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2019-10-4 · Optimal content of carbon dioxide - CO 2 - after combustion is approximately 10% for natural gas and approximately 13% for lighter oils. Normal combustion efficiency for natural gas at different combinations of excess air and flue gas temperatures are indicated below:

2019-10-2 · Boiler Efficiency Importance: Boiler heat loss is loss of money, if your business losing money then it is a serious concern. Efficient Boiler is the solution. We provide you various ways to improve your Boiler â€¦

Stack Losses for Natural Gas Natural Resources Canada. 2019-7-31·Convert to a dry gas basis using the following formula for natural gas: O 2dry = O 2wet x (1.222 - 0.012 O 2wet) % Obtain the CO 2 % by volume dry gas basis. When firing any given fuel the amount of CO 2 in the flue gas is related to the amount of O 2 in the flue gas.

As an illustration, the optimum value of air excess to the combustion of natural gas is 5 to 10%, liquid fuel at the rate of 5 to 20%, and 15 to 60% for coal combustion. Boiler Thermal Efficiency. Boiler thermal efficiency shows how the performance in terms of its function as a heat exchanger.

2019-10-9 · For a modern 3-pass shell boiler firing natural gas with a flue gas exit temperature of 140 o C a condensing economizer would reduce the exit temperature to 65 o C increasing thermal efficiency by 5%. 3. Combustion Air Preheat. Combustion air preheating is an alternative to feedwater heating.

2019-10-2 · Boiler Efficiency Importance: Boiler heat loss is loss of money, if your business losing money then it is a serious concern. Efficient Boiler is the solution. We provide you various ways to improve your Boiler â€¦

2012-1-2 · Natural gas is a gaseous natural fossil fuel consisting primarily of to escape up the stack. But too much excess December 2006 Combustion & Flue Gas Analysis 21 Excellence in measurements Boilers Wall-hang type : The body of the boiler is fitted on the wall 20-30 KW

ASME PTC-4 â€“ Indirect Method: Stack Loss Method This method approximates the stack losses of a boiler to estimate boiler efficiency. Parameters The parameters needed to calculate this method are given below. These data are calculated during source testing. 1. Stack temperature (TStack) 2. Dry oxygen in flue gas (O2,Dry,%) in percent

2018-8-5 · 4-pass boiler will be lower than the stack temperature of a 2 or 3-pass boiler, of the same basic design, operating under similar conditions. Because of this fact, the 4- add-on devices if the boiler is designed for optimum flue gas velocities in the first place. Each boiler pass should be designed with a cross sectional area to

2011-4-7 · A sample 400-horsepower Cleaver-Brooks Model CB-400 boiler operates at a rated output of 13,600,000 BTU-per-hour, or 13,127 pounds of water to steam-per-hour. The boiler will consume some 5,200 CFM of air and 16,750,000 BTU of fuel (natural gas or light oil). The flue temperature will run at approximately 270 degrees F.

2019-10-12 · Convert to a dry gas basis using the following formula for natural gas: O 2dry = O 2wet x (1.222 - 0.012 O 2wet)â€š % Obtain the CO 2 â€š % by volumeâ€š dry gas basis. When firing any given fuel the amount of CO 2 in the flue gas is related to the amount of O 2 in the flue gas. For natural gasâ€š the relationship is defined by the following