Heat Transfer Enhancement of Small-Diameter Two-Phase Closed Thermosyphon Using Cellulose Nanofiber and Hydrophilic Surface Modification

In this study, we observed the Geyser phenomenon that occurs in a small-diameter two-phase closed thermosyphon (confinement number of 0.245). This phenomenon interferes with the natural circulation of the internal working fluid and increases the thermal resistance of the system. This study attempts...

Descripción completa

Detalles Bibliográficos
Autores principales: Choi, Dongnyeok, Jun, Gyosik, Hwang, Woonbong, Lee, Kwon-Yeong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8002205/
https://www.ncbi.nlm.nih.gov/pubmed/33800886
http://dx.doi.org/10.3390/nano11030647
_version_ 1783671409314103296
author Choi, Dongnyeok
Jun, Gyosik
Hwang, Woonbong
Lee, Kwon-Yeong
author_facet Choi, Dongnyeok
Jun, Gyosik
Hwang, Woonbong
Lee, Kwon-Yeong
author_sort Choi, Dongnyeok
collection PubMed
description In this study, we observed the Geyser phenomenon that occurs in a small-diameter two-phase closed thermosyphon (confinement number of 0.245). This phenomenon interferes with the natural circulation of the internal working fluid and increases the thermal resistance of the system. This study attempts to improve the thermal performance of the system using cellulose nanofiber as the working fluid and hydrophilic surface modification at the inner surface of the evaporator section. As a result, the total thermal resistance showed average reduction rates of 47.51%, 36.69%, and 22.56% at filling ratios of 0.25, 0.5, and 0.75, respectively.
format Online
Article
Text
id pubmed-8002205
institution National Center for Biotechnology Information
language English
publishDate 2021
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-80022052021-03-28 Heat Transfer Enhancement of Small-Diameter Two-Phase Closed Thermosyphon Using Cellulose Nanofiber and Hydrophilic Surface Modification Choi, Dongnyeok Jun, Gyosik Hwang, Woonbong Lee, Kwon-Yeong Nanomaterials (Basel) Article In this study, we observed the Geyser phenomenon that occurs in a small-diameter two-phase closed thermosyphon (confinement number of 0.245). This phenomenon interferes with the natural circulation of the internal working fluid and increases the thermal resistance of the system. This study attempts to improve the thermal performance of the system using cellulose nanofiber as the working fluid and hydrophilic surface modification at the inner surface of the evaporator section. As a result, the total thermal resistance showed average reduction rates of 47.51%, 36.69%, and 22.56% at filling ratios of 0.25, 0.5, and 0.75, respectively. MDPI 2021-03-06 /pmc/articles/PMC8002205/ /pubmed/33800886 http://dx.doi.org/10.3390/nano11030647 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) ).
spellingShingle Article
Choi, Dongnyeok
Jun, Gyosik
Hwang, Woonbong
Lee, Kwon-Yeong
Heat Transfer Enhancement of Small-Diameter Two-Phase Closed Thermosyphon Using Cellulose Nanofiber and Hydrophilic Surface Modification
title Heat Transfer Enhancement of Small-Diameter Two-Phase Closed Thermosyphon Using Cellulose Nanofiber and Hydrophilic Surface Modification
title_full Heat Transfer Enhancement of Small-Diameter Two-Phase Closed Thermosyphon Using Cellulose Nanofiber and Hydrophilic Surface Modification
title_fullStr Heat Transfer Enhancement of Small-Diameter Two-Phase Closed Thermosyphon Using Cellulose Nanofiber and Hydrophilic Surface Modification
title_full_unstemmed Heat Transfer Enhancement of Small-Diameter Two-Phase Closed Thermosyphon Using Cellulose Nanofiber and Hydrophilic Surface Modification
title_short Heat Transfer Enhancement of Small-Diameter Two-Phase Closed Thermosyphon Using Cellulose Nanofiber and Hydrophilic Surface Modification
title_sort heat transfer enhancement of small-diameter two-phase closed thermosyphon using cellulose nanofiber and hydrophilic surface modification
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8002205/
https://www.ncbi.nlm.nih.gov/pubmed/33800886
http://dx.doi.org/10.3390/nano11030647
work_keys_str_mv AT choidongnyeok heattransferenhancementofsmalldiametertwophaseclosedthermosyphonusingcellulosenanofiberandhydrophilicsurfacemodification
AT jungyosik heattransferenhancementofsmalldiametertwophaseclosedthermosyphonusingcellulosenanofiberandhydrophilicsurfacemodification
AT hwangwoonbong heattransferenhancementofsmalldiametertwophaseclosedthermosyphonusingcellulosenanofiberandhydrophilicsurfacemodification
AT leekwonyeong heattransferenhancementofsmalldiametertwophaseclosedthermosyphonusingcellulosenanofiberandhydrophilicsurfacemodification

Ejemplares similares