Patent ID: 11964251
Assignee: SAWAFUJI ELECTRIC CO., LTD.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC B  C  F  Y | IPC B  C  F

Claim 0:
1. 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 having a hydrogen content of 99% or more;
a mixing tank configured to temporarily store a mixed gas of mixed ammonia and the high-concentration hydrogen gas and supply the mixed gas as a fuel gas to the combustion device; and
a control means configured to control respective supply amounts of ammonia and the high-concentration hydrogen gas that are supplied to the mixing tank, and an amount of mixed gas delivered to the combustion device,
wherein the control means stores combustion rates of a reference fuel used in the combustion device, hydrogen, and ammonia, and calculates a combustion rate coefficient C of the mixed gas with respect to the reference fuel on the basis of equation (1)

[Math 1]

S0=SH×C+SA×(1−C)  Equation (1):

where S0 is the combustion rate of the reference fuel, SH is the combustion rate of hydrogen, SA is the combustion rate of ammonia, and C is the combustion rate coefficient of the mixed gas,
in addition, on the basis of equation (2), the control means determines volume fractions of ammonia and hydrogen that are supplied to the mixing tank

[Math 2]

C=1−exp(−A×MB)  Equation (2):

where M is the volume fraction of hydrogen in mixed gas, and A and B are constants.