Library Subscription: Guest
Home Archives Officers Future meetings American Society of Thermal and Fluids Engineering
Second Thermal and Fluids Engineering  Conference

ISSN: 2379-1748
ISBN: 978-1-56700-430-4

DESIGN AND FABRICATION OF THE PIEZOELECTRIC ACTUATED AIR FORCED CONVECTION THERMAL MANAGEMENT AND APPLICATION TO HIGH POWER LED COOLING

Chiang-Ho Cheng
Da-Yeh University, 168 University Rd., Dacun, Changhua, 51591, Taiwan

An-Shik Yang
Department of Energy and Refrigerating Air-Conditioning Engineering, National Taipei University of Technology, Taipei 10608, Taiwan

Ming-Yu Lai
Da-Yeh University, 168 University Rd., Dacun, Changhua, 51591, Taiwan

Abstract

LED is made of semiconductor material as the light emitting devices. It has the advantage of the electricity saving, environmental protection, small size, quick to response. However, they are existing a low luminous efficiency and high thermal dissipation needed. To increase LED power, the chip will also generate a large amount of heat. It not only causes low luminous performance but also results in LED's chip failure. In order to prevent those catastrophe incidents, the thermal management becomes a crucial solution process to attain engineering designs. The main objective of this paper is to develop LED with the active-cooling technique, which can provide the cooling measures for high power LED to deal with the problem of heat dissipation in a high temperature environment. This study uses a novel piezoelectric actuated gas micropump with check-valves as an active-cooling component integrating the heat sink to form a thermal management system. The aim of using this system is to transfer the heat from high power LED to the environment. This air micropump is designed to pump gases using the piezoelectric actuator as a driving source. In operations, the stroke volume of the membrane and the compression ratio can be maximized via minimizing the dead volume of the chamber of the micropump. The performance of air micropump is greatly affected by the thicknesses of check valves, volumes of chamber, and voltage/frequency of power supply applied to piezoelectric material. The delivered flow rate and cooling efficiency for LED of the air micropump are discussed in the paper.

Purchase $20.00 Check subscription Publication Ethics and Malpractice Recommend to my Librarian Bookmark this Page