Article Info 제30권 3호 강원 농업생명환경연구 Vol.30, No.3, pp.192-199, 2018
Title Comparative Analysis of the Thermal Efficiency of Wood Pellet Boilers with Nozzle-type Burner Pins on the Grate
Author Kim, D. H.1 , M. J. Kim2 , I. S. Jeong2 , L. H. Cho2 , C. G. Lee2 , W. H. Kim3 and S. H. Euh4*
Institutions 1Professor, Department of Biosystems Engineering, Kangwon National University, Chuncheon 24341, Korea
2Graduate Student, Department of Biosystems Engineering, Kangwon National University, Chuncheon 24341, Korea
3Researcher, Korea Energy Institute, Chuncheon 24464, Korea
4Head, Korea Energy Institute, Chuncheon 24464, Korea 
Abstract The main objective of this study was to improve the wood pellet boiler and overcome inefficient air supply to the grate in the combustion chamber. Nozzle-type burner pins were attached to the grate to increase the contact area between the solid fuel (pellets) in the grate and the supplied air.
In order to verify the increase in thermal efficiency due to the nozzle-type burner pins, comparative experiments were conducted using the same two wood pellet boilers. Two hours of experiments were conducted under the same external conditions (amount of oxidizer, load, ambient temperature, and pellet consumption). The results showed that the combustion characteristics of the flue gas from the boiler with burner pins were improved compared to those of the conventional boiler: the carbon dioxide content was increased, and the thermal efficiency was increased by 2.51%. The contact area between the wood pellets in the grate and the air supply was increased by the nozzle-type burner pins; hence, this boiler showed an improved combustion performance compared to that of the conventional burner system.
Keyword Injection air, Nozzle-type burner pin, Thermal efficiency, Wood pellet boiler
09_(192-199)201800031 어승희.pdf