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Jeremiah K. Kiplagat - One of the best experts on this subject based on the ideXlab platform.

  • a target oriented solid gas thermochemical sorption heat transformer for Integrated Energy Storage and Energy upgrade
    Aiche Journal, 2013
    Co-Authors: R Z Wang, Jeremiah K. Kiplagat
    Abstract:

    An innovative target-oriented solid-gas thermochemical sorption heat transformer is developed for the Integrated Energy Storage and Energy upgrade of low-grade thermal Energy. The operating principle of the proposed Energy Storage system is based on the reversible solid-gas chemical reaction whereby thermal Energy is stored in form of chemical bonds with thermochemical sorption process. A novel thermochemical sorption cycle is proposed to upgrade the stored thermal Energy by using a pressure-reducing desorption method during Energy Storage process and a temperature-lift adsorption technique during Energy release process. Theoretical analysis showed that the proposed target-oriented thermochemical sorption heat transformer is effective for the Integrated Energy Storage and Energy upgrade, and the low-grade thermal Energy can be upgraded from 87 to 171°C using a group of sorption working pair MnCl2-CaCl2-NH3. Moreover, it can give the flexibility of deciding the temperature magnitude of Energy upgrade by choosing appropriate sorption working pairs. © 2012 American Institute of Chemical Engineers AIChE J, 59: 1334–1347, 2013

  • performance analysis of an Integrated Energy Storage and Energy upgrade thermochemical solid gas sorption system for seasonal Storage of solar thermal Energy
    Energy, 2013
    Co-Authors: T. X. Li, Jeremiah K. Kiplagat, R Z Wang, Yong Tae Kang
    Abstract:

    An innovative dual-mode thermochemical sorption Energy Storage method is proposed for seasonal Storage of solar thermal Energy with little heat losses. During the charging phase in summer, solar thermal Energy is stored in form of chemical bonds resulting from thermochemical decomposition process, which enables the stored Energy to be kept several months at ambient temperature. During the discharging phase in winter, the stored thermal Energy is released in the form of chemical reaction heat resulting from thermochemical synthesis process. Thermodynamic analysis showed that the advanced dual-mode thermochemical sorption Energy Storage is an effective method for the long-term seasonal Storage of solar Energy. A coefficient of performance (COPh) of 0.6 and Energy density higher than 1000 kJ/kg of salt can be attained from the proposed system. During the discharging phase at low ambient temperatures, the stored thermal Energy can be upgraded by use of a solid–gas thermochemical sorption heat transformer cycle. The proposed thermochemical sorption Energy Storage has distinct advantages over the conventional sensible heat and latent heat Storage, such as higher Energy Storage density, little heat losses, Integrated Energy Storage and Energy upgrade, and thus it can contribute to improve the seasonal utilization of solar thermal Energy.

J.k. Kiplagat - One of the best experts on this subject based on the ideXlab platform.

  • Performance analysis of an Integrated Energy Storage and Energy upgrade thermochemical solid–gas sorption system for seasonal Storage of solar thermal Energy
    Energy, 2013
    Co-Authors: Ruzhu Wang, J.k. Kiplagat, Yong Tae Kang
    Abstract:

    Abstract An innovative dual-mode thermochemical sorption Energy Storage method is proposed for seasonal Storage of solar thermal Energy with little heat losses. During the charging phase in summer, solar thermal Energy is stored in form of chemical bonds resulting from thermochemical decomposition process, which enables the stored Energy to be kept several months at ambient temperature. During the discharging phase in winter, the stored thermal Energy is released in the form of chemical reaction heat resulting from thermochemical synthesis process. Thermodynamic analysis showed that the advanced dual-mode thermochemical sorption Energy Storage is an effective method for the long-term seasonal Storage of solar Energy. A coefficient of performance (COPh) of 0.6 and Energy density higher than 1000 kJ/kg of salt can be attained from the proposed system. During the discharging phase at low ambient temperatures, the stored thermal Energy can be upgraded by use of a solid–gas thermochemical sorption heat transformer cycle. The proposed thermochemical sorption Energy Storage has distinct advantages over the conventional sensible heat and latent heat Storage, such as higher Energy Storage density, little heat losses, Integrated Energy Storage and Energy upgrade, and thus it can contribute to improve the seasonal utilization of solar thermal Energy.

