How to calculate the thermal efficiency of a heating furnace
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How to calculate the thermal efficiency of a heating furnace
The thermal efficiency is generally calculated in two ways: one is by dividing the heat required to heat the oil by the calorific value of the fuel to determine the heat output； The second type is a value calculated based on oxygen content and flue gas temperature ； Both calculation methods have errors, but the second one is relatively more commonly used. Thermal efficiency = 100 – 2 + 1.1 – (0.0083 + 0.031*((21 + 0.116*oxygen content)/(21 – oxygen content))) * (flue gas temperature + 1.35*0.0001*flue gas temperature*flue gas temperature) – (4.043*((21 + 0.116*oxygen content)/(21 – oxygen content)) – 0.252)*30*0.0001