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proportion of boiler water evaporation

What are boiler efficiency and boiler evaporation ratio

Evaporation ratio = quantity of steam generation/quantity of fuel consumed.For example quantity of steam Is 310 ton/hr and fuel is 55 ton/hr then the evaporation ratio is 5.63. Evaporation ratio is also known as steam fuel ratio.A drop in evaporation ratio indicates drop in boiler efficiency.Boiler evaporation ratio depends on fuel quality.

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Boiler Formulas | Johnston Boiler | Top Quality Boiler ...

What is the boiler horsepower of a boiler generating 21500 lbs of steam per hour at 155 psi? The factor of evaporation is 1.08. BHP = (LB/HR*fe)/34.5.

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