What is the operating efficiency of a gas boiler?

2022 / May / Thu
Compared with ordinary gas-fired boilers, condensing gas-fired boilers have added condensing technology, and combined with energy-saving equipment such as condensers and economizers, the operating efficiency of the boiler can be increased to more than 98%, which can be described as very efficient operation. So, how does the condensing gas boiler achieve this ultra-high operating efficiency? Listen to the Fangkuai boiler brand to explain to you.

gas boiler efficiency

The core of the condensation technology is to reduce the heat loss of fuel combustion, efficiently absorb the heat energy generated by the fuel, and at the same time, due to the condensation of the flue gas, the harmful substances in the flue gas are collected into the condensed water, which reduces the amount of acidic substances and other pollutants released into the air. emission. More advanced condensing gas boilers use smokeless combustion technology, which reduces nitrogen oxide (NOx) emissions beyond 30 mg/m3.

The key of the condensing boiler is the condensation technology, which is a new type of energy-saving and environmental protection technology; its principle is not complicated, and a simple summary is to recover the heat energy in the flue gas by condensing the flue gas. In traditional boilers, the exhaust gas temperature is generally 160~250℃, or even higher, so that the water (such as natural gas: CH4+2O2→CO2+2H2O) generated when the fuel is burned is in a superheated state in the flue gas. Air escapes from the chimney. The thermal efficiency of traditional boilers can generally only reach 85% to 91%. The condensing gas boiler produced by Fangkuai Boiler brand can reduce the exhaust gas temperature to 50~70℃, fully recover the sensible heat in the flue gas and the condensation latent heat of water vapor, and the thermal efficiency can reach up to 109%.

In layman's terms, the working principle of the condensing gas boiler is to recover the energy in the hot flue gas (generally around 140 ℃) emitted by the boiler after combustion through a certain device, and the exhaust gas temperature after recovery is only about 60 ℃. In this way, the thermal efficiency is increased by about 10%, which naturally saves about 10% of the gas. At the same time, in the process of energy recovery, it can also reduce the emission of harmful gases and reduce environmental pollution.