Progress on the CO2 Removal and Compression System

The Carbon Dioxide Removal and Compression System (CRCS) is designed to perform both the Carbon Dioxide (CO 2 ) removal function of the four-bed molecular sieve (4BMS) system currently employed on the International Space Station (ISS), as well as additional integrated ability to thermally compress CO 2 to supply downstream CO 2 recovery units. The CRCS approach will reduce cost and improve reliability for future long-duration missions. This paper describes progress in CRCS development over the past year. Performances of the bulk air dryer (BAD) and residual air dryer (RAD) have been previously reported. A single unit of the 2-Stage compressor was assembled and tested for development performance. Data from those tests was used in the assembly of a second unit and integration into a two-unit system.