Optimization Design Of LED Street Light Heat Dispersion Based On QFD And ANSYS

Since entering the 21 st century, LED obviously improves the urban living environment,and it also promotes the rapid development of urban construction level. It is becoming an increasingly important part of our every day lives. LED industry is recognized as the strong vitality of the emerging industries. "Green lighting project" is the important measures to realize energy conservation and emissions reduction in China. At the same time the project promotes the innovation of LED lighting technology. Nowadays, LED is widely used at lighting realm. The LED market has great development potential and space. So, it is of great importance to study the heat dissipating performance of LED illumination.Taking LED street lamps as the main study subject, firstly, this paper introduces the principle and structure of LED lights, and then introduces the related theory of the QFD(Quality Function Deployment, QFD) and ANSYS. Customer demands of LED Street light were obtained through the investigation, and the affinity figure and hierarchy structure of the customer demands were obtained through sorting. This paper respectively uses AHP and Fuzzy AHP to get the weight of customer demand and its corresponding customer satisfaction assessment. Good heat dissipating capacity is determined to be the key customer requirements based on satisfaction assessment. This paper uses the related data of LED street lamp customer requirements to evaluate the market competitiveness of LED lights and to unwind LED street lamp technology characteristics. And use QFD software to establish the quality houses of product planning. The optimal scheme is the optimal design of the LED Street light on the cooling performance based on the quality houses, so as to satisfy the key customer requirement, good heat dissipation performance.Meanwhile, the 30 W LED Street lamp is regarded as the research object. Through the analysis of the heat dissipation mechanism of the radiator, aiming at the substrate thickness,fin thickness, fin height, fin spacing of the radiator, the article uses the ANSYS software to analyses how the basic factor affects the heat dissipation performance of LED Street light.Taking into account the four factors at the same time, the experiment was designed according to four factors and three levels orthogonal table. By analyzing the experimental results, get the size of radiator structure of the LED Street lamp. The size of substrate thickness is 13 mm.The size of fin thickness is 8 mm. The size of fin height 80 is mm. The size of fin spacing is18 mm. Simulation results based on ANSYS show that the structure of the radiator of the30 W LED Street light has the best thermal performance. The size of radiator structure of the120 W LED Street lamp is obtained through the modulation design. Simulation results based on ANSYS show that the structure of the radiator of the 120 W LED Street lamp has the bestthermal performance. The research results in this paper explore the effective way in how to solve the problem of the heat dissipation design of the LED Street lamp.