燃料电池有轨电车冷却装置降噪设计及试验研究

Noise Reduction Design and Experimental Research of Cooling System of Fuel Cell Tram

以氢为能源进行发电的燃料电池动力系统,是具备清洁、高效、无污染等优点的清洁能源技术,是城市轨道交通的首选。冷却装置是保证燃料电池有轨电车正常工作的关键部件之一,高效冷却系统往往也带来噪声过大的问题,影响到有轨电车车内乘坐舒适度。针对有轨电车用燃料电池冷却系统车顶空间紧凑及散热量大、噪声低等设计要求,试验研究不同散热器翅片形式、冷却风机叶片形式及不同降噪材料铺贴方案下冷却装置的声学性能;通过对比试验结果,获得了较优冷却系统结构及降噪材料组合方案,降噪量达到2.9 d BA,在此基础上完成了燃料电池系统冷却装置的集成设计。样机测试结果表明,该型燃料电池冷却系统在高效散热的同时,达到了低噪声的设计要求。

For fuel cell power system using hydrogen energy in power generation, it is a clean energy technology with advantages of clean, efficient and pollution-free, and the first selection of urban rail transit. Cooling system is one of key component ensuring normal work of fuel cell tram. The high efficiency cooling system also brings about excessive noise problems which would affect the vehichle ride comfort. Aiming at the design requirements of fuel cell cooling system equipped on tram, which including the compact roof space, great heat rejection quantity and low noise, acoustic properties test of different heat radiator fin types are completed, cooling fan blade types and noise reduction materials of the cooling system. Through experimental results comparison and analysis, the optimal cooling system structure and the noise reduction material combination plan is obtained, the noise reduction quantity of which reached 2.9 dBA. On this basis, the integration design of fuel cell cooling system is completed. The test results show that this type of fuel cell cooling system achieved design requirements of the heat dissipation quantity and low noise.