NDLI: Nonventing, regenerable, lightweight heat absorber

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Nonventing, regenerable, lightweight heat absorber

Content Provider	NASA Technical Reports Server (NTRS)
Author	Izenson, Michael G. Chen, Weibo
Copyright Year	2008
Description	A lightweight, regenerable heat absorber (RHA), developed for rejecting metabolic heat from a space suit, may also be useful on Earth for short-term cooling of heavy protective garments. Unlike prior space-suit-cooling systems, a system that includes this RHA does not vent water. The closed system contains water reservoirs, tubes through which water is circulated to absorb heat, an evaporator, and an absorber/radiator. The radiator includes a solution of LiCl contained in a porous material in titanium tubes. The evaporator cools water that circulates through a liquid-cooled garment. Water vapor produced in the evaporator enters the radiator tubes where it is absorbed into the LiCl solution, releasing heat. Much of the heat of absorption is rejected to the environment via the radiator. After use, the RHA is regenerated by heating it to a temperature of 100 C for about 2 hours to drive the absorbed water back to the evaporator. A system including a prototype of the RHA was found to be capable of maintaining a temperature of 20 C while removing heat at a rate of 200 W for 6 hours.
File Size	83216
Page Count	1
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20080048058
Archival Resource Key	ark:/13960/t6q005x23
Language	English
Publisher Date	2008-12-01
Access Restriction	Open
Subject Keyword	Fluid Mechanics And Thermodynamics Rejection Thermal Absorption Evaporators Cooling Systems Space Suits Garments Lithium Chlorides Heat Radiators Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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