||Analysis of Municipal Solid Waste Gasification Plant Integrated with SOFC and Gas Turbine
Mirandola, Alberto (Corso di Laurea Magistrale in Ingegneria Energetica, Dipartimento di Ingegneria Meccanica, Università degli Studi di Padova)
||Rokni, Masoud (Thermal Energy Systems, Department of Mechanical Engineering, Technical University of Denmark, DTU, DK-2800 Kgs. Lyngby, Denmark)
||Technical University of Denmark, DTU, DK-2800 Kgs. Lyngby, Denmark
||Biomasses are an interesting source to produce energy with low pollutants emission and reduced environmental impact; in particular to use Municipal Solid Waste as fuel can be a solution for decreasing the quantities to storage in landfills. Costs are really negligible due to the use of ―waste materials‖ to produce energy.
In this project a Municipal Solid Waste Gasification Plant Integrated with SOFC and Gas Turbine has been studied; simulations have been run using DNA (Dynamic Network Analysis) a component-based simulation tool for energy systems analysis developed at the Thermal Energy Systems department (DTU, Danmarks Tekniske Universitet).
Different plant configurations have been studied; the best one includes a Regenerative Gas Turbine. Obtained Thermodynamic Efficiency achieves 51,93% under optimized conditions.
Simulations suggest that a critical parameter to control is the fuel moisture; different configurations can be in fact realized to optimize the efficiency.
Exhausted gases coming from the plant have a high energetic content that, as studied through simulations, can be used in an Absorption Cooling System with really interesting results for the total efficiency; others internal hot flows inside the plant can be used for this aim.
Thermoeconomic Analysis of the considered plant has been developed; a system of equations has been obtained and solved through EES (Engineering Equation Solver).
Results suggest that SOFC is the most critical component not only for the irreversibility due to the chemical reactions, but in particular for the high capital cost; future decrements of the price of this component could make it more competitive on the energetic market.
However the use of a ―low-cost‖ fuel like the Municipal Solid Waste makes this plant really interesting in terms of price of the produced electricity, around 0,09 €/kWh; a comparison with the other renewable sources shows a very great vantage for this plant.
A comparison with a similar system fed by Natural Gas has also been studied; simulations show competitive results under a thermodynamic point of view, but an interesting advantage for the use of MSW Gasification under an economic point of view. The Pay-Back Time is in fact minor like the price of the produced electricity. The plant is proved to be theoretically feasible under both energetic and thermoeconomic point of view.
||DTU Mechanical Engineering
Creation date: 2011-12-01
Update date: 2011-12-01