HEV waste heat recovery system

Sunamp设计、开发和制造基于相变材料（PCM）的热能储存装置，可以储存热量和冷却许多天。我们称这些装置为热电池。他们已经成功地在住宅和商业住宅计划中部署了五年多，现在被用于解决车辆的热管理挑战。纯电动汽车（BEV）和混合动力汽车（HEV - in electric mode）的续航里程由寒冷条件组成，高达50%的续航里程在零下30摄氏度的温度下行驶。典型的最佳混合动力汽车（轿车和货车）只能达到29-35英里（NEDC），冬季将显著影响这一范围。该应用程序着眼于在发动机关闭时保持HEV机舱加热的挑战。在这种模式下，这样做不仅可以延长行驶里程，还可以减少排放，因为IC发动机是关闭的，并且机舱加热仅由高压电池供电，迅速耗尽有限的储存能量。当这种情况发生，并且IC发动机已经冷却到停止启动阈值以下时，IC发动机重新启动，在缓慢升温时产生排放峰值。发动机恢复到最佳温度的速度越快，排放就越少，这在2017年和2019年完成的两个NVN资助的项目中得到了证明。这两个项目都表明，我们可以显著降低混合动力双层巴士冷启动排放（约50%），并在整个TfL低排放巴士测试周期内保持发动机温度和机舱加热。废热是从发动机冷却液中捕获的，在这个可行性研究中，我们将研究通过从发动机废气流中捕获高品位热量的改进。Sunamp与领先的汽车工程咨询公司IAV合作，稳定该应用所需的高温PCM；模拟在汽车舱室加热系统中加入热电池子系统的影响；设计一个概念，可以在未来的研发项目中发挥作用，并开发商业模式，以最大限度地利用市场机会。

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.