Which method is used to analyze the combustion efficiency in a boiler?

The orsat apparatus is a device designed specifically for analyzing the composition of flue gases, which is essential in determining the combustion efficiency in a boiler. This method allows for the measurement of gases such as carbon dioxide (CO2), oxygen (O2), and carbon monoxide (CO) in the flue gas emissions. By understanding the concentrations of these gases, operators can assess how effectively the fuel is being combusted. High levels of CO2 and low levels of O2 typically indicate efficient combustion, while the presence of CO suggests incomplete combustion.

In contrast, a moisture meter, while useful for assessing fuel quality and its moisture content, does not directly measure the efficiency of combustion in a boiler. A pyrometer measures temperature, which is helpful in other applications, but does not provide information on the gas composition required for combustion efficiency analysis. A pressure gauge measures pressure levels within the boiler system, which can be relevant for monitoring operational parameters, but again does not deliver insights into combustion efficiency.

Thus, using the orsat apparatus is the most suitable method for directly analyzing combustion efficiency in a boiler by evaluating the resulting flue gases.