The Experts below are selected from a list of 17340 Experts worldwide ranked by ideXlab platform

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

  • control strategy of the module concrete thermal energy Storage for parabolic trough power plants
    Energy Procedia, 2015
    Co-Authors: Y Jian, Fenglian Bai, Quentin Falcoz, Z Wang
    Abstract:

    Abstract Solid sensible heat Storage is an attractive option for high-temperature Storage applications in terms of investment and maintenance costs. Typical Solid thermal energy Storage systems use a heat transfer fluid to transfer heat as the fluid flows through a tubular heat exchanger embedded in the Solid Storage Material. A one-dimensional unsteady model is developed using the modified lumped capacitance method for a Solid cylindrical heat Storage unit. A modular charging/discharging control strategy is proposed to improve utilization of the Solid Storage Material. The control strategy of modular charging/discharging using two modules could increase the Storage Material utilization from 33.4% to 38%.

  • Design and optimization of Solid thermal energy Storage modules for solar thermal power plant applications
    Applied Energy, 2015
    Co-Authors: Y Jian, Quentin Falcoz, Pierre Neveu, Fengwu Bai, Yan Wang, Z Wang
    Abstract:

    Solid sensible heat Storage is an attractive option for high-temperature Storage applications in terms of investment and maintenance costs. Typical Solid thermal energy Storage systems use a heat transfer fluid to exchange heat as the fluid flows through a tubular heat exchanger embedded in the Solid Storage Material. The modified lumped capacitance method is used with an effective heat transfer coefficient in a simplified analysis of the heat transfer in Solid thermal energy Storage systems for a Solid cylindrical heat Storage unit. The analytical solution was found using the Laplace transform method. The solution was then used to develop an optimization method for designing Solid Storage modules which uses the system requirements (released energy and fluid outlet temperature) as the constraint conditions and the Storage module cost as the objective function for the optimization. Optimized results are then given for many kinds of system configurations.

Matthias Hempel - One of the best experts on this subject based on the ideXlab platform.

  • High-Temperature Solid-Media Thermal Energy Storage for Solar Thermal Power Plants
    Proceedings of the IEEE, 2012
    Co-Authors: Doerte Laing, Carsten Bahl, Michael Fiß, Nils Breidenbach, Thomas Bauer, Matthias Hempel
    Abstract:

    Solid sensible heat Storage is an attractive option for high-temperature Storage applications regarding investment and maintenance costs. Using concrete as Solid Storage Material is most suitable, as it is easy to handle, the major aggregates are available all over the world, and there are no environmentally critical components. Long-term stability of concrete has been proven in oven experiments and through strength measurements up to 500 °C. Material parameters and Storage performance have been validated in a 20-m3 test module with more than 23 months of operation between 200 °C and 400 °C and more than 370 thermal cycles. For an up-scaled concrete Storage design with 1100-MWh capacity in a modular setup for a 50 MWel parabolic trough power plant of the ANDASOL-type, about 50 000 m3 of concrete is required and the investment costs are approximately 38 million euro. The simulation of the annual electricity generation of a 50 MWel parabolic trough power plant with a 1100-MWh concrete Storage illustrates that such plants can operate in southern Europe delivering about 3500 full load hours annually; about 30% of this electricity would be generated by the Storage system. This number will increase further, when improved operation strategies are applied. Approaches for further cost reduction using heat transfer structures with high thermal conductivity inside the concrete are analyzed, leading to a 60% reduction in the number of heat exchanger pipes required. For implementation of the structures, the Storage is build up of precast concrete blocks.

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

  • control strategy of the module concrete thermal energy Storage for parabolic trough power plants
    Energy Procedia, 2015
    Co-Authors: Y Jian, Fenglian Bai, Quentin Falcoz, Z Wang
    Abstract:

    Abstract Solid sensible heat Storage is an attractive option for high-temperature Storage applications in terms of investment and maintenance costs. Typical Solid thermal energy Storage systems use a heat transfer fluid to transfer heat as the fluid flows through a tubular heat exchanger embedded in the Solid Storage Material. A one-dimensional unsteady model is developed using the modified lumped capacitance method for a Solid cylindrical heat Storage unit. A modular charging/discharging control strategy is proposed to improve utilization of the Solid Storage Material. The control strategy of modular charging/discharging using two modules could increase the Storage Material utilization from 33.4% to 38%.

  • Design and optimization of Solid thermal energy Storage modules for solar thermal power plant applications
    Applied Energy, 2015
    Co-Authors: Y Jian, Quentin Falcoz, Pierre Neveu, Fengwu Bai, Yan Wang, Z Wang
    Abstract:

    Solid sensible heat Storage is an attractive option for high-temperature Storage applications in terms of investment and maintenance costs. Typical Solid thermal energy Storage systems use a heat transfer fluid to exchange heat as the fluid flows through a tubular heat exchanger embedded in the Solid Storage Material. The modified lumped capacitance method is used with an effective heat transfer coefficient in a simplified analysis of the heat transfer in Solid thermal energy Storage systems for a Solid cylindrical heat Storage unit. The analytical solution was found using the Laplace transform method. The solution was then used to develop an optimization method for designing Solid Storage modules which uses the system requirements (released energy and fluid outlet temperature) as the constraint conditions and the Storage module cost as the objective function for the optimization. Optimized results are then given for many kinds of system configurations.

