The Experts below are selected from a list of 318 Experts worldwide ranked by ideXlab platform

T. C. Zannis - One of the best experts on this subject based on the ideXlab platform.

  • simulation of a heavy duty diesel engine with electrical turbocompounding system using operating charts for turbocharger components and Power Turbine
    Energy Conversion and Management, 2013
    Co-Authors: Christos Katsanos, Dimitrios T. Hountalas, T. C. Zannis
    Abstract:

    Abstract In diesel engines, approximately 30–40% of the energy supplied by the fuel is rejected to the ambience through exhaust gases. Therefore, there is a potentiality for further considerable increase of diesel engine efficiency with the utilization of exhaust gas heat and its conversion to mechanical or electrical energy. In the present study, the operational behavior of a heavy-duty (HD) diesel truck engine equipped with an electric turbocompounding system is examined on a theoretical basis. The electrical turbocompounding configuration comprised of a Power Turbine coupled to an electric generator, which is installed downstream to the turbocharger (T/C) Turbine. A diesel engine simulation model has been developed using operating charts for both turbocharger and Power Turbine. A method for introducing the operating charts into the engine model is described thoroughly. A parametric analysis is conducted with the developed simulation tool, where the varying parameter is the rotational speed of Power Turbine shaft. In this study, the interaction between the Power Turbine and the turbocharged diesel engine is examined in detail. The effect of Power Turbine speed on T/C components efficiencies, Power Turbine efficiency, exhaust pressure and temperature, engine boost pressure and air to fuel ratio is evaluated. In addition, theoretical results for the potential impact of electrical turbocompounding on the generated electric Power, net engine Power and relative improvement of brake specific fuel consumption (bsfc) are provided. The critical evaluation of the theoretical findings led to the basic conclusion that there is a significant potential for bsfc improvement of HD diesel truck engines with the proposed electrical turbocompounding concept, which reaches up to 4% at full engine load. The improvement of bsfc with electric turbocompounding appears to be more attractive solution in terms of technical complexity and installation cost against other competitive heat recovery technologies such as Rankine cycle systems.

  • Simulation of a heavy-duty diesel engine with electrical turbocompounding system using operating charts for turbocharger components and Power Turbine
    Energy Conversion and Management, 2013
    Co-Authors: Christos Katsanos, Dimitrios T. Hountalas, T. C. Zannis
    Abstract:

    In diesel engines, approximately 30-40% of the energy supplied by the fuel is rejected to the ambience through exhaust gases. Therefore, there is a potentiality for further considerable increase of diesel engine efficiency with the utilization of exhaust gas heat and its conversion to mechanical or electrical energy. In the present study, the operational behavior of a heavy-duty (HD) diesel truck engine equipped with an electric turbocompounding system is examined on a theoretical basis. The electrical turbocompounding configuration comprised of a Power Turbine coupled to an electric generator, which is installed downstream to the turbocharger (T/C) Turbine. A diesel engine simulation model has been developed using operating charts for both turbocharger and Power Turbine. A method for introducing the operating charts into the engine model is described thoroughly. A parametric analysis is conducted with the developed simulation tool, where the varying parameter is the rotational speed of Power Turbine shaft. In this study, the interaction between the Power Turbine and the turbocharged diesel engine is examined in detail. The effect of Power Turbine speed on T/C components efficiencies, Power Turbine efficiency, exhaust pressure and temperature, engine boost pressure and air to fuel ratio is evaluated. In addition, theoretical results for the potential impact of electrical turbocompounding on the generated electric Power, net engine Power and relative improvement of brake specific fuel consumption (bsfc) are provided. The critical evaluation of the theoretical findings led to the basic conclusion that there is a significant potential for bsfc improvement of HD diesel truck engines with the proposed electrical turbocompounding concept, which reaches up to 4% at full engine load. The improvement of bsfc with electric turbocompounding appears to be more attractive solution in terms of technical complexity and installation cost against other competitive heat recovery technologies such as Rankine cycle systems. © 2013 Elsevier Ltd. All rights reserved.

Y Dong - One of the best experts on this subject based on the ideXlab platform.

  • Conceptual design and performance analysis of waste heat recovery system for intelligent marine diesel engines. part 2: Integrating Power Turbine into WHR systems
    International Journal of Heat and Technology, 2012
    Co-Authors: M Zheshu, Y Dong
    Abstract:

    Intelligent Marine Diesel Engines have been state of the art main engines employed by value-added new ship including large container vessel. For intelligent marine diesel engines, it is clear that the very low exhaust gas temperature after the turbocharger has led the impracticable installation of traditional WHR systems-ordinary Rankine Cycle (RC) conceptional waste heat recovery system and Organic Rankine Cycle (ORC) conceptional waste heat recovery system-onboard. To deal with Ulis dilemma, the way out is obtained from the increased exhaust gas temperature by integrating Power Turbine into WHR systems. Therefore, Thermo Efficiency System (TES system proposed by MAN B&W), TES-Organic Rankine Cycle (ORC) system and TES-Screw Expander Generator (SEG) system have been developed to improve such vessels energy efficiency. In mis paper, thermodynamic models for TES, TES-ORC and TES-SEG matching 10S90ME of MAN B&W-a typical intelligent marine diesel engine-are derived and numerically calculated. Numerical results indicate that the above three systems are more feasible than traditional WHR systems. Though the total Power yield of TES-ORC system is the highest, TES system and TES-SEG system are more advantageous for their system simplicity and safety consideration.

