how to calculate boiler economizer efficiency

Boiler name: how to calculate boiler economizer efficiency
Boiler description: High efficiency, low back pressure, ultra-low NOx emissions
Location:: WUXI China

Molten salt heaters use molten potassium nitrate and sodium nitrite as heating media. Molten salt heater will heat the powder salt over the melting point until the viscosity of the molten salt allows circulating pump works, after the whole system is under circulating condition, then feed then into the thermal fluid heater for further circulating rising temperature to make it to be recycling used. Normal media working temperature is 400-550℃, top working temperature could reach 600℃.

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Evaluating the Effect of Economizer on Efficiency of th

The economizer decline the flue gas temperature to about 100°C and has a remarkable effect on improving the efficiency of “Boiler 2” about 7 percent compare to the efficiency of “Boiler 1” that is 77.23.

Use Feedwater Economizers for Waste Heat Recove

Boiler flue gases are often rejected to the stack at temperatures more than 100°F to 150°F higher than the temperature of the generated steam. Generally, boiler efficiency can be increased by 1% for every 40°F reduction in flue gas temperature. By recovering waste heat, an economizer can often reduce fuel requirements by 5%

How to Calculate Boiler Economizer Efficien

How to Calculate Boiler Economizer Efficiency Boiler Economizer Calculation. A generally accepted “rule of thumb” is that about 5% of boiler input capacity can be recovered with a properly sized economizer.

Steam Calculators: Boiler Calculat

Combustion Efficiency is the % of fuel energy that is directly added to the feedwater and not otherwise lost or used. Blowdown Rate is the % of incoming feedwater mass flow rate that leaves the boiler as a saturated liquid at boiler pressure. Does not include any evaluation of any complex boiler configurations or fluctuations in operation.


Determine the overall efficiency of a steam boiler generating 56,00 lb/h (7.1 kg/s) of 600 lb/in 2 (abs) (4137.0 kPa) 800°F (426.7°C) steam. The boiler is continuously blown down at the rate of 2500 lb/h (0.31 kg/s). Feedwater enters the economizer at 300°F (148.9°C).

Boiler Calculations - K

The pressure losses in the heat exchanger units of the boiler are estimated according to the following approximations: • Economizer: the pressure loss is 5-10 % of the pressure of the feedwater entering the economizer. • Evaporator: Once through boilers: in once-through boilers the pressure loss of the evaporator is between 5 and 30 %.


• The economizer size optimized by reducing the number of tubes of module by enhancing the heat transfer across the module. • By installing the Air pre-heater and Economizer the total husk consumption rate is reduced and the efficiency of the boiler is also increased to 73% to 89%

Consider Installing a Condensing Economiz

Note: Example in Table 2 assumes an 83% fuel-to-steam efficiency, 4% excess oxygen, a stack temperature of 300°F after feedwater economizer, a blowdown rate of 4%, and a boiler feedwater temperature of 260°F. Makeup water temperature is 55°F.

Efficiency Analysis and Enhancement of Heat Recovery Stea

efficiency of a high pressure steam HRSG is to install an economizer on the HRSG. Therefore, an economizer is a heat exchanger, which transfers heat from the stack gases to the incoming feedwater. Typically, on a high pressure HRSG, the efficiency improvement with an economizer is 2 to 4%,

Calc 1 - Boiler Efficiency.xls - exoeng.c

Economizer Ash Boiler Efficiency Heat Losses @ Tested AH Leakage: Boiler Efficiency Heat Losses @ Design Fuel flow and heat input are not used to calculate boiler efficiency, but are necessary for calculation of air and gas flows. OR

Boiler Stack Gas Heat Recovery - apps.dtic.m

Boiler efficiency is defined as:: -I (Energy Losses) "boiler (Energy Released by Fuel Combustion) It is seen that any decrease in energy losses is tantamount to a higher efficiency and reduced fuel consumption.