Combustion Simulation of an Exhaust Gas Recirculation Operated Micro-gas Turbine

2009 ◽  
Vol 131 (5) ◽  
Author(s):  
Maria Cristina Cameretti ◽  
Renzo Piazzesi ◽  
Fabrizio Reale ◽  
Raffaele Tuccillo
Keyword(s):  
Gas Turbine ◽  
Nox Reduction ◽  
Exhaust Gas Recirculation ◽  
Point Of View ◽  
Exhaust Gas ◽  
Micro Gas Turbine ◽  
Computational Fluid Dynamics Analysis ◽  
Combustion Simulation ◽  
Chemically Reacting ◽  
Gas Recirculation

Following their recent experiences in the search of methods for reducing the nitric oxide emissions from a micro-gas turbine, the authors discuss in this paper the results of the combustion simulation under different conditions induced by the activation of an exhaust recirculation system. The theoretical approach starts with a matching analysis of the exhaust gas recirculation equipped microturbine, and then proceeds with the computational fluid dynamics analysis of the combustor. Different combustion models are compared in order to validate the method for NOx reduction by the point of view of a correct development of the chemically reacting process.

Combustion Simulation of an EGR Operated Micro-Gas Turbine

2008 ◽  
Author(s):  
Maria Cristina Cameretti ◽  
Renzo Piazzesi ◽  
Fabrizio Reale ◽  
Raffaele Tuccillo
Keyword(s):  
Gas Turbine ◽  
Nox Reduction ◽  
Point Of View ◽  
Cfd Analysis ◽  
Micro Gas Turbine ◽  
Recirculation System ◽  
Combustion Simulation ◽  
Nitric Oxide Emissions ◽  
Chemically Reacting ◽  
Micro Turbine

Following their recent experiences in the search of methods for reducing the nitric oxide emissions from a micro-gas turbine, the authors discuss in this paper the results of the combustion simulation under different conditions induced by the activation of an exhaust recirculation system. The theoretical approach starts with a matching analysis of the EGR equipped micro-turbine, and then proceeds with the CFD analysis of the combustor. Different combustion models are compared in order to validate the method for NOx reduction by the point of view of a correct development of the chemically reacting process.

Study of an exhaust gas recirculation equipped micro gas turbine supplied with bio-fuels

2013 ◽  
Vol 59 (1-2) ◽  
pp. 162-173 ◽  
Author(s):  
Maria Cristina Cameretti ◽  
Raffaele Tuccillo ◽  
Renzo Piazzesi
Keyword(s):  
Gas Turbine ◽  
Exhaust Gas Recirculation ◽  
Exhaust Gas ◽  
Micro Gas Turbine ◽  
Gas Recirculation

Exhaust Gas Recirculation Performance in Dry Low Emissions Combustors

2011 ◽  
Author(s):  
A. M. Elkady ◽  
A. R. Brand ◽  
C. L. Vandervort ◽  
A. T. Evulet
Keyword(s):  
Gas Turbine ◽  
Co2 Capture ◽  
Carbon Capture ◽  
Power Plants ◽  
Nox Reduction ◽  
Co2 Concentration ◽  
Exhaust Gas Recirculation ◽  
Exhaust Gas ◽  
Low Oxygen ◽  
Gas Recirculation

In a carbon constrained world there is a need for capturing and sequestering CO2. Post-combustion carbon capture via Exhaust Gas Recirculation (EGR) is considered a feasible means of reducing emission of CO2 from power plants. Exhaust Gas Recirculation is an enabling technology for increasing the CO2 concentration within the gas turbine cycle and allow the decrease of the size of the separation plant, which in turn will enable a significant reduction in CO2 capture cost. This paper describes the experimental work performed to better understand the risks of utilizing EGR in combustors employing dry low emissions (DLE) technologies. A rig was built for exploring the capability of premixers to operate in low O2 environment, and a series of experiments in a visually accessible test rig was performed at representative aeroderivative gas turbine pressures and temperatures. Experimental results include the effect of applying EGR on operability, efficiency and emissions performance under conditions of up to 40% EGR. Findings confirm the viability of EGR for enhanced CO2 capture; In addition, we confirm benefits of NOx reduction while complying with CO emissions in DLE combustors under low oxygen content oxidizer.

scholarly journals Thermodynamic, Environmental and Economic Assessment of Exhaust Gas Recirculation for NOx Reduction in Gas Turbine Based Compressor Station

1999 ◽  
Author(s):  
K. K. Botros ◽  
G. R. Price ◽  
G. Kibrya
Keyword(s):  
Gas Turbine ◽  
Mechanical Energy ◽  
Nox Reduction ◽  
Economic Assessment ◽  
Exhaust Gas Recirculation ◽  
Simulation Software ◽  
Environmental Cost ◽  
Exhaust Gas ◽  
Compressor Station ◽  
Gas Recirculation

A thermodynamic, environmental and economic assessment of an exhaust gas recirculation (EGR) system for NOx reduction has been carried out on an RB211 gas turbine based compressor station. The configured system was evaluated using a commercial process simulation software ASPEN PLUS® for the EGR process, along with a one dimensional model for the prediction of NOx. The assessment was focused on a realistic system of 20% gas recirculation cooled 300 °C with an aerial cooler. Detailed economic analysis based on present value cost per unit mechanical energy (kWh), showed that there is no economic advantage in implementing an EGR system in an existing gas turbine based station. Although the environmental cost was lower with the EGR system, