A Comparison of the Apollo and Early Orion Environmental Control, Life Support and Active Thermal Control System's Driving Requirements and System Mass

Cross, Cynthia; Lewis, John F.; Tuan, George C.

doi:10.4271/2008-01-2081

Cited by 6 publications

(1 citation statement)

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“…However, due to safety reasons, it is required that the pressure difference between EVA (extravehicular activity) suit and the internal atmosphere should be as small as possible. Cross et al (2009) [15] compared the cabin pressure of Apollo and Orien driving environment and mentioned that the internal pressure of the lunar habitat that maintains within the range of 34.5kPa to 101.4kPa could provide astronauts with comfortable living environment. Therefore, in this study, the internal pressure of 69kPa is used.…”

Section: Internal Air Pressurementioning

confidence: 99%

Preliminary structural analysis of a conceptual design for a small-scale eractable lunar habitat

Chen¹,

Fan²,

Yang³

et al. 2018

Creative Construction Conference 2018 - Proceedings

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Manned lunar exploration, again, becomes a research focus in recent years, and a number of the leading countries and regions, have announced their own programs. Beyond moon landing, scientists and engineers have started paying more attention on construction techniques for lunar habitation base. This paper introduces a new conceptual structural design of an erectable lunar habitat, using prefabricated building blocks made from the in-situ lunar regolith. The flank wall and foundation of the lunar habitat are fabricated by cubic blocks, among which joggle joint is adopted. Moreover, the roof is erected by arch segments with joggle joint as well and a 2m-thick lunar regolith layer is placed on top to shield the whole structure against the hostile environment. As to the environmental conditions on the Moon (1/6 of the earth gravity, temperature variation of approximate 300K within a lunar day and frequent moonquake), those loads, which would be regarded as irregular on earth, are actually regular for our lunar habitat structure. In order to investigate the behavior of the structure under such extreme loading, a 2D numerical model is established using the finite element software, ABAQUS. In this preliminary study, responses of the habitat structure under static loads of self-weight, overburden pressure, internal air pressure and temperature variation, are simulated. The simulation results give us some requirements on the structural design of this erectable lunar habitat. Several concluding remarks are drawn for both the building block system and the In-Situ Resource Utilization (ISRU) technique of lunar regolith.

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Section: Internal Air Pressurementioning

confidence: 99%