What is a Condensing Boiler?
Dec 26, 2024
A condensing boiler is a system that uses a highly efficient condensing heat recovery device to absorb both the sensible heat and the latent heat released during the condensation of water vapor from the high-temperature flue gases emitted by the boiler. This process significantly improves the boiler’s thermal efficiency. The key technology behind a condensing boiler is the condensing process, which is a modern, energy-saving, and environmentally friendly method. The principle is straightforward: it recovers heat energy from flue gases through condensation. In traditional boilers, the flue gas temperature is usually between 160°C and 250°C or even higher. This causes the water vapor generated during fuel combustion (e.g., methane combustion: CH₄ + 2O₂ → CO₂ + 2H₂O) to remain in a superheated state and escape with the flue gases. As a result, the thermal efficiency of traditional boilers is generally only 85% to 91%. In contrast, a condensing gas boiler reduces the flue gas temperature to below 58°C, fully recovering both the sensible heat and the latent heat released during the condensation of water vapor. This allows the thermal efficiency to reach up to 109%. Working Principle of a Condensing Boiler The core of a condensing gas boiler is...
