> How much air does it take to run a chainsaw?
>
> How about for a car?
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?did=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