Experimental investigation of fuel vaporization on combustion efficiency

Conference · Mon Dec 01 04:00:00 EST 1980

OSTI ID:5689228

Zakkay, V; Clisset, H

The development of a residential size vaporizing oil burner is presented along with its operational and performance characteristics. The vaporization scheme consists of spraying No. 2 oil onto a regeneratively heated surface at a temperature above the oil vaporization temperature (650/sup 0/F). The vaporized oil mixes with a preheated air (T = 250/sup 0/F) stream to produce a uniform fuel air mixture. The premixed vaporized fuel/air stream produces short blue flamelets anchored to a steel screen flame holder. The operational and performance characteristics of this burner are presented for a range of the air and oil flow parameters around the stoichiometric condition, and for a nominal firing rate of less than or equal to 1.2 gph. Operation with less than 3% excess air is demonstrated with very little soot formation. The combustion quality of the vaporizing oil burner is substantially improved compared to conventional spray combustion and recirculation type blue flame burners. The vaporizing oil burner was adapted to a conventional boiler and the thermal efficiency was determined by a calorimeter technique and compared to the stack method. The thermal efficiency with the vaporized combustion mode is about 4% greater than conventional spray combustion burners. The increase is realized through the reduced excess air requirements. The increased efficiency can result in reduced oil consumption from 12% to 20% depending on the location and usage of the burner unit.

• Research Organization: New York Univ., NY (USA). Dept. of Applied Science
• DOE Contract Number: AC22-77ET11283
• OSTI ID: 5689228
• Report Number(s): NYU/DAS-80-20; CONF-810621-7; ON: DE84000358
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320101* -- Energy Conservation
Consumption
& Utilization-- Residential Buildings-- (-1987)
BOILERS
BURNERS
CHEMICAL REACTIONS
COMBUSTION
DESIGN
EFFICIENCY
ENERGY CONSUMPTION
EVAPORATION
FUEL CONSUMPTION
OIL BURNERS
OPERATION
OXIDATION
PERFORMANCE
PHASE TRANSFORMATIONS
RESIDENTIAL SECTOR
THERMAL EFFICIENCY
THERMOCHEMICAL PROCESSES