  • A target‐oriented solid‐gas thermochemical sorption heat transformer for Integrated Energy Storage and Energy upgrade
    AIChE Journal, 2012
    Co-Authors: Ruzhu Wang, J.k. Kiplagat
    Abstract:

    An innovative target-oriented solid-gas thermochemical sorption heat transformer is developed for the Integrated Energy Storage and Energy upgrade of low-grade thermal Energy. The operating principle of the proposed Energy Storage system is based on the reversible solid-gas chemical reaction whereby thermal Energy is stored in form of chemical bonds with thermochemical sorption process. A novel thermochemical sorption cycle is proposed to upgrade the stored thermal Energy by using a pressure-reducing desorption method during Energy Storage process and a temperature-lift adsorption technique during Energy release process. Theoretical analysis showed that the proposed target-oriented thermochemical sorption heat transformer is effective for the Integrated Energy Storage and Energy upgrade, and the low-grade thermal Energy can be upgraded from 87 to 171°C using a group of sorption working pair MnCl2-CaCl2-NH3. Moreover, it can give the flexibility of deciding the temperature magnitude of Energy upgrade by choosing appropriate sorption working pairs. © 2012 American Institute of Chemical Engineers AIChE J, 59: 1334–1347, 2013

R Z Wang - One of the best experts on this subject based on the ideXlab platform.

  • Integrated Energy Storage and Energy upgrade combined cooling and heating supply and waste heat recovery with solid gas thermochemical sorption heat transformer
    International Journal of Heat and Mass Transfer, 2014
    Co-Authors: R Z Wang, T. Yan, T F Ishugah
    Abstract:

    Abstract Thermal Energy Storage is a key technology for global Energy sustainability. It plays a vital role in renewable Energy application and waste heat recovery by adjusting the time-discrepancy, space-discrepancy and instability between Energy supply and Energy demand. A promising multifunctional solid–gas thermochemical sorption heat transformer is proposed in this paper for Integrated Energy Storage and Energy upgrade, combined cooling and heating supply, and recovering waste heat. Thermal Energy is stored in form of chemical potential resulting from thermochemical sorption process of solid–gas working pair. The operating principle and working performance of the proposed thermochemical sorption heat transformer is analyzed and compared at different operating conditions. Thermodynamic analysis showed that the advanced thermochemical sorption heat transformer has multipurpose Energy application for Integrated Energy Storage as well as Energy upgrade, combined cooling and heating supply, and waste heat recovery. Moreover, it has a distinct advantage of 10 times Energy density higher than conventional sensible heat and latent heat Storage methods. This makes it a very promising compact high Energy density heat Storage method for Integrated Energy Storage and Energy upgrade. The presented Energy Storage technology can promote the application of thermal Energy Storage and waste heat recovery in large-scale industrial processes as well as the use of renewable Energy sources.

  • a target oriented solid gas thermochemical sorption heat transformer for Integrated Energy Storage and Energy upgrade
    Aiche Journal, 2013
    Co-Authors: R Z Wang, Jeremiah K. Kiplagat
    Abstract:

    An innovative target-oriented solid-gas thermochemical sorption heat transformer is developed for the Integrated Energy Storage and Energy upgrade of low-grade thermal Energy. The operating principle of the proposed Energy Storage system is based on the reversible solid-gas chemical reaction whereby thermal Energy is stored in form of chemical bonds with thermochemical sorption process. A novel thermochemical sorption cycle is proposed to upgrade the stored thermal Energy by using a pressure-reducing desorption method during Energy Storage process and a temperature-lift adsorption technique during Energy release process. Theoretical analysis showed that the proposed target-oriented thermochemical sorption heat transformer is effective for the Integrated Energy Storage and Energy upgrade, and the low-grade thermal Energy can be upgraded from 87 to 171°C using a group of sorption working pair MnCl2-CaCl2-NH3. Moreover, it can give the flexibility of deciding the temperature magnitude of Energy upgrade by choosing appropriate sorption working pairs. © 2012 American Institute of Chemical Engineers AIChE J, 59: 1334–1347, 2013

  • performance analysis of an Integrated Energy Storage and Energy upgrade thermochemical solid gas sorption system for seasonal Storage of solar thermal Energy
    Energy, 2013
    Co-Authors: T. X. Li, Jeremiah K. Kiplagat, R Z Wang, Yong Tae Kang
    Abstract:

    An innovative dual-mode thermochemical sorption Energy Storage method is proposed for seasonal Storage of solar thermal Energy with little heat losses. During the charging phase in summer, solar thermal Energy is stored in form of chemical bonds resulting from thermochemical decomposition process, which enables the stored Energy to be kept several months at ambient temperature. During the discharging phase in winter, the stored thermal Energy is released in the form of chemical reaction heat resulting from thermochemical synthesis process. Thermodynamic analysis showed that the advanced dual-mode thermochemical sorption Energy Storage is an effective method for the long-term seasonal Storage of solar Energy. A coefficient of performance (COPh) of 0.6 and Energy density higher than 1000 kJ/kg of salt can be attained from the proposed system. During the discharging phase at low ambient temperatures, the stored thermal Energy can be upgraded by use of a solid–gas thermochemical sorption heat transformer cycle. The proposed thermochemical sorption Energy Storage has distinct advantages over the conventional sensible heat and latent heat Storage, such as higher Energy Storage density, little heat losses, Integrated Energy Storage and Energy upgrade, and thus it can contribute to improve the seasonal utilization of solar thermal Energy.

