タイトルまたは説明

in general the thermal efficiency of more than **0% of the boiler on the common sense is difficult to understand but if the water vapor in the flue gas condensation latent heat utilized ,and low exhaust temperatues drop low enough to smoke smoke damage is very low the the thermal efficiency of the boiler will be increased to **0%of course the fuel at high heat to calculate the boiler low calorific value of the fuel