Thermal performance of loop heat pipes with smooth and rough porous copper fiber sintered sheets

Ling, Weisong, Zhou, Wei, Yu, Wei, Liu, Ruiliang and Hui, K. S. ORCID: https://orcid.org/0000-0001-7089-7587 (2017) Thermal performance of loop heat pipes with smooth and rough porous copper fiber sintered sheets. Energy Conversion and Management, 153. pp. 323-334. ISSN 0196-8904

[thumbnail of Accepted manuscript]
Preview
PDF (Accepted manuscript) - Accepted Version
Available under License Creative Commons Attribution Non-commercial No Derivatives.

Download (1MB) | Preview

Abstract

Smooth and rough porous copper fiber sintered sheets, employed here as wicks for loop heat pipes for the first time, were fabricated using a low-temperature solid-phase sintering method. The capillary performance of these porous copper fiber sintered sheets were analyzed and discussed. The influence of the surface morphology, filling ratio, and working fluid on the thermal resistance, evaporator wall temperature, and start-up time of the loop heat pipes were investigated. The results showed that the capillary pumping amount of working fluid for both smooth and rough porous copper fiber sintered sheets initially increases rapidly, and then gradually attains a stable state. The curve of the capillary pumping amount of working fluid can be described as a function that increases exponentially over time. When rough porous copper fiber sintered sheets are used as wicks and deionized water is used as the working fluid, the capillary pumping amount is maximized. Compared to smooth porous copper fiber sintered sheets, loop heat pipes with rough porous copper fiber sintered sheets exhibit a shorter start-up time, lower thermal resistance, and lower evaporator wall temperature. For a filling ratio in the range of 15–45%, loop heat pipes with rough porous copper fiber sintered sheets and a 30% filling ratio show lower thermal resistance and a lower evaporator wall temperature. Ultimately, the use of deionized water as the working fluid with a 30% filling ratio enables loop heat pipes with rough porous copper fiber sintered sheets to be stably operated at a heat load of 200 W.

Item Type: Article
Uncontrolled Keywords: loop heat pipe,porous copper fiber sintered sheet,surface morphology,capillary pumping amount,thermal performance
Faculty \ School: Faculty of Science > School of Mathematics
UEA Research Groups: Faculty of Science > Research Groups > Energy Materials Laboratory
Related URLs:
Depositing User: Pure Connector
Date Deposited: 12 Jan 2018 10:30
Last Modified: 29 Sep 2023 10:30
URI: https://ueaeprints.uea.ac.uk/id/eprint/65915
DOI: 10.1016/j.enconman.2017.10.009

Actions (login required)

View Item View Item