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Title: Establishing low-power operating limits for liquid metal heat pipes

Liquid metal heat pipes operated at power throughputs well below their design point for long durations may fail as a result of the working fluid migrating to a cold region within the pipe, freezing there, and hot returning to the evaporator section. Eventually sufficient working fluid inventory may be lost to the cold region to cause a local dry-out condition in the evaporator. A joint experimental and analytical effort between the Air Force Phillips Laboratory and Los Alamos National Laboratory is underway to investigate the phenomena. Experiments include both high temperature liquid metal and low temperature organic heat pipes. To date, a low temperature working fluid has been selected and its performance in a heat pipe validated. Additionally, a low-temperature heat pipe has been fabricated and is presently being tested.
Authors:
 [1] ; ;  [2]
  1. Phillips Lab., Kirtland AFB, NM (United States)
  2. Los Alamos National Lab., NM (United States)
Publication Date:
OSTI Identifier:
10137029
Report Number(s):
LA-UR--92-849; CONF-920981--1
ON: DE92011367
DOE Contract Number:
W-7405-ENG-36
Resource Type:
Conference
Resource Relation:
Conference: 8. international heat pipe conference,Bejing (China),14-18 Sep 1992; Other Information: PBD: [1992]
Research Org:
Los Alamos National Lab., NM (United States)
Sponsoring Org:
Department of Defense, Washington, DC (United States)
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; 21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; HEAT PIPES; PERFORMANCE TESTING; LIQUID METALS; LIMITING VALUES; FAILURES; EFFICIENCY; HEAT TRANSFER; WORKING FLUIDS; ALKANES; POTASSIUM; OPERATION 420400; 210600; HEAT TRANSFER AND FLUID FLOW; POWER REACTORS, MOBILE, PROPULSION, PACKAGE, AND TRANSPORTABLE