What is a common method used to assess the efficiency of a steam boiler?

Monitoring fuel consumption rates is a common method used to assess the efficiency of a steam boiler because it provides valuable data about how much fuel is being used relative to the amount of steam produced. This metric allows engineers to determine the boiler's performance by comparing the fuel input to the steam output over a specified period. A more efficient boiler will use less fuel to produce the same amount of steam, indicating effective energy use and optimal operation.

Other methods can provide insights into specific aspects of the boiler's function, but they may not directly correlate with overall efficiency. For instance, visual inspections can help identify physical issues, while daily temperature measurements may indicate operational status but not necessarily efficiency. Conducting safety drills is essential for operational safety, but it does not relate to assessing fuel efficiency or boiler performance. Therefore, monitoring fuel consumption rates stands out as the most direct and effective method for evaluating a steam boiler's efficiency.