The Experts below are selected from a list of 52605 Experts worldwide ranked by ideXlab platform

Ciro A Rodriguez - One of the best experts on this subject based on the ideXlab platform.

  • Analysis and simulation of a wind-Electric Battery charging system
    International Journal of Energy Research, 2006
    Co-Authors: Jaime Martinez, Alfredo Morales, Armando Llamas, Oliver Probst, Ciro A Rodriguez
    Abstract:

    A small commercial wind-Electric Battery-charging system based on a three-bladed rotor has been analysed in a detailed fashion. The system consists of a synchronous generator with permanent magnets, a six-pulse rectifier and a Battery bank with charge controller. A steady-state power curve is predicted based on the Electric characteristics found experimentally and the aerodynamic performance of the rotor simulated with a version of blade element momentum (BEM) theory developed in our group. The BEM code has been designed to account for variable Reynolds numbers at different blade sections and stall conditions. The findings are compared with the manufacturer's specifications, and a detailed discussion is provided. A very good agreement with the steady-state power curve given by the manufacturer has been obtained after accounting for different sources of power losses, such as voltage drops in the rectifier, Joule heating in the power cables and losses in the generator's core. The system is found to operate near the aerodynamic optimum for all wind speeds studied, whereas Electrical losses are significant near rated power. Some recommendations for improving the system performance are provided. Copyright © 2005 John Wiley & Sons, Ltd.

  • Analysis and simulation of a wind‐Electric Battery charging system
    International Journal of Energy Research, 2006
    Co-Authors: Jaime Martinez, Alfredo Morales, Armando Llamas, Oliver Probst, Ciro A Rodriguez
    Abstract:

    A small commercial wind-Electric Battery-charging system based on a three-bladed rotor has been analysed in a detailed fashion. The system consists of a synchronous generator with permanent magnets, a six-pulse rectifier and a Battery bank with charge controller. A steady-state power curve is predicted based on the Electric characteristics found experimentally and the aerodynamic performance of the rotor simulated with a version of blade element momentum (BEM) theory developed in our group. The BEM code has been designed to account for variable Reynolds numbers at different blade sections and stall conditions. The findings are compared with the manufacturer's specifications, and a detailed discussion is provided. A very good agreement with the steady-state power curve given by the manufacturer has been obtained after accounting for different sources of power losses, such as voltage drops in the rectifier, Joule heating in the power cables and losses in the generator's core. The system is found to operate near the aerodynamic optimum for all wind speeds studied, whereas Electrical losses are significant near rated power. Some recommendations for improving the system performance are provided. Copyright © 2005 John Wiley & Sons, Ltd.

Makoto Takizawa - One of the best experts on this subject based on the ideXlab platform.

  • An Energy-Saving Unicast Routing Protocol in Wireless Ad-hoc Network
    Innovative Mobile and Internet Services in Ubiquitous Computing, 2018
    Co-Authors: Emi Ogawa, Shigenari Nakamura, Makoto Takizawa
    Abstract:

    Wireless ad-hoc networks are widely used in various types of applications like vehicle-to-vehicle (V2V) networks. Here, each node can deliver messages to only nodes in the wireless communication range. Messages are forwarded to destination nodes by wireless node-to-node communication in ad-hoc routing protocols. It is critical to reduce the Electric energy consumption of nodes to send messages since nodes work by using the Electric Battery. In this paper, we newly propose a reliable unicast communication protocol named ESU (Energy-Saving Unicast routing) protocol where an energy-efficient route from a source node to a destination node is dynamically found by selecting nodes which consume smaller Electric energy. In the evaluation, we show the Electric energy consumption of nodes can be reduced in the ESU protocol compared with other protocols.

  • IMIS - An Energy-Saving Unicast Routing Protocol in Wireless Ad-hoc Network
    Innovative Mobile and Internet Services in Ubiquitous Computing, 2017
    Co-Authors: Emi Ogawa, Shigenari Nakamura, Makoto Takizawa
    Abstract:

    Wireless ad-hoc networks are widely used in various types of applications like vehicle-to-vehicle (V2V) networks. Here, each node can deliver messages to only nodes in the wireless communication range. Messages are forwarded to destination nodes by wireless node-to-node communication in ad-hoc routing protocols. It is critical to reduce the Electric energy consumption of nodes to send messages since nodes work by using the Electric Battery. In this paper, we newly propose a reliable unicast communication protocol named ESU (Energy-Saving Unicast routing) protocol where an energy-efficient route from a source node to a destination node is dynamically found by selecting nodes which consume smaller Electric energy. In the evaluation, we show the Electric energy consumption of nodes can be reduced in the ESU protocol compared with other protocols.

Jaime Martinez - One of the best experts on this subject based on the ideXlab platform.

