LED路燈熱流行為之研究

A Study on the Thermo-Fluidic Behavior of Light Emitting Diodes Used for Street Lighting

賴士博(Shih-Po Lai)

指導教授 ： 鄧治東

中原大學/工學院/機械工程學系/碩士(2009年)

https://doi.org/10.6840/cycu200900321

摘要

本研究之目的為利用數值模擬分析軟體建立LED路燈之各式模組，並進行可行性方案之評估，而後製樣並規劃相關實驗，並依模擬及實驗結果進行分析與討論。
本文所使用之LED路燈，其額定功率為100 W，並針對會影響LED junction的因素做討論，同時需有效降低路燈的整體體積及重量。依美國能源部針對固態照明(SSL)所公布之Energy Star@計劃及最新公佈的中華民國國家標準”發光二極體道路照明燈具”做為設計參考。戶外照明燈具操作壽命需達35,000小時的水準。本文利用模擬結果與實驗數據進行比較分析，並討論使用CFD軟體於熱流設計之可行性與可靠度。在本文中針對路燈外殼的架構進行設計，最終實驗結果符合溫度規範之需求。
本研究結果顯示，路燈模組的模擬結果與實驗值甚為吻合，兩者之間的誤差為9 %，並由實驗證明此外殼架構之設計，可達到路燈操作壽命三年、L70%的目標。故使用熱流模擬軟體可利用模擬軟體做初期評，可有效降低設計時間及製樣成品，並提高設計品質，實驗結果可用於未來LED其他相關產品及路燈散熱設計的參考依據。

關鍵字

ICEPAK ； SSL ； 數值模擬 ； LED路燈

並列摘要

The purpose of this study is to simulate a number of modules of LEDs (light-emitting diodes) by a numerical method and to evaluate the alternatives of modules. Subsequently, experiments and comparison of simulated results and experimental data will be done.
For this study, the street-lighting composed of the LEDs has a rated power of 100 W. Factors affecting the LED junctions and effective reduction of the total volume and weight for the street-lighting will be discussed. The design criterion for the street-lighting LEDs is based on the SSL (Solid-State Lighting) associated with the Energy Star@ Program issued by Department of Energy, United States of America, and the national standard on “Street-Lighting Light-Emitting Diodes” recently issued by the Republic of China. The life-span demanded by the outdoor lighting devices is required to be over 35,000 hours. This study compared the numerically simulated results with those obtained from experimental data and discussed the feasibility and reliability for the thermal design using Computation Fluid Dynamics (CFD) methodology – ICEPAK. In addition, this study dealt with the design of the configuration of the shell of the lighting device with the hope that the resulting temperature obtained would meet the required specifications demanded by the lighting devices.
Results obtained by this study indicated that good agreement was achieved by the computer simulated results and those obtained from the experimental data for the street-lighting modules used for this study; the difference between the two sets of results is within 9% using the experimental data as the bases for comparison. In addition, results obtained from the experiments indicated that the design of the configuration of the shell used for the lighting device met the goal of an operating life of three years with L70% for the street-lighting. It was demonstrated that preliminary evaluation could be done by using the thermo-fluidic simulation software package – ICEPAK. By doing so, reduction in time for design and for manufacturing prototype would be effectively done, with added benefit of improved quality of the design. Furthermore, the experimental results obtained in this study could be used for the bases for design references of future LED and other related street-lighting thermal management designs.

並列關鍵字

Solid-State Lighting (SSL) ； ICEPAK Software Package ； Light-Emitting Diode (LED) ； CFD

參考文獻

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