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Simulation of small-scale waste biomass gasification integrated power production: a comparative performance analysis for timber and wood waste

Simulation of small-scale waste biomass gasification integrated power production: a comparative performance analysis for timber and wood waste


Title: Simulation of small-scale waste biomass gasification integrated power production: a comparative performance analysis for timber and wood waste
Author: Safarian, Sahar   orcid.org/0000-0002-0409-007X
Unnthorsson, Runar   orcid.org/0000-0002-1960-0263
Richter, Christiaan   orcid.org/0000-0002-6563-4923
Date: 2020-08
Language: English
Scope: 147-152
University/Institute: Háskóli Íslands
University of Iceland
School: Verkfræði- og náttúruvísindasvið (HÍ)
School of Engineering and Natural Sciences (UI)
Department: Iðnaðarverkfræði-, vélaverkfræði- og tölvunarfræðideild (HÍ)
Faculty of Industrial Eng., Mechanical Eng. and Computer Science (HÍ)
Series: International Journal of Applied Power Engineering;9(2)
ISSN: 2252-8792
DOI: 10.11591/ijape.v9.i2.pp147-152
Subject: Electrical efficiency; Power production; Process simulation; Waste biomass gasification; Waste to energy; Lífrænn úrgangur; Lífmassi; Orkugjafar; Líkön; Gaskennd efni
URI: https://hdl.handle.net/20.500.11815/1752

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Abstract:

A simulation model for integrated waste biomass gasification with cogeneration heat and power has been developed using Aspen Plus. The model can be used as a predictive tool for optimization of the gasifier performance. The system has been modeled in four stages. Firstly, moisture content of biomass is reduced. Secondly biomass is decomposed into its elements by specifying yield distribution. Then gasification reactions have been modeled using Gibbs free energy minimization approach. Finally, power is generated through the internal combustion engine as well as heat recovery system generator. In simulation study, the operating parameters like temperature, equivalence ratio (ER) and biomass moisture content are varied over wide range and their effect on syngas composition, low heating value (LHV) and electrical efficiency (EE) are investigated. Overally, increasing temperature and decreasing ER and MC lead to improvement of the gasification performance. However, for maximum electrical efficiency, it is important to find the optimal values of operating conditions. The optimum temperature, ER and MC of the down draft gasifier for timber and wood waste are 800˚C, 0.2-0.3 and 5%. At such optimum conditions, CO and H2 reach to the highest production and LHV and EE are around 7.064 MJ Nm-3 and 45%, respectively.

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Tihis work is licenced under a Creative Commons Attribution-NonComercial 4.0 International Licence

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