Power generation system and operating method thereof
AssigneeMitsubishi Heavy Industries, Ltd.
InventorHiroyuki OZAWA
Life of this patent
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Abstract
A power generation system has a fuel cell, a gas turbine, an exhausted oxidant line, a fuel gas supply line, an exhausted fuel gas supply line, a supply amount adjustment unit, and a control system including an information acquisition unit, a calculation unit, and a fuel gas supply control unit. The information acquisition unit acquires an output command of the gas turbine, an atmospheric temperature, a temperature of the exhausted oxidant supplied to the gas turbine, and a temperature of the exhausted fuel gas supplied to the gas turbine. The calculation unit calculates a heat input of the exhausted oxidant, calculates a heat input of the exhausted fuel gas, and calculates by the output command and the atmospheric temperature to calculate a gas turbine heat input command.
Claims8
A power generation system comprising:
- a fuel cell;
- a gas turbine including a combustor;
- an exhausted oxidant line that supplies exhausted oxidant from the fuel cell to the combustor;
- a fuel gas supply line that supplies fuel gas to the combustor;
- an exhausted fuel gas supply line that supplies exhausted fuel gas from the fuel cell to the combustor;
- a supply amount adjustment unit that adjust an amount of the fuel gas supplied from the fuel gas supply line to the combustor;
- and
- a control system including an information acquisition unit that acquires information from each unit, an calculation unit that executes an calculation process using the information acquired by the information acquisition unit, and a fuel gas supply control unit that controls the supply amount adjustment unit using a result operated by the calculation unit and controls a flow rate of fuel gas supplied to the gas turbine,
- wherein the information acquisition unit acquires an output command of the gas turbine, an atmospheric temperature, a temperature of the exhausted oxidant supplied to the gas turbine, and a temperature of the exhausted fuel gas supplied to the gas turbine, and
- the calculation unit calculates a heat input of the exhausted oxidant using at least the temperature of the exhausted oxidant, calculates a heat input of the exhausted fuel gas by an calculation using at least the temperature of the exhausted fuel gas, calculates using the output command and the atmospheric temperature to calculate a gas turbine heat input command, executes an calculation by the gas turbine heat input command and the heat input of the exhausted oxidant to calculate a gas turbine fuel heat input command, and executes an calculation by the gas turbine fuel heat input command and the heat input of the exhausted fuel gas to calculate a supply amount of the fuel gas.
An operating method of a power generation system including a fuel cell, a gas turbine including a combustor, an exhausted oxidant line supplying exhausted oxidant from the fuel cell to the combustor, a fuel gas supply line supplying fuel gas to the combustor, an exhausted fuel gas supply line supplying exhausted fuel gas from the fuel cell to the combustor, and a supply amount adjustment unit adjusting an amount of the fuel gas supplied from the fuel gas supply line to the combustor, the operating method comprising:
- a process for acquiring an output command of the gas turbine, an atmospheric temperature, a temperature of the exhausted oxidant supplied to the gas turbine, and a temperature of the exhausted fuel gas supplied to the gas turbine;
- a process for calculating a heat input of the exhausted oxidant using at least the temperature of the exhausted oxidant and calculating a heat input of the exhausted fuel gas using at least the temperature of the exhausted fuel gas;
- a process for calculating by the output command and the atmospheric temperature to calculate a gas turbine heat input command;
- a process for calculating by the gas turbine heat input command and the heat input of the exhausted oxidant to calculate a gas turbine fuel heat input command;
- a process for calculating by the gas turbine fuel heat input command and the heat input of the exhausted fuel gas to calculate a supply amount of the fuel gas;
- and
- a process for controlling the supply amount adjustment unit on the basis of the calculated supply amount of the fuel gas.
Dependencies are inferred from the claim text.