PEM fuel cell deuterium generator

For posts specifically relating to fusor design, construction, and operation.
User avatar
Mark Rowley
Posts: 873
Joined: Sun Dec 29, 2002 5:20 am
Real name: Mark Rowley
Location: Sacramento California

Re: PEM fuel cell deuterium generator

Post by Mark Rowley » Tue Jun 11, 2019 5:59 am

Several of the Horizon PEM cell videos demonstrate gas collection in a syringe. If deuterium was collected in a large 100cc syringe, would the vacuum in a typical Fusor be sufficient to draw from it via a needle valve (resulting in the slow retraction of the plunger)? Or is it necessary that I have positive deuterium pressure?

Mark Rowley

User avatar
Bob Reite
Posts: 496
Joined: Mon Aug 26, 2013 1:03 am
Real name: Bob Reite
Location: Wilkes Barre/Scranton area

Re: PEM fuel cell deuterium generator

Post by Bob Reite » Thu Jun 13, 2019 1:13 am

The vacuum would be more than enough, you don't need pressure. In fact the PEM cell has to be protected from excessive positive or negative pressures.
The more reactive the materials, the more spectacular the failures.
The testing isn't over until the prototype is destroyed.

User avatar
Rich Feldman
Posts: 1383
Joined: Mon Dec 21, 2009 11:59 pm
Real name: Rich Feldman
Location: Santa Clara County, CA, USA

Re: PEM fuel cell deuterium generator

Post by Rich Feldman » Thu Jun 13, 2019 3:26 pm

Rex Allers has one of the PEM cell electrolyzers for refilling storage cartridges.
Puts out H2 even against back pressures of more than 400 psi.

As I've said before, maybe even in this very thread, there's no technical reason a membrane couldn't be supported on the hydrogen side, to withstand full vacuum. Then fusor gas flow would be controlled directly and immediately by the electrolyzer current setting.
All models are wrong; some models are useful. -- George Box

Post Reply

Return to “Fusor Construction & Operation (& FAQs)”