Development of Pin Trapezium Hybrid Fins Heat Sink LED Bulb

摘要

The power sector in Nigeria and other developing countries is under severe stress because of generation supply deficits and high fuel costs. The electricity supply-demand gap in most developing countries is increasing rapidly as a result of the fast growing demand for electricity to meet economic growth, increasing urbanization, generation capacity deficits, high costs of new generation capacity, and fuel supply issues. From a menu of demand-side energy-efficiency measures, energy-efficient lighting technologies offer one of the most promising solutions to help bridge the supply-demand gap in many developing countries. The incandescent lamps have been found to consume much energy compared to fluorescence bulbs. Recently attention has shifted to Light Emitting Diodes (LED) for their advantage of using small electrical energy to deliver luminous lights. As enormous as the advantages of LED bulbs are over the incandescent bulbs and Compact fluorescence bulbs, the problem of heat dissipation in LED's drastically reduce their efficiency and in some cases damage the bulb before one quarter of their expected life. One factor that makes it easy or difficult for generated heat to disperse from the source of generation is the temperature of the surrounding air and adjacent materials to the heat source. Nigeria lies in the equatorial zone registering high temperatures throughout the year. Many imported LED bulbs have been found to fail, shortly after installation. A number of reasons have been adduced for such failures but the fact is that the foreign manufacturers have not taken cognizance of Nigerian peculiar conditions in the design and production of the LEDs heat sinks. The survival of LED bulbs in Nigeria would largely depend on how well heat dissipation in Nigerian customized bulbs is designed and produced. This invention addresses this problem by ensuring large surface areas for convective heat transfer away from the chip junction, through the installation of a hybrid pin and trapezium fin aluminum heat sink.