Christos Katsanos - One of the best experts on this subject based on the ideXlab platform.

  • simulation of a heavy duty diesel engine with electrical turbocompounding system using operating charts for turbocharger components and Power Turbine
    Energy Conversion and Management, 2013
    Co-Authors: Christos Katsanos, Dimitrios T. Hountalas, T. C. Zannis
    Abstract:

    Abstract In diesel engines, approximately 30–40% of the energy supplied by the fuel is rejected to the ambience through exhaust gases. Therefore, there is a potentiality for further considerable increase of diesel engine efficiency with the utilization of exhaust gas heat and its conversion to mechanical or electrical energy. In the present study, the operational behavior of a heavy-duty (HD) diesel truck engine equipped with an electric turbocompounding system is examined on a theoretical basis. The electrical turbocompounding configuration comprised of a Power Turbine coupled to an electric generator, which is installed downstream to the turbocharger (T/C) Turbine. A diesel engine simulation model has been developed using operating charts for both turbocharger and Power Turbine. A method for introducing the operating charts into the engine model is described thoroughly. A parametric analysis is conducted with the developed simulation tool, where the varying parameter is the rotational speed of Power Turbine shaft. In this study, the interaction between the Power Turbine and the turbocharged diesel engine is examined in detail. The effect of Power Turbine speed on T/C components efficiencies, Power Turbine efficiency, exhaust pressure and temperature, engine boost pressure and air to fuel ratio is evaluated. In addition, theoretical results for the potential impact of electrical turbocompounding on the generated electric Power, net engine Power and relative improvement of brake specific fuel consumption (bsfc) are provided. The critical evaluation of the theoretical findings led to the basic conclusion that there is a significant potential for bsfc improvement of HD diesel truck engines with the proposed electrical turbocompounding concept, which reaches up to 4% at full engine load. The improvement of bsfc with electric turbocompounding appears to be more attractive solution in terms of technical complexity and installation cost against other competitive heat recovery technologies such as Rankine cycle systems.

  • Simulation of a heavy-duty diesel engine with electrical turbocompounding system using operating charts for turbocharger components and Power Turbine
    Energy Conversion and Management, 2013
    Co-Authors: Christos Katsanos, Dimitrios T. Hountalas, T. C. Zannis
    Abstract:

    In diesel engines, approximately 30-40% of the energy supplied by the fuel is rejected to the ambience through exhaust gases. Therefore, there is a potentiality for further considerable increase of diesel engine efficiency with the utilization of exhaust gas heat and its conversion to mechanical or electrical energy. In the present study, the operational behavior of a heavy-duty (HD) diesel truck engine equipped with an electric turbocompounding system is examined on a theoretical basis. The electrical turbocompounding configuration comprised of a Power Turbine coupled to an electric generator, which is installed downstream to the turbocharger (T/C) Turbine. A diesel engine simulation model has been developed using operating charts for both turbocharger and Power Turbine. A method for introducing the operating charts into the engine model is described thoroughly. A parametric analysis is conducted with the developed simulation tool, where the varying parameter is the rotational speed of Power Turbine shaft. In this study, the interaction between the Power Turbine and the turbocharged diesel engine is examined in detail. The effect of Power Turbine speed on T/C components efficiencies, Power Turbine efficiency, exhaust pressure and temperature, engine boost pressure and air to fuel ratio is evaluated. In addition, theoretical results for the potential impact of electrical turbocompounding on the generated electric Power, net engine Power and relative improvement of brake specific fuel consumption (bsfc) are provided. The critical evaluation of the theoretical findings led to the basic conclusion that there is a significant potential for bsfc improvement of HD diesel truck engines with the proposed electrical turbocompounding concept, which reaches up to 4% at full engine load. The improvement of bsfc with electric turbocompounding appears to be more attractive solution in terms of technical complexity and installation cost against other competitive heat recovery technologies such as Rankine cycle systems. © 2013 Elsevier Ltd. All rights reserved.

M Zheshu - One of the best experts on this subject based on the ideXlab platform.

