Explore the reasons why the thermal efficiency of oil-fired and gas-fired boilers exceeds 100%

Explore the reasons why the thermal efficiency of oil-fired and gas-fired boilers exceeds 100%

When communicating with the technical engineers of Zhengzhou Fangkuai Boiler Factory, some users discovered that the thermal efficiency of the boiler equipment introduced by Zhengzhou Fangkuai Boiler Factory could exceed 100% and reach as high as 107%. What's the reason? Is it because the boiler manufacturer arbitrarily advocates for the sale of boiler equipment? Let's find out.

For oil and gas boilers, there are low calorific value and high calorific value. The low calorific value is the closest to the actual calorific value of an industrial boiler during combustion, and is often used in design calculations. That is to say, the efficiency of the original boiler does not consider the part of the latent heat of gasification that accounts for 11% of the exhaust gas. The thermal efficiency of general oil-fired gas boilers Between 90~92%. When the boiler efficiency is calculated based on the low calorific value, if the condensation technology is used to utilize the latent heat of vaporization and part of the sensible heat in the exhaust gas, the efficiency will be greater than 100%.

Is it necessary for oil and gas boilers to have a condenser? According to the TSG G0002-2010 "Regulations for the Supervision and Management of Boiler Energy Conservation Technology" promulgated by the General Administration of Quality Supervision, Inspection and Quarantine on August 30, 2010, these regulations are based on the "Special Equipment Safety Supervision Regulations" and "Energy Consumption Supervision and Administration Measures for Special Equipment" , Put forward clear requirements for energy-saving work in boiler design, manufacturing, installation, transformation, maintenance and use, which is of great significance to standardizing boiler energy-saving work.

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