| 摘要 |
An object of the invention is an arrangement, which comprises means (125) for measuring temperature in the afterburner (123) or substantially near the afterburner (123) to form afterburner temperature change information, means (127) for determining information on consumed fuel amount in the fuel cells (103) on the basis of the current information, means for determining information on air amount in the afterburner (123), means (133) for determining residual enthalpy change information on the basis of said afterburner temperature change information, said information on air amount in the afterburner, and on the basis of said information on consumed fuel amount in the fuel cells. The means (120) for obtaining at least one of fuel input enthalpy information and fuel input concentration information on the basis of the determined residual enthalpy change information, said means (120) being configured to determine methane content information of the fuel feed (117) by utilizing said obtained at least one of fuel input enthalpy information and fuel input concentration information. |
