ECLSS definition for a low cost space construction base

You are here: Homepage > Search

ECLSS definition for a low cost space construction base

Nelson, W.G.

The Space Station System Analysis Study was a NASA funded contract to identify cost-effective Space Station systems options for a manned space facility capable of orderly growth with regard to both function and orbit location. The last portion of this study defines a series of program alternatives and refines associated system design concepts so that they satisfy the requirements of the low earth orbit program option in the most cost effective manner. This paper presents a description of key trade studies performed to select ECLSS concepts for the low cost SCB. The selected ECLSS was then defined in sufficient detail to allow a valid assessment of its impact on the various candidate SCB program options. Key guidelines and trade factors used in the trade study are also included. Not all possible concepts for each ECLSS function were evaluated, only key trades were performed. These included the following (a) airlock pumpdown versus expendable atmosphere (i.e. overboard dump), (b) open oxygen loop CO2 control concept (LIOH versus solid amine), (c) oxygen recovery tradeoff, and (d) water recovery tradeoff. Basis for the ECLSS tradeoffs was cost and, therefore, all major impacts of implementing a concept was reduced to a cost value. Costs given are equivalent costs and do not reflect only ECLSS costs. (Kursetz)