Life support resource amounts
 Share
The version of the browser you are using is no longer supported. Please upgrade to a supported browser.Dismiss

View only
 
ABCDEFGHIJKLMNOPQRSTUVWXYZAAABACADAEAFAGAHAIAJAK
1
2
Convert from Human consumption rates to Kerbal consumption ratesNote that all calculations use 1 in-game unit = 1 liter
3
4
Assumptions:kg
5
NASA's EVA suit used on board the ISS weights 145 kg fully loaded.145http://en.wikipedia.org/wiki/Extravehicular_Mobility_Unit#Enhanced_EMU
6
The Manned Maneuvering Unit (MMU) weights 148 kg fully loaded148http://en.wikipedia.org/wiki/Manned_Maneuvering_Unit#Overview
7
The typical NASA astronaut weights 154 lbs (70 kg)7019.28%http://ston.jsc.nasa.gov/collections/trs/_techrep/CR-2004-208941.pdf<- Table 3.3.6Older sources seem to say 80 kg, newer sources (ISS and after) seem to say 70 kg.
8
Total363
9
10
Kerbals are 0.8 m tall, compared to 1.8 m for humans
11
Kerbal suits come equipped with an MMU
12
A Kerbal on EVA weights 0.09 tons (90 kg) in game90http://wiki.kerbalspaceprogram.com/wiki/EVA
13
Total90
14
15
Kerbal mass
16
If the mass of the Kerbal's EVA suit is linearly proportional to NASA's19.28%17.4#1
17
Assuming Kerbals are 1/2 as tall, 1/2 as wide, and 1/2 as fat, and the same density12.50%8.8#2
18
Arbitrary value somewhere in between those15.71%11.0#3Chosen to make the consumption ratio below be 25%11.02430919
19
20
21
Food consumption ratio, using Kleiber's lawhttp://equation-of-the-month.blogspot.it/2012/06/kleiber-law.html
22
humansbasal metabolic rate, R=M^3/424.200
23
Kerbalsmass #18.50335.14%
24
mass #25.08821.02%
25
mass #36.04024.96%
26
27
Conclusion
28
Kerbals mass11.00kg24.20lbs
29
Consumption ratio25.00%
30
31
32
Consumption, units, mass, and volume
33
34
Oxygenkg/m^3kg/L
35
Density (gas)1.410.00141@ 0°C / 100 kPahttp://www.wolframalpha.com/input/?i=oxygen+at+0C+and+100+kPahttp://en.wikipedia.org/wiki/Oxygen
36
As compressed gas311.80.3118@ 0°C / 20 MPa (~197.4 atm)ratio221.1347518http://www.wolframalpha.com/input/?i=oxygen+at+0C+and+200+bar
37
As liquid11411.141@ -184.03°C / 100 kParatio809.2198582http://www.wolframalpha.com/input/?i=liquid+oxygen+at+100+kPahttp://en.wikipedia.org/wiki/Oxygenhttp://www.engineeringtoolbox.com/oxygen-d_1422.html
38
39
Human consumption
40
0.835kg/Earth-dayhttp://ston.jsc.nasa.gov/collections/trs/_techrep/CR-2004-208941.pdf<- Table 3.3.6http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20120015507.pdf<- slide 3
41
592.198582L/Earth-day
42
0.00685415024954L/sec
43
44
2.677999L/Earth-day (compressed)
45
0.731814L/Earth-day (liquid)
46
47
Kerbal consumption
48
0.20875kg/Earth-day25.00%of human consumption
49
0.0521875kg/Kerbin-day
50
37.012411L/Kerbin-day
51
0.001713537562385L/sec
52
53
0.167375L/Kerbin-day (compressed)
54
0.045738L/Kerbin-day (liquid)
55
56
Cost
57
0.000055836K$/LArbitrary value chosen to make the K$/kg price be slightly higher than Oxidizer
58
0.0396K$/kgOxidizer is 0.005 tons/L or 5 kg/L and costs 0.18 K$/L for0.036K$/kg
59
0.033066K$/Earth-dayReal life price is $3.00 per kghttp://www.chemicool.com/elements/oxygen.html
60
0.002066625K$/Kerbin-day
61
62
63
Food
64
kg/Earth-daym^3 volume
65
Human consumptionhttp://ston.jsc.nasa.gov/collections/trs/_techrep/CR-2004-208941.pdf<- Table 4.3.7also see 4.3.1 and 3.3.6 and 4.3.4
66
Dry mass0.66also seehttp://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20120015507.pdfhttp://www.projectrho.com/public_html/rocket/supplement/102202_LifeSupportPart1.pdfhttp://www.nasa.gov/pdf/146558main_RecyclingEDA(final)%204_10_06.pdfhttp://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20140005433.pdfhttp://www.agrospaceconference.net/sperlonga2006/07%20Wheeler%20-%20NASA%20research.pdf
67
Food "as-shipped"1.3752% water0.7124kg water-0.0024http://en.wikipedia.org/wiki/Life_support_system#Human_physiological_and_metabolic_needshttp://www.nasa.gov/audience/foreducators/stseducation/materials/Sustaining_Life.html
68
Rehydrated food "as-consumed"2.38
69
Additional drinking water1.153
70
Packaging mass0.2417.52%
71
Food locker mass0.250.0035418.25%volume is the space taken up by the food including packaging "as-shipped". 50% is provided frozen.
72
Freezer mass0.8080.0023158.98%
73
Trash mass0.29
74
75
Rehydration water1.01
76
Total water needed2.163
77
Total water consumed2.8754
78
Total Storage1.0580.0058564.35%
79
80
Food "as shipped" w/packaging1.64402kg/Earth-dayAdded 0.03402 kg/day because the numbers were not coming out right. Should be "total in == total out" :(
81
Food density "as-shipped" including packaging281.02905982906kg/m^3Storage
82
0.28102905982906kg/L64.35%% kg/Earth-day
83
1.55389414multiplier
84
Food volume consumed5.85L/Earth-day
85
0.000067708333333L/sec
86
87
Kerbal consumption
88
Food "as shipped" w/packaging0.411005kg/Earth-day25.00%
89
0.10275125kg/Kerbin-dayStorage
90
Food volume consumed0.365625L/Kerbin-day64.35%% kg/Kerbin-day
91
0.000016927083333L/sec1.55389414multiplier
92
Storage0.066125kg/Kerbin-day
93
94
Cost
95
0.238874700854701K$/L
96
0.85K$/kgArbitrary value
97
1.397417K$/Earth-day
98
0.0873385625K$/Kerbin-day
99
100
Loading...