Timeline for Was there a mechanism to vent fuel cell reactants on the Shuttle orbiter?
Current License: CC BY-SA 4.0
9 events
| when toggle format | what | by | license | comment | |
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| May 19, 2021 at 20:07 | comment | added | Uwe | @ymb1 The other answer does NOT go against what I wrote. You found an issue where there is none. | |
| May 19, 2021 at 18:21 | comment | added | ymb1 | The other answer says: In fact normal ops was turning heaters on to keep the pressure up. / This goes against what you wrote: "[The] stock of supercritical oxygen and hydrogen of a Shuttle would slowly get warmer, pressures rises and some gas should be vented to hold pressure below limit." – and here you used the wrong valve. I hope this highlights my issue. Many a times I've got answers wrong, never was a big deal retracting them. | |
| May 19, 2021 at 18:15 | comment | added | Uwe | If there is an over pressure in the tank to be vented through a relief valve, that gas is lost. If gas is lost to prevent an over pressure, time in orbit is limited. Losing a gas for the fuel cells without any effect to maximum time in orbit is impossible. | |
| May 19, 2021 at 16:53 | comment | added | ymb1 | Back to the question at hand: And that would explicitly happen simply when the fuel cells are not used? (Thus being a limiting factor to time in orbit?) Nothing so far confirms that. | |
| May 19, 2021 at 16:49 | comment | added | Uwe | If there is a tank over pressure, there is nothing else than to vent the gas to the outside through the relief valve. Bursting a tank should be prevented in any case of over pressure. | |
| May 19, 2021 at 16:47 | comment | added | ymb1 | Thanks for the extra quote: "flow back to their tanks" is as I expected, i.e. not the venting that was alluded to being lost. I think the answer can benefit from making the distinction clearer in the opening line. | |
| May 19, 2021 at 16:45 | history | edited | Uwe | CC BY-SA 4.0 |
added 465 characters in body
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| May 19, 2021 at 16:42 | comment | added | ymb1 | A relief valve can be back to the tank to limit the reactant pressure going to the fuel cells. Or it can be something else. But is it explicitly venting to the outside getting lost? Hence the "what were the conditions required?" My point: as is, no one can be sure it's correct without more details, even if it is. | |
| May 19, 2021 at 16:29 | history | answered | Uwe | CC BY-SA 4.0 |