HEV waste heat recovery system

SunAmp设计、开发和制造基于相变材料(PCM)的热能存储设备，可以储存热量和冷却多天。我们称这些设备为热电池。五年多来，它们已经成功地部署在住宅和商业住房计划中，现在正被用于解决车辆的热管理挑战。电池电动(BEV)和混合动力电动汽车(HEV-在电动模式下)范围包括在寒冷的条件下，高达50%的温度低至-30°C。典型的同类最好的混合动力汽车(轿车和货车)只能实现29-35英里(NEDC)，冬季将显著影响该范围。这样做将扩大续航里程，但在这种模式下也会减少排放，因为内燃机发动机关闭，机舱加热只由高压电池供电，很快就会耗尽有限的储存能量。当这种情况发生时，内燃机发动机已经冷却到停止启动阈值以下，内燃机发动机重新启动，在缓慢升温时产生排放峰值。发动机越快回到最佳温度，排放越少，这一点在2017年和2019年完成的两个由NVN资助的项目中得到了证明。这两个项目都表明，我们可以显著减少混合动力双层巴士的冷启动排放(约50%)，并在伦敦交通部低排放巴士测试周期内保持发动机温度和座舱供暖。在这项可行性研究中，我们将通过从发动机废气中捕获高品位的热量来研究这一改进。Sunamp已与领先的汽车工程咨询公司IAV合作，以稳定这一应用所需的高温PCM；模拟在车辆座舱加热系统中添加热电池子系统的影响；设计一个可在未来研发计划中使用的概念，并开发商业模式，以最好地最大化市场机会。

Sunamp designs, develops and manufactures phase change material (PCM) based thermal energy storage devices that can store heat and coolth for many days. We call these devices heat batteries. They have been successfully deployed on residential and commercial housing schemes for more than five years and are now being used to address thermal management challenges on vehicles. Battery electric (BEV) and hybrid electric vehicle (HEV - in electric mode) range is comprised in cold conditions, up to 50% in temperatures down to -30ºC. Typical best in class HEVs (cars and vans) only achieve between 29-35 miles (NEDC), winter will significantly impact that range.This application looks at the challenge of maintaining HEV cabin heating when the engine is off. Doing so will extend range but also reduce emissions in this mode, as the IC engine is off, and the cabin heating is only powered by the HV battery, quickly depleting the limited stored energy. When this happens and the IC engine has cooled off below the stop start threshold, the IC engine restarts, giving an emissions spike as it slowly warms up. The emissions are less the quicker the engine gets back to optimal temperature, and this was proven in two NVN funded projects completed in 2017 and 2019\. Both these projects showed that we could significantly reduce hybrid electric double decker bus cold start emissions (around 50%) and maintain engine temperature and cabin heating throughout the TfL low emission bus test cycle. Waste heat was captured from the engine coolant, in this feasibility study we will investigate the improvement by capturing high grade heat from the engine exhaust gas stream.Sunamp has teamed up with IAV, a leading automotive engineering consultancy, to stabilise the high temperature PCM needed for this application; simulate the impact of adding heat battery sub system into the vehicle cabin heating system; designing a concept that could feature in a future R&D programmes and develop the business model to best maximise the market opportunity.