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. A higher percentage can be recovered with a Flue Gas Condenser, assuming there is enough cold water to condense all of the flue gas that is available. The calculations to determine the efficiency of condensing economizers are complex. If you want to know the specific boiler economic efficiency calculation method, you can consult our online customer service, our engineers will list the boiler economizer calculation formula based on the information you provide.

Economizer is Important

Studies have shown that over a 20 year period, 96% of the cost of operating a boiler system comes from fuel costs. Also, in a typical boiler system, 10% to 20% of energy input is lost in the form of heat escaping to the atmosphere. The installation of a boiler economizer helps to solve this problem. An economizer is a unit that captures heat from the stack, and then returns it to a water system. To determine if a boiler economizer is right for your facility, look at your annual boiler fuel bill and subtract 5 to 10% of the cost. If this is a significant number to you, then you should consider adding an economizer. The payback will have a direct impact on your bottom line. This is one of ZBG’s many products that help companies reduce overall energy consumption. And remember, fuel not burned equals exhaust gasses not emitted!

Three major parameters are considered in evaluating all boiler economizers; 1) fuel type, 2) acceptable backpressure on the exhaust, 3) inlet water temperature. These will determine which of our following heat recovery product is best for you.

Feedwater Heater

normally used on small boilers burning natural gas, and non-condensing flue gas environments. Inlet temperatures 150F to 250F

Gas Condensing Water Heater

normally used on small and large systems burning natural gas, and condensing flue gas environments. Inlet temperatures 40F to 150F

Heavy Duty Economizer

normally used on large systems burning dirty fuels, and non-condensing flue gas environments. Inlet temperatures 200F minimum

On-Demand Economizer

fits where other systems will not. Normally systems burn natural gas, and condensing flue gas environments. Inlet temperatures 40F to 150F

Dual Stage Economizer

used for heating two separate streams with the same economizer. Can be used on small and large systems burning natural gas, and condensing or non-condensing flue gas environments. Inlet temperatures 40F to 250F

We ZBG focus on the boiler industry for more than 70 years, providing high-quality boiler products to customers around the world, deeply trusted and loved by consumers, and ensuring product quality to our purpose. If you have any demand for boiler products, we will satisfy you Any need