EXERGY CONTENT ANALYSIS OF SOLID WASTE GENERATED IN UNIVERSITY OF LAGOS, NIGERIA
Authors: *Salami L, Odunlami M.O, Koleola O
There is a possibility of energy recovery from heat released during solid waste incineration. Exergy is the portion of total energy embedded in solid waste that is available for conversion to useful work. This study was carried out to analyse the exergy content and simulate the power output of solid wastes generation in University of Lagos, Nigeria. The combustion heat balance of the solid wastes was determined and the exergy analysis of the heat released during combustion was done. Simulation of power output from fluidized bed incinerator was carried out at different operating efficiency values ranging between 15% and 95% with the aid of Microsoft excel version 2007. The results showed that the 18.65 tons/day of solid wastes generation in University of Lagos has a moisture content of 11.86 % and a caloric value of 15,215.53 kJ/kg. The heat released during incineration of the solid wastes and the thermal exergy transferred were 2.67 x 108 and 1.99 x108 kJ/day respectively. The energy and exergy efficiencies were found to be 94.35 % and 70.32 % respectively. The simulated power output at 15% and 95% efficiency values were 0.43 x 108 and 2.69 x 108 kJ/day respectively. The energy value of the waste can be used for power generation in University of Lagos for its sustainable development which reduces the dependence on the national grid for electricity consumption.
Affiliations: Environmental Engineering Research Unit, Department of Chemical and Polymer Engineering, Faculty of Engineering, Lagos State University, Epe, Lagos State, Nigeria
Keywords: Energy, Exergy, Simulation, Solid Wastes, University
Published date: 2018/06/30