Thermodynamic methodology to support the selection of feedstocks for decentralised downdraft gasification power plants
| Autor: | Juan F. Pérez, Andrés Melgar, Alfonso Horrillo |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Fluid Flow and Transfer Processes
Exergy Engineering Work (thermodynamics) Waste management Renewable Energy Sustainability and the Environment business.industry 020209 energy Process Chemistry and Technology Fuel quality Biomass 02 engineering and technology Raw material Power (physics) General Energy Fuel Technology 0202 electrical engineering electronic engineering information engineering Heat of combustion business Water content |
| Zdroj: | International Journal of Sustainable Energy. 36:1010-1028 |
| ISSN: | 1478-646X 1478-6451 |
| Popis: | Thermodynamic criteria as a feedstock selection tool for decentralised downdraft gasifiers coupled to spark-ignition engines are presented in this work. The methodology consists of an energy and exergy analysis of gasification process. The analysis is carried out by computational modelling of the gasification process as a function of biomass type (ultimate analysis, moisture content and heating value) and fuel/air ratio. Considering a system operating with different wood species, analysed parameters are gas heating value, energy and exergy efficiencies and engine fuel quality (EFQ). With a fixed fuel/air ratio (2.6) and moisture content (20%wt), it is highlighted that as the carbon-oxygen molar ratio of wood decreases from 2.0 to 1.78 as model input, reaction temperature increases by 9%, energy and exergy efficiencies diminish by 1.8% and 4.2%, respectively, while EFQ increases by 3.2%. Therefore, for decentralised power plants, biomass should be selected to produce higher EFQ. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|