As an alternative to a submerged coil, rent a vaporizer from your friendly
neighborhood gas supplier. Note that 750 scfm is about .4 kg/s
http://www.fibatech.com/~fibatech/sites/default/files/clients/ACME_Co/Cryogenic_Vaporizer.pdf
On Jul 17, 2017, at 10:21 AM, Ben Brockert <wikkit@xxxxxxxxx> wrote:
If the objective is purely to make a gas generator for turbine
experiments, run a line from a liquid nitrogen dewar through a coil of
tubing in a barrel full of hot water. Huge amounts of clean, dry, room
temperature inert gas at a reasonable working pressure, and vastly
less expensive than getting set up with peroxide.
Then when the turbopump is into testing, develop a LOX/fuel gas
generator like basically every other modern GG cycle engine. It will
likely be cheaper and less frustrating than getting into peroxide.
On Mon, Jul 17, 2017 at 8:20 AM, Nate Vack <njvack@xxxxxxxxxxxxxxxx> wrote:
Just in case you've been following this thread and find yourself thinking
"OK, to get started on my HTP project, first I need to build a lab to purify
and/or concentrate my peroxide," you're venturing into a very
alligator-filled pool to start your swamp draining. There may be some fire-y
and explode-y surprises waiting for you in those endeavors.
But to the OP: You're looking to build a gas generator to drive a turbine.
Is this flight hardware, or something else? Do you care particularly about
performance today? Later? What kinds of flow rates are you looking at?
A lot of the thermal problems can be mitigated by using lower concentration
peroxide. Supply also gets easier at lower concentrations. Performance is
worse (and stabilizers can still poison your catalysts) but starting low to
see how things work might be useful.
Also (and if you've been reading the list for a while, you probably don't
need to hear this), don't skimp on peroxide safety. As others with more
experience have mentioned, HTP seems tame enough to make folks complacent.
-n
