The Experts below are selected from a list of 303 Experts worldwide ranked by ideXlab platform

T F U Rego - One of the best experts on this subject based on the ideXlab platform.

  • automotive exhaust gas flow control for an ammonia water absorption refrigeration system
    Applied Thermal Engineering, 2014
    Co-Authors: A T Rego, Sergio De Morais Hanriot, A F Oliveira, Pedro Paiva Brito, T F U Rego
    Abstract:

    Abstract A considerable part of the energy generated by an automotive internal combustion engine is wasted as Heat in the exhaust system. This wasted Heat could be recovered and applied to power auxiliary systems in a vehicle, contributing to its overall energy efficiency. In the present work, the experimental analysis of an absorption refrigeration system was performed. The exhaust system of an automotive internal combustion engine was connected to the generator element of an absorption refrigeration system. The performance of the absorption refrigerator was evaluated as a function of the supplied Heat. The use of a control strategy for the engine exhaust gas mass flow rate was implemented to optimize the system. Exhaust gas flow was controlled by step-motor actuated valves commanded by a microcontroller in which a proportional-integral control scheme was implemented. Information such as engine torque, speed, key temperatures in the absorption cycle, as well as internal temperatures of the refrigerator was measured in a transient regime. The results indicated that the refrigeration system exhibited better performance when the amount of Input Heat is controlled based on the temperature of the absorption cycle generator. It was possible to conclude that, by dynamically controlling the amount of Input Heat, the utilisation range of the absorption refrigeration system powered by exhaust gas Heat could be expanded in order to incorporate high engine speed operating conditions.

  • Automotive exhaust gas flow control for an ammonia–water absorption refrigeration system
    Applied Thermal Engineering, 2013
    Co-Authors: A T Rego, Sergio De Morais Hanriot, A F Oliveira, Pedro Paiva Brito, T F U Rego
    Abstract:

    Abstract A considerable part of the energy generated by an automotive internal combustion engine is wasted as Heat in the exhaust system. This wasted Heat could be recovered and applied to power auxiliary systems in a vehicle, contributing to its overall energy efficiency. In the present work, the experimental analysis of an absorption refrigeration system was performed. The exhaust system of an automotive internal combustion engine was connected to the generator element of an absorption refrigeration system. The performance of the absorption refrigerator was evaluated as a function of the supplied Heat. The use of a control strategy for the engine exhaust gas mass flow rate was implemented to optimize the system. Exhaust gas flow was controlled by step-motor actuated valves commanded by a microcontroller in which a proportional-integral control scheme was implemented. Information such as engine torque, speed, key temperatures in the absorption cycle, as well as internal temperatures of the refrigerator was measured in a transient regime. The results indicated that the refrigeration system exhibited better performance when the amount of Input Heat is controlled based on the temperature of the absorption cycle generator. It was possible to conclude that, by dynamically controlling the amount of Input Heat, the utilisation range of the absorption refrigeration system powered by exhaust gas Heat could be expanded in order to incorporate high engine speed operating conditions.

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

  • Measurement of acoustic output power in a traveling wave engine.
    Ultrasonics, 2006
    Co-Authors: M Miwa, T Sumi, T Biwa, Y Ueda, T Yazaki
    Abstract:

    We built and tested a double-loop thermoacoustic cooler consisting of an engine-loop, a branch resonator, and a cooler-loop. The cooling power of 6.4 W was obtained at the cooling temperature of 0 degrees C, when the Input Heat power of 416 W was supplied to the engine-loop. We measured the acoustic power and found that the output power emitted from the engine-loop was 12 W, and that the Input acoustic power entering the cooler-loop was 6 W.

  • Measurement of acoustic output power in a traveling wave engine
    Ultrasonics, 2006
    Co-Authors: M Miwa, T Sumi, T Biwa, Y Ueda, T Yazaki
    Abstract:

    Abstract We built and tested a double-loop thermoacoustic cooler consisting of an engine-loop, a branch resonator, and a cooler-loop. The cooling power of 6.4 W was obtained at the cooling temperature of 0 °C, when the Input Heat power of 416 W was supplied to the engine-loop. We measured the acoustic power and found that the output power emitted from the engine-loop was 12 W, and that the Input acoustic power entering the cooler-loop was 6 W.

A T Rego - One of the best experts on this subject based on the ideXlab platform.

  • automotive exhaust gas flow control for an ammonia water absorption refrigeration system
    Applied Thermal Engineering, 2014
    Co-Authors: A T Rego, Sergio De Morais Hanriot, A F Oliveira, Pedro Paiva Brito, T F U Rego
    Abstract:

    Abstract A considerable part of the energy generated by an automotive internal combustion engine is wasted as Heat in the exhaust system. This wasted Heat could be recovered and applied to power auxiliary systems in a vehicle, contributing to its overall energy efficiency. In the present work, the experimental analysis of an absorption refrigeration system was performed. The exhaust system of an automotive internal combustion engine was connected to the generator element of an absorption refrigeration system. The performance of the absorption refrigerator was evaluated as a function of the supplied Heat. The use of a control strategy for the engine exhaust gas mass flow rate was implemented to optimize the system. Exhaust gas flow was controlled by step-motor actuated valves commanded by a microcontroller in which a proportional-integral control scheme was implemented. Information such as engine torque, speed, key temperatures in the absorption cycle, as well as internal temperatures of the refrigerator was measured in a transient regime. The results indicated that the refrigeration system exhibited better performance when the amount of Input Heat is controlled based on the temperature of the absorption cycle generator. It was possible to conclude that, by dynamically controlling the amount of Input Heat, the utilisation range of the absorption refrigeration system powered by exhaust gas Heat could be expanded in order to incorporate high engine speed operating conditions.

