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Thermal Characteristics of Coconut Shells as Boiler Fuel

Division of Renewable Energy Engineering, Department of Mechanical and Bio-System Engineering, Faculty of Agricultural Engineering and Technology, IPB University, Jl Raya Darmaga Kampus IPB Dramaga Bogor 16680 West Java, Indonesia

Received: 16 Aug 2022; Revised: 2 Dec 2022; Accepted: 24 Dec 2022; Available online: 5 Jan 2023; Published: 15 Mar 2023.
Editor(s): Rock Keey Liew
Open Access Copyright (c) 2023 The Author(s). Published by Centre of Biomass and Renewable Energy (CBIORE)
Creative Commons License This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.

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Abstract

Agricultural waste products, such as wood, rice husk, corn waste, and coconut shells, are abundantly available  and can potentially be used as an energy source, particularly  for direct combustion in boilers. Because coconut production increases every year, it would be useful to find an alternative use for coconut shells, which are a type of coconut waste. As coconut shells can be used as fuel in boilers, the aim of this study was to evaluate the thermal characteristics of coconut shells in this regard. This study used experimental results to evaluate the performance of a boiler when coconut shells were used as solid fuel. The variations in feed rate were 5, 7.5, and 10 kg/h, and the water flow rates varied between 1 litre per minute (lpm), 2 lpm, and  3 lpm. Temperature data were collected every second via data acquisition , and the mass flow rate of the flue gas was collected every 5 min using a pitot tube equation. One of the parameters evaluated in determining the success of coconut shells as boiler fuel is the thermal efficiency of the boiler. The results showed that the maximum thermal efficiency reached approximately 62.04%, and the maximum flue gas temperature was approximately 500 ℃ for a biomass mass flow rate of 7.5 kg/h. The maximum water temperature of the boiler was 99 ℃, which was reached at a minimum water flow rate of 1 lpm. The results showed that coconut shells are suitable for use as boiler fuel. 

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Keywords: Agricultural waste; boiler fuel; coconut shell; thermal characteristics

