Waste Heat Energy Harvesting for Improving Vehicle Efficiency

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

“…Another report includes the analysis of a more complex system that warms up the engine and the automatic transmission of a hybrid vehicle (21) . (11) which are also moderate compared to the TEG and Rankine systems. The system is also easier to package although it could be difficult to find the right space for vehicles with high performance engines.…”

“…The weight of the TEG system tested in (10) was 10 kg, it was hoped that the weight could be reduced down to 5kg without the need for intensive instrumentation in a production unit. Nevertheless , this is a very aggressive target compared to the 5.4 kg weight of a simple coolant exhaust gas heat exchanger (11) . (estimated for production) and 3.6 l (measured for a research prototype) (10) should be relatively easy to package.…”

“…The authors also performed physical tests with of the fuel economy. Chiew et al (11) cited this paper and mistakenly interpreted that a fuel economy improvement of 10.6 % was achieved for the NEDC test, started at 20 °C and 4.3 % after the warm up. However, the 10.6 % fuel consumption reduction that was reported in (16) In (17) a hybrid vehicle was tested with a similar exhaust gas heat exchanger but fuel economy improvements were also only reported for winter conditions.…”

“…Test results of such a system have been reported in (19) and (20) . The same heat exchanger as described in (11) was tested; it was connected to the engine oil system between the engine block and the oil filter by using a sandwich oil cooler adapter (figure 1). Fig.…”

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.…”