NDLI: Performance of a multifunctional space evaporator- absorber-radiator (sear)

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Performance of a multifunctional space evaporator- absorber-radiator (sear)

Content Provider	NASA Technical Reports Server (NTRS)
Author	Bue, Grant Quinn, Gregory Izenson, Michael G. Chen, Weibo
Copyright Year	2013
Description	The Space Evaporator-Absorber-Radiator (SEAR) is a nonventing thermal control subsystem that combines a Space Water Membrane Evaporator (SWME) with a Lithium Chloride Absorber Radiator (LCAR). The LCAR is a heat pump radiator that absorbs water vapor produced in the SWME. Because of the very low water vapor pressure at equilibrium with lithium chloride solution, the LCAR can absorb water vapor at a temperature considerably higher than the SWME, enabling heat rejection by thermal radiation from a relatively small area radiator. Prior SEAR prototypes used a flexible LCAR that was designed to be installed on the outer surface of a portable life support system (PLSS) backpack. This paper describes a SEAR subsystem that incorporates a very compact LCAR. The compact, multifunctional LCAR is built in the form of thin panels that can also serve as the PLSS structural shell. We designed and assembled a 2 sq ft prototype LCAR based on this design and measured its performance in thermal vacuum tests when supplied with water vapor by a SWME. These tests validated our models for SEAR performance and showed that there is enough area available on the PLSS backpack shell to enable heat rejection from the LCAR.
File Size	8095
Page Count	1
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20140007364
Archival Resource Key	ark:/13960/t49p8214t
Language	English
Publisher Date	2013-11-11
Access Restriction	Open
Subject Keyword	Man/system Technology And Life Support Performance Tests Heat Pumps Evaporators Thermal Vacuum Tests Prototypes Low Pressure Lithium Chlorides Temperature Control Water Vapor Portable Life Support Systems Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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