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  1. Bianchini, A., Cento, F., Golfera, L., Pellegrini, M., & Saccani, C. (2016). Performance analysis of different scrubber systems for removal of particulate emissions from a small size biomass boiler. Biomass and Bioenergy, 92, 31–39. https://doi.org/10.1016/j.biombioe.2016.06.005
  2. Carlon, E., Schwarz, M., Golicza, L., Verma, V. K., Prada, A., Baratieri, M., Haslinger, W., & Schmidl, C. (2015). Efficiency and operational behaviour of small-scale pellet boilers installed in residential buildings. Applied Energy, 155, 854–865. https://doi.org/10.1016/j.apenergy.2015.06.025
  3. Carlon, E., Verma, V. K., Schwarz, M., Golicza, L., Prada, A., Baratieri, M., Haslinger, W., & Schmidl, C. (2015). Experimental validation of a thermodynamic boiler model under steady state and dynamic conditions. Applied Energy, 138, 505–516. https://doi.org/10.1016/j.apenergy.2014.10.031
  4. Chao, L., Ke, L., Yongzhen, W., Zhitong, M., & Yulie, G. (2017). The Effect Analysis of Thermal Efficiency and Optimal Design for Boiler System. Energy Procedia, 105, 3045–3050. https://doi.org/10.1016/j.egypro.2017.03.629
  5. Euh, S. H., Kafle, S., Choi, Y. S., Oh, J. H., & Kim, D. H. (2016). A study on the effect of tar fouled on thermal efficiency of a wood pellet boiler: A performance analysis and simulation using Computation Fluid Dynamics. Energy, 103, 305–312. https://doi.org/10.1016/j.energy.2016.02.132
  6. Gölles, M., Reiter, S., Brunner, T., Dourdoumas, N., & Obernberger, I. (2014). Model based control of a small-scale biomass boiler. Control Engineering Practice, 22(1), 94–102. https://doi.org/10.1016/j.conengprac.2013.09.012
  7. Gowman, A. C., Picard, M. C., Rodriguez-Uribe, A., Misra, M., Khalil, H., Thimmanagari, M., & Mohanty, A. K. (2019). Physicochemical analysis of apple and grape pomaces, BioRes. 14(2), 3210-3230. https://bioresources.cnr.ncsu.edu/resources/physicochemical-analysis-of-apple-and-grape-pomaces/
  8. Haller, M. (n.d.). Combined solar and pellet heating systems-Improvement of energy efficiency by advanced heat storage techniques, hydraulics, and control. Novaquatis View project IEA SHC Task 44 Solar and Heat Pump Systems View project. https://www.researchgate.net/publication/260284478
  9. Handaya, H., Susanto, H., Indrawan, D., & Marimin, M. (2022). Supply and Demand Characteristics of Palm Kernel Shell as a Renewable Energy Source for Industries. International Journal of Renewable Energy Development, 11(2), 481–490. https://doi.org/10.14710/ijred.2022.41971
  10. Heredia Salgado, M. A., Tarelho, L. A. C., Matos, M. A. A., Rivadeneira, D., & Narváez C, R. A. (2019). Palm oil kernel shell as solid fuel for the commercial and industrial sector in Ecuador: tax incentive impact and performance of a prototype burner. Journal of Cleaner Production, 213,104–113. https://doi.org/10.1016/j.jclepro.2018.12.133
  11. Jangsawang, W. (2017). Utilization of Biomass Gasifier System for Drying Applications. Energy Procedia, 138, 1041–1047. https://doi.org/10.1016/j.egypro.2017.10.097
  12. Kang, S. B., Kim, J. J., Choi, K. S., Sim, B. S., & Oh, H. Y. (2013). Development of a test facility to evaluate performance of a domestic wood pellet boiler. Renewable Energy, 54, 2–7. https://doi.org/10.1016/j.renene.2012.11.007
  13. Kang, S. B., Oh, H. Y., Kim, J. J., & Choi, K. S. (2017). Characteristics of spent coffee ground as a fuel and combustion test in a small boiler (6.5 kW). Renewable Energy, 113, 1208–1214. https://doi.org/10.1016/j.renene.2017.06.092
  14. Kumar, A., Kumar, N., Baredar, P., & Shukla, A. (2015). A review on biomass energy resources, potential, conversion and policy in India. Renewable and Sustainable Energy Reviews, 45, 530–539 https://doi.org/10.1016/j.rser.2015.02.007
  15. Loh, S. K. (2017). The potential of the Malaysian oil palm biomass as a renewable energy source. Energy Conversion and Management, 141, 285–298. https://doi.org/10.1016/j.enconman.2016.08.081
  16. Macek, K., Endel, P., Cauchi, N., & Abate, A. (2017). Long-term predictive maintenance: A study of optimal cleaning of biomass boilers. Energy and Buildings, 150, 111–117. https://doi.org/10.1016/j.enbuild.2017.05.055
