A little pencil work:
The heat of vaporization of liquid air is 88 Btu/lb (86 Btu/lb for LN2)
at 2546 Btu/hp-hr.
At 25% overall thermal efficiency (~10,000 Btu/Hp-Hr)120 lbs of LN2 would
have to be carried to deliver that 1.0 Hp-Hr.
LN2 at $.10/lb would cost you $12.00/Hp-Hr. :-)
OTOH,
Here is a handy psychrometric calculator that allows
calculation of how many pounds of air are required at
various temperatures-pressures to vaporize LN2 (86 Btu/lb heat of vaporization) etc.
as well as relative humidity-dew point etc.
http://www.linric.com/webpsy.htm
Frederick
In a message dated 2/15/05 5:24:18 PM Pacific Standard Time, [EMAIL PROTECTED] writes:
. This makes feasible many additional locations
for major wind energy generation, like Alaska. With sufficient research
and appropriate legislation, Alaska alone has the potential to provide the
US energy
[EMAIL PROTECTED] wrote:
If we use mini-airships, blimps and balloons which have windmills and
solar panels on them as well as communications equipment, then we can have
windmills floating above every city to generate power . . .
As I pointed out before, there are four problems with this plan:
- Original Message -
From: Horace Heffner [EMAIL PROTECTED]
To: [EMAIL PROTECTED]; vortex-l vortex-l@eskimo.com
Sent: Wednesday, February 16, 2005 10:40 AM
Subject: Re: Best Use for Wind energy?
snip
(wow! there is an earthquake going on right
now! Feels like a 4 or 5 magnetude
Because wind energy is becoming cheaper,but isoften not
available when or where it is most needed, here is a suggestion on the best way
to store wind energy.
Produce liquid air for atransportation fuel (i.e. energy storage
medium).
Let me repeat (as a query ) one more time for emphasis. Is
Horace wrote:
snip
[snip]
...compressors are much cheaper than electric generators, these wind
farms
should cost less.
A critical issue is efficient extraction of energy from the wind over a
range of vind velocities. Such is accomplished by the current genration of
wind tubines with the help
At 2:57 PM 2/15/5, Mike Carrell wrote:
Horace wrote:
snip
[snip]
...compressors are much cheaper than electric generators, these wind
farms
should cost less.
I did not write the above. In fact I questioned it. Jones wrote it.
Home heating efficiency and cost can be much improved by using
At 12:22 PM 2/15/5, Jones Beene wrote:
Anyway at the wind mill itself air can be compressed and then cooled and
recompressed however many times is necessary to give liquid air at an
optimum efficiency of 48 % of the torque. I disagree with Mike that this
process is not as efficient at low air
Horace Heffner wrote:
Though this is all good
discussion and the approach may yield practical
results for a while, it is important to realize that wind can not solve
all
the worlds energy problems, and working on a new *source* of energy is
the
big problem.
I'll bet wind could supply half the
I wrote:
I'll bet wind could supply half the world's energy, especially in
countries far from the equator. It could
easily supply all energy in the U.S. and Northern Europe, and most
in northern China.
And for that matter, I think ocean currents such as the Gulf Stream could
supply way more
Horace
Though this is all good discussion and the approach may
yield practical results for a while, it is important to
realize that wind can not solve all the worlds energy
problems, and working on a new *source* of energy is the big
problem.
Yes. I agree with most of what has been said here.
I think one of the best arguments in favor of the
cryo-fuel idea is that it's evolutionary. All of
the processes are known and only need to be scaled
up and made more efficient. Storage and transport
would automatically be more efficient on a larger
scale.
Although oil companies wouldn't be
At 5:31 PM 2/15/5, Jed Rothwell wrote:
Though this is all good discussion and the approach may yield practical
results for a while, it is important to realize that wind can not solve all
the worlds energy problems, and working on a new *source* of energy is the
big problem.
I'll bet wind could
Jones wrote:
snip
Anyway at the wind mill itself air can be compressed and then cooled and
recompressed however many times is necessary to give liquid air at an
optimum efficiency of 48 % of the torque. I disagree with Mike that this
process is not as efficient at low air speeds, but someone like
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