Abstract: A method for predicting consumer power demand uses power consumption data measured over a long term and a power usage pattern immediately before a target time and for controlling ESS charge/discharge of an ESS based on the predicted power demand. A power demand prediction apparatus using the method includes respective components for collecting weather data and data on power used by the consumer; selecting data points according to a preset condition from among data collected by the data collector based on a specific time span; generating long term prediction data for the power demand in the specific time span based on the selected data points; analyzing a power usage pattern immediately before the specific time span and comparing the power usage pattern with the long-term prediction data, to determine whether prediction data correction is required; and correcting the prediction data based on the power usage pattern when correction is required.

Abstract: The present disclosure relates to a redox flow battery using an electrolyte concentration gradient, capable of increasing the efficiency of the redox flow battery, and to an operation method thereof. The redox flow battery includes a catholyte tank having an electrolyte inlet at the top thereof and an electrolyte outlet at the bottom thereof and having a partition plate for forming a concentration gradient of a catholyte received therein, an anolyte tank having an electrolyte inlet at the top thereof and an electrolyte outlet at the bottom thereof and having a partition plate for forming a concentration gradient of an anolyte received therein, and a stack for charging and discharging power by receiving the catholyte and the anolyte supplied from the catholyte tank and the anolyte tank.

Abstract: An energy storage system includes one or more new and renewable energy power stations generating power with a new or renewable energy source, and an energy storage facility including a plurality of energy storage apparatuses to be charged by one of an external power grid supplying power to a power load and the one or more new and renewable energy power stations, and to be discharged to supply the power to the power load, wherein the plurality of energy storage apparatuses have different charging and/or discharging periods.

Abstract: Disclosed is a method for producing a cylindrical membrane wall including a plurality of tubes having a coolant passing through an inner part thereof. The method includes producing a plurality of sub-bundles by welding a plurality of tubes to each other after longitudinally arranging the tubes to be adjacent to each other in parallel, producing a plurality of panel-type bundles by welding the sub-bundles to each other, forming a plurality of curved bundles having a curved surface of a predetermined curvature by pressing the panel-type bundles, and welding the curved bundles to each other using a jig.

Abstract: The present disclosure relates to a redox flow battery using an electrolyte concentration gradient, capable of increasing the efficiency of the redox flow battery, and to an operation method thereof. The redox flow battery includes a catholyte tank having an electrolyte inlet at the top thereof and an electrolyte outlet at the bottom thereof and having a partition plate for forming a concentration gradient of a catholyte received therein, an anolyte tank having an electrolyte inlet at the top thereof and an electrolyte outlet at the bottom thereof and having a partition plate for forming a concentration gradient of an anolyte received therein, and a stack for charging and discharging power by receiving the catholyte and the anolyte supplied from the catholyte tank and the anolyte tank.

Abstract: A method for managing power of an energy storage system (ESS) connected to renewable energy, the ESS including an energy storage device connected to a power grid, a battery management system (BMS), a power conditioning system (PCS), and one or more renewable energy generation facilities producing electric energy from renewable energy, the steps including of determining a predicted power consumption amount of a power load and a predicted power production amount of the renewable energy generation facility, predicting power production of the renewable energy generation facility based on the stored type and characteristics information of the renewable energy generation facilities, determining whether the energy storage device is fully charged with the power production from the renewable energy generation facility, and controlling charging/discharging operation of the energy storage device according to a charge/discharge schedule.

Abstract: A method for predicting consumer power demand uses power consumption data measured over a long term and a power usage pattern immediately before a target time and for controlling ESS charge/discharge of an ESS based on the predicted power demand. A power demand prediction apparatus using the method includes respective components for collecting weather data and data on power used by the consumer; selecting data points according to a preset condition from among data collected by the data collector based on a specific time span; generating long term prediction data for the power demand in the specific time span based on the selected data points; analyzing a power usage pattern immediately before the specific time span and comparing the power usage pattern with the long-term prediction data, to determine whether prediction data correction is required; and correcting the prediction data based on the power usage pattern when correction is required.

Abstract: A method for managing power of an energy storage system (ESS) connected to renewable energy, the ESS including an energy storage device connected to a power grid, a battery management system (BMS), a power conditioning system (PCS), and one or more renewable energy generation facilities producing electric energy from renewable energy, the steps including of determining a predicted power consumption amount of a power load and a predicted power production amount of the renewable energy generation facility, predicting power production of the renewable energy generation facility based on the stored type and characteristics information of the renewable energy generation facilities, determining whether the energy storage device is fully charged with the power production from the renewable energy generation facility, and controlling charging/discharging operation of the energy storage device according to a charge/discharge schedule.

Abstract: An energy storage system includes one or more new and renewable energy power stations generating power with a new or renewable energy source, and an energy storage facility including a plurality of energy storage apparatuses to be charged by one of an external power grid supplying power to a power load and the one or more new and renewable energy power stations, and to be discharged to supply the power to the power load, wherein the plurality of energy storage apparatuses have different charging and/or discharging periods.

Abstract: Disclosed is a method for producing a cylindrical membrane wall including a plurality of tubes having a coolant passing through an inner part thereof. The method includes producing a plurality of sub-bundles by welding a plurality of tubes to each other after longitudinally arranging the tubes to be adjacent to each other in parallel, producing a plurality of panel-type bundles by welding the sub-bundles to each other, forming a plurality of curved bundles having a curved surface of a predetermined curvature by pressing the panel-type bundles, and welding the curved bundles to each other using a jig.