  17. Patro, B. (2016). Efficiency studies of combination tube boilers. Alexandria Engineering Journal, 55(1), 193–202. https://doi.org/10.1016/j.aej.2015.12.007
  18. Pestaño, L. D. B., & Jose, W. I. (2016). Production of solid fuel by torrefaction using coconut leaves as renewable biomass. International Journal of Renewable Energy Development, 5(3), 187–197. https://doi.org/10.14710/ijred.5.3187-197
  19. Pezzuolo, A., Benato, A., Stoppato, A., & Mirandola, A. (2016). Fluid Selection and Plant Configuration of an ORC-biomass fed System Generating Heat and/or Power. Energy Procedia, 101, 822–829. https://doi.org/10.1016/j.egypro.2016.11.104
  20. Prando, D., Boschiero, M., Campana, D., Gallo, R., Vakalis, S., Baratieri, M., Comiti, F., Mazzetto, F., & Zerbe, S. (2016). Assessment of different feedstocks in South Tyrol (Northern Italy): Energy potential and suitability for domestic pellet boilers. Biomass and Bioenergy, 90, 155–162. https://doi.org/10.1016/j.biombioe.2016.03.039
  21. Romeo, L. M., & Gareta, R. (2009). Fouling control in biomass boilers. Biomass and Bioenergy, 33(5), 854–861. https://doi.org/10.1016/j.biombioe.2009.01.008
  22. Saidur, R., Abdelaziz, E. A., Demirbas, A., Hossain, M. S., & Mekhilef, S. (2011). A review on biomass as a fuel for boilers. Renewable and Sustainable Energy Reviews, 15(5), 2262–2289. https://doi.org/10.1016/j.rser.2011.02.015
  23. Samaksaman, U., & Manatura, K. (2021). Co-combustion characteristics and kinetics behavior of torrefied sugarcane bagasse and lignite. International Journal of Renewable Energy Development, 10(4), 737–746. https://doi.org/10.14710/ijred.2021.37249
  24. Sasujit, K., Nattawud Dussadee., Nigran Homdoung., Rameshprabu Ramaraj., Tenongkiat Kiatsiriroat. Waste-to-Energy Producer Gas Production from Fuel Briquette of Energy Crop in Thailand. International Energy Journal, 17, 37-46
  25. Serrano, C., Portero, H., & Monedero, E. (2013). Pine chips combustion in a 50 kW domestic biomass boiler. Fuel, 111, 564–573. https://doi.org/10.1016/j.fuel.2013.02.068
  26. Sittisun, P., Tippayawong, N., & Pang, S. (2019). Biomass gasification in a fixed bed downdraft ractor with oxygen enriched air: A modified equilibrium modeling study. Energy Procedia, 160, 317–323. https://doi.org/10.1016/j.egypro.2019.02.163
  27. Stolarski, M. J., Zaniak, M. K., Nski, K. W., Załuski, D., & Olba-Ziety, E. (2020). Willow biomass as energy feedstock: The effect of habitat, genotype and harvest rotation on thermophysical properties and elemental composition. Energies, 13(6). https://doi.org/10.3390/en13164130
  28. Sukiran, M. A., Abnisa, F., Syafiie, S., Wan Daud, W. M. A., Nasrin, A. B., Abdul Aziz, A., & Loh, S. K. (2020). Experimental and modelling study of the torrefaction of empty fruit bunches as a potential fuel for palm oil mill boilers. Biomass and Bioenergy, 136. https://doi.org/10.1016/j.biombioe.2020.105530
  29. Suntivarakorn, R., & Treedet, W. (2016). Improvement of Boiler’s Efficiency Using Heat Recovery and Automatic Combustion Control System. Energy Procedia, 100, 193–197. https://doi.org/10.1016/j.egypro.2016.10.164
  30. Szuhánszki, J., Black, S., Pranzitelli, A., Ma, L., Stanger, P. J., Ingham, D. B., & Pourkashanian, M. (2013). Evaluation of the performance of a power plant boiler firing coal, biomass and a blend under oxy-fuel conditions as a CO2 capture technique. Energy Procedia, 37, 1413–1422. https://doi.org/10.1016/j.egypro.2013.06.017
  31. Venugopal, D., Thangavelu, L., & Elumalai, N. (2019). Energy, exergy and sustainability analysis of rice husk air gasification process. Thermal Science, 23. https://doi.org/10.2298/TSCI170613068V
  32. Yang, J. H., Kim, J. E. A., Hong, J., Kim, M., Ryu, C., Kim, Y. J., Park, H. Y., & Baek, S. H. (2015). Effects of detailed operating parameters on combustion in two 500-MWe coal-fired boilers of an identical design. Fuel, 144, 145–156. https://doi.org/10.1016/j.fuel.2014.12.017
  33. Yakima County Public Works Solid Waste Division. Review of Biomass Fuels and Technologies. (2003). https://faculty.washington.edu/stevehar/Yakima_County_Biomass_Report.pdf

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