Hydrogen generator and fuel cell system

A fuel cell system comprising:

• a reformer which generates a hydrogen-containing gas from a source gas and reforming water;
• a fuel cell which generates power from the hydrogen-containing gas and an oxidant gas;
• an exhaust gas channel through which an exhaust gas emitted from the fuel cell flows;
• a condensed water channel through which condensed water generated by cooling of the exhaust gas flows;
• a circulating water channel through which circulating water flows;
• an ion exchange resin filter which is provided to the circulating water channel and deionizes the circulating water;
• a reservoir tank which includes a first reservoir provided to the condensed water channel and a second reservoir provided to the circulating water channel;
• a first communicator through which the first and second reservoirs are in communication with each other;
• and
• a reforming water channel which extends from a junction of the circulating water channel and supplies the circulating water as reforming water to the reformer, wherein
• the first reservoir has a first inlet from which the condensed water flows into the first reservoir and a first outlet from which the condensed water overflows to the outside of the reservoir tank,
• the second reservoir has a second inlet from which the circulating water flows into the second reservoir and a second outlet of which the circulating water flows out of the second reservoir,
• the condensed water channel is connected only to the first reservoir out of the first and second reservoirs,
• the first communicator is provided below the first outlet, and
• the reservoir tank is configured such that the pressure in the inner space of the first reservoir is maintained to be the same as the pressure in the inner space of the second reservoir.

A fuel cell system comprising:

• a reformer which generates a hydrogen-containing gas from a source gas and reforming water;
• a solid oxide fuel cell which generates power from the hydrogen-containing gas and an oxidant gas;
• an exhaust gas channel through which an exhaust gas emitted from the solid oxide fuel cell flows;
• a condensed water channel through which condensed water generated by cooling of the exhaust gas flows;
• a circulating water channel through which circulating water flows;
• a first heat exchanger which is provided to the exhaust gas channel and the circulating water channel and in which the exhaust gas and the circulating water exchange heat;
• an ion exchange resin filter which is provided to the circulating water channel and deionizes the circulating water;
• a second heat exchanger which is provided to the circulating water channel and in which the circulating water and stored water exchange heat;
• a reservoir tank which includes a first reservoir provided to the condensed water channel and a second reservoir provided to the circulating water channel;
• a first communicator through which the first and second reservoirs are in communication with each other;
• and
• a reforming water channel which extends from a junction of the circulating water channel and supplies the circulating water as reforming water to the reformer, wherein
• the first reservoir has a first inlet from which the condensed water flows into the first reservoir and a first outlet from which the condensed water overflows to the outside of the reservoir tank,
• the second reservoir has a second inlet from which the circulating water flows into the second reservoir and a second outlet of which the circulating water flows out of the second reservoir,
• the first communicator is provided below the first outlet, and
• the reservoir tank is configured such that the pressure in the inner space of the first reservoir is maintained to be the same as the pressure in the inner space of the second reservoir.