Experimental Observation of Natural Convection Heat Transfer Performance of a Rectangular Thermosyphon

C. S. Huang, Chia-Wang Yu, R. H. Chen, Chun-Ta Tzeng and Chi-Ming Lai
Additional contact information
C. S. Huang: Department of Mechanical Engineering, Southern Taiwan University of Science and Technology, Tainan 710, Taiwan
Chia-Wang Yu: Department of Architecture, National Cheng Kung University, Tainan 701, Taiwan
R. H. Chen: Department of Mechanical and Energy Engineering, National Chiayi University, Chiayi 600, Taiwan
Chun-Ta Tzeng: Department of Architecture, National Cheng Kung University, Tainan 701, Taiwan
Chi-Ming Lai: Department of Civil Engineering, National Cheng Kung University, Tainan 701, Taiwan

Energies, 2019, vol. 12, issue 9, 1-12

Abstract: This study experimentally investigates the natural convection heat transfer performance of a rectangular thermosyphon with an aspect ratio of 3.5. The experimental model is divided into a loop body, a heating section, a cooling section, and two adiabatic sections. The heating section and the cooling section are located in the vertical legs of the rectangular loop. The length of the vertical heating section and the length of the upper and lower horizontal insulation sections are 700 mm and 200 mm, respectively, and the inner diameter of the loop is 11 mm. The relevant parameters and their ranges are as follows: the input thermal power is 30–60 W (with a heat flux in the range of 60–3800 W/m 2 ); the temperature in the cooling section is 30, 40, or 50 °C; and the potential difference between the hot and cold sections is 5, 11, or 18 for the cooling section lengths of 60, 45, and 30 cm, respectively. The results indicate that the value of the dimensionless heat transfer coefficient, the Nusselt number, is generally between 5 and 10. The heating power is the main factor affecting the natural convection intensity of the thermosyphon.

Keywords: heat transfer; energy; thermosyphon; natural circulation loop (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

Downloads: (external link)
https://www.mdpi.com/1996-1073/12/9/1702/pdf (application/pdf)
https://www.mdpi.com/1996-1073/12/9/1702/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:12:y:2019:i:9:p:1702-:d:228483

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().