| 摘要 |
The object of the invention is an arrangement comprising means (120) for providing enthalpy balance information of the fuel cell system on the basis of information of enthalpy flows accomplished by utilizing enthalpy feed in flow information provided by one or more of following means: means (122) for performing air feed in measurements to form air feed in information, means (124) for performing water flow in measurements to form water flow in information, means (126) for providing exhaust feed out information, means (128) for measuring to form electrical power production information, means (130) for measuring to form heating information of the fuel cell system, and means (134) for determining heat loss information of the fuel cell system. The arrangement comprises said means (120) for determining enthalpy balance of the fuel cell system by detecting that sum of summed information of enthalpy flows is zero or essentially near to zero, and means (136) for determining methane content information of the fuel feed on the basis of said provided enthalpy balance information. |
