The standard for 1 boiler horsepower (bhp) is based on the evaporation of how many pounds of water from and at 212°F?

The standard for one boiler horsepower (bhp) is defined as the ability to evaporate 34.5 pounds of water from and at 212°F per hour. This definition is widely accepted in the industry and serves as a benchmark for measuring the capacity of steam boilers.

Understanding the concept of boiler horsepower is crucial for engineers and operators, as it allows them to evaluate the performance and efficiency of boilers accurately. The unit of boiler horsepower is essential when sizing equipment, ensuring that sufficient steam capacity is available for heating or process requirements.

The figure of 34.5 pounds reflects the energy required not only to heat the water to a boil but also to convert it into steam at that temperature, which is critical for various applications within steam systems. This additional context highlights why this specific number is the standard, emphasizing the relationship between heat energy and steam generation in a boiler system.