Which method is used for monitoring the efficiency of a boiler?

Monitoring the efficiency of a boiler is primarily done through flue gas analysis. This method involves assessing the composition of the gases that are emitted from the boiler's flue stack after combustion. By analyzing the levels of gases such as carbon dioxide, oxygen, carbon monoxide, and unburned hydrocarbons in the flue gas, it is possible to determine how effectively the fuel is being burned and how much energy is being converted into usable heat.

An efficient boiler will have a balanced combustion process, resulting in a higher concentration of carbon dioxide and lower levels of harmful emissions. Regular flue gas analysis helps in identifying any inefficiencies or malfunctions in the boiler system, allowing for timely maintenance and optimization of combustion conditions.

Other methods such as thermocouple measurements, pressure vessel inspections, and visual maintenance checks provide valuable information about the operational status and safety of a boiler, but they do not specifically quantify the combustion efficiency as effectively as flue gas analysis.