Combustion Gas Temperature Estimation Device, Heat Transfer Surface Evaluation Device, Control Device, Combustion Gas Temperature Estimation Method, Heat Transfer Surface Evaluation Method, And Heat Transfer Surface Management Method

Abstract: This combustion gas temperature estimation device estimates the temperature of combustion gas supplied to at least one heat transfer surface for heat exchange with steam. This device calculates the inlet-side combustion gas enthalpy of combustion gas at the inlet side of the heat transfer surface by calculating the amount of change in the enthalpy of combustion gas on the heat transfer surface on the basis of the amount of heat absorption of steam on the heat transfer surface and the combustion gas flow rate and adding the enthalpy change amount to the enthalpy corresponding to the outlet-side combustion gas temperature. Based on the inlet-side combustion gas enthalpy calculated in this way, the inlet-side combustion gas temperature of the heat transfer surface is calculated.

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