  • Conceptual design and performance analysis of waste heat recovery system for intelligent marine diesel engines. part 2: Integrating Power Turbine into WHR systems
    International Journal of Heat and Technology, 2012
    Co-Authors: M Zheshu, Y Dong
    Abstract:

    Intelligent Marine Diesel Engines have been state of the art main engines employed by value-added new ship including large container vessel. For intelligent marine diesel engines, it is clear that the very low exhaust gas temperature after the turbocharger has led the impracticable installation of traditional WHR systems-ordinary Rankine Cycle (RC) conceptional waste heat recovery system and Organic Rankine Cycle (ORC) conceptional waste heat recovery system-onboard. To deal with Ulis dilemma, the way out is obtained from the increased exhaust gas temperature by integrating Power Turbine into WHR systems. Therefore, Thermo Efficiency System (TES system proposed by MAN B&W), TES-Organic Rankine Cycle (ORC) system and TES-Screw Expander Generator (SEG) system have been developed to improve such vessels energy efficiency. In mis paper, thermodynamic models for TES, TES-ORC and TES-SEG matching 10S90ME of MAN B&W-a typical intelligent marine diesel engine-are derived and numerically calculated. Numerical results indicate that the above three systems are more feasible than traditional WHR systems. Though the total Power yield of TES-ORC system is the highest, TES system and TES-SEG system are more advantageous for their system simplicity and safety consideration.

Dimitrios T. Hountalas - One of the best experts on this subject based on the ideXlab platform.

  • simulation of a heavy duty diesel engine with electrical turbocompounding system using operating charts for turbocharger components and Power Turbine
    Energy Conversion and Management, 2013
    Co-Authors: Christos Katsanos, Dimitrios T. Hountalas, T. C. Zannis
    Abstract:

    Abstract In diesel engines, approximately 30–40% of the energy supplied by the fuel is rejected to the ambience through exhaust gases. Therefore, there is a potentiality for further considerable increase of diesel engine efficiency with the utilization of exhaust gas heat and its conversion to mechanical or electrical energy. In the present study, the operational behavior of a heavy-duty (HD) diesel truck engine equipped with an electric turbocompounding system is examined on a theoretical basis. The electrical turbocompounding configuration comprised of a Power Turbine coupled to an electric generator, which is installed downstream to the turbocharger (T/C) Turbine. A diesel engine simulation model has been developed using operating charts for both turbocharger and Power Turbine. A method for introducing the operating charts into the engine model is described thoroughly. A parametric analysis is conducted with the developed simulation tool, where the varying parameter is the rotational speed of Power Turbine shaft. In this study, the interaction between the Power Turbine and the turbocharged diesel engine is examined in detail. The effect of Power Turbine speed on T/C components efficiencies, Power Turbine efficiency, exhaust pressure and temperature, engine boost pressure and air to fuel ratio is evaluated. In addition, theoretical results for the potential impact of electrical turbocompounding on the generated electric Power, net engine Power and relative improvement of brake specific fuel consumption (bsfc) are provided. The critical evaluation of the theoretical findings led to the basic conclusion that there is a significant potential for bsfc improvement of HD diesel truck engines with the proposed electrical turbocompounding concept, which reaches up to 4% at full engine load. The improvement of bsfc with electric turbocompounding appears to be more attractive solution in terms of technical complexity and installation cost against other competitive heat recovery technologies such as Rankine cycle systems.

  • Simulation of a heavy-duty diesel engine with electrical turbocompounding system using operating charts for turbocharger components and Power Turbine
    Energy Conversion and Management, 2013
    Co-Authors: Christos Katsanos, Dimitrios T. Hountalas, T. C. Zannis
    Abstract:

    In diesel engines, approximately 30-40% of the energy supplied by the fuel is rejected to the ambience through exhaust gases. Therefore, there is a potentiality for further considerable increase of diesel engine efficiency with the utilization of exhaust gas heat and its conversion to mechanical or electrical energy. In the present study, the operational behavior of a heavy-duty (HD) diesel truck engine equipped with an electric turbocompounding system is examined on a theoretical basis. The electrical turbocompounding configuration comprised of a Power Turbine coupled to an electric generator, which is installed downstream to the turbocharger (T/C) Turbine. A diesel engine simulation model has been developed using operating charts for both turbocharger and Power Turbine. A method for introducing the operating charts into the engine model is described thoroughly. A parametric analysis is conducted with the developed simulation tool, where the varying parameter is the rotational speed of Power Turbine shaft. In this study, the interaction between the Power Turbine and the turbocharged diesel engine is examined in detail. The effect of Power Turbine speed on T/C components efficiencies, Power Turbine efficiency, exhaust pressure and temperature, engine boost pressure and air to fuel ratio is evaluated. In addition, theoretical results for the potential impact of electrical turbocompounding on the generated electric Power, net engine Power and relative improvement of brake specific fuel consumption (bsfc) are provided. The critical evaluation of the theoretical findings led to the basic conclusion that there is a significant potential for bsfc improvement of HD diesel truck engines with the proposed electrical turbocompounding concept, which reaches up to 4% at full engine load. The improvement of bsfc with electric turbocompounding appears to be more attractive solution in terms of technical complexity and installation cost against other competitive heat recovery technologies such as Rankine cycle systems. © 2013 Elsevier Ltd. All rights reserved.