What is the general thermal efficiency of natural gas boilers?

The thermal efficiency of boiler refers to the percentage of effective heat in the heat delivered by fuel. The thermal efficiency of boiler is one of the important indexes to reflect the energy efficiency of boiler. Many users often ask, what is the general thermal efficiency of natural gas boilers? In this page, ZOZEN Boiler will analyze the thermal efficiency of natural gas boiler and introduce the calculation method of thermal efficiency.

What is the general thermal efficiency of natural gas boiler?

According to the industrial boiler energy efficiency limit value and energy efficiency grade GB24500-2009, the specific answers to the general thermal efficiency of natural gas boilers may be 88%, 90%, 92% and 94%. The thermal efficiency of ZOZEN natural gas boiler can reach over 98%, which is generally superior to the market level.

How to calculate the thermal efficiency of natural gas boiler?

Generally, there are two methods to calculate the thermal efficiency of natural gas boilers: positive balance method and reverse balance method:

Positive equilibrium method

What is the general thermal efficiency of natural gas boiler = effective utilization of heat/all heat released by fuel * 100% = boiler evaporation * (steam enthalpy-feedwater enthalpy)/fuel consumption * low calorific value of fuel * 100%

Anti-equilibrium method

Generally, what is the thermal efficiency of natural gas boiler = 100%-sum of the percentages of various heat losses = 100%-heat loss of exhaust gas-heat loss of incomplete combustion of gas-heat loss of heat dissipation.