This paper describes the analysis of a vanadium redox flow battery (VRB) cell with superconductin... more This paper describes the analysis of a vanadium redox flow battery (VRB) cell with superconducting magnet energy storage for solar generation system. A VRB is a type of rechargeable battery where recharge ability is provided by two vanadium redox couples, dissolved in liquids contained within the system and most commonly separated by a membrane. In spite of the large capacity support, the majority of development works has focused on stationary application due to the relatively low energy density of VRB . A superconducting charging system (SCS) operate in cryogenic temperature by a cryostat containing liquid helium or nitrogen. The energy stored in the coil and very quick response with high power peaks can be obtained. In addition, SCS provides high efficiency, since the superconducting coil has virtually without Joule losses. Due to low energy density of VRB, it's not easy to be applied to the Energy Storage System (ESS) which is required quick response time. This paper focuses design and analysis of combined two technologies of electricity storage in order to study the feasibility of very efficient ESS which has quick response time and large capacity simultaneously. This ESS concept will be designed for solar power generation system connected to the grid or independent system respectively.
Experimental investigations are made into the electrical conductivity of suspensions of non-condu... more Experimental investigations are made into the electrical conductivity of suspensions of non-conducting particles of various shapes. Theoretical relations so far available for spheroidal particle systems are tested and the Fricke equation is used for determining particle shape as the aspect ratio of an equivalent spheroid. The electrical conductivities of suspensions of disks and cylindrical particles are obtained experimentally. The effect of the shape distribution on the conductivity of suspensions is also discussed. The TV image processing system2'5) accurately measures particle profiles, but it is two-dimensional and usually restricted to a stable orientation, and shape characterization is time-consuming. Moreover,
This paper describes the analysis of a vanadium redox flow battery (VRB) cell with superconductin... more This paper describes the analysis of a vanadium redox flow battery (VRB) cell with superconducting magnet energy storage for solar generation system. A VRB is a type of rechargeable battery where recharge ability is provided by two vanadium redox couples, dissolved in liquids contained within the system and most commonly separated by a membrane. In spite of the large capacity support, the majority of development works has focused on stationary application due to the relatively low energy density of VRB . A superconducting charging system (SCS) operate in cryogenic temperature by a cryostat containing liquid helium or nitrogen. The energy stored in the coil and very quick response with high power peaks can be obtained. In addition, SCS provides high efficiency, since the superconducting coil has virtually without Joule losses. Due to low energy density of VRB, it's not easy to be applied to the Energy Storage System (ESS) which is required quick response time. This paper focuses design and analysis of combined two technologies of electricity storage in order to study the feasibility of very efficient ESS which has quick response time and large capacity simultaneously. This ESS concept will be designed for solar power generation system connected to the grid or independent system respectively.
Uploads
Papers by Atsuo Ikeuchi