Most Interesting ! and it shows the thought given detail, for a product that is obviously going into production. However, it is also a stretch to think that they did it solely for environmental or private use concerns. They are years away from proper permits to sell in the USA or EEC, so that stated "rationale" could be a poisson rouge. They do not want to give away too much.
Once again, hat's off to DGT - and it tends to highlight Rossi's comparative lack of engineering skills. However, this feature also tends to reinforce the conclusion of regular turnover of hydrogen being necessary, since the likelihood is as a safety issue for a commercial product, it came later in time. But when the need arose, it went hand in hand with the already addressed need to avoid quiescence, going back to the time of the split with Rossi. IOW they likely developed an elaborate purge system for one fundamental purpose but publicized it for another use, even though it accomplishes both elegantly. Time will tell - but that is my story for today (dual-use H2 purging system) and I'm sticking to it :) -----Original Message----- From: Terry Blanton http://defkalion-energy.com/forum/viewtopic.php?f=19&t=773 Depressurizing Hydrogen for safety/emergency reasons was a problem that we had to deal with during design of our products, following also the official recommendations and regulations on hydrogen handling (please see specs "Environmental and Safety", p19). According to them, degas to the environment is not permitted. Following our design, it is not needed. As you can notice in the released spec sheet, there is plenty of space in the filled with Argon tamper resistant compartment A of Hyperions. This is the area where degas procedure sends the Hydrogen in case of emergency through the exhaust valves. Casing specs, which we have not released in details, can "hold" the maximum internal pressure from such degassing. As it is proved during our internal safety/stress tests, the limited amount of very hot hydrogen in such Argon atmosphere creates no safety problems to the product nor its environment. We consider such emergency "hydrogen evacuation" as a result of the malfunction of several other safety systems related with the hydrogen circuit. As such, in the case of degas (Hydrogen in the Argon atmosphere), Hyperion will shut down, will turn to stand by mode and automatically will send an alarm message to Hyperion Support Center triggering a replacement and repair procedure for the product. Thank you for this good question <end>
