Biomass gasification with preheated air: Energy and exergy analysis
2012
Аутори
Karamarković, Rade M.Karamarković, Vladan
Jovović, Aleksandar
Marašević, Miljan R.
Lazarević, Anđela D.
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
Due to the irreversibilities that occur during biomass gasification, gasifiers are usually the least efficient units in the systems for production of heat, electricity, or other biofuels. Internal thermal energy exchange is responsible for a part of these irreversibilities and can be reduced by the use of preheated air as a gasifying medium. The focus of the paper is biomass gasification in the whole range of gasification temperatures by the use of air preheated with product gas sensible heat. The energetic and exergetic analyses are carried with a typical ash-free biomass feed represented by CH1.4O0.59N0.0017 at 1 and 10 bar pressure. The tool for the analyses is already validated model extended with a heat exchanger model. For every 200 K of air preheating, the average decrease of the amount of air required for complete biomass gasification is 1.3% of the amount required for its stoichiometric combustion. The air preheated to the gasification temperature on the average increases the ...lower heating value of the product gas by 13.6%, as well as energetic and exergetic efficiencies of the process. The optimal air preheating temperature is the one that causes gasification to take place at the point where all carbon is consumed. It exists only if the amount of preheated air is less than the amount of air at ambient temperature required for complete gasification at a given pressure. Exergy losses in the heat exchanger, where the product gas preheats air could be reduced by two-stage preheating.
Кључне речи:
gasification / exergy efficiency / biomass / air preheatingИзвор:
Thermal Science, 2012, 16, 2, 535-550Издавач:
- Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd
Финансирање / пројекти:
- Развој енергетски ефикасног постројења за гасификацију и когенерацију чврсте биомасе (RS-MESTD-Technological Development (TD or TR)-33027)
DOI: 10.2298/TSCI110708011K
ISSN: 0354-9836
WoS: 000306048700022
Scopus: 2-s2.0-84868624524
Колекције
Институција/група
Mašinski fakultetTY - JOUR AU - Karamarković, Rade M. AU - Karamarković, Vladan AU - Jovović, Aleksandar AU - Marašević, Miljan R. AU - Lazarević, Anđela D. PY - 2012 UR - https://machinery.mas.bg.ac.rs/handle/123456789/1381 AB - Due to the irreversibilities that occur during biomass gasification, gasifiers are usually the least efficient units in the systems for production of heat, electricity, or other biofuels. Internal thermal energy exchange is responsible for a part of these irreversibilities and can be reduced by the use of preheated air as a gasifying medium. The focus of the paper is biomass gasification in the whole range of gasification temperatures by the use of air preheated with product gas sensible heat. The energetic and exergetic analyses are carried with a typical ash-free biomass feed represented by CH1.4O0.59N0.0017 at 1 and 10 bar pressure. The tool for the analyses is already validated model extended with a heat exchanger model. For every 200 K of air preheating, the average decrease of the amount of air required for complete biomass gasification is 1.3% of the amount required for its stoichiometric combustion. The air preheated to the gasification temperature on the average increases the lower heating value of the product gas by 13.6%, as well as energetic and exergetic efficiencies of the process. The optimal air preheating temperature is the one that causes gasification to take place at the point where all carbon is consumed. It exists only if the amount of preheated air is less than the amount of air at ambient temperature required for complete gasification at a given pressure. Exergy losses in the heat exchanger, where the product gas preheats air could be reduced by two-stage preheating. PB - Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd T2 - Thermal Science T1 - Biomass gasification with preheated air: Energy and exergy analysis EP - 550 IS - 2 SP - 535 VL - 16 DO - 10.2298/TSCI110708011K ER -
@article{ author = "Karamarković, Rade M. and Karamarković, Vladan and Jovović, Aleksandar and Marašević, Miljan R. and Lazarević, Anđela D.", year = "2012", abstract = "Due to the irreversibilities that occur during biomass gasification, gasifiers are usually the least efficient units in the systems for production of heat, electricity, or other biofuels. Internal thermal energy exchange is responsible for a part of these irreversibilities and can be reduced by the use of preheated air as a gasifying medium. The focus of the paper is biomass gasification in the whole range of gasification temperatures by the use of air preheated with product gas sensible heat. The energetic and exergetic analyses are carried with a typical ash-free biomass feed represented by CH1.4O0.59N0.0017 at 1 and 10 bar pressure. The tool for the analyses is already validated model extended with a heat exchanger model. For every 200 K of air preheating, the average decrease of the amount of air required for complete biomass gasification is 1.3% of the amount required for its stoichiometric combustion. The air preheated to the gasification temperature on the average increases the lower heating value of the product gas by 13.6%, as well as energetic and exergetic efficiencies of the process. The optimal air preheating temperature is the one that causes gasification to take place at the point where all carbon is consumed. It exists only if the amount of preheated air is less than the amount of air at ambient temperature required for complete gasification at a given pressure. Exergy losses in the heat exchanger, where the product gas preheats air could be reduced by two-stage preheating.", publisher = "Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd", journal = "Thermal Science", title = "Biomass gasification with preheated air: Energy and exergy analysis", pages = "550-535", number = "2", volume = "16", doi = "10.2298/TSCI110708011K" }
Karamarković, R. M., Karamarković, V., Jovović, A., Marašević, M. R.,& Lazarević, A. D.. (2012). Biomass gasification with preheated air: Energy and exergy analysis. in Thermal Science Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd., 16(2), 535-550. https://doi.org/10.2298/TSCI110708011K
Karamarković RM, Karamarković V, Jovović A, Marašević MR, Lazarević AD. Biomass gasification with preheated air: Energy and exergy analysis. in Thermal Science. 2012;16(2):535-550. doi:10.2298/TSCI110708011K .
Karamarković, Rade M., Karamarković, Vladan, Jovović, Aleksandar, Marašević, Miljan R., Lazarević, Anđela D., "Biomass gasification with preheated air: Energy and exergy analysis" in Thermal Science, 16, no. 2 (2012):535-550, https://doi.org/10.2298/TSCI110708011K . .