access icon free Biomass based Rankine cycle, ORC and gasification system for electricity generation for isolated communities in Bonfim city, Brazil

In Brazil, specify in isolated areas, the connection to the conventional electric energy distribution grid becomes restrictied due to financial and geographical factors. Then the main option for supplying the energy demand is fossil fuel driven thermal systems. With the purpose of providing an alternative option for power generation, this study presents an analysis of biomass-based energy systems for isolated communities, in special Bonfim city, in Roraima state. The technologies applied were conventional Rankine cycle, organic Rankine cycle (ORC) and gasification system with an internal combustion engine. All systems are operated with agricultural wastes (rice straw and rice husk). The modelled systems produced electricity with a conversion efficiency of 10.78, 17.78 and 14% for ORC, conventional Rankine cycle and gasification systems, respectively. With these results and with a production of 35,667 tons of waste per year, the systems can supply the energetic demand of Bonfim city (536.40 kW). With relation to costs, currently the generation costs in isolated communities of Bonfim city are in a range of 390.31–475.85 US$/MWh. The proposed cases have a generation costs of 197.11 US$/MWh (conventional Rankine cycle), 324.77 US$/MWh (ORC) and 336.49 US$/MWh (gasification system).

Inspec keywords: bioenergy conversion; cogeneration; internal combustion engines; power grids; Rankine cycle

Other keywords: thermal systems; electricity generation; ORC; power generation; gasification system; organic Rankine cycle; rice straw; biomass-based energy systems; biomass based Rankine cycle; energy demand; power 536.4 kW; conventional electric energy distribution grid; generation costs; special Bonfim city; isolated areas; Brazil; rice husk; isolated communities

Subjects: Steam power stations and plants

http://iet.metastore.ingenta.com/content/journals/10.1049/iet-rpg.2018.5535
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content/journals/10.1049/iet-rpg.2018.5535
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