Can the water content in a boiler flue be estimated?

It can be calculated with relatively high accuracy. Below is the formula for calculating the water content in the flue gases of a gas burner: V3. The water vapor content in the flue gases is expressed in nm3 per nm3 of fuel gas. Xi represents the composition percentage of the fuel gas; V3i denotes the volume of water generated upon the combustion of each component, also in nm3 per nm3 of fuel gas. a is the excess air coefficient, V0 represents the theoretical amount of air required for burning the fuel gas, also in nm3 per nm3 of fuel gas. GH refers to the moisture content in the air, in g per kg of air. The calculation principle is the same for fuels as well – it involves two components: the water formed from the oxidation of hydrogen in the fuel, and the water vapor present in the air. Incomplete combustion must be taken into account when calculating fuel consumption, which can cause deviations in the results

The moisture content in flue gas falls into two main categories. One method involves wet dust removal for the flue gas; the moisture content of the flue gas is related to its temperature. The saturated water level at that temperature can be found in relevant tables, which are available in manuals on thermodynamics, combustion, and other aspects of design calculations. Another method is to release the exhaust gases directly after fuel combustion; the water content in this case depends on the fuel, including both the water content in the fuel itself and the water generated during combustion, which can be determined through combustion calculations. 1. The water content of the fuel itself. 2. Water formed by the combination of H and O in the fuel composition. (If chlorine is present, it will first combine with H to form HCl). 3. Moisture content in the combustion air. 4. Other amounts of water added from outside