研究目的
To analyze the thermal and optical characteristics of a 16W LED using various aluminum heat sinks for effective thermal management and improved luminous output.
研究成果
The parallel fin heat sink with high surface area provides the best thermal management for the 16W LED, resulting in lower case and junction temperatures and higher luminous intensity. This design optimizes heat dissipation, enhancing LED efficiency and lifespan. Future work could explore active cooling techniques or alternative materials for further improvements.
研究不足
The study is limited to passive cooling techniques and specific aluminum heat sink designs; active cooling methods or other materials are not explored. The experiments are conducted under controlled ambient conditions, and real-world environmental factors may affect performance. The scope is restricted to a 16W LED module, and findings may not generalize to higher power LEDs or different configurations.
1：Experimental Design and Method Selection:
The study uses a passive cooling technique with various heat sink designs fabricated via wire electric discharge machining. The experimental setup includes a DC power supply, COB LED, data acquisition card, thermocouples, thermal imager, and lux meter to measure temperatures and luminous flux.
2：Sample Selection and Data Sources:
Four types of aluminum heat sinks (flat plate, cross fin, parallel fin 1, parallel fin 2) with specific dimensions are used. The LED module is Optoflash-OF-LM003-13B
3：List of Experimental Equipment and Materials:
5 Equipment includes DC power supply (DC 6002), thermal imager (CEM, IR lens), K-type thermocouple, data acquisition card, PC, digital lux meter, ultrasonic cleaner, and materials include Al-6063 alloy heat sinks, thermal grease (thermal conductivity 140 W/mK), and ethanol for cleaning.
4：Experimental Procedures and Operational Workflow:
Heat sinks are cleaned with distilled water and ethanol, then thermal grease is applied to fix the LED. Thermocouples are attached to measure case and ambient temperatures. The experiment is conducted at forward currents of 100mA, 200mA, and 300mA. Temperature and luminous flux readings are taken every 15 minutes until steady state is reached (approximately 1 hour).
5：Data Analysis Methods:
Data reduction involves calculating energy supplied, dissipative power, junction temperature, and thermal resistance using equations provided. Results are plotted and analyzed to compare thermal and optical performance across heat sinks.
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