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Title: Improve Your Boiler's Combustion Efficiency

Abstract

This revised ITP tip sheet on boiler combustion efficiency provides how-to advice for improving industrial steam systems using low-cost, proven practices and technologies.

Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
875450
Report Number(s):
DOE/GO-102006-2251
TRN: US200603%%160
DOE Contract Number:
AC36-99-GO10337
Resource Type:
Technical Report
Resource Relation:
Related Information: Industrial Technologies Program (ITP) Steam Tip Sheet # 4 (Fact Sheet)
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; 42 ENGINEERING; BOILERS; COMBUSTION; EFFICIENCY; STEAM SYSTEMS; ENERGY EFFICIENCY; INDUSTRY; U.S DEPARTMENT OF ENERGY; DOE; INDUSTRIAL TECHNOLOGIES PROGRAM ITP; ITP BESTPRACTICES; ITP STEAM BESTPRACTICES; INDUSTRIAL STEAM SYSTEMS; INDUSTRIAL ENERGY EFFICIENCY; STEAM SYSTEM IMPROVEMENTS; MONEY AND ENERGY SAVING TIPS; NATURAL GAS SAVING TIPS; BOILER EFFICIENCY; Industry

Citation Formats

Not Available. Improve Your Boiler's Combustion Efficiency. United States: N. p., 2006. Web. doi:10.2172/875450.
Not Available. Improve Your Boiler's Combustion Efficiency. United States. doi:10.2172/875450.
Not Available. Sun . "Improve Your Boiler's Combustion Efficiency". United States. doi:10.2172/875450. https://www.osti.gov/servlets/purl/875450.
@article{osti_875450,
title = {Improve Your Boiler's Combustion Efficiency},
author = {Not Available},
abstractNote = {This revised ITP tip sheet on boiler combustion efficiency provides how-to advice for improving industrial steam systems using low-cost, proven practices and technologies.},
doi = {10.2172/875450},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Jan 01 00:00:00 EST 2006},
month = {Sun Jan 01 00:00:00 EST 2006}
}

Technical Report:

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  • Operating your boiler with an optimum amount of excess air will minimize heat loss up the stack and improve combustion efficiency. Combustion efficiency is a measure of how effectively the heat content of a fuel is transferred into usable heat. The stack temperature and flue gas oxygen (or carbon dioxide) concentrations are primary indicators of combustion efficiency. Given complete mixing, a precise or stoichiometric amount of air is required to completely react with a given quantity of fuel. In practice, combustion conditions are never ideal, and additional or ''excess'' air must be supplied to completely burn the fuel. The correctmore » amount of excess air is determined from analyzing flue gas oxygen or carbon dioxide concentrations. Inadequate excess air results in unburned combustibles (fuel, soot, smoke, and carbon monoxide) while too much results in heat lost due to the increased flue gas flow--thus lowering the overall boiler fuel-to-steam efficiency. The table relates stack readings to boiler performance. On well-designed natural gas-fired systems, an excess air level of 10% is attainable. An often stated rule of thumb is that boiler efficiency can be increased by 1% for each 15% reduction in excess air or 40 F reduction in stack gas temperature.« less
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