Spacecraft Carbon Dioxide Deposition Full-Scale System: Design, Analysis, Build and Test

Date

2023-07-16

Journal Title

Journal ISSN

Volume Title

Publisher

2023 International Conference on Environmental Systems

Abstract

The Carbon Dioxide Deposition (CDep) system is being developed for long-duration human space exploration toward the Moon, Mars, and beyond. It selectively deposits CO2 onto a cold surface directly from cabin air via phase change temperatures of air constituents. The cold surface is generated using flight-proven and highly reliable Stirling cryocoolers. The system also utilizes air-to-air heat exchangers to minimize its power draw, making it more efficient. The full-scale system is currently under development at NASA Ames Research Center. The system operates cyclically with two circuits that alternate deposition/sublimation processes for continuous CO2 removal. Each circuit consists of a single cooler to precool the air, two heat exchangers to improve the system's efficiency, and three coolers to generate a cold surface where CO2 will be deposited. The cold surface (finhead) was designed and 3D printed to achieve critical characteristics such as a large surface area, low mass, low pressure drop, and ease of manufacturing. System modeling is concurrently being developed in Modelica to predict system performance and optimize the full-scale system's design. This paper will detail the latest design, analysis, build, and planned testing of a full-scale CO2 deposition system ground test unit.

Description

Pranav Jagtap, KBR / NASA Ames Research Center, USA
Tiago Costa, KBR / NASA Ames Research Center, USA
Grace Belancik, NASA Ames Research Center, USA
Michael Schuh, NASA Ames Research Center, USA
Jason Samson, NASA Ames Research Center, USA
Kelby Gan, Mori Associates / NASA Ames Research Center, USA
ICES302: Physio-chemical Life Support- Air Revitalization Systems -Technology and Process Development
The 52nd International Conference on Environmental Systems was held in Calgary, Canada, on 16 July 2023 through 20 July 2023.

Keywords

CO2 Deposition system, CDep, Cryogenic carbon-capture, carbon-capture, cryocoolers, stirling coolers

Citation