Re: Current prices for bulk quantities of LOX, CO2 and H2

root@xxxxxxxxxxxxxx (Ian Stirling) wrote in
news:Fsqdnfj5CuJ7f_3VRVnygwA@xxxxxxxxxxxxxx:

Richard D. Latham <lathamr@xxxxxxxxxx> wrote:
<snip>
"A Realistic Look at Hydrogen Price Projections" by F.David Doty has
some data claiming that the floor (best case) price (2004 dollars and
electricity, fully burdened for things like depreciation, etc.) for
electrolsis from H2O would be $5.40 a Kg, compressed gaseous H2.

But you don't do that - hydrogen is much cheaper made from natural
gas, as I understand it.
Does the paper address this?


Oxygen for aerospace use is made by crygenic distillation of air; air
is the raw material being about 21% pure oxygen and electricity is
the energy needed to operate the refrigeration equipment. In other
words, exclusive of transportation and storage, it's pretty cheap if
your electricity is cheap but diesel-powered portable LOX plants aren't
that expensive--SpaceX uses one on Kwajelein.

Liquid hydrogen is made using natural gas, by the same companies that
provide _large_ quantities of hydrogen to the petrochemical industries.
Refrigeration is a significant part of the cost--LH2 is >really> cold!

http://www.astronautix.com/props/loxlh2.htm

This rather dated source claims a price of $.08/kg in the 80s for LOX
and $3.60 for LH2 in the 1980s. Figure on inflation, but some other
sources I'm finding in a Google search suggest very large delivered
quantities of LOX may be even lower.

At any rate gasoline probably costs more than LH2 now, though per unit
volume gasoline actually contains more hydrogen than LH2 (but of course
the results in a rocket engine are not the same).

(Where's Henry Spencer when we _need_ him for reliable information?)

Your local supplier of welding gasses may be able to provide you with
costs (but may have to call their supplier). How much were you planning
to use?


--Damon
.

Relevant Pages

  • Re: Wind energy a boon for farmers - tenfold returns !
    ... >>power from where the wind is, to where it isn't, at any time. ... >>Most of our electricity is gas produced. ... "justified" by the price of the gas which runs the turbines, ...
    (sci.physics)
  • Re: Wind energy a boon for farmers - tenfold returns !
    ... >>power from where the wind is, to where it isn't, at any time. ... >>Most of our electricity is gas produced. ... "justified" by the price of the gas which runs the turbines, ...
    (sci.energy)
  • Re: water heat - oil versus electric
    ... so that leaves me with the oil versus ... space to an electric water heater operation? ... the Nymex heating oil futures price stands at $3.70 and retail ... $0.16 per kWh (Connecticut's electricity rates are second only to ...
    (alt.home.repair)
  • Re: global warming
    ... Stuff i've read over years tells me that wind could never provide more than 10 to 12% of current uk energy needs and that even those figures have been skewed to conveniently omit the fact that there is no wind for much of the time. ... Probably something to with the fact that most windmills in the UK are placed offshore where there's a lot of corrosive salt water the shortens their life and needs lots of expensive maintenance whereas the coal fired generators are built in nice cosy buildings. ... the price of price of power, but that does seem to an inevitable ... As for the economy, what do you think would be the effect of doubling the price of electricity and gas, to any western economy ?. ...
    (sci.electronics.design)
  • Re: OT- Rush Limbaugh
    ... " From November 2000 through May 2001 California experienced a series of planned brownouts to groups of customers, for a limited duration, in order to reduce total system load and avoid a blackout due to alleged electrical shortages. ... an investigation by the California Public Utilities Commission into the alleged shortages later revealed that five energy companies withheld electricity they could have produced. ... In 2002 the commission concluded that the withholding of electricity contributed to an "unconscionable, unjust, and unreasonable electricity price spike." ...
    (rec.outdoors.rv-travel)