Boiler steam amount measuring method, boiler load analyzing method, boiler steam amount measuring apparatus, and boiler load analyzing apparatus

A boiler steam amount measuring apparatus configured to continuously measure a temporal change in an amount of steam from a steam boiler, comprising:

• a differential pressure detecting unit configured to measure a differential pressure between a pressure at a first detection position that is a predetermined position in a can body of the steam boiler or a steam outflow path of the steam boiler, and a pressure at a second detection position in the steam outflow path separated from the first detection position toward a downstream side of the steam boiler;
• and
• a controller configured to perform first calculating a pressure loss coefficient based on the differential pressure measured by flowing a predetermined flow rate of steam or fluid instead of steam into the steam outflow path, and the predetermined flow rate, and second calculating continuously the amount of steam based on the differential pressure measured by the differential pressure detecting unit and the pressure loss coefficient calculated in the first calculating to output the calculated amount of steam as a measurement value.