详情

原文传递 HERO OF ZERO

题名：	HERO OF ZERO
正文语种：	eng
作者：	Richard Simpson
摘要：	Diesel-powered truck refrigeration units first found themselves cast as the villains of urban air quality from around 2014 when the Dearman Engine Company launched itself on the cold-chain market in a flurry of publicity. Rather than turning heat into kinetic energy by expanding combustion gas as a conventional engine does, the Dearman motor used the expansion of very low-temperature liquid nitrogen into gas instead. And it was particularly suited to the cold chain market because its exhaust gas was not only non-toxic, but also very cold. This additional cold could be harnessed as additional refrigeration, and would compensate for the relatively paltry torque output of the engine itself. Part of the Dearman business strategy was to focus on the emissions produced by the then-current diesel fridge engines, although some of the negative claims made were questionable (for instance they appeared to ignore both the cyclical nature of the diesel motor's operation, with the engine typically running for only 15% of the time, and the tightening regulation of exhaust emissions from such engines). This approach won it glowing coverage from media outlets including the BBC and The Guardian newspaper.
出版年：	2022
期刊名称：	Transport engineer
期：	Nov.
页码：	33,35