Thermal efficiency and economic analysis of biomass boiler using cylindrical sawdust stove as heat source

Name: Pornpitak Tompat

Organization : Ubon Ratchathani University. Faculty of Engineering

Name: Kulachate Pianthong

Organization : Ubon Ratchathani University. Faculty of Engineering

Email : Kulachate.P@ubu.ac.th

Name: Jing Dincherdchu

Organization : Dhewada Power Limited Partnership

keyword: Biomass boiler

; Thermal efficiency of biomass boiler

; Biomass Stove

; Economic value of biomass boiler

Abstract: The purpose of this research is to investigate the thermal efficiency of the biomass boiler using a cylindrical sawdust stove as the heat source by using direct method. In this study, the biomass boiler is a small scale steam generator and custom fabricated to purposely utilize the cylindrical biomass stove using sawdust as fuel. This biomass boiler is a 4-turn fire tube, which fabricates in both vertical and horizontal configurations. It contains 230 liters of water, and the heat exchange area in the combustion chamber is 15.30 square meters fitted with four cylindrical biomass stoves using 15% humidity sawdust. The sawdust was packed in the biomass stove at different compression pressures, which are 60 bar, 80 bar, and 120 bar. Results showed that when the sawdust was packed at a pressure of 60 bar, the boiler can continuously produce the steam for 4 hours and gives a maximum efficiency of 29.52%. Similarly, when the sawdust was packed at a pressure of 80 bar, it also had a continuous steam generation for 4 hours, with a maximum efficiency of 29.47%. Furthermore, when the sawdust was packed at a pressure of 120 bar, it demonstrated a continuous steam production time of 5 hours, with the highest efficiency of 30.63%. Regarding the economic value of this biomass boilers, it was found that the cost of generating the steam was only 669.63 baht/ton of steam. This cost is much lower compared to using an LPG boiler, which incurs a cost of 1,867 baht/ton of steam. Furthermore, it is also more cost-effective than using a fuel oil boiler, which costs 1,430 baht/ton of steam. It is shown that this biomass boiler has a high potential technically and economically to apply in small or medium-sized industries.

King Mongkut's University of Technology North Bangkok. Central Library

Address: BANGKOK

Email: library@kmutnb.ac.th

Created: 2024

Modified: 2024-12-13

Issued: 2024-12-13

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BibliograpyCitation : In Thai Society of Mechanical Engineers (TSME) and Chiang Mai University. The 13th TSME International Conference on Mechanical Engineering (TSME-ICoME 2023) (pp.70-80). Chiang Mai : Chiang Mai University, 2023

eng

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