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首页> 外文会议>Proceedings of the 12th international symposium on the science and technology of light sources and the 3rd international conference on white LEDs and solid state lighting >Efficiency improvement of ultra high pressure projector lamps by reflecting the unused UV radiation back into the lamp
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Efficiency improvement of ultra high pressure projector lamps by reflecting the unused UV radiation back into the lamp

机译：通过将未使用的紫外线辐射反射回灯来提高超高压投影灯的效率

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摘要

Visible region of the electromagnetic spectrum, generated by an extremely high pressure projector lamp, is used in the projection purpose. But a considerable amount of energy of the ultraviolet (UV) region is also generated and filtered out from the system. This work is devoted in an attempt to reuse this collectable UV light in enhancing visible lights and thus to improve lamp performance. A model is developed to account for the UV light of the 350—430 nm spectral band that is reflected back to the plasma of the light source to see its effects on the lamp properties. Simulations are carried out for a typical mercury lamp of 10 MPa operating pressure and of 1.4 A discharge current. Such a lamp usually operates horizontally by an alternating current but simplifications in the model are exercised neglecting natural convection. Ultimately, a 2D and axisymmetric assumptions for a direct current discharge are adapted. Radiation complexity and huge computational cost are avoided for the tradeoff in which fundamental UV effects are essentially retained. 10% of a 100 W lamp or 10 W is assumed to return to the lamp, of which 65% or 6.5 W is absorbed in the discharge. This reflected UV radiation is predicted to raise the plasma temperature and to increase the visible radiation by about 6%.
机译：由超高压投影灯产生的电磁频谱的可见区域用于投影。但是还会产生大量的紫外线（UV）区域能量，并从系统中滤除掉。这项工作致力于重新利用这种可收集的紫外线来增强可见光，从而提高灯的性能。开发了一个模型来说明350-430 nm光谱带的UV光，该UV光被反射回光源的等离子体，以查看其对灯性能的影响。针对工作压力为10 MPa，放电电流为1.4 A的典型水银灯进行了仿真。这种灯通常通过交流电水平工作，但是忽略自然对流却简化了模型。最终，对直流放电的二维和轴对称假设进行了调整。避免了辐射的复杂性和巨大的计算成本，从而基本保留了紫外线的影响。假定100 W灯中有10％或10 W返回到灯中，放电中吸收了其中的65％或6.5W。预计该反射的紫外线辐射会提高等离子体温度，并使可见光辐射增加约6％。

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