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How to calculate the thermal efficiency of the boiler?
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How to calculate the thermal efficiency of the boiler?

Views: 1889     Author: Site Editor     Publish Time: 2022-08-29      Origin: Site


The thermal efficiency of the boiler can be calculated by the positive and negative balance methods respectively.


1. Positive balance method

The method of calculating the thermal efficiency by the ratio of the heat used by the boiler to the total heat released by the fuel is called the positive balance method, also called the direct measurement method. The calculation formula of positive equilibrium thermal efficiency can be expressed as follows:

Thermal efficiency = effective utilization of heat / total heat released by fuel * 100% = boiler evaporation capacity * (steam enthalpy - feed water enthalpy) / (fuel consumption * low calorific value of fuel) * 100%


2. Counter balance method

The method of measuring and calculating the heat loss of the boiler to obtain the thermal efficiency is called the inverse balance method, also called the indirect measurement method. The counter balance thermal efficiency can be calculated by the following formula:

Thermal efficiency = 100% - sum of percentages of various heat losses = 100% - heat loss of exhaust gas - heat loss of incomplete combustion of gas - heat loss of incomplete combustion of solid - heat loss of heat dissipation - physical heat loss of ash


The higher the thermal efficiency of the boiler, the lower the gas consumption. 


The above is the answer of Jiangsu Sifang boiler to this question. If you have any questions about the boiler, please consult the online customer service of Jiangsu Sifang boiler or call 0516-85871846 and 0516-85532705. The professional and technical personnel of Jiangsu Sifang boiler will answer your questions in time.


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