The Experts below are selected from a list of 19020 Experts worldwide ranked by ideXlab platform

Davide Di Battista - One of the best experts on this subject based on the ideXlab platform.

  • Development of a Sliding Vane Rotary Pump for Engine Cooling
    Energy Procedia, 2015
    Co-Authors: Roberto Cipollone, Davide Di Battista, Giulio Contaldi, Stefano Murgia, Marco Mauriello
    Abstract:

    Abstract The efficiency of a pump for Engine Cooling system in automotive sector can be very low (15%-20%) during the homologation cycle which is more oriented to medium and low Engine loads. Actual pump technology makes reference always to centrifugal pumps, which suffer in terms of efficiency when the speed changes as well as when head and flow rate delivered. In order to reduce the power absorbed by the pump, a different type is needed. A sliding vane rotary pump (SVRP) is a serious alternative having all the characteristics to fulfil the Engine Cooling circuit with high efficiency and reliability. In this work, a SVRP has been designed, built and tested for an existing Engine Cooling circuit: its performances were compared to the traditional (centrifugal) pump which today is mounted on that Engine. The benefits over the homologation cycle in terms of mechanical energy and CO2 saving have been emulated thanks to a comprehensive mathematical model.

  • Sliding vane rotary pump in Engine Cooling system for automotive sector
    Applied Thermal Engineering, 2015
    Co-Authors: Roberto Cipollone, Davide Di Battista
    Abstract:

    Abstract The Engine Cooling system in internal combustion Engines remained almost unchanged since many decades without significant modifications or improvements. Nevertheless, its revision, in terms of flow management among different vehicle's thermal needs, can play a crucial role in order to satisfy the recent and always more stringent commitments on emission reduction and fuel consumption saving. The Engine Cooling pump is, usually, mechanically linked to the Engine. Its absorbed power can be till to the 5% of a mean power of a passenger car in a homologation cycle. During this cycle, it works always at operating conditions which are far away from the design condition, with a very low overall efficiency (15%–20%). If pump efficiency is a new technological goal, several reasons push towards a different pump type. A sliding vane rotary pump (SVRP) is a serious alternative having all the characteristics to fulfill the Engine Cooling circuit: these pumps are less efficiency sensitive to the revolution speed, flow rate and head. In this work, a sliding vane rotary pump has been designed for an existing Engine Cooling circuit. It has been built and extensively tested in order to compare its performances to a traditional (centrifugal) mechanical type. The model of this novel pump has been inserted in a wide and comprehensive mathematical model of the Engine Cooling system which behaved as Engine virtual platform having been validated for the specific Engine. The mechanical energy absorbed by the novel pump (and that by the traditional centrifugal one) has been calculated when the Engine reproduced the international homologation driving cycles on which emission and fuel consumption are usually measured. The lower mechanical energy absorbed by the SVRP when compared to traditional type justifies a reduction of the order of 0.5 gCO 2 /km. This issue represents a very important result being today the Engine technological development massively oriented to the fuel consumption saving.

  • a novel Engine Cooling system with two circuits operating at different temperatures
    Energy Conversion and Management, 2013
    Co-Authors: Roberto Cipollone, Davide Di Battista, Angelo Gualtieri
    Abstract:

    Abstract The driver of the future Engine technology will be the reduction of the CO 2 emissions which is strictly related to fuel consumption saving. Recent regulations on pollutant emissions and greenhouse gases require a technological effort on Engine efficiency which can be made with a different set of options. It is important to consider those ones that have lower costs and a suitable ratio between CO 2 reduction and cost. Relevant importance is, so, assumed by a revision of the Engine Cooling system, which remained substantially unchanged for several years or decades. If the Engine and vehicle thermal needs are considered in a whole way, the Cooling system can be rearranged realizing the integration of conventional thermal needs (Engine, oil and EGR Cooling) with unconventional ones (cabin conditioning, charge air Cooling) realizing benefits in terms of Engine efficiency and comfort. In this paper, a mathematical model of an internal combustion Engine is presented. It is a lumped parameter model, physically consistent and it is used to appraise the performances of conventional and unconventional Engine Cooling systems and the integration in it of vehicle thermal needs. In particular, a double Cooling circuit has been considered, with two different temperature levels, that allows important improvements in terms of Engine warm up, fuel consumption saving and air boosting. The model has been applied to an existing Engine whose experimental characterization was done concerning the heat rejection toward the Cooling fluid. On this Engine, a double circuit at two temperature levels has been proposed, according to a layout which redistribute in an optimal way the Engine and vehicle thermal requirements.

