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5­4 ORC in vehicles Exhaust gas and coolants of vehicles can be used to generate power by ORC. For normal cars in cruising speed this will produce 10% more power and can be used to recharge batteries of a hybrid car and improve its overall efficiency. In light duty cars depending on type this can cause between 5‐30% reductions in fuel consumption. BMW, Honda and Researchers at Loughborough University and the University of Sussex, UK are examples of researchers in this field. 30 “Their test results were presented in 2008. It shows that 62 miles/h speed of driving; using ORC will improved the thermal efficiency of the engine by 3.8%”. (greencarcongress, 2009). As depicted in Figure 16, ORC unit with evaporator, expander, condenser, and pumps are used to produce extra amount of power in cars. Evaporator gains heat from waste heat of engine while the condenser is connected to its radiator. Expander and generator will produce electricity. Then the power is stored in batteries. This will help the engine to work in more efficient ways by using extra amount of produced power. Figure 16: ORC in vehicles Source: motorauthority (2010)31. Opcon in Sweden is also installing ORC boxes using Lysholm turbine on ships. It is claimed that it will cause fuel saving of about 4‐6%. Shipping accounts for 5% C02 emission and produces MWs of power which a fraction is deemed waste. 32 30 Greencarcongress; available at: http://www.greencarcongress.com/2009/05/bmw‐rankine‐20090503.htm; as accessed: 01.10.2010. 31 Motorauthority; available at: http://www.motorauthority.com/image/100216031_honda‐investigating‐039rankine‐ cycle039‐to‐power‐hybrids ;as accessed: 29.09.2010. 32 J. Ringler, M. Seifert, V. Guyotot and W. Hübner. (2009) Rankine Cycle for Waste Heat Recovery of IC Engines (SAE 2009‐ 01‐0174) 36

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