How much total steam load can a steaming economizer generate at full boiler load?

A steaming economizer is designed to recover heat from the flue gas in a boiler system and transfer that heat to the feedwater, effectively allowing for more efficient operation and increased steam production. When considering how much total steam load a steaming economizer can generate at full boiler load, it functions as a supplementary heat exchanger that allows the boiler to achieve better efficiency by utilizing waste heat, resulting in additional steam generation.

In practice, a steaming economizer is capable of supplying around 20% of the total steam load at full boiler capacity. This supplemental steam generation from the economizer not only increases the overall efficiency of the steam cycle but also helps to reduce fuel consumption by recovering energy that would otherwise be lost.

The other percentage options reflect different scenarios not typical for a steaming economizer's performance under full load. For instance, values like 50%, 10%, or 30% do not align with common industry benchmarks for the capability of economizers in steam applications, which makes the 20% figure an accurate representation of their contribution in optimal conditions.