Thermodynamic Analysis and Process System Comparison of the Exhaust Gas Recirculated, Steam Injected and Humidified Micro Gas Turbine

Hdl Handle:
http://hdl.handle.net/10034/600699
Title:
Thermodynamic Analysis and Process System Comparison of the Exhaust Gas Recirculated, Steam Injected and Humidified Micro Gas Turbine
Authors:
Ali, Usman; Font Palma, Carolina; Hughes, Kevin J.; Ingham, Derek B.; Ma, Lin; Pourkashanian, Mohamed
Abstract:
Stringent environmental emission regulations and continuing efforts to reduce carbon dioxide (CO2) from the energy sector, in the context of global warming, have promoted interest to improve the efficiency of power generation systems whilst reducing emissions. Further, this has led to the development of innovative gas turbine systems which either result in higher electrical efficiency or the reduction of CO2 emissions. Micro gas turbines are one of the secure, economical and environmentally viable options for power and heat generation. Here, a Turbec T100 micro gas turbine (MGT) is simulated using Aspen HYSYS® V8.4 and validated through experimental data. Due to the consistency and robustness of the steady state model developed, it is further extended to three different innovative cycles: (i) an exhaust gas recirculated (EGR) cycle, in which part of the exhaust gas is dried and re-circulated to the MGT inlet; (ii) a steam injected (STIG) cycle, and (iii) a humid air turbine (HAT) cycle. The steam and hot water are generated through the exhaust of the recuperator for the STIG and HAT cycle, respectively. Further, the steam is directly injected into the recuperator for power augmentation, while for the HAT cycle; the compressed air is saturated with water in the humid tower before entering the recuperator. This study evaluates the impact of the EGR ratio, steam to air ratio, and water to air ratio on the performance and efficiency of the system. The comparative potential for each innovative cycle is assessed by thermodynamic properties estimation of process parameters through the models developed to better understand the behavior of each cycle. The thermodynamic assessment indicates that CO2 enrichment occurs for the three innovative cycles. Further, the results indicate that the electrical efficiency increases for the STIG and HAT cycle while it decreases for the EGR cycle. In conclusion, the innovative cycles indicates the possibilities to improve the system performance and efficiency.
Affiliation:
University of Leeds
Citation:
Ali, U., Font Palma, C., Hughes, K. J., Ingham, D. B., Ma, L., & Pourkashanian, M. (2015). Thermodynamic Analysis and Process System Comparison of the Exhaust Gas Recirculated, Steam Injected and Humidified Micro Gas Turbine. ASME Turbo Expo 2015: Turbine Technical Conference and Exposition, Paper No. GT2015-42688, pp. V003T06A011; 10 pages
Publisher:
ASME Proceedings
Journal:
ASME Turbo Expo 2015: Turbine Technical Conference and Exposition
Publication Date:
15-Jun-2015
URI:
http://hdl.handle.net/10034/600699
DOI:
10.1115/GT2015-42688
Additional Links:
http://proceedings.asmedigitalcollection.asme.org/proceeding.aspx?doi=10.1115/GT2015-42688
Type:
Article; Meetings and Proceedings
Language:
en
ISBN:
9780791856673
Appears in Collections:
Chemical Engineering

Full metadata record

DC FieldValue Language
dc.contributor.authorAli, Usmanen
dc.contributor.authorFont Palma, Carolinaen
dc.contributor.authorHughes, Kevin J.en
dc.contributor.authorIngham, Derek B.en
dc.contributor.authorMa, Linen
dc.contributor.authorPourkashanian, Mohameden
dc.date.accessioned2016-03-07T11:57:42Zen
dc.date.available2016-03-07T11:57:42Zen
dc.date.issued2015-06-15en
dc.identifier.citationAli, U., Font Palma, C., Hughes, K. J., Ingham, D. B., Ma, L., & Pourkashanian, M. (2015). Thermodynamic Analysis and Process System Comparison of the Exhaust Gas Recirculated, Steam Injected and Humidified Micro Gas Turbine. ASME Turbo Expo 2015: Turbine Technical Conference and Exposition, Paper No. GT2015-42688, pp. V003T06A011; 10 pagesen
dc.identifier.isbn9780791856673en
dc.identifier.doi10.1115/GT2015-42688en
dc.identifier.urihttp://hdl.handle.net/10034/600699en
dc.description.abstractStringent environmental emission regulations and continuing efforts to reduce carbon dioxide (CO2) from the energy sector, in the context of global warming, have promoted interest to improve the efficiency of power generation systems whilst reducing emissions. Further, this has led to the development of innovative gas turbine systems which either result in higher electrical efficiency or the reduction of CO2 emissions. Micro gas turbines are one of the secure, economical and environmentally viable options for power and heat generation. Here, a Turbec T100 micro gas turbine (MGT) is simulated using Aspen HYSYS® V8.4 and validated through experimental data. Due to the consistency and robustness of the steady state model developed, it is further extended to three different innovative cycles: (i) an exhaust gas recirculated (EGR) cycle, in which part of the exhaust gas is dried and re-circulated to the MGT inlet; (ii) a steam injected (STIG) cycle, and (iii) a humid air turbine (HAT) cycle. The steam and hot water are generated through the exhaust of the recuperator for the STIG and HAT cycle, respectively. Further, the steam is directly injected into the recuperator for power augmentation, while for the HAT cycle; the compressed air is saturated with water in the humid tower before entering the recuperator. This study evaluates the impact of the EGR ratio, steam to air ratio, and water to air ratio on the performance and efficiency of the system. The comparative potential for each innovative cycle is assessed by thermodynamic properties estimation of process parameters through the models developed to better understand the behavior of each cycle. The thermodynamic assessment indicates that CO2 enrichment occurs for the three innovative cycles. Further, the results indicate that the electrical efficiency increases for the STIG and HAT cycle while it decreases for the EGR cycle. In conclusion, the innovative cycles indicates the possibilities to improve the system performance and efficiency.en
dc.language.isoenen
dc.publisherASME Proceedingsen
dc.relation.urlhttp://proceedings.asmedigitalcollection.asme.org/proceeding.aspx?doi=10.1115/GT2015-42688en
dc.subjectSteam Injectionen
dc.subjectMicro gas turbineen
dc.subjectExhaust gas recirculationen
dc.subjectHumidified cycleen
dc.titleThermodynamic Analysis and Process System Comparison of the Exhaust Gas Recirculated, Steam Injected and Humidified Micro Gas Turbineen
dc.typeArticleen
dc.typeMeetings and Proceedingsen
dc.contributor.departmentUniversity of Leedsen
dc.identifier.journalASME Turbo Expo 2015: Turbine Technical Conference and Expositionen
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