Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Thermodynamic Analysis of an Organic Rankine Cycle Using the Burning of the Açaí Seed as Heat Source
Submission Author:
Arleilson de Castro Cavalcante , AM
Co-Authors:
Arleilson de Castro Cavalcante
Presenter: Arleilson de Castro Cavalcante
doi://10.26678/ABCM.COBEM2017.COB17-1339
Abstract
In Amazonas State, one of the fruits most consumed by the population is the açaí, whose cultivation makes possible important economic activities for the region, involving traditional populations and local businesses. However, only the pulp of the fruit is commercially exploited, being their seeds dumped into landfills. Researches have shown that the seed of açaí has great energy potential, with a Lower Heating Value equal to 3705 kcal/kg, and can be compared to others biomass used as fuel in several types of industries. In this study, energy and exergy analyses of an Organic Rankine Cycle were performed from the burning of the açaí seed, using three working fluids: R-245fa, R-600 and R-600a. The highest results were achieved with the turbine inlet pressure equal to 1600 kPa, and the R-245fa presented the best results of the three fluids, being the values obtained for the thermal efficiency, exergetic efficiency and power generated in the turbine, equal to 12.07%, 49.82% and 5497 kW respectively. With the analysis of the exergy destruction in the equipment of the cycle, it was verified that the greater irreversibilities occur in the evaporator, due to the high operating temperatures.
Keywords
Electricity generation, Organic Rankine Cycle, Biomass, Açaí
