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SPEAR (Solar Pyrolysis Energy Access Reactor): Theoretical Design and Evaluation of a Small-Scale Low-Cost Pyrolysis Unit for Implementation in Rural Communities

Author

Listed:
  • Cesare Caputo

    (Dyson School of Design Engineering, Imperial College London, Imperial College Rd, Kensington, London SW7 1AL, UK)

  • Ondřej Mašek

    (UK Biochar Research Centre, School of GeoSciences, University of Edinburgh, Crew Building, Alexander Crum, Brown Road, Edinburgh EH9 3FF, UK)

Abstract

Energy access and waste management are two of the most pressing developmental and environmental issues on a global level to help mitigate the accelerating impacts of climate change. They are particularly relevant in Sub–Saharan Africa where electrification rates are significantly below global averages and rural areas are lacking a formal waste management sector. This paper explores the potential of integrating solar energy into a biomass pyrolysis unit as a potentially synergetic solution to both issues. The full design of a slow pyrolysis batch reactor targeted at biochar production, following a strict cost minimization approach, is presented in light of the relevant considerations. SPEAR is powered using a Cassegrain optics parabolic dish system, integrated into the reactor via a manual tracking system and optically optimized with a Monte-Carlo ray tracing methodology. The design approach employed has led to the development an overall cost efficient system, with the potential to achieve optical efficiencies up 72% under a 1.5° tracking error. The outputs of the system are biochar and electricity, to be used for soil amendment and energy access purposes, respectively. There is potential to pyrolyze a number of agricultural waste streams for the region, producing at least 5 kg of biochar per unit per day depending on the feedstock employed. Financial assessment of SPEAR yields a positive Net Present Value (NPV) in nearly all scenarios evaluated and a reasonable competitiveness with small scale solar for electrification objectives. Finally, SPEAR presents important positive social and environmental externalities and should be feasibly implementable in the region in the near term.

Suggested Citation

  • Cesare Caputo & Ondřej Mašek, 2021. "SPEAR (Solar Pyrolysis Energy Access Reactor): Theoretical Design and Evaluation of a Small-Scale Low-Cost Pyrolysis Unit for Implementation in Rural Communities," Energies, MDPI, vol. 14(8), pages 1-27, April.
  • Handle: RePEc:gam:jeners:v:14:y:2021:i:8:p:2189-:d:535965
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    1. Kshirsagar, Milind P. & Kalamkar, Vilas R., 2014. "A comprehensive review on biomass cookstoves and a systematic approach for modern cookstove design," Renewable and Sustainable Energy Reviews, Elsevier, vol. 30(C), pages 580-603.
    2. Steinfeld, A. & Brack, M. & Meier, A. & Weidenkaff, A. & Wuillemin, D., 1998. "A solar chemical reactor for co-production of zinc and synthesis gas," Energy, Elsevier, vol. 23(10), pages 803-814.
    3. Mohammad I. Jahirul & Mohammad G. Rasul & Ashfaque Ahmed Chowdhury & Nanjappa Ashwath, 2012. "Biofuels Production through Biomass Pyrolysis —A Technological Review," Energies, MDPI, vol. 5(12), pages 1-50, November.
    4. Jouhara, H. & Nannou, T.K. & Anguilano, L. & Ghazal, H. & Spencer, N., 2017. "Heat pipe based municipal waste treatment unit for home energy recovery," Energy, Elsevier, vol. 139(C), pages 1210-1230.
    5. Jouhara, H. & Chauhan, A. & Nannou, T. & Almahmoud, S. & Delpech, B. & Wrobel, L.C., 2017. "Heat pipe based systems - Advances and applications," Energy, Elsevier, vol. 128(C), pages 729-754.
    6. Borchers, Allison M. & Duke, Joshua M. & Parsons, George R., 2007. "Does willingness to pay for green energy differ by source?," Energy Policy, Elsevier, vol. 35(6), pages 3327-3334, June.
    7. Mondal, Md. Alam Hossain & Bryan, Elizabeth & Ringler, Claudia & Rosegrant, Mark, 2017. "Ethiopian power sector development: Renewable based universal electricity access and export strategies," Renewable and Sustainable Energy Reviews, Elsevier, vol. 75(C), pages 11-20.
    8. Martin L. Weitzman, 2007. "A Review of the Stern Review on the Economics of Climate Change," Journal of Economic Literature, American Economic Association, vol. 45(3), pages 703-724, September.
    9. Stern,Nicholas, 2007. "The Economics of Climate Change," Cambridge Books, Cambridge University Press, number 9780521700801, October.
    10. Kan, Tao & Strezov, Vladimir & Evans, Tim J., 2016. "Lignocellulosic biomass pyrolysis: A review of product properties and effects of pyrolysis parameters," Renewable and Sustainable Energy Reviews, Elsevier, vol. 57(C), pages 1126-1140.
    11. Hirmer, Stephanie & Cruickshank, Heather, 2014. "The user-value of rural electrification: An analysis and adoption of existing models and theories," Renewable and Sustainable Energy Reviews, Elsevier, vol. 34(C), pages 145-154.
    12. Gudina Terefe Tucho & Sanderine Nonhebel, 2015. "Bio-Wastes as an Alternative Household Cooking Energy Source in Ethiopia," Energies, MDPI, vol. 8(9), pages 1-19, September.
    13. Rosnes, Orvika & Vennemo, Haakon, 2012. "The cost of providing electricity to Africa," Energy Economics, Elsevier, vol. 34(5), pages 1318-1328.
    14. Zeng, Kuo & Gauthier, Daniel & Li, Rui & Flamant, Gilles, 2015. "Solar pyrolysis of beech wood: Effects of pyrolysis parameters on the product distribution and gas product composition," Energy, Elsevier, vol. 93(P2), pages 1648-1657.
    15. Dominic Woolf & Johannes Lehmann & David R. Lee, 2016. "Optimal bioenergy power generation for climate change mitigation with or without carbon sequestration," Nature Communications, Nature, vol. 7(1), pages 1-11, December.
    16. Champier, D. & Bédécarrats, J.P. & Kousksou, T. & Rivaletto, M. & Strub, F. & Pignolet, P., 2011. "Study of a TE (thermoelectric) generator incorporated in a multifunction wood stove," Energy, Elsevier, vol. 36(3), pages 1518-1526.
    17. Yadav, Deepak & Banerjee, Rangan, 2016. "A review of solar thermochemical processes," Renewable and Sustainable Energy Reviews, Elsevier, vol. 54(C), pages 497-532.
    18. Galinato, Suzette P. & Yoder, Jonathan K. & Granatstein, David, 2011. "The economic value of biochar in crop production and carbon sequestration," Energy Policy, Elsevier, vol. 39(10), pages 6344-6350, October.
    19. Pihl, Erik & Kushnir, Duncan & Sandén, Björn & Johnsson, Filip, 2012. "Material constraints for concentrating solar thermal power," Energy, Elsevier, vol. 44(1), pages 944-954.
    20. Tian, Y. & Zhao, C.Y., 2013. "A review of solar collectors and thermal energy storage in solar thermal applications," Applied Energy, Elsevier, vol. 104(C), pages 538-553.
    21. Pereira, Emanuele Graciosa & Martins, Márcio Arêdes & Pecenka, Ralf & Carneiro, Angélica de Cássia O., 2017. "Pyrolysis gases burners: Sustainability for integrated production of charcoal, heat and electricity," Renewable and Sustainable Energy Reviews, Elsevier, vol. 75(C), pages 592-600.
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