Economic, environmental and multi objective optimization of a clean tri-generation system based co-firing of natural gas and biomass: An emergy evaluation

  • Hao Feng Lin
  • , Ibrahim B. Mansir
  • , Hawzhen Fateh M. Ameen
  • , A. CHERIF
  • , Abdulkareem Abdulwahab
  • , Mahidzal Dahari
  • , Haitao Lin
  • , Ayman A. Aly
  • , Samia Nasr

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

There is a recognized need for developing the novel clean systems to solve the environmental and energy issues. In this regard, a novel tri-generation system of power, cooling and freshwater triggered by was developed. Emergy analysis was utilized for simultaneously evaluation of system from economic and environmental viewpoints. The effects of gasification temperature, combustion temperature and natural gas contribution in the input fuel to the supercritical carbon dioxide Brayton cycle were studied on system performance. Environmental loading ratio, Emergy sustainability index, Emergy investment ratio, Renewability scale, Emergy yield ratio and energy efficiency were considered as system performance indicators. Response surface methodology was utilized for four-objective optimization of the system performance. The results showed that natural gas contribution in the input fuel was the most effective parameter on system energy efficiency and increasing natural gas contribution in the input fuel resulted in improving the system energy efficiency. Maximization of Emergy sustainability index, minimization of Environmental loading ratio, minimization of Emergy investment ratio and maximization of energy efficiency were considered as the targets of the multi-objection optimization. The findings revealed that natural gas contribution in the input fuel of 1, gasification temperature of 1000 °C and combustion temperature of 1403 °C were the optimum conditions. Response surface methodology efficiently predicted the optimum outputs with errors smaller than 5%.

Original languageEnglish
Pages (from-to)289-303
Number of pages15
JournalProcess Safety and Environmental Protection
Volume173
DOIs
StatePublished - May 2023

Keywords

  • Biomass gasification
  • Emergy
  • Multi-objective optimization
  • Tri-generation system

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