All Questions
Tagged with cryogenics sub-cooled
6
questions
11
votes
1
answer
1k
views
Falcon-9's subcooled LOX is continuously refrigerated in-situ, what about its subcooled RP-1?
@Uwe's answer to Why would sub-cooled LOX tanks need to “topped-off” until the last minute or so? explains how subcooled LOX is kept cold and dense by "in situ refrigeration"; helium is bubbled ...
- 149k
1
vote
1
answer
228
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Could in situ (in-rocket) evaporative cooling/refrigeration be used for methane or hydrogen cryogenic propellants?
@Uwe's excellent answer to the question Why would sub-cooled LOX tanks need to “topped-off” until the last minute or so? explains that the LOX is sub-cooled in situ within the rocket's tank using ...
- 149k
4
votes
1
answer
631
views
Liquid Helium (4.2K) sealed, then raised to sub-LOX temperature (~70K) - what is the new pressure?
In this question there is discussion of the large differences in temperature between liquid helium-4, subcooled liquid oxygen (sub-LOX) and cold kerosene (RP-1). Approximate temperatures are 4.2K, ~...
- 149k
8
votes
4
answers
7k
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Autogenous pressurization with sub-cooled propellant
In his IAC 2016 talk, Elon Musk said (at 28m 4s in the video) that the ITS booster tanks would use autogenous pressurization. This means there is gaseous oxygen resp. methane in the tank. To stay ...
- 2,179
0
votes
1
answer
746
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Is the "cryogenic helium" system in recent discussions actually LHe for cryopumping?
I am wondering if the "cryogenic helium" system discussed in articles about the 1-Sept-2016 SpaceX Falcon 9 anomaly (see this answer for a good summary to date) is not actually related to the high ...
- 149k
26
votes
4
answers
5k
views
Does the NK-33 engine require subcooled kerosene so cold that it turns to wax?
It was mentioned in this answer and in several other places on the internet that the kerosene fuel used by NK-33 engines needed to be subcooled enough so that it reached the same density as the LOX, ...
- 149k