城市轨道交通的振动和噪声及其控制的研究

地铁、轻轨等城市轨道交通会给市民和旅客带来便捷 ,同时也会给沿线的居民和建筑物带来振动及噪声等环境污染的公害。笔者分析了振动和噪声的控制与评价标准和预测方法 ,针对城市轨道交通的振动和噪声的特点和传播规律 ,从声源的控制、振动传播与声传播控制以及承受物控制 3个方面 ,提出了相应的控制措施和途径     

安全工程的大实践──铁路行车安全车机联控与劳动安全站区联控

叙述了广州铁路集团公司行车安全车机联控与劳动安全站区联控的基本做法和主要经验，提出了发展和完善“双联控”，使之成为铁路运输管理的一项基本制度和管理模式需要解决的问题。     

Performance and emission characteristic studies on CRDI diesel engine fuelled with plastic pyrolysis oil blended with ethanol and diesel

ABSTRACT

This paper mainly focuses on the utilisation of plastic pyrolysis oil (PPO) and its’ blends with diesel and ethanol in different proportions in a modified diesel engine fitted with common rail direct injection (CRDI) facility. PPO was subsequently blended with diesel and ethanol and characterisation has been done. Experiments were conducted to investigate the impact of injection timing (IT) and injection pressure (IP) on the performance of modified CRDI engine fuelled with PPO and its blends with diesel and ethanol. From the experimental investigations, IT of 10°bTDC and IP of 900 bar were found as best operating parameters to obtain maximum brake thermal efficiency (BTE) with lowered emissions for the fuel combinations utilised in the investigations. PPO as substitute to diesel fuel could be viable if its major concern is to finding permanent resources.