Open Access
ARTICLE
Evaporation Heat Transfer Characteristics from a Sintered Powder Wick Structure Sandwiched between Two Solid Walls
Yasushi Koito1,*, Shoma Hitotsuya2, Takamitsu Takayama2, Kenta Hashimoto2
1
Division of Industrial Fundamentals, Faculty of Advanced Science and Technology, Kumamoto University,
Kumamoto, 860-8555, Japan
2
Department of Mechanical and Mathematical Engineering, Graduate School of Science and Technology, Kumamoto University,
Kumamoto, 860-8555, Japan
* Corresponding Author: Yasushi Koito. Email: -u.ac.jp
Frontiers in Heat and Mass Transfer 2023, 21, 33-46. https://doi.org/10.32604/fhmt.2023.041829
Received 08 May 2023; Accepted 07 July 2023; Issue published 30 November 2023
Abstract
An ultra-thin flattened heat pipe has been developed with a centered wick structure. This structure is essential
to make the heat pipe thinner. However, the centered wick structure reduces the evaporation and condensation
surface areas of the wick structure because it is sandwiched between heat pipe walls. In this study, because detailed
discussion has not been made, heat transfer experiments were conducted for the wick structure sandwiched
between two solid walls. This study focused on the evaporation heat transfer characteristics from the sandwiched
wick structure. The experiments were conducted with three wick structures, that is, strip-shaped sintered copper
powders with thicknesses of 0.5, 1.0, and 1.5 mm. Water was used as working fluid. The capillary pumping
performance, that is, the liquid lifting velocities of the three wick structures were the same. The experimental results
of the three wick structures were compared regarding the relation between the evaporation heat transfer rate and
the superheat of the working fluid. The heat transfer experiments were also conducted when one of the solid walls
was removed from the wick structure. It was confirmed that even if the wick structure was sandwiched between the
solid walls, sufficient evaporation of the working fluid occurred from the thin sides of the wick structure.
Keywords
Cite This Article
APA Style
Koito, Y., Hitotsuya, S., Takayama, T., Hashimoto, K. (2023). Evaporation heat transfer characteristics from a sintered powder wick structure sandwiched between two solid walls. Frontiers in Heat and Mass Transfer, 21(1), 33-46. https://doi.org/10.32604/fhmt.2023.041829
Vancouver Style
Koito Y, Hitotsuya S, Takayama T, Hashimoto K. Evaporation heat transfer characteristics from a sintered powder wick structure sandwiched between two solid walls. Frontiers Heat Mass Transfer . 2023;21(1):33-46 https://doi.org/10.32604/fhmt.2023.041829
IEEE Style
Y. Koito, S. Hitotsuya, T. Takayama, and K. Hashimoto "Evaporation Heat Transfer Characteristics from a Sintered Powder Wick Structure Sandwiched between Two Solid Walls," Frontiers Heat Mass Transfer , vol. 21, no. 1, pp. 33-46. 2023. https://doi.org/10.32604/fhmt.2023.041829