AAE450 Senior Spacecraft Design

Crystal WilcoxWeek 3: February 1st, 2007

Structures Group

Mars Habitat , Transfer Vehicle (Crew Hab)

AAE450 Senior Spacecraft Design

Mars Habitat SpecificationsMass, Volume, Thickness of Radiation Shielding and Material

Living Quarters: Surface Area (m2) Volume (m3)  

  69.115 43.9823  

  Thickness (m) Volume (m3) Mass (kg)

Polyethylene 0.16 11.0584 11058.4

Aluminum 0.05 3.45575 9606.99

Total LQ Shielding 0.21 14.51415 20665.39

Common Area: Surface Area (m2) Volume (m3)  

  175.929 150.796  

  Thickness (m) Volume (m3) Mass (kg)

Polyethylene 0.02 3.51858 3518.58

Aluminum 0.01 1.75929 4890.83

Total CA Shielding 0.03 5.27787 8409.41

Material Thickness (m) Volume (m3) MassAL (kg)

Aluminum 7075 0.139669 10.3469 29074.8

Structure + Shielding 0.169669 15.62477 37484.21

Systems Section:      

  Thickness (m) Volume (m3) Mass (kg)

Polyethylene 0.02 3.51858 3518.58

Aluminum 0.01 1.75929 4890.83

Aluminum 7075 0.139669 10.3469 29074.8

Total SS Shielding 0.169669 15.62477 37484.21

Mitchell's Numbers from Human Factors For Radiation Shielding  

  Mass Consumables Shielding Material Systems

(kg) 21793.5 29074.8 29074.8 5639.25

  Volume Consumables Shielding Material Systems

(m^3) 149.136 19.792 10.3469 9.086

Total Mass (kg) 85582.35

Total Volume (m^3) 188.3609

Total Volume of Shell (m^3) 30.1389

AAE450 Senior Spacecraft Design

  Height (m) Diameter (m) Surface Area (m2)

Living Quarters: 3.5 4 69.115

Common Area: 3 8 175.929

Systems Section: 3 8 175.929

AAE450 Senior Spacecraft Design

Backup – Schematic

• Living Quarters– Center of Habitat.– Taller Than the Common Area surrounding it. – More Radiation Shielding.– Separated in 4 Sections for Private Quarters.– One Bed on Floor. – One Bed that Comes out of the inner wall

Closest to the center.

AAE450 Senior Spacecraft Design

Backup – Schematic

• Common Area– Kitchen Area– Bathroom Area– Small Food Storage Area– Rest is Split up into 4 common rooms

• Supply Area – Below the Common Area/Living Quarters– Atmosphere Supply– Water Supply– Mass Food Storage

AAE450 Senior Spacecraft Design

Backup – Material Properties

 Elastic Modulus

(Pa) Poisson's Ratio Density (kg/m^3)Yield Strength

(Pa) Ultimate Tensile

Strength (Pa)

Shear Modulus (Pa)

Aluminum 7075 72400000000 0.33 2780 440000000 572000000 28000000000

  Density (kg/m^3) Volume (m^3) for thickness in living quarters Volume (m^3) for thickness in Common Area

Polyethylene 1000 11.0584 3.51858

Aluminum 2780 3.45575 1.75929

Volume = Surface Area x Thickness

AAE450 Senior Spacecraft Design

Backup – Forces and Stress

Common Area    

  Mars Earth

Forces (N) 216696 570253

Stress (Pa) 159647 420123

System Area    

  Mars Earth

Forces 297910 783974

Stress 219479 577576

These Stresses pass the Yield Strength of the Aluminum 7075

AAE450 Senior Spacecraft Design

Backup – Calculations

Surface Area of a Cylinder = 2*pi*r^2 +2*pi*r*h

Mass = Density x Volume

Volume = MAL7075 / DensityAL7075

Volume = pi*h*tAL7075*(D – tAL7075)

Stress = Force / (Base*thickness)

Fmars = (Mrs + MAL7075)x(0.38g)

FEarth = (Mrs + MAL7075)x(1g)

AAE450 Senior Spacecraft Design

Backup – Kate Mitchell’s TotalsTotal Mass and Volume for Habitat 2

Max Water on board (at one time) 25022.624 kgWater Storage Volume 25.02 m3

Water total and Food Total

Max Food on board (at one time) 19430.4 kg

Food Volume 67.584 m3

Component Mass (kg) Volume (m3)

