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*1) JC:%>, I$7$PJC9, $Z=:>, K9J <L , %CK?J <L 40002, J9>: ratchaphon@kku.ac.th

2) KZd:, K9N::KZd:, 7$PJC9, $Z=:>,

K9J <L , %CK?J <L 40002, J9>: chatcharin_pookie@hotmail.com

.A Study of Boiler Efficiency Using Blended Fuel between Glycerin and Heavy Oil Fuel Ratchaphon Suntivarakorn ^*1) and Chatcharin Sakkampang ²⁾

Abstract

This paper presents a study of boiler efficiency when using blended fuel between glycerin and heavy oil fuel. Glycerin blended with heavy oil fuel (GHF) was prepared in seven formulas in the ratio of glycerin between 10-70% by volume. The blended fuels were tested in a steam boiler in order to determine boiler efficiencies. Results showed that the efficiency of boiler when using heavy oil fuel was 91.72% and was decreased with the increasing of the ratio of glycerin. Boiler efficiencies using GHF with the ratio of glycerin at 10%, 20%, 30%, 40%, 50%, 60% and 70% by volume were 89.91%, 89.14%, 88.12%, 87.45%, 86.74%, 85.90% and 85.39%, respectively.The result also showed that the quantity of carbon dioxide was decreased according to the increasing of glycerin in GHF, while the quantity of carbon monoxide was increased.

However, the emission of carbon monoxide for all GHFs was lower than the quantity controlled by Thai regulation. Moreover, the result was also revealed that the suitable ratio of glycerin blended with heavy oil fuel was at 40%. This ratio can save 0.0198 baht for one kilogram of steam production. If this ratio is used in 4,700 kilograms per hour of steam boiler which operates for 8 hours per day, the payback period will be at 3.58 months.

Keywords: Steam Boiler, Boiler Efficiency, Glycerin

*1) Associate Professor, Department of Mechanical Engineering, Khon Kaen University, Khon Kaen, 40002, E-mail : ratchaphon@kku.ac.th

2) Post-graduate Studentr, Department of Mechanical Engineering, Khon Kaen University, Khon Kaen 40002,

Email : chatcharin_pookie@hotmail.com

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