An experimental study of a cylindrical multi-hole premixed burner for the development of a condensing gas boiler

作者：Lee Seungro; Kum Sung Min; Lee Chang Eon^*

来源：Energy, 2011, 36(7): 4150-4157.

DOI：10.1016/j.energy.2011.04.029

• Condensing boiler
• Flame stability
• Premixed burner
• NO(x) and CO emissions

This study experimentally examined a cylindrical multi-hole premixed burner for its potential use for a condensing gas boiler, which produces less NO(x) emissions and performs better. In this study, the hole diameters and the arrangement of a multi-hole burner were investigated using a flat burner model. The combustion characteristics for the flame stability as well as the NO(x) and CO emissions were examined using a cylindrical burner. For an optimal operating condition, the equivalence ratio for the cylindrical burner was between 0.70 and 0.75. For this condition, the turn-down ratio was 3:1 or higher, which was suitable for appropriate control of the boiler operation. The NO(x) and CO emissions were less than 40 ppm and less than 30 ppm, respectively, for a 0% O(2) basis. The LPG and LNG were able to be used in this type of burner because there was no phenomenal difference in the stable combustion region between them.

• 出版日期2011-7