  • Analysis and simulation of a wind-Electric Battery charging system
    International Journal of Energy Research, 2006
    Co-Authors: Jaime Martinez, Alfredo Morales, Armando Llamas, Oliver Probst, Ciro A Rodriguez
    Abstract:

    A small commercial wind-Electric Battery-charging system based on a three-bladed rotor has been analysed in a detailed fashion. The system consists of a synchronous generator with permanent magnets, a six-pulse rectifier and a Battery bank with charge controller. A steady-state power curve is predicted based on the Electric characteristics found experimentally and the aerodynamic performance of the rotor simulated with a version of blade element momentum (BEM) theory developed in our group. The BEM code has been designed to account for variable Reynolds numbers at different blade sections and stall conditions. The findings are compared with the manufacturer's specifications, and a detailed discussion is provided. A very good agreement with the steady-state power curve given by the manufacturer has been obtained after accounting for different sources of power losses, such as voltage drops in the rectifier, Joule heating in the power cables and losses in the generator's core. The system is found to operate near the aerodynamic optimum for all wind speeds studied, whereas Electrical losses are significant near rated power. Some recommendations for improving the system performance are provided. Copyright © 2005 John Wiley & Sons, Ltd.

  • Analysis and simulation of a wind‐Electric Battery charging system
    International Journal of Energy Research, 2006
    Co-Authors: Jaime Martinez, Alfredo Morales, Armando Llamas, Oliver Probst, Ciro A Rodriguez
    Abstract:

    A small commercial wind-Electric Battery-charging system based on a three-bladed rotor has been analysed in a detailed fashion. The system consists of a synchronous generator with permanent magnets, a six-pulse rectifier and a Battery bank with charge controller. A steady-state power curve is predicted based on the Electric characteristics found experimentally and the aerodynamic performance of the rotor simulated with a version of blade element momentum (BEM) theory developed in our group. The BEM code has been designed to account for variable Reynolds numbers at different blade sections and stall conditions. The findings are compared with the manufacturer's specifications, and a detailed discussion is provided. A very good agreement with the steady-state power curve given by the manufacturer has been obtained after accounting for different sources of power losses, such as voltage drops in the rectifier, Joule heating in the power cables and losses in the generator's core. The system is found to operate near the aerodynamic optimum for all wind speeds studied, whereas Electrical losses are significant near rated power. Some recommendations for improving the system performance are provided. Copyright © 2005 John Wiley & Sons, Ltd.

Jincan Chen - One of the best experts on this subject based on the ideXlab platform.

  • The maximum work output of an Electric Battery in a given time
    Renewable Energy, 2002
    Co-Authors: Jincan Chen, Zheqiang Shi, Xuyang Chen
    Abstract:

    A new model of an Electric Battery is established, based on the simplest Battery model and Denno's Battery model with an internal dissipation. The model is used to investigate the fundamental problem of how to maximize the work output of an Electric Battery in a given time. The important relation of the voltage across the Battery terminals varying with the discharging time is derived by using variational calculus. The maximum work output of the Battery is calculated. The optimal matching condition of the load resistance is determined. The reasonable range of the discharging time is given. The other characteristics of the Battery at the maximum work output are discussed further. The results obtained here have some theoretical applications not only for raising the utilization of the Electric energy stored in batteries, but also for improving the performance of some Electric circuits.

  • Maximum work output of an Electric Battery and its load matching
    Energy Conversion and Management, 2002
    Co-Authors: Zheqiang Shi, Jincan Chen, Chih Wu
    Abstract:

    A simple Battery model established by Denno [Power system design and applications for alternative energy sources, Englewood Cliffs, NJ: Prentice-Hall: 1989] is used to investigate the basic question of how to maximize the work output of an Electric Battery. The discharge time is determined reasonably and the load resistance is matched optimally. The results obtained here can be used to explain quantitatively the example given by Gyftopoulos [Energy 24 (1999) 1035].

Zheqiang Shi - One of the best experts on this subject based on the ideXlab platform.

  • The maximum work output of an Electric Battery in a given time
    Renewable Energy, 2002
    Co-Authors: Jincan Chen, Zheqiang Shi, Xuyang Chen
    Abstract:

    A new model of an Electric Battery is established, based on the simplest Battery model and Denno's Battery model with an internal dissipation. The model is used to investigate the fundamental problem of how to maximize the work output of an Electric Battery in a given time. The important relation of the voltage across the Battery terminals varying with the discharging time is derived by using variational calculus. The maximum work output of the Battery is calculated. The optimal matching condition of the load resistance is determined. The reasonable range of the discharging time is given. The other characteristics of the Battery at the maximum work output are discussed further. The results obtained here have some theoretical applications not only for raising the utilization of the Electric energy stored in batteries, but also for improving the performance of some Electric circuits.

  • Maximum work output of an Electric Battery and its load matching
    Energy Conversion and Management, 2002
    Co-Authors: Zheqiang Shi, Jincan Chen, Chih Wu
    Abstract:

    A simple Battery model established by Denno [Power system design and applications for alternative energy sources, Englewood Cliffs, NJ: Prentice-Hall: 1989] is used to investigate the basic question of how to maximize the work output of an Electric Battery. The discharge time is determined reasonably and the load resistance is matched optimally. The results obtained here can be used to explain quantitatively the example given by Gyftopoulos [Energy 24 (1999) 1035].