Ruzhu Wang - One of the best experts on this subject based on the ideXlab platform.

  • Performance analysis of an Integrated Energy Storage and Energy upgrade thermochemical solid–gas sorption system for seasonal Storage of solar thermal Energy
    Energy, 2013
    Co-Authors: Ruzhu Wang, J.k. Kiplagat, Yong Tae Kang
    Abstract:

    Abstract An innovative dual-mode thermochemical sorption Energy Storage method is proposed for seasonal Storage of solar thermal Energy with little heat losses. During the charging phase in summer, solar thermal Energy is stored in form of chemical bonds resulting from thermochemical decomposition process, which enables the stored Energy to be kept several months at ambient temperature. During the discharging phase in winter, the stored thermal Energy is released in the form of chemical reaction heat resulting from thermochemical synthesis process. Thermodynamic analysis showed that the advanced dual-mode thermochemical sorption Energy Storage is an effective method for the long-term seasonal Storage of solar Energy. A coefficient of performance (COPh) of 0.6 and Energy density higher than 1000 kJ/kg of salt can be attained from the proposed system. During the discharging phase at low ambient temperatures, the stored thermal Energy can be upgraded by use of a solid–gas thermochemical sorption heat transformer cycle. The proposed thermochemical sorption Energy Storage has distinct advantages over the conventional sensible heat and latent heat Storage, such as higher Energy Storage density, little heat losses, Integrated Energy Storage and Energy upgrade, and thus it can contribute to improve the seasonal utilization of solar thermal Energy.

  • A target‐oriented solid‐gas thermochemical sorption heat transformer for Integrated Energy Storage and Energy upgrade
    AIChE Journal, 2012
    Co-Authors: Ruzhu Wang, J.k. Kiplagat
    Abstract:

    An innovative target-oriented solid-gas thermochemical sorption heat transformer is developed for the Integrated Energy Storage and Energy upgrade of low-grade thermal Energy. The operating principle of the proposed Energy Storage system is based on the reversible solid-gas chemical reaction whereby thermal Energy is stored in form of chemical bonds with thermochemical sorption process. A novel thermochemical sorption cycle is proposed to upgrade the stored thermal Energy by using a pressure-reducing desorption method during Energy Storage process and a temperature-lift adsorption technique during Energy release process. Theoretical analysis showed that the proposed target-oriented thermochemical sorption heat transformer is effective for the Integrated Energy Storage and Energy upgrade, and the low-grade thermal Energy can be upgraded from 87 to 171°C using a group of sorption working pair MnCl2-CaCl2-NH3. Moreover, it can give the flexibility of deciding the temperature magnitude of Energy upgrade by choosing appropriate sorption working pairs. © 2012 American Institute of Chemical Engineers AIChE J, 59: 1334–1347, 2013

Drazen Dujic - One of the best experts on this subject based on the ideXlab platform.

  • Power Supply System with Integrated Energy Storage for Superconducting Magnets
    2018
    Co-Authors: Maria Papamichali, Emilien Coulinge, Francisco Daniel Freijedo Fernández, Drazen Dujic
    Abstract:

    To achieve higher collision rate of particle beams, CERN Large Hadron Collider requires new superconducting magnets and associated power supplies at the interaction points for its High-Luminosity upgrade. A new family of two-quadrant converters with Integrated Energy Storage is studied in order to increase the system availability and Energy efficiency. This paper describes topological implemen- tation with an Energy Storage solution based on supercapacitor, considering real operating cycle and superconducting magnet parameters. Power supply control and Energy management considerations are presented and verified through simulations of a complete system, providing insight for the future design of the system.

  • High-current low-voltage power supplies for superconducting magnets
    2017 International Symposium on Power Electronics (Ee), 2017
    Co-Authors: Emilien Coulinge, Jean-paul Burnet, Drazen Dujic
    Abstract:

    In a synchrotron accelerator, the beam trajectory is controlled thanks to magnets, where superconducting technology allows to generate very strong magnetic fields. This was a key element in the construction of the Large Hadron Collider (LHC), the world largest accelerator. Such magnets need special power supplies providing very high DC current under low voltage. In the frame of High Luminosity-LHC (HL-LHC), stronger superconducting magnets are developed and require enhanced supplies. This article reviews the present power supply topologies and introduces new concepts: HL-LHC project offers an opportunity for upgraded system, increased operational performances as well as Integrated Energy Storage to recover Energy from the superconducting magnets.