Less expensive in terms of oxidizer cost per pound, yes. Less expensive in
terms of system cost, infrastructure as well as operational costs, I'm not
convinced of that. Having worked with both, why do you believe LOX is
significantly less "frustrating" than HTP?
Anthony J. Cesaroni
President/CEO
Cesaroni Technology/Cesaroni Aerospace
http://www.cesaronitech.com/
(941) 360-3100 x101 Sarasota
(905) 887-2370 x222 Toronto
-----Original Message-----
From: arocket-bounce@xxxxxxxxxxxxx [mailto:arocket-bounce@xxxxxxxxxxxxx] On ;
Behalf Of Ben Brockert
Sent: Monday, July 17, 2017 12:21 PM
To: arocket@xxxxxxxxxxxxx
Subject: [AR] Re: Car catalyst for HTP
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
