A thermodynamic analysis of waste-to-energy systems using Plasma Gasification Melting technology
2012 (English)In: Air and Waste Management Association - International Conference on Thermal Treatment Technologies and Hazardous Waste Combustors 2012, 2012, 120-136 p.Conference paper (Refereed)
Plasma Gasification Melting (PGM) is a promising waste-to-energy technology which produces an inert vitrified slag and a high calorific value syngas from various solid wastes. The syngas can be either directly used as fuel to gas furnaces, or used in gas turbines after tar removal. In this work, a system model was built to calculate the energy and exergy efficiencies of PGM systems with different energy recovery options. Three PGM systems are considered: the PGM system with a steam turbine (Rankine cycle), the PGM system with a gas turbine (Brayton cycle), and the PGM system with an Integrated Gasification Combined-Cycle (IGCC). Furthermore, the effect of tar recycling on the PGM system with IGCC is also investigated. For each system, energy and exergy efficiencies at the optimal operation condition are analyzed. The results show that the PGM system with a steam turbine presents the highest overall energy efficiency, but relatively low electrical efficiency due to exergy loss in the boiler. The other two systems then suffer energy and exergy loss from tar removal in the gas cleanup section. It is also found that the recycling of removed tar into the high temperature zone of the PGM reactor can significantly increase both the electrical energy efficiency and exergy efficiency of the PGM + IGCC system.
Place, publisher, year, edition, pages
2012. 120-136 p.
Electrical energy efficiency, Energy and exergy efficiency, High temperature zones, Optimal operation conditions, Overall energy efficiency, Thermo dynamic analysis, Waste-to-energy systems, Waste-to-energy technologies
IdentifiersURN: urn:nbn:se:kth:diva-128988ScopusID: 2-s2.0-84876016723ISBN: 978-162276880-6OAI: oai:DiVA.org:kth-128988DiVA: diva2:650078
International Conference on Thermal Treatment Technologies and Hazardous Waste Combustors 2012; San Antonio, TX; United States; 21 October 2012 through 23 October 2012
QC 201309192013-09-192013-09-172013-09-19Bibliographically approved