Use of Exhaust Gas Energy in Heavy Trucks Using the Rankine Process

Lutz, Rainer; Geskes, Peter; Pantow, Eberhard; Eitel, Jochen

doi:10.1007/s38313-012-0224-4

Cited by 6 publications

(4 citation statements)

References 1 publication

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“…The engine exhaust gases provide heat needed to vaporize the ethanol. Among organic fluids, several authors [18], [19] consider ethanol as a promising fluid due to its great features in energy recovery aspect in the temperature range of a vehicle application (450 °C -°C). Ethanol has been taken into account for its environmental (low GWP and ODP), thermo-physical properties (high expansion ratios, condensation temperatures at atmospheric pressure and low freezing point) and cost features.…”

mentioning

confidence: 99%

Advanced exergy analysis for a bottoming organic rankine cycle coupled to an internal combustion engine

Galindo

Ruíz

Dolz

et al. 2016

Energy Conversion and Management

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This paper deals with the evaluation and analysis of a bottoming ORC cycle coupled to an IC engine by means of conventional and advanced exergy analysis. Using experimental data of an ORC coupled to a 2 l turbocharged engine, both conventional and advanced exergy analysis are carried out. Splitting the exergy in the advanced exergy analysis into unavoidable and avoidable provides a measure of the potential of improving the efficiency of this component. On the other hand, splitting the exergy into endogenous and exogenous provides information between interactions among system components. The result of this study shows that there is a high potential of improvement in this type of cycles. Although, from the conventional analysis, the exergy destruction rate of boiler is greater than the one of the expander, condenser and pump, the advanced exergy analysis suggests that the first priority of improvement should be given to the expander, followed by the pump, the condenser and the boiler. A total amount of 3.75 kW (36.5%) of exergy destruction rate could be lowered, taking account that only the avoidable part of the exergy destruction rate can be reduced.

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mentioning

confidence: 99%

Advanced exergy analysis for a bottoming organic rankine cycle coupled to an internal combustion engine

Galindo

Ruíz

Dolz

et al. 2016

Energy Conversion and Management

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“…Preheating processes are mostly coupled with air-conditioning systems of the passenger cabin [27][28][29]. Recovered mechanical energy could be coupled directly into the engine's crankshaft, used to run compressors for charging purposes, or used to run generators for production of electrical energy [12,16,[19][20][21][22]. As storable types of energy, either heat [30] or electrical energy is taken into account [23].…”

Section: Characteristics Of Internal Combustion Enginesmentioning

confidence: 99%

“…The first attempts to establish waste heat recovery in the automotive sector have been made in the area of heavy-duty trucks, as they operate mostly at steady-state conditions [16]. However, efforts have also now been made to adapt heat recovery technologies to slightly more flexible operating conditions [17].…”

Section: Introductionmentioning

confidence: 99%

Assessment of Waste Heat Recovery Options in Passenger Car Applications by Various Rankine Cycles

Heidrich

Krisch

2014

Heat Transfer Engineering

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In power plant applications it is state of the art to recover waste heat in combined-cycle power plants. Hence, overall efficiencies are increased from 35% to more than 45%. Actually, in marine applications as well as in commercial vehicle applications, similar technologies are developed to recover waste heat. The common basis of all these applications is running only or mostly at steady-state conditions. With passenger cars the operation conditions are completely different, as passenger cars are operated under highly transient conditions. In the work presented, the characteristics of a passenger car-based internal combustion engine are analyzed. From exhaust gas temperatures and exhaust gas mass flows, the characteristic of available waste heat over load and speed is estimated. Based on this characteristic an ideal, a water-based Rankine cycle is designed and compared with different organic Rankine cycles. Finally, the expected waste heat recovery at typical passenger car operation conditions is determined by weighting the waste heat recovery characteristics with the operation conditions of the new European driving cycle (NEDC). Based on NEDC scenario, only about 0.2 kW of power could be recovered. By moving toward range extender conditions, between 2.5 and 4.0 kW would be recoverable.

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“…According to several authors, a 5% fuel economy [22] is achievable when using ethanol as working fluid on such vehicles improving both the expander machine and the evaporator efficiency. This improvement will save approximately 2700 € per year in each truck, avoiding 6 tons of CO2 emitted to the atmosphere [5].…”

Section: Introductionmentioning

confidence: 99%

Dynamic tests and adaptive control of a bottoming organic Rankine cycle of IC engine using swash-plate expander

Torregrosa

Galindo

Dolz

et al. 2016

Energy Conversion and Management

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This paper deals with the experimental testing of a bottoming Organic Rankine Cycle (ORC) integrate in a 2 liter turbocharged gasoline engine using ethanol as working fluid. The main components of the cycle are a boiler, a condenser, a pump and a swash-plate expander. Both steady and transient tests were performed in three engine operating points to understand the behavior and inertia of the system. Pressure-Volume diagram during these transients were presented and analyzed. Operating parameters of the expander, such as expander speed and boiler power, were shifted. The objective of these tests is to understand the inertia of the system and to have a robust control in all the possible transient tests.New European Driving Cycle was tested with and without the expander because

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Use of Exhaust Gas Energy in Heavy Trucks Using the Rankine Process

Cited by 6 publications

References 1 publication

Advanced exergy analysis for a bottoming organic rankine cycle coupled to an internal combustion engine

Advanced exergy analysis for a bottoming organic rankine cycle coupled to an internal combustion engine

Assessment of Waste Heat Recovery Options in Passenger Car Applications by Various Rankine Cycles

Dynamic tests and adaptive control of a bottoming organic Rankine cycle of IC engine using swash-plate expander

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