Karakteristik Pembakaran Wood Pellet Stove dengan Variasi Geometri dan Blockage Ratio Flame Connector


  • Lilis Yuliati Brawijaya University
  • Nurkholis Hamidi Universitas Brawijaya
  • Mega Nur Sasongko Universitas Brawijaya
  • Ibrahim Ahmad Ibadurrohman Universitas Brawijaya




Flame Connector Geometry, Blockage Ratio, Combustion Characteristics, Water Boiling Test, Intermittent - Continuous Feeding System


This research was intended to investigate the effect of the geometry and blockage ratio of the flame connector on the combustion characteristics of wood pellets on a wood pellet stove. Combustion characteristics observed in this research included flame visualization, flame temperature, specific fuel consumption, and corrected-specific fuel consumption. Two types of geometry were used as a flame connector, i.e. disk and cone; for each geometry, the blockage ratio was varied at 0,6, 0,7, and 0,8. The blockage ratio was varied by change the number of the circular hole on the flame connector. Combustion in wood pellet stove without flame connector was then used as a comparison. The flame visualization test was applied to find out the color and dimensions of the flame, which was then used to determine the temperature on this flame. The water boiling test method version 4.2.3 was used to determine specific fuel consumption and corrected specific fuel consumption. The combustion chamber of the wood pellet stove has a dimension of 15 cm diameter and 20 cm height. Wood pellet supply used intermittent - continuous feeding system with a mass flow rate of 16 gram/minute. Flame visualization shows that stove with cone flame connector has a larger flame dimension and flame dimension decreases with the increasing of blockage ratio. The highest flame temperature occurred near the outlet of the combustion chamber, the same conditions were observed in all variations experiment.  The application of flame connector involves greater specific fuel consumption due to longer boiling time. However, a correction factor by considering the amount of evaporated water results from corrected specific fuel consumption of wood pellet stove with cone flame connector which is smaller compared to the other type of wood pellet stove.

Author Biography

Lilis Yuliati, Brawijaya University

Mechanical Engineering Department


BADAN PENGKAJIAN DAN PENERAPAN TEKNOLOGI., Outlook Energi Indonesia 2017: Insiatif Pengembangan Teknologi Energi Bersih., Jakarta, BPPT, 2017.

PURWANTO, WIDODO W., SUPRAMONO D., & FISAFARANI H., “Biomass Waste and Biomass Pellets Characteristics and Their Potential in Indonesiaâ€, In Proceedings of The 1st International Seminar on Fundamental and Application of Chemical Engineering, Bali, Nov. 2010.

CHRISTOFER R, OHMAN M. & WASTERLUND, I., “Effect of Raw Material Composition in Woody Biomass Pellets on Combustion Characteristicsâ€, Biomass & Bioenergy, v. 31, n. 1, pp. 66-72, 2007.

IEA., Handbook of Biomass Combustion and Co-Firing, Enschede, Twente University Press, 2002.

SKJEVRAK G, SOPHA BM., “Wood-Pellet Heating in Norway: Early Adopters Satisfaction and Problems that Have Been Experiencedâ€, Sustainability, v. 4, pp. 1089-1103, 2012.

BALDWIN, S. F., Biomass Stove Engineering Design, Development. Arlington, Virginia: Volunteers in Technical Assistance - VITA (with Center for Energy and Environmental Studies, Princeton University).

BAILIS, R., OGLE, D., MACCARTY, N. & STILL, D., The Water Boiling Test (WBT) version 4.12, Household Energy and Health Programme, Shell Foundation, 2009.

JAIN, T. & SHETH, P.N., “Design of energy utilization test for a biomass cookstove: Formulation of an optimum airflow recipeâ€, Energy, v. 166, pp. 1097-1105, 2019.

BUCHMAYR, M., GRUBER, J., HARGASSNER, M. & HOCHENAUER, C., “Experimental Investigation of the Primary Combustion Zone During Staged Combustion of Wood-chips in a Commercial Small-scale Boilerâ€, Biomass and Bioenergy, v. 81, pp. 356-363, 2015.

GOGOI, B. & BARUAH D. C., “Steady-State Heat Transfer Modeling of Solid Fuel Biomass Stove: Part 1â€, Energy, v. 97, pp. 283-295, 2016.

IGBOANUGO, A.C. & AJIEH, M.U., “Design and construction of a biomass stove for cooking in rural settlements in Nigeriaâ€, Nigerian Research Journal of Engineering and Environmental Sciences, v. 2, n. 2, pp. 351-359, 2017.

ABDEL-REHIM A. A., EL-NAGAR K. H. & ELSEMARY I. M. M., “Effect of Bluff Body Geometry on Flame Stabilization with the Assist of Langmuir Probeâ€, Cairo: Benha University, 2013.

CRESIUS, P. M., The Effect of Blockage Ratio and Distance from a Free Surface on the Performance of a Hydrokinetic Turbine, Thesis. Pennsylvania, Lehigh University, 2013.

INTERNATIONAL WORKSHOP AGREEMENT, The Water Boiling Test Version 4.2.3: Cookstove Emissions and Efficiency in a Controlled Laboratory Setting, Pennsylvania, IWA, 2014.

DENG, T., ALZAHRANI, A. M. & BRADLEY, M. S., “Influences of Environmental Humidity on Physical Properties and Attrition of Wood Pelletsâ€, Fuel Processing Technology, v. 185, pp. 126-138, 2019.

PELLETS ATLAS, English Handbook for Wood Pellet Combustion: Development and Promotion of a Transparent European Pellets Market, Knowlhill, National Energy Foundation, 2009.

SINGH, Y. D., MAHANTA, P., & BORA, U., “Comprehensive Characterization of Lignocellulosic Biomass Through Proximate, Ultimate and Compositional Analysis for Bioenergy Productionâ€, Renewable Energy, v. 103, pp. 490-500, 2017.

KUMAR, M. KUMAR, S. & TYAGI S. K., “Design, Development and Technological Advancement in the Biomass Cookstoves: A reviewâ€, Renewable and Sustainable Energy Reviews, v. 26, pp. 265-285, 2013.

GOGOI, B. & BARUAH D. C., “Steady-State Heat Transfer Modeling of Solid Fuel Biomass Stove: Part 1â€, Energy, v. 97, pp. 283-295, 2016.