204 0

Thermal performance improvement of a radial heat sink with a hollow cylinder for LED downlight applications

Title
Thermal performance improvement of a radial heat sink with a hollow cylinder for LED downlight applications
Author
이관수
Keywords
LED cooling; Radial heat sink; Hollow cylinder; Natural convection
Issue Date
2015-10
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Citation
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, v. 89, Page. 1184-1189
Abstract
A cooling system consisting of a hollow cylinder and a radial heat sink that can be applied to a light-emitting diode (LED) downlight is suggested. Natural convection heat transfer is simulated via a numerical model and validated experimentally. The airflow pattern around the radial heat sink is similar to that of a chimney, entering from the side of the heat sink and moving upward. When the hollow cylinder is installed, the mass flow rate of air to the heat sink fins increases, which results in enhanced thermal performance of the heat sink. The effect of the size, set up height and material of the hollow cylinder is analyzed, and the performance of heat sinks with various fin-types is calculated. The results show that the thermal performance of a radial heat sink is enhanced by up to 43% following installation of a hollow cylinder. (C) 2015 Elsevier Ltd. All rights reserved.
URI
http://www.sciencedirect.com/science/article/pii/S0017931015006596http://hdl.handle.net/20.500.11754/28301
ISSN
0017-9310; 1879-2189
DOI
10.1016/j.ijheatmasstransfer.2015.06.037
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MECHANICAL ENGINEERING(기계공학부) > Articles
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE