Waste heat recovery for the long haul

A WHR system based on an organic Rankine cycle has been developed for a longhaul Iveco Stralis truck.

The FPT Industrial range of engines currently achieves a brake thermal efficiency (BTE) of approximately 46%, which is higher than comparable engines on the market today. However, through a series of detailed updates and continuous innovation, the aim is to improve this well beyond 50% by 2020.

Alongside various technologies, waste heat recovered from exhaust by means of an Organic Rankine Cycle (ORC) will play a significant role to reach this ambitious target. Simulations suggest that by tapping multiple heat sources, up to 5% improvement in engine efficiency is possible. A simplified system harvesting heat from only EGR and exhaust gas will allow up to a 2.5% increase of BTE.