Use Feedwater Economizers for Waste Heat Recovery: Office of Industrial Technologies (OIT) Steam Energy Tips No.3

Program Document · Fri Mar 01 00:00:00 EST 2002

OSTI ID:15000228

A feedwater economizer reduces steam boiler fuel requirements by transferring heat from the flue gas to incoming feedwater. 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% to 10% and pay for itself in less than 2 years. The table provides examples of the potential for heat recovery.

• Research Organization: National Renewable Energy Laboratory (NREL), Golden, CO (United States)
• Sponsoring Organization: US Department of Energy (US)
• DOE Contract Number: AC36-99-GO10337
• OSTI ID: 15000228
• Report Number(s): DOE/GO-102002-1505; TRN: US200325%%123
• Resource Relation: Other Information: PBD: 1 Mar 2002
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
ECONOMIZERS
FEEDWATER
STEAM SYSTEMS
WASTE HEAT
HEAT RECOVERY
HEAT RECOVERY EQUIPMENT
OFFICE OF INDUSTRIAL TECHNOLOGIES
BESTPRACTICES
FEEDWATER ECONOMIZERS
STEAM DISTRIBUTION SYSTEMS
FLUE GAS ANALYZERS
OXYGEN TRIM SYSTEMS
INDUSTRY