Review of Rankine Cycle Systems Components for Hybrid Engines Waste Heat Recovery

Improving the environmental performance of heavy-duty vehicles and engines: particular technologies

“…10.26). This technology has been extensively investigated since the early 1970s and covered in literature (DiBella et al, 1983;Diehl et al, 2001;Crane et al, 2001;Chammas and Clodic, 2005;Stobart and Weerasinghe, 2006;Arias et al, 2006;Teng et al, 2006Teng et al, , 2007aTeng et al, , 2007bKruiswyk, 2008;Nelson, 2009;Ringler et al, 2009;Teng, 2010;Edwards et al, 2010Edwards et al, , 2012Hirschbichler, 2010;Briggs et al, 2010Briggs et al, , 2012Chiew et al, 2011;Arunachalam et al, 2012;Latz et al, 2012;Lopes et al, 2012). It can be applied to EGR heat rejection, charge air heat rejection, turbine outlet exhaust heat, and even engine coolant heat rejection.…”

A review of waste heat recovery and Organic Rankine Cycles (ORC) in on-off highway vehicle Heavy Duty Diesel Engine applications

“…coolant, or in condensers using water as condensing medium) or in smaller applications due to their compactness [10]. Plate heat exchanger can withstand lower temperatures (around 250°C) compared to shell-andtubes designs, because of plates deformations and gaskets-sealing problems [121], even though higher temperature suitable devices are under development. Metal foam heat exchangers [122] are also under study and can be used in vehicle waste heat recovery applications due to their compactness and enhanced heat transfer capabilities.…”

“…Metal foam heat exchangers [122] are also under study and can be used in vehicle waste heat recovery applications due to their compactness and enhanced heat transfer capabilities. Nevertheless, they result in being very expensive at the actual state of the art [121], and they lead to very high pressure drops on the engine exhaust gas side, with consequent increase in engine backpressure and decrease in performance [123].…”

“…Little lubrication requirements as well as low level noise are other advantages. Leakage losses is a possible drawback, together with high pressure drops [121], due to the difficulty of vanes to maintain a good contact with the housing. The rotational speed is strongly affected by the pressure and flow rate of working fluid.…”

Whole-vehicle modelling of exhaust energy recovery on a diesel-electric hybrid bus

“…Lopes et al [4] provided an overview of the Organic Rankine Cycle (ORC) systems, and showed the possibilities of using the concept to recover waste heat, and Srinivasan et al [5] tested an ORC on a diesel engine showing benefits to fuel efficiency and a reduction in emissions. However, whilst these papers prove it is possible to recover significant amounts of waste energy, the complexity of the system, along with the amount of equipment required to make the concept work, is considerable.…”