Fuel-reforming device and fuel-reforming method

A fuel-reforming method for supplying a fuel gas containing ammonia and hydrogen to a combustion device, the fuel-reforming method comprising:

• determining mixing fractions of ammonia and hydrogen;
• supplying the ammonia from an ammonia tank to a mixing tank via a first ammonia supply path;
• supplying the ammonia from the ammonia tank to a reformer via a second ammonia supply path separated from the first ammonia supply path;
• reforming the ammonia supplied through the second ammonia supply path in the reformer to generate a high-concentration hydrogen gas;
• making mixed gas in the mixing tank by mixing the ammonia via the first ammonia supply path and the high-concentration hydrogen gas;
• and
• supplying the mixed gas to the combustion device, based on values of a combustion rate and a high heating value requested by the combustion device.

A fuel-reforming device to supply a fuel gas containing ammonia and hydrogen to a combustion device, the fuel-reforming device comprising:

• an ammonia tank;
• a reformer configured to reform ammonia and generate high-concentration hydrogen gas;
• a mixing tank configured to temporarily store a mixed gas and supply the mixed gas as a fuel gas to the combustion device, the mixed gas being a mixture of low-concentration hydrogen gas generated by decomposing a part of ammonia supplied from the ammonia tank via a first ammonia supply path and the high-concentration hydrogen gas generated in the reformer by reforming ammonia supplied from the ammonia tank to the reformer via a second ammonia supply path separated from the first ammonia supply path;
• and
• a controller configured to control respective supply amounts of the low-concentration hydrogen gas and the high-concentration hydrogen gas to be supplied to the mixing tank, and to control an amount of the mixed gas to be delivered to the combustion device, based on values of a combustion rate and a high heating value requested by the combustion device.

A fuel-reforming method for supplying a fuel gas containing ammonia and hydrogen to a combustion device, the fuel-reforming method comprising:

• determining mixing fractions of ammonia and hydrogen;
• decomposing a part of ammonia supplied from an ammonia tank via a first ammonia supply path to generate low-concentration hydrogen gas;
• supplying the ammonia from the ammonia tank to a reformer via a second ammonia supply path separated from the first ammonia supply path;
• reforming the ammonia supplied through the second ammonia supply path in the reformer to generate a high-concentration hydrogen gas;
• making mixed gas in a mixing tank by mixing the low-concentration hydrogen gas and the high-concentration hydrogen gas;
• and
• supplying the mixed gas to the combustion device, based on values of a combustion rate and a high heating value requested by the combustion device.