htm

About car efficiency, DOT states that only
15% of the fuel energy is useful in a car:
http://www.fueleconomy.gov/feg/atv.shtml
an that exclude losses from extraction, refining, distribution...
Which lower the useful portion to 9 % !
More than half of the total energy in USA turn out to be lost heat:
http://www.eia.gov/totalenergy/
This is why I recommand reading:
Engine Exhaust Heat Recovery
Offering Essential Efficiency Characteristics:
http://www.energycentral.com/functional/reference/whitepapers_detail.cfm?di=
d=102474
or http://www.quasiturbine.com/QTPapiers/QTCromExhaustWP0612.doc

Air/steam motors are everywhere
and are the basis of modern industrial development.
Focussing on the marginal  worst case cool air tank
(reversibility way better than 9 %), the mobility
and the low air power density
are no valid basis for discrediting the technology.
Developpment of better expander/compressor
is one of the first step in improving the use of energy overall.
20 years is not much to make people understand the ramifications,
and it is worth the effort from our point of view...
Compressed gas technology is not perfect, nor other technologies are.
Sure, we understand that stealing hydrocarbon
from our underground could be for some a better solution.

Those who support 9 % efficiency solutions
and think that compressed gas technologies failed,
have better reasons than others to support
any new expander/compressor technology alternative.
Air chainsaw is a necessary first step demo!

Cordialement, Gilles
http://www.quasiturbine.com

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