The fuel is considered to be Standard Natural Gas (1040 Btu/std. ft3 ), the fuel consumption is 100,000 Btu/hr (HHV Basis), and the heat delivered to the home is 80,000 Btu/hour. The percent excess air for this combustion system is 10 %. The combustion air is drawn from …
In a non-condensing boiler, the flue gases are at a temperature of 120-200°C. In a condensing boiler, more heat is removed and the temperature falls to below 100°C and as low as 50°C for the most efficient boilers operating at reduced boiler return temperature.
At Maximum Required Output: On each fuel at site altitude, with and without economizer (if applicable) in service, at 15 percent excess air. Data must include fuel and steam flow, boiler flue gas outlet temperature, economizer (if provided) flue gas outlet temperature, steam quality, boiler efficiency, furnace pressures, and predicted boiler radiation and unaccounted losses, feedwater and flue
Vol. 5, Issue 1, January 2016 Influence of Flue Gas and
paragraphs only if flue gas economizer is required. H. //Flue Gas Economizer: 1. Drawings showing arrangement and dimensions of unit and all accessories. 2. Design and construction of unit and accessories including safety relief valve. 3. Weight of entire unit, empty and flooded. 4. Pressure and temperature limitations of unit and accessories. 5.
transfer to the water where various losses by hot flue gas, radiation, unburnt fuel, moisture content of the air and fuel and blowdown etc. as the temperature of the flue gas leaving a boiler typically ranges from 150-250 0C, about 10-40% of the heat energy is lost .
Flue Gas Temperature and Heat in the Flue Gas Flow (Btu
Knowing your boiler is safe is probably your most important consideration. All gas boilers emit carbon monoxide when heating your home or hot water. This is usually nothing to worry about as this harmful gas is channelled out of your home through the boiler's flue. The lower the carbon monoxide emissions listed in the specifications, the better.