Evaporative cooling systems for electrified powertrain components

电气化动力总成部件蒸发冷却系统：该项目将满足对轻质/低成本热管理系统的需求，该系统可与包括驱动/牵引电机在内的风冷部件一起使用，以取代包括电动飞机在内的质量敏感应用中对笨重液体冷却系统的需求。高功率密度电动马达现在得到广泛使用，随着社会转向低碳运输，对电气化动力总成的需求将会增加，高体积功率密度使被动空气冷却系统的使用变得更具挑战性。通常情况下，动力总成的安装要么施加一个使用高功率设置的短持续时间限制，要么使用液体冷却体系结构来管理机器的温度。这两种解决方案都不适合需要长时间大功率的质量敏感型应用，但大多数时间都是在许多动力系统典型的中等功率水平下度过的。在这个项目中，将研究和开发蒸发冷却系统的使用，重点是轻型飞机的电力传动系统中的电机；当仅有气流不足时，该系统将在电机运行的高需求时段充当另一种冷却形式。在已知的电机热点上使用定向喷雾的蒸发冷却系统将提供一种定向散热方法，它提供了一种比传统闭环系统更轻、更紧凑的替代方案。总之，该项目旨在开发一种方法来满足电机的冷却需求，这种方法提供液体冷却的高散热能力，同时具有空气冷却系统的简单性和重量优势。

Evaporative cooling systems for electrified powertrain components: This project will address the need for a lightweight/low-cost thermal management system that can be used alongside air-cooled components including drive/traction motors to replace the requirement for bulky liquid cooling systems in mass-sensitive applications including electric aircraft.High power density electric motors now are widespread in use and the demand for electrified powertrains is set to increase as society shifts towards low carbon transport, high volumetric power densities have made using passive air cooling systems more challenging. Typically, powertrain installations either impose a short duration limit where high power settings can be utilised or use a liquid-cooling architecture to manage the machine's temperature. Neither of these solutions is desirable in mass-sensitive applications where prolonged periods of high power are required, but the majority of the time is spent at more moderate power levels typical of many powertrains.In this project, the use of an evaporative cooling system will be investigated and developed, focusing on the motor in a light aircraft's electric powertrain; the system will act as an additional form of cooling in high-demand periods of motor operation when the airflow alone is insufficient. Using an evaporative cooling system with directed spray onto known motor hotspots will provide a targeted heat rejection method that provides a lighter and more compact alternative to a conventional closed-loop coolant system.In summary, the project aims to develop an approach to address the cooling needs of electrical machines that provide the high heat rejection of liquid-based cooling with the simplicity and weight advantages of an air-based system.