The thermal efficiency of the circulating fluidized bed boiler is higher than the design value
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I would like to ask everyone: has anyone ever encountered a case where the actual thermal efficiency of a circulating fluidized bed boiler was higher than the designed value? It is generally below the design value; is it normal for it to be above the design value?
This is rare; firstly, the boiler operators are highly skilled, and secondly, the coal used is of better quality than what was specified in the design.
The coal cost for the furnace is 4300+; how much coal is typically used in conventional circulating fluidized bed boilers?
1: The design is not accurate enough; there are many heating surfaces arranged, but little calculation has been done. II: Agree with the views of the comrade on the second floor.
The calculation is done on an adiabatic basis; the value is 10184, with coal quality having the greatest influence
Generally, the gas production volume of boilers is greater than the designed efficiency
Is the actual thermal efficiency higher than the designed value? . . . . Is it normal for the value to be higher than the design value? . . . . . It is normal for the actual thermal efficiency to be higher than the designed value! Because the coal quality is good ； This can happen even with highly skilled stokers. But if the measuring instruments are inaccurate, that’s not good. Generally, boiler manufacturers can ensure efficiency at the design stage.
I have encountered this situation as well, but it was in a coal powder furnace; the coal quality was good, the fly ash was very white, and the efficiency obtained from reverse balance calculations was higher than that designed