Accession Number : AD0432490

Title :   ATMOSPHERIC CONTROL SYSTEMS FOR SPACE VEHICLES,

Corporate Author : GARRETT CORP LOS ANGELES CA AIRESEARCH MFG DIV

Personal Author(s) : Rousseau, J.

Report Date : FEB 1964

Pagination or Media Count : 219

Abstract : Analytical studies of atmospheric control systems, subsystems, and components are presented with emphasis on missions of extended duration. Subsystems are compared on the basis of feasibility, weight, power consumption, heat rejection loads, vehicle material balance, and reliability. The subsystems considered are gas storage, humidity control, carbon dioxide management, trace contaminant removal, and oxygen recovery systems. Results are presented from an experimental program performed to determine the cycling effects of continuous adsorption and desorption of carbon dioxide on molecular sieve. The test conditions were selected to simulate space vehicle environmental system application where desorption is accomplished by vacuum without the use of heat. Three materials, Linde Type 5A, Linde Type 13X, and Davison No. 522, were subjected to 500 adsorption-desorption cycles. The adsorption capacities of the materials before testing were then compared with the capacities after testing. To determine crystal structure changes, X-ray diffraction analyses were conducted. The tests revealed no changes in the adsorption characteristics or in the crystal structure of the sieve. (Author)

Descriptors :   *CONTROLLED ATMOSPHERES, SPACECRAFT CABINS, CLOSED CYCLE SYSTEMS, CLOSED ECOLOGICAL SYSTEMS, HUMIDITY, CARBON DIOXIDE, CONTAMINATION, AIR POLLUTION, OXYGEN, PHOTOSYNTHESIS, RELIABILITY, SAFETY, PURIFICATION, RECOVERY, OXYGEN CONSUMPTION, STORAGE, AIR CONDITIONING EQUIPMENT, MATHEMATICAL MODELS, THEORY, REDUCTION.

Distribution Statement : APPROVED FOR PUBLIC RELEASE