Economic and political demands are the driving factor for the technical development of the vehicle powertrain in the road-bound freight transport. In addition to the search for cost-efficient solutions, the focus of development is on reducing the consumption of fossil energy sources and the associated reduction in CO2 emissions as well as the reduction of combustion engine emissions. The conversion of waste heat into mechanical work or electrical energy with the help of an Organic Rankine Cycle (ORC) represents an effective measure for energy recovery for heavy-duty vehicles and is reported in the literature with potentials for fuel consumption improvement of up to 6.5% under laboratory conditions. Against this background, this thesis investigates a method for predicting exhaust enthalpy flows during transient driving of a commercial vehicle using route and environment information. Furthermore, the added value of the prediction method in combination with a dynamic control of an ORC system for electrical energy recovery is shown.In the first part of the thesis, the transient and stepped waste heat supply on a modern heavy-duty vehicle in characteristic driving profiles is measured and investigated. Based on the measurement results, the power recovery potentials for the low-temperature heat sources (water retarder, charge air cooler and cooling water radiator), as well as the high-temperature heat sources (exhaust gas aftertreatment and exhaust gas recirculation) are determined via an evaluation of the energy and exergy flows. With the averaged and loss-free power recovery from the high-temperature heat sources, on the order of 26.50 kW, the overall efficiency of the heavy-duty vehicle powertrain for operation in the characteristic driving profile could be increased from 42 % to about 50 %. The low-temperature heat sources, on the other hand, appear to have little added economic value due to the relatively low average exergy fluxes of only 2.93 kW.Based on the driving profile measurement data, the prediction method is developed. By evaluating the distance signal to a road user driving ahead, the speed trajectory of the heavy-duty vehicle is predicted using a Fourier analysis. In combination with a vehicle longitudinal dynamics model and a dynamic model of the combustion engine, it is shown that the prediction of exhaust gas temperatures and exhaust gas mass flows over a prediction horizon of 150 s is reasonably possible.In the final part of this work, the predictive method is examined simulatively for its added value using a model of an ORC system for electrical energy recovery (e-ORC). A preliminary pinch-point analysis based on vehicle measurement values is used to define the topology of the e-ORC system. The developed predictive control of the e-ORC system, which is applied in the characteristic driving profile, allows an average power recovery in the range of 3.48 kW. This corresponds to a reduction of the average fuel consumption of 0.415 l diesel per 100 km or an average fuel saving potential of 1.612 %.


    Zugriff

    Download

    Verfügbarkeit in meiner Bibliothek prüfen


    Exportieren, teilen und zitieren



    Titel :

    Prädiktive Regelung eines Organic-Rankine-Cycles zur Abwärmenutzung im transienten Fahrbetrieb eines schweren Nutzfahrzeuges : = Predictive control of an organic rankine cycle for waste heat recovery under transient driving conditions of a heavy-duty vehicle


    Weitere Titelangaben:

    Predictive control of an organic rankine cycle for waste heat recovery under transient driving conditions of a heavy-duty vehicle


    Beteiligte:
    Kreyer, Jörg Otto (Autor:in) / Pischinger, Stefan (Akademische:r Betreuer:in) / von der Aßen, Niklas Vincenz (Akademische:r Betreuer:in)

    Erscheinungsdatum :

    01.01.2023


    Format / Umfang :

    1 Online-Ressource : Illustrationen, Diagramme pages


    Anmerkungen:

    Dissertation, Rheinisch-Westfälische Technische Hochschule Aachen, 2023; Aachen 1 Online-Ressource : Illustrationen, Diagramme (2023). = Dissertation, Rheinisch-Westfälische Technische Hochschule Aachen, 2023



    Medientyp :

    Sonstige


    Format :

    Elektronische Ressource


    Sprache :

    Deutsch




    Waste Heat Recovery by an Organic Rankine Cycle for Heavy Duty Vehicles

    Perosino, Andrea / Di Battista, Davide / Bettoja, Federica et al. | SAE Technical Papers | 2016


    Waste Heat Recovery by an Organic Rankine Cycle for Heavy Duty Vehicles

    Cipollone, Roberto / Di Battista, Davide / Perosino, Andrea et al. | British Library Conference Proceedings | 2016



    Niedertemperatur-Abwärmenutzung mittels Organic-Rankine-Cycle im mobilen Einsatz

    Körner, Jan Erik | GWLB - Gottfried Wilhelm Leibniz Bibliothek | 2013