CO2 and humidity removal system for extended Shuttle missions - Equilibrium testing and performance analysisIn Shuttle orbiter cabins, lithium hydroxide (LiOH) canisters are currently planned to be used for CO2 adsorption and condensing heat exchangers for humidity control. In this paper a more effective CO2 and humidity removal method is proposed by replacing the LiOH component with HS-C adsorbent (a polyethylenimine coated acrylic ester), thus eliminating the low temperature constraints on the active thermal control system. Since the adsorption of CO2 and H2O are reversible, a double bed configuration operating cyclicly is planned to provide continuous atmospheric control. Apparatus and the experimental procedure to test the adsorption equilibrium are described and some of the indicative results, tabulated by computers, are presented with the help of exponential expressions and differential equations. By using a computer model of the Shuttle HS-C system, performance predictions are made.
Document ID
19770036645
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Davis, S. H. (Rice University Houston, Tex., United States)
Kissinger, L. D. (NASA Johnson Space Center Houston, Tex., United States)
Date Acquired
August 9, 2013
Publication Date
July 1, 1976
Subject Category
Spacecraft Design, Testing And Performance
Report/Patent Number
ASME PAPER 76-ENAS-56
Meeting Information
Meeting: Intersociety Conference on Environmental Systems
Location: San Diego, CA
Start Date: July 12, 1976
End Date: July 15, 1976
Sponsors: American Society of Mechanical Engineers