Roberto Cipollone - One of the best experts on this subject based on the ideXlab platform.

  • Development of a Sliding Vane Rotary Pump for Engine Cooling
    Energy Procedia, 2015
    Co-Authors: Roberto Cipollone, Davide Di Battista, Giulio Contaldi, Stefano Murgia, Marco Mauriello
    Abstract:

    Abstract The efficiency of a pump for Engine Cooling system in automotive sector can be very low (15%-20%) during the homologation cycle which is more oriented to medium and low Engine loads. Actual pump technology makes reference always to centrifugal pumps, which suffer in terms of efficiency when the speed changes as well as when head and flow rate delivered. In order to reduce the power absorbed by the pump, a different type is needed. A sliding vane rotary pump (SVRP) is a serious alternative having all the characteristics to fulfil the Engine Cooling circuit with high efficiency and reliability. In this work, a SVRP has been designed, built and tested for an existing Engine Cooling circuit: its performances were compared to the traditional (centrifugal) pump which today is mounted on that Engine. The benefits over the homologation cycle in terms of mechanical energy and CO2 saving have been emulated thanks to a comprehensive mathematical model.

  • Sliding vane rotary pump in Engine Cooling system for automotive sector
    Applied Thermal Engineering, 2015
    Co-Authors: Roberto Cipollone, Davide Di Battista
    Abstract:

    Abstract The Engine Cooling system in internal combustion Engines remained almost unchanged since many decades without significant modifications or improvements. Nevertheless, its revision, in terms of flow management among different vehicle's thermal needs, can play a crucial role in order to satisfy the recent and always more stringent commitments on emission reduction and fuel consumption saving. The Engine Cooling pump is, usually, mechanically linked to the Engine. Its absorbed power can be till to the 5% of a mean power of a passenger car in a homologation cycle. During this cycle, it works always at operating conditions which are far away from the design condition, with a very low overall efficiency (15%–20%). If pump efficiency is a new technological goal, several reasons push towards a different pump type. A sliding vane rotary pump (SVRP) is a serious alternative having all the characteristics to fulfill the Engine Cooling circuit: these pumps are less efficiency sensitive to the revolution speed, flow rate and head. In this work, a sliding vane rotary pump has been designed for an existing Engine Cooling circuit. It has been built and extensively tested in order to compare its performances to a traditional (centrifugal) mechanical type. The model of this novel pump has been inserted in a wide and comprehensive mathematical model of the Engine Cooling system which behaved as Engine virtual platform having been validated for the specific Engine. The mechanical energy absorbed by the novel pump (and that by the traditional centrifugal one) has been calculated when the Engine reproduced the international homologation driving cycles on which emission and fuel consumption are usually measured. The lower mechanical energy absorbed by the SVRP when compared to traditional type justifies a reduction of the order of 0.5 gCO 2 /km. This issue represents a very important result being today the Engine technological development massively oriented to the fuel consumption saving.

  • a novel Engine Cooling system with two circuits operating at different temperatures
    Energy Conversion and Management, 2013
    Co-Authors: Roberto Cipollone, Davide Di Battista, Angelo Gualtieri
    Abstract:

    Abstract The driver of the future Engine technology will be the reduction of the CO 2 emissions which is strictly related to fuel consumption saving. Recent regulations on pollutant emissions and greenhouse gases require a technological effort on Engine efficiency which can be made with a different set of options. It is important to consider those ones that have lower costs and a suitable ratio between CO 2 reduction and cost. Relevant importance is, so, assumed by a revision of the Engine Cooling system, which remained substantially unchanged for several years or decades. If the Engine and vehicle thermal needs are considered in a whole way, the Cooling system can be rearranged realizing the integration of conventional thermal needs (Engine, oil and EGR Cooling) with unconventional ones (cabin conditioning, charge air Cooling) realizing benefits in terms of Engine efficiency and comfort. In this paper, a mathematical model of an internal combustion Engine is presented. It is a lumped parameter model, physically consistent and it is used to appraise the performances of conventional and unconventional Engine Cooling systems and the integration in it of vehicle thermal needs. In particular, a double Cooling circuit has been considered, with two different temperature levels, that allows important improvements in terms of Engine warm up, fuel consumption saving and air boosting. The model has been applied to an existing Engine whose experimental characterization was done concerning the heat rejection toward the Cooling fluid. On this Engine, a double circuit at two temperature levels has been proposed, according to a layout which redistribute in an optimal way the Engine and vehicle thermal requirements.

Marco Mauriello - One of the best experts on this subject based on the ideXlab platform.

  • Development of a Sliding Vane Rotary Pump for Engine Cooling
    Energy Procedia, 2015
    Co-Authors: Roberto Cipollone, Davide Di Battista, Giulio Contaldi, Stefano Murgia, Marco Mauriello
    Abstract:

    Abstract The efficiency of a pump for Engine Cooling system in automotive sector can be very low (15%-20%) during the homologation cycle which is more oriented to medium and low Engine loads. Actual pump technology makes reference always to centrifugal pumps, which suffer in terms of efficiency when the speed changes as well as when head and flow rate delivered. In order to reduce the power absorbed by the pump, a different type is needed. A sliding vane rotary pump (SVRP) is a serious alternative having all the characteristics to fulfil the Engine Cooling circuit with high efficiency and reliability. In this work, a SVRP has been designed, built and tested for an existing Engine Cooling circuit: its performances were compared to the traditional (centrifugal) pump which today is mounted on that Engine. The benefits over the homologation cycle in terms of mechanical energy and CO2 saving have been emulated thanks to a comprehensive mathematical model.

Rizalman Mamat - One of the best experts on this subject based on the ideXlab platform.

  • Recent advancement of nanofluids in Engine Cooling system
    Renewable and Sustainable Energy Reviews, 2017
    Co-Authors: Nor Azwadi Che Sidik, Muhammad Noor Afiq Witri Mohd Yazid, Rizalman Mamat
    Abstract:

    Engine Cooling system using nanofluids provides a new foundation for technological integration and innovation. Nanofluids are suitable coolant due to its high thermal diffusivity and can be applied to any system that needs a quick response to thermal changes such as vehicle Engine. The presence of nanoparticles in nanofluids contributes better flow of mixing and higher thermal conductivity compared to pure fluid. The current review begins with the overview of preparation methods and thermal conductivity improvement of fluids with nanoparticles. Then, the thermal performance of vehicle Engine using nanofluids is highlighted. It has also given emphasis on the major applications of nanofluids in radiator system and as lubricants for improving heat removal efficiency from vehicle Engine.

  • A review on the application of nanofluids in vehicle Engine Cooling system
    International Communications in Heat and Mass Transfer, 2015
    Co-Authors: Nor Azwadi Che Sidik, Muhammad Noor Afiq Witri Mohd Yazid, Rizalman Mamat
    Abstract:

    This paper reviewed the application of nanofluids in vehicle Engine Cooling system. So far, nanoparticles have been used in Engine oil, transmission oil, and radiator coolant to enhance heat transfer removal from vehicle Engine. The heat transfer performance of nanofluids has been reported to perform better compared to pure fluid. This review focused on the experimental and numerical studies by previous researchers and their suggested amount of nanoparticles for optimum performance in vehicle Engine Cooling system. Finally, the conclusions and important summaries were presented according to the data collected.

Nor Azwadi Che Sidik - One of the best experts on this subject based on the ideXlab platform.

  • Recent advancement of nanofluids in Engine Cooling system
    Renewable and Sustainable Energy Reviews, 2017
    Co-Authors: Nor Azwadi Che Sidik, Muhammad Noor Afiq Witri Mohd Yazid, Rizalman Mamat
    Abstract:

    Engine Cooling system using nanofluids provides a new foundation for technological integration and innovation. Nanofluids are suitable coolant due to its high thermal diffusivity and can be applied to any system that needs a quick response to thermal changes such as vehicle Engine. The presence of nanoparticles in nanofluids contributes better flow of mixing and higher thermal conductivity compared to pure fluid. The current review begins with the overview of preparation methods and thermal conductivity improvement of fluids with nanoparticles. Then, the thermal performance of vehicle Engine using nanofluids is highlighted. It has also given emphasis on the major applications of nanofluids in radiator system and as lubricants for improving heat removal efficiency from vehicle Engine.

  • A review on the application of nanofluids in vehicle Engine Cooling system
    International Communications in Heat and Mass Transfer, 2015
    Co-Authors: Nor Azwadi Che Sidik, Muhammad Noor Afiq Witri Mohd Yazid, Rizalman Mamat
    Abstract:

    This paper reviewed the application of nanofluids in vehicle Engine Cooling system. So far, nanoparticles have been used in Engine oil, transmission oil, and radiator coolant to enhance heat transfer removal from vehicle Engine. The heat transfer performance of nanofluids has been reported to perform better compared to pure fluid. This review focused on the experimental and numerical studies by previous researchers and their suggested amount of nanoparticles for optimum performance in vehicle Engine Cooling system. Finally, the conclusions and important summaries were presented according to the data collected.