Consumables* 57730.57 126.84

Crew Accommodations 4994.90 27.07

Water Recycling System 200.00 0.80

Atmospheric Supply System 5440.85 8.37

Private Quarters - 60.00

Crew Common Area - 60.00

Radiation Shielding 26638.00 -

Totals 95004.32 283.08

Conservative (120%) Totals 114005.18 339.70

AAE450 Senior Spacecraft Design

Backup – Kate Mitchell’s

Components Mass (kg/p) Mass (kg) Volume (m3/p)Volume

(m3)

Sabatier Reactor (2x) [5] 76 304 0.14 0.56

O2 Tankage [1] - 1128.15 - 2.15

N2 Tankage [1] - 3888.7 - 4.86

Contaminant Control System [5] 20 80 0.15 0.6

Redundant Parts (10% system hardware) - 38.4   0.116

Totals   5439.25   8.286

Water Recycling System

CO2 Removal/Oxygen Generation System

Water Recycling System Mass Units Mass (kg) Volume Units Volume (m3)

Vapor Compression Distillation (VCD) (2x)[5] 50 kg/p 200 0.2 m3/p 0.8

AAE450 Senior Spacecraft Design

Backup – Kate Mitchell’s  Mass Mass Units Subtotal (kg) Volume Volume Units Subtotal (m3)

Galley and Food Systems            

Cooking/eating supplies (pans, plastic dishes, plates, etc.) 5 kg/p 30 0.0014 m3/p 0.0084

Freezers 0.75 kg/kg food 14572.8 0.00393 m3/kg food 76.361472

Conventional Oven 50 kg 50 0.25 m3 0.25

Microwave oven 35 kg 35 0.15 m3 0.15

Sink, spigot for hydration of food and drinking water 15 kg 15 0.00135 m3 0.00135

Dishwasher 40 kg 40 0.56 m3 0.56

Waste Collection System            

Waste Collection System (1 toilet) 45 kg 45 2.18 m3 2.18

Personal Hygiene            

Shower 75 kg 75 1.41 m3 1.41

Handwash/mouthwash faucet 8 kg 8 0.01 m3 0.01

Personal hygiene kit 1.8 kg/p 10.8 0.005 m3/p 0.03

Clothing            

Washing machine 100 kg 100 0.75 m3 0.75

Clothes dryer 60 kg 60 0.75 m3 0.75

Recreational Equipment and Personal Stowage            

Personal stowage/closet space 50 kg/p 300 0.75 m3/p 4.5

Housekeeping            

Vacuum (prime + 1 spare) 8.7 kg 8.7 0.05 m3 0.05

Trash compactor/trash lock 150 kg 150 0.3 m3 0.3

Crew Health Care            

Exercise equipment 145 kg 145 0.19 m3 0.19

Medical/Surgical/Dental suite 1000 kg 1000 4 m3 4

Medical/Surgical/Dental consumables 500 kg 500 2.5 m3 2.5

AAE450 Senior Spacecraft Design

Backup – Mitchell’s Consumables

Consumable Mass Mass Units HAB1 (kg) HAB2 (kg)

Kitchen/oven cleaning supplies (fluids, sponges, etc) 0.25 kg/d 391 528

WCS supplies (toilet paper, cleaning solutions, filters, etc.) 0.05 kg/p/d 312.8 422.4

Contingency fecal and urine collection mittens/bags 0.23 kg/p/d (15 days) 13.8 13.8

Hygiene supplies 0.075 kg/p/d 469.2 633.6

Clothing 99 kg/p 396 396

Trash bags 0.05 kg/p/d 312.8 422.4

Total Mass     1895.6 2416.2

         

Consumable Volume Volume Units HAB1 (m3) HAB2 (m3)

Kitchen/oven cleaning supplies (fluids, sponges, etc) 0.0018 m3/d 2.8152 3.8016

WCS supplies (toilet paper, cleaning solutions, filters, etc.) 0.0013 m3/p/d 8.1328 10.9824

Contingency fecal and urine collection mittens/bags 0.0008 m3/p/d (15 days) 0.048 0.048

Hygiene supplies 0.0015 m3/p/d 9.384 12.672

Clothing 0.336 m3/p 1.344 1.344

Trash bags 0.002 m3/p/d 12.512 16.896

Total Volume     34.236 45.744

AAE450 Senior Spacecraft Design

Backup – References

• Specifications From Breanne and Kirk

• Kate Mitchell’s Mass and Volume Numbers From Human Factors

• www.braeunig.us/space/specs/ares.htm

• AAE 454 Webct Detailed notes