Study on capillary pump loop (CPL) for space use (characteristics and performance test of CPL using two flat-plate-type evaporators)

Masafumi Katsuta, M. Matsushita, M. Murase, K. Nagata, K. Tanaka

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The capillary pump loop (CPL), which employs the latent heat of vaporization and condensation and does not need a driving source, is considered as a promising candidate for space thermal control systems because of its high reliability and lightness. In this study, the performance and characteristics tests using a prototype CPL model which has two flat-type evaporators and a reservoir as an operational control device was made. To withstand the wide range of heat loads in space applications, two tests, one conducted under an even heat load and the other under an uneven heat load, were performed. In these experiments, our interest was focused on the region where we can get stable operations, heat transfer mechanisms at the evaporator section and controllability of the reservoir. In order to investigate in greater detail the flow behavior of working fluid inside the evaporator section, visual observation was also carried out using a transparency loop. As a result, an important fundamental data base required for the establishment of the theoretical prediction of CPL performance was obtained.

Original languageEnglish
Pages (from-to)2021-2028
Number of pages8
JournalNippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume62
Issue number597
DOIs
Publication statusPublished - 1996 Jan 1
Externally publishedYes

Fingerprint

evaporators
performance tests
Evaporators
flat plates
Thermal load
Pumps
pumps
heat
Latent heat
Space applications
Controllability
Vaporization
heat of vaporization
Transparency
visual observation
control equipment
working fluids
Condensation
controllability
data bases

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering

Cite this

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AU - Katsuta, Masafumi

AU - Matsushita, M.

AU - Murase, M.

AU - Nagata, K.

AU - Tanaka, K.

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AB - The capillary pump loop (CPL), which employs the latent heat of vaporization and condensation and does not need a driving source, is considered as a promising candidate for space thermal control systems because of its high reliability and lightness. In this study, the performance and characteristics tests using a prototype CPL model which has two flat-type evaporators and a reservoir as an operational control device was made. To withstand the wide range of heat loads in space applications, two tests, one conducted under an even heat load and the other under an uneven heat load, were performed. In these experiments, our interest was focused on the region where we can get stable operations, heat transfer mechanisms at the evaporator section and controllability of the reservoir. In order to investigate in greater detail the flow behavior of working fluid inside the evaporator section, visual observation was also carried out using a transparency loop. As a result, an important fundamental data base required for the establishment of the theoretical prediction of CPL performance was obtained.

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