JP2013191585A5 - - Google Patents

Claims (8)

A solid oxide fuel cell that generates electricity by electrochemically reacting a fuel gas and an oxidant gas,
A solid oxide fuel cell disposed in the fuel cell module;
A reformer that reforms a fuel gas into hydrogen and supplies the fuel cell to the fuel cell, SR, which is a reforming reaction in which the fuel gas is steam-reformed by chemically reacting the fuel gas and steam, and a predetermined amount POX, which is a reforming reaction in which the fuel gas is partially oxidized and reformed by chemically reacting the fuel gas and the oxidant gas in accordance with the temperature range, and the SR are used in combination to improve the autothermal reforming of the fuel gas. The reformer disposed in the fuel cell module, which reforms the fuel gas by ATR which is a quality reaction;
Temperature detecting means arranged in the fuel cell module for detecting the temperature in the fuel cell module;
Control means comprising: start control means for controlling start of operation of the fuel cell module; and stop control means for controlling stop of operation of the fuel cell module;
When the temperature detected by the temperature detecting means is within an ATR temperature band lower than a predetermined steady temperature, the start control means executes ATR during normal start to raise the temperature of the reformer. When the temperature detected by the temperature detection means is equal to or higher than the predetermined steady temperature, the SR at the normal start-up is executed to raise the temperature of the reformer,
Further, when the fuel cell module is stopped from the high temperature state, a stop process is executed by the stop control unit, and when the restart of operation is executed within the ATR temperature band, When the temperature detected by the temperature detecting means is lower than a predetermined temperature in the ATR temperature band at the normal startup, the ATR restart control is executed, and when the temperature is equal to or higher than the predetermined temperature in the ATR temperature band. Is a solid oxide fuel cell characterized by skipping the ATR during normal startup and executing the restart control by the SR. 2. The solid oxide fuel cell according to claim 1, wherein the SR performed by the restart control is configured to increase the amount of fuel gas supplied compared to the SR at the time of normal startup. 3. The solid oxide fuel cell according to claim 1, wherein the SR performed by the restart control is configured to reduce the amount of water supplied compared to the SR at the time of normal startup. 2. The solid oxide fuel cell according to claim 1, wherein the SR performed by the restart control is changed to an SR at the time of normal startup when the reformed state temperature rises by a predetermined temperature or more. 2. The solid oxide fuel cell according to claim 1, wherein the restart control performs restart by SR while maintaining a constant amount without changing a predetermined fuel gas supply amount and water supply amount. Furthermore, it has water supply means for generating pure water and supplying it to the reformer, and the water supply means includes a water pipe for introducing water into the reformer, and a heat retaining means for keeping the water pipe warm. The solid oxide fuel cell according to any one of claims 1 to 5 , further comprising: Furthermore, cell assembly support means for supporting the lower part of a cell assembly including a plurality of fuel cells and forming an exhaust gas chamber in which exhaust gas generated by combustion of fuel gas and oxidant gas is discharged. a, the heat insulating means, by arranging the water pipe so as to through the chamber the exhaust gas, according to claim 6, wherein being configured to suppress a temperature drop of the water supplied to the reformer Solid oxide fuel cell. Furthermore, a housing member that accommodates the cell assembly is provided. Exhaust gas passages that communicate with the exhaust gas chamber are disposed on a pair of opposed side surfaces that form the housing member, and the water pipe is disposed on the other side surface. The solid oxide fuel cell according to claim 6 , wherein the passage is disposed.