On the limiting factors of the waste heat recovery via ORC-based power units for on-the-road transportation sector

The engine considered was an IVECO F1C turbocharged diesel engine and the reference vehicle was a light duty one. Experimental data have been used for gas temperature and flow rates. The paper considers also the possible presence of an internal regeneration within the ORC which increases plant efficiency (reducing the dimensions of the HRVG and condenser) but introduces an additional heat exchanger. A correlation between weight of the heat exchangers and condenser frontal area as a function of the mechanical power recovered has been presented, without and with the regeneration stage.