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Boiler horsepower (BHP) is a measure of the rate at which energy is transferred from a boiler to produce steam. It is equal to 33,475 BTU/hour (British Thermal Units per hour), or 9.81055407 kW (Kilowatts). The output of a boiler is often expressed in boiler horsepower, which can be converted to pounds of steam per hour. To convert boiler horsepower to pounds of steam per hour, we must first determine the specific heat of the steam being produced.

The specific heat of steam is the amount of energy required to raise the temperature of one pound of water by one degree Fahrenheit. It is usually expressed in BTU/lb/°F. The specific heat of steam varies depending on the pressure and temperature of the steam. For most industrial applications, the specific heat of steam is 0.12 BTU/lb/°F.

To convert boiler horsepower to pounds of steam per hour, we must first calculate the evaporation rate of the boiler. The evaporation rate is the amount of water that is evaporated in a given amount of time, usually expressed in pounds of water per hour. The evaporation rate can be calculated by dividing the boiler horsepower by the specific heat of the steam.

Once the evaporation rate is known, the pounds of steam per hour can be calculated by multiplying the evaporation rate by the latent heat of steam. The latent heat of steam is the amount of energy required to convert one pound of water into steam. It is usually expressed in BTU/lb. The latent heat of steam varies depending on the pressure and temperature of the steam. For most industrial applications, the latent heat of steam is 970 BTU/lb.

Therefore, to convert boiler horsepower to pounds of steam per hour, the following equation can be used:

Pounds of Steam Per Hour = Boiler Horsepower (BHP) x Evaporation Rate (lb/hr) x Latent Heat of Steam (BTU/lb)

For example, if the boiler horsepower is 10 BHP and the specific heat of steam is 0.12 BTU/lb/°F, the evaporation rate can be calculated as follows:

Evaporation Rate (lb/hr) = 10 BHP / 0.12 BTU/lb/°F = 83.3 lb/hr

Then, the pounds of steam per hour can be calculated as follows:

Pounds of Steam Per Hour = 10 BHP x 83.3 lb/hr x 970 BTU/lb = 81030 lb/hr

Therefore, 10 BHP is equal to 81030 lb/hr of steam.

It is important to note that the evaporation rate and the latent heat of steam vary depending on the pressure and temperature of the steam. In addition, the specific heat of steam can vary depending on the type of fuel used in the boiler. For example, the specific heat of steam for natural gas is typically higher than that of coal.

To accurately convert boiler horsepower to pounds of steam per hour, it is important to use the correct values for the evaporation rate and the latent heat of steam. In addition, it is important to use the correct value for the specific heat of steam, depending on the type of fuel used in the boiler.