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Issue 49, 2019
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Feasibility of advancing the development of compact energy systems

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Abstract

It is necessary to advance the development of compact energy systems for making energy from biomass like wood or switchgrass, as an alternative to the construction of highly capital-intensive large scale biorefineries. Compact energy systems consist of four individual components: a biomass preparation unit, a biomass converter, a fuel processor, and a powered engine. The individual unit processes within each component and the possible types of compact energy systems with different biomass converter technologies like fermentation, pyrolysis, and gasification are presented. The size, weight, and energy efficiency of upgrading biomass to energy using a compact energy system with various gasification technologies has been estimated. A compact energy system with a hydrogen fuel cell as a powered-engine component, processing 10 kg of dry biomass per day, generates a net energy (kW h) of −7.5, −30, 18.7, 13.1, and 11.7 with the super-critical, microwave assisted, catalytic, steam, and conventional gasification technologies as biomass converter technologies, respectively. The low yields of super-critical gasification and low efficacy of converting electric energy to heat via electromagnetic waves with microwave assisted gasification result in negative net energy with the respective compact energy system. Finally, the challenges and opportunities with the development of low weight, small size, and highly energy efficient compact energy systems built around gasification are discussed.

Graphical abstract: Feasibility of advancing the development of compact energy systems

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Publication details

The article was received on 03 Aug 2019, accepted on 05 Sep 2019 and first published on 11 Sep 2019


Article type: Paper
DOI: 10.1039/C9RA06039A
RSC Adv., 2019,9, 28618-28626
  • Open access: Creative Commons BY-NC license
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    Feasibility of advancing the development of compact energy systems

    S. Gunukula, I. C. Lee and D. T. Tran, RSC Adv., 2019, 9, 28618
    DOI: 10.1039/C9RA06039A

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