Comparison of Advanced Waste Heat Recovery Systems with a Novel Oil Heating System

Abstract

Latest trends in waste heat recovery include systems like Thermo Electric Generation (TEG), Rankine cycle, and active warm up systems. The advantages and disadvantages of different approaches are critically discussed and compared with a novel and effective oil heating system that can deliver between 7% and 12% reductions of CO 2 emissions and fuel consumption. The comparison includes the expected CO 2 and fuel saving potential related to the legal drive cycle as well as real world driving, effects on regulated exhaust emissions, utilisation of resources, maintenance and service, vehicle performance, comfort, noise, and durability. KEY WORDS: Engine, waste heat recovery, lubrication system, heat transfer [A1] 2. COMPARISON 2.1 Rankine cycle The Rankine cycle is the standard process typically used in power plants to generate electricity from fluids with high temperatures, typically steam. It seems to be obvious to study this process as an option to also recover waste heat from cars. The cycle consists of four different main process changes, that all require a separate dedicated component: A pump increases the pressure of a liquid fluid so that the fluid starts to flow into a heat exchanger, in this case an exhaust gas heat exchanger,