Eventos Anais de eventos
ENCIT 2016
16th Brazilian Congress of Thermal Sciences and Engineering
Energetic and economic analysis of an internal combustion engine cogeneration system using syngas from a downdraft gasifier. Influence of different biomass materials
Submission Author:
José Ramón Copa Rey , SP
Co-Authors:
Celso Eduardo Tuna, José Luz Silveira, Elbis D´Espaux
Presenter: José Ramón Copa Rey
doi://10.26678/ABCM.ENCIT2016.CIT2016-0019
Abstract
Gasification allows thermal conversion of biomass into a syngas which can be burned in internal combustion engines (ICE). This paper presents energetic and economic analysis of different alternatives of a cogeneration system comprising a downdraft gasifier connected to an internal combustion engine and water/gas exchangers. In this study were considered two kind of biomass: wood carob and wood eucalyptus. The syngas produced is cooled in a water/gas exchanger, which produces water at 80°C, and filtered before entering ICE to generate 15kW of electric power. Exhaust gases of ICE are utilized to heat water to 80°C in a second heat exchanger. The electrical system efficiency is 21.42%, and the global efficiency varies from 44,33 % to 49.77 % for the carob and the eucalyptus respectfully. The syngas production cost is between 0.01 and 0.35 US$/kWh, the electricity production cost is among of 0.07 to 0.28 US$/kWh and the hot water production cost is in the range of 0.04 to 0.17 US$/kWh. The investment return period depends on the interest rates, for an interest rate of 8% it is between 8 to 9 years for the biomasses studied.
Keywords
Biomass gasification; internal combustion engine; Cogeneration; Energy efficiencies; economical cost.
