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Proceedings Paper

Design optimization of a hydrogen advanced loop heat pipe for space-based IR sensor and detector cryocooling
Author(s): Triem T. Hoang; Tamara A. O'Connell; Jentung Ku; C. Dan Butler; Theodore D. Swanson; Dmitry K. Khrustalev
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Paper Abstract

Next generation space infrared sensing instruments and spacecraft will require drastic improvements in cryocooling technology in terms of performance and ease of integration. Projected requirements for cryogenic thermal control systems are: high duty cycle heat loads, low parasitic heat penalty, long transport distances, highly flexible transport lines, and lower cooling temperatures. In the current state of cryocooling transport technology, cryogenic Loop Heat Pipes (CLHPs) are at the forefront of intensive research and development. CLHPs are capable of dispersing heat quickly from an IR heat source and transporting it to remotely located cryocoolers via small and flexible transport lines. Circulation of working fluid in a CLHP is accomplished entirely by capillary action developed in fine pore wicks of the system capillary pumps. Thus they contain no mechanical moving parts to wear out or to introduce unwanted vibrations to the spacecraft. A recently developed CLHP using Hydrogen as the working fluid performed extremely well in the temperature range of 20-30K under the most severe operating conditions. However, it was not optimized for spacecraft applications due to cost and schedule constraints of the initial research phase. Design optimization of the Hydrogen Advanced Loop Heat Pipe is the main objective of the follow-on research. Chief among the system improvements is the weight and volume reduction of the loop components.

Paper Details

Date Published: 15 October 2003
PDF: 11 pages
Proc. SPIE 5172, Cryogenic Optical Systems and Instruments X, (15 October 2003);
Show Author Affiliations
Triem T. Hoang, TTH Research, Inc. (United States)
Tamara A. O'Connell, TTH Research, Inc. (United States)
Jentung Ku, NASA Goddard Space Flight Ctr. (United States)
C. Dan Butler, NASA Goddard Space Flight Ctr. (United States)
Theodore D. Swanson, NASA Goddard Space Flight Ctr. (United States)
Dmitry K. Khrustalev, Thermacore International, Inc. (United States)

Published in SPIE Proceedings Vol. 5172:
Cryogenic Optical Systems and Instruments X
James B. Heaney; Lawrence G. Burriesci, Editor(s)

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