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## ﻿calculation method of heat content of gas boiler flue gas ### Heat recovery and environmental impacts of flue gas

The heat efficiency of a flue gas waste heat boiler is the percentage of the effective heat in the heat injected into the fuel. The anti-balance test method is usually used to measure boiler thermal efficiency. The calculation formula for the thermal efficiency of the anti balance method: η= 100- (q2+q3+q4+q5+q6) 1. q2-flue gas heat loss

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Flue Gas Analysis Calculations. Flue gases are formed on combustion of air with fuel in the presence of heat. Combustion of fuel release flue gases which is a mixture of Carbon Dioxide, Carbon Monoxide, Sulfur Dioxide, H 2 O Vapor, Nitrogen or Nitro-Oxides, Oxygen and ash particles. The quantity of flue gases is also calculated using stoichiometry calculation when air reacts with the fuel.

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There is another approach that can be used to determine the flue gas temperature from a natural gas furnace . The attached diagram uses the Percent Excess Air and the Percent Available Heat (this is the percentage of input energy that is delivered).

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Flue Gas Temperature and Heat in the Flue Gas Flow (Btu

Learn More ### Flue Gas Waste Heat Boiler Thermal Efficiency Calculation

When the flue gas volume, per unit mass, is divided by the heating value, per unit mass, the influence of the inert fuel components is therefore largely accounted for. For a

Learn More ### Flue Gas Waste Heat Boiler Thermal Efficiency Calculation

Flue Gas Waste Heat Boiler Thermal Efficiency Calculation

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Assuming that flue gases contain only these two gases, the losses [kW]can be calculated as: φ L1 = m& CO ⋅ H l,CO + m& H 2 ⋅ H l, H 2 (9) where m& CO is the mass flow of carbon monoxide [kg/s], m& H 2 the mass flow of hydrogen, H l,CO the lower heating value (LHV) of carbon monoxide (10,12 MJ/kg), and H l,H 2 the lower heating value (LHV) of hydrogen (119,5 MJ/kg).

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