Evaluation of a micro gas turbine with post-combustion CO2 capture for exhaust gas recirculation potential with two experimentally validated models

Somehsaraei, Homam Nikpey; Ali, Usman; Font-Palma, Carolina; Majoumerd, Mohammad Mansouri; Akram, Muhammad; Pourkashanian, Mohamed; Assadi, Mohsen

Abstract

The growing global energy demand is facing concerns raised by increasing greenhouse gas emissions, predominantly CO2. Despite substantial progress in the field of renewable energy in recent years, quick balancing responses and back-up services are still necessary to maintain the grid load and stability, due to increased penetration of intermittent renewable energy sources, such as solar and wind. In a scenario of natural gas availability, gas turbine power may be a substitute for back-up/balancing load. Rapid start-up and shut down, high ramp rate, and low emissions and maintenance have been achieved in commercial gas turbine cycles. This industry still needs innovative cycle configurations, e.g. exhaust gas recirculation (EGR), to achieve higher system performance and lower emissions in the current competitive power generation market. Together with reduced NOx emissions, EGR cycle provides an exhaust gas with higher CO2 concentration compared to the simple gas turbine/combined cycle, favorable for post-combustion carbon capture. This paper presents an evaluation of EGR potential for improved gas turbine cycle performance and integration with a post-combustion CO2 capture process. It also highlights features of two software tools with different capabilities for performance analysis of gas turbine cycles, integrated with post-combustion capture. The study is based on a combined heat and power micro gas turbine (MGT), Turbec T100, of 100kWe output. Detailed models for the baseline MGT and amine capture plant were developed in two software tools, IPSEpro and Aspen Hysys. These models were validated against experimental work conducted at the UK PACT National Core Facilities. Characteristics maps for the compressor and the turbine were used for the MGT modeling. The performance indicators of systems with and without EGR, and when varying the EGR ratio and ambient temperature, were calculated and are presented in this paper.

Citation

Somehsaraei, H. N., Ali, U., Font-Palma, C., Majoumerd, M. M., Akram, M., Pourkashanian, M., & Assadi, M. (2017, June). Evaluation of a micro gas turbine with post-combustion CO2 capture for exhaust gas recirculation potential with two experimentally validated models. Presented at ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition, Charlotte, North Carolina, USA

• Presentation Conference Type: Conference Paper (published)
• Conference Name: ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition
• Start Date: Jun 26, 2017
• End Date: Jun 30, 2017
• Acceptance Date: Sep 1, 2017
• Online Publication Date: Aug 17, 2017
• Publication Date: 2017
• Deposit Date: Feb 9, 2021
• Publisher: American Society of Mechanical Engineers
• Book Title: Proceedings of the ASME Turbo Expo 2017: Turbine Technical Conference and Exposition (GT2017). Volume 3: Coal, Biomass & Alternative Fuels; Cycle Innovations; Electric Power; Industrial & Cogeneration; Organic Rankine Cycle Power Systems
• ISBN: 978-0-7918-5083-1
• DOI: https://doi.org/10.1115/GT2017-63551
• Keywords: Carbon capture and storage, Combustion, Exhaust gas recirculation, Micro gas turbines, Cycles, Gas turbines, Emissions, Carbon dioxide, Computer software, Stress, Combined cycles, Combined heat and power, Compressors, Energy generation, Exhaust systems, M
• Public URL: https://hull-repository.worktribe.com/output/3689401
• Publisher URL: https://asmedigitalcollection.asme.org/GT/proceedings-abstract/GT2017/50831/V003T06A007/242275