A Comparison between One- and Two-Loop ATCS Architectures Proposed for CEV

Document Number: 2009-01-2458

Date Published: July 2009

Author(s):
Dustin A. Ochoa - Jacobs Technology (ESCG)
Walt Vonau - Jacobs Technology (ESCG)
Michael Ewert - NASA Johnson Space Center

Abstract:
In an effort to help future crewed spacecraft thermal control analysts understand the characteristics of one- and two-loop Active Thermal Control Systems (ATCS), a comparison was made between the one- and two-loop ATCS architectures officially proposed for the Crew Exploration Vehicle (CEV) in Design Analysis Cycle 1 (DAC1) and DAC2, respectively. This report provides a description of each design, along with mass and power estimates derived from their respective Master Equipment List (MEL) and Power Equipment List (PEL). Since some of the components were sized independent of loop architecture (ex. coldplates and heat exchangers), the mass and power for these components were based on the MEL and PEL of the most mature design (i.e., two-loop architecture). The mass and power of the two architectures are then compared and the ability of each design to meet CEV requirements is discussed.

File Size: 421K
Product Status: In Stock

See other papers presented at International Conference On Environmental Systems, July 2009, Savannah, GA, USA, Session: CEV ECLSS and Thermal Control (Part 2 of 2)

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