Doerte Laing - One of the best experts on this subject based on the ideXlab platform.

  • development of the cellflux Storage concept for sensible heat
    Journal of Solar Energy Engineering-transactions of The Asme, 2014
    Co-Authors: Wolfdieter Steinmann, Doerte Laing, Christian Odenthal
    Abstract:

    Two tank Storage systems using molten salt represent today's state of the art in energy Storage for concentrating solar power (CSP) plants. This concept shows a limited potential for further cost reductions, since the capital costs are dominated by the expenses for the salt inventory. The application of Solid Storage Materials represents a promising approach to reduce capital costs. While this approach avoids also the risk of freezing and lessens corrosion problems, the efficiency of the heat transfer between the heat transfer fluid (HTF) and the Solid Storage medium is crucial. This paper introduces the CellFlux concept, which uses an intermediate closed air loop to transfer energy between the HTF and the Solid Storage Material. A modular concept is chosen to optimize the size of the air flow channels. An initial project will provide the fundamentals needed to design a CellFlux Storage unit. The feasibility will be proven by a 100 kW/500 kWh pilot Storage module.

  • High-Temperature Solid-Media Thermal Energy Storage for Solar Thermal Power Plants
    Proceedings of the IEEE, 2012
    Co-Authors: Doerte Laing, Carsten Bahl, Michael Fiß, Nils Breidenbach, Thomas Bauer, Matthias Hempel
    Abstract:

    Solid sensible heat Storage is an attractive option for high-temperature Storage applications regarding investment and maintenance costs. Using concrete as Solid Storage Material is most suitable, as it is easy to handle, the major aggregates are available all over the world, and there are no environmentally critical components. Long-term stability of concrete has been proven in oven experiments and through strength measurements up to 500 °C. Material parameters and Storage performance have been validated in a 20-m3 test module with more than 23 months of operation between 200 °C and 400 °C and more than 370 thermal cycles. For an up-scaled concrete Storage design with 1100-MWh capacity in a modular setup for a 50 MWel parabolic trough power plant of the ANDASOL-type, about 50 000 m3 of concrete is required and the investment costs are approximately 38 million euro. The simulation of the annual electricity generation of a 50 MWel parabolic trough power plant with a 1100-MWh concrete Storage illustrates that such plants can operate in southern Europe delivering about 3500 full load hours annually; about 30% of this electricity would be generated by the Storage system. This number will increase further, when improved operation strategies are applied. Approaches for further cost reduction using heat transfer structures with high thermal conductivity inside the concrete are analyzed, leading to a 60% reduction in the number of heat exchanger pipes required. For implementation of the structures, the Storage is build up of precast concrete blocks.

Quentin Falcoz - One of the best experts on this subject based on the ideXlab platform.

  • control strategy of the module concrete thermal energy Storage for parabolic trough power plants
    Energy Procedia, 2015
    Co-Authors: Y Jian, Fenglian Bai, Quentin Falcoz, Z Wang
    Abstract:

    Abstract Solid sensible heat Storage is an attractive option for high-temperature Storage applications in terms of investment and maintenance costs. Typical Solid thermal energy Storage systems use a heat transfer fluid to transfer heat as the fluid flows through a tubular heat exchanger embedded in the Solid Storage Material. A one-dimensional unsteady model is developed using the modified lumped capacitance method for a Solid cylindrical heat Storage unit. A modular charging/discharging control strategy is proposed to improve utilization of the Solid Storage Material. The control strategy of modular charging/discharging using two modules could increase the Storage Material utilization from 33.4% to 38%.

  • Design and optimization of Solid thermal energy Storage modules for solar thermal power plant applications
    Applied Energy, 2015
    Co-Authors: Y Jian, Quentin Falcoz, Pierre Neveu, Fengwu Bai, Yan Wang, Z Wang
    Abstract:

    Solid sensible heat Storage is an attractive option for high-temperature Storage applications in terms of investment and maintenance costs. Typical Solid thermal energy Storage systems use a heat transfer fluid to exchange heat as the fluid flows through a tubular heat exchanger embedded in the Solid Storage Material. The modified lumped capacitance method is used with an effective heat transfer coefficient in a simplified analysis of the heat transfer in Solid thermal energy Storage systems for a Solid cylindrical heat Storage unit. The analytical solution was found using the Laplace transform method. The solution was then used to develop an optimization method for designing Solid Storage modules which uses the system requirements (released energy and fluid outlet temperature) as the constraint conditions and the Storage module cost as the objective function for the optimization. Optimized results are then given for many kinds of system configurations.