  • Automotive exhaust gas flow control for an ammonia–water absorption refrigeration system
    Applied Thermal Engineering, 2013
    Co-Authors: A T Rego, Sergio De Morais Hanriot, A F Oliveira, Pedro Paiva Brito, T F U Rego
    Abstract:

    Abstract A considerable part of the energy generated by an automotive internal combustion engine is wasted as Heat in the exhaust system. This wasted Heat could be recovered and applied to power auxiliary systems in a vehicle, contributing to its overall energy efficiency. In the present work, the experimental analysis of an absorption refrigeration system was performed. The exhaust system of an automotive internal combustion engine was connected to the generator element of an absorption refrigeration system. The performance of the absorption refrigerator was evaluated as a function of the supplied Heat. The use of a control strategy for the engine exhaust gas mass flow rate was implemented to optimize the system. Exhaust gas flow was controlled by step-motor actuated valves commanded by a microcontroller in which a proportional-integral control scheme was implemented. Information such as engine torque, speed, key temperatures in the absorption cycle, as well as internal temperatures of the refrigerator was measured in a transient regime. The results indicated that the refrigeration system exhibited better performance when the amount of Input Heat is controlled based on the temperature of the absorption cycle generator. It was possible to conclude that, by dynamically controlling the amount of Input Heat, the utilisation range of the absorption refrigeration system powered by exhaust gas Heat could be expanded in order to incorporate high engine speed operating conditions.

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

  • Measurement of acoustic output power in a traveling wave engine.
    Ultrasonics, 2006
    Co-Authors: M Miwa, T Sumi, T Biwa, Y Ueda, T Yazaki
    Abstract:

    We built and tested a double-loop thermoacoustic cooler consisting of an engine-loop, a branch resonator, and a cooler-loop. The cooling power of 6.4 W was obtained at the cooling temperature of 0 degrees C, when the Input Heat power of 416 W was supplied to the engine-loop. We measured the acoustic power and found that the output power emitted from the engine-loop was 12 W, and that the Input acoustic power entering the cooler-loop was 6 W.

  • Measurement of acoustic output power in a traveling wave engine
    Ultrasonics, 2006
    Co-Authors: M Miwa, T Sumi, T Biwa, Y Ueda, T Yazaki
    Abstract:

    Abstract We built and tested a double-loop thermoacoustic cooler consisting of an engine-loop, a branch resonator, and a cooler-loop. The cooling power of 6.4 W was obtained at the cooling temperature of 0 °C, when the Input Heat power of 416 W was supplied to the engine-loop. We measured the acoustic power and found that the output power emitted from the engine-loop was 12 W, and that the Input acoustic power entering the cooler-loop was 6 W.

A F Oliveira - One of the best experts on this subject based on the ideXlab platform.

  • automotive exhaust gas flow control for an ammonia water absorption refrigeration system
    Applied Thermal Engineering, 2014
    Co-Authors: A T Rego, Sergio De Morais Hanriot, A F Oliveira, Pedro Paiva Brito, T F U Rego
    Abstract:

    Abstract A considerable part of the energy generated by an automotive internal combustion engine is wasted as Heat in the exhaust system. This wasted Heat could be recovered and applied to power auxiliary systems in a vehicle, contributing to its overall energy efficiency. In the present work, the experimental analysis of an absorption refrigeration system was performed. The exhaust system of an automotive internal combustion engine was connected to the generator element of an absorption refrigeration system. The performance of the absorption refrigerator was evaluated as a function of the supplied Heat. The use of a control strategy for the engine exhaust gas mass flow rate was implemented to optimize the system. Exhaust gas flow was controlled by step-motor actuated valves commanded by a microcontroller in which a proportional-integral control scheme was implemented. Information such as engine torque, speed, key temperatures in the absorption cycle, as well as internal temperatures of the refrigerator was measured in a transient regime. The results indicated that the refrigeration system exhibited better performance when the amount of Input Heat is controlled based on the temperature of the absorption cycle generator. It was possible to conclude that, by dynamically controlling the amount of Input Heat, the utilisation range of the absorption refrigeration system powered by exhaust gas Heat could be expanded in order to incorporate high engine speed operating conditions.

  • Automotive exhaust gas flow control for an ammonia–water absorption refrigeration system
    Applied Thermal Engineering, 2013
    Co-Authors: A T Rego, Sergio De Morais Hanriot, A F Oliveira, Pedro Paiva Brito, T F U Rego
    Abstract:

    Abstract A considerable part of the energy generated by an automotive internal combustion engine is wasted as Heat in the exhaust system. This wasted Heat could be recovered and applied to power auxiliary systems in a vehicle, contributing to its overall energy efficiency. In the present work, the experimental analysis of an absorption refrigeration system was performed. The exhaust system of an automotive internal combustion engine was connected to the generator element of an absorption refrigeration system. The performance of the absorption refrigerator was evaluated as a function of the supplied Heat. The use of a control strategy for the engine exhaust gas mass flow rate was implemented to optimize the system. Exhaust gas flow was controlled by step-motor actuated valves commanded by a microcontroller in which a proportional-integral control scheme was implemented. Information such as engine torque, speed, key temperatures in the absorption cycle, as well as internal temperatures of the refrigerator was measured in a transient regime. The results indicated that the refrigeration system exhibited better performance when the amount of Input Heat is controlled based on the temperature of the absorption cycle generator. It was possible to conclude that, by dynamically controlling the amount of Input Heat, the utilisation range of the absorption refrigeration system powered by exhaust gas Heat could be expanded in order to incorporate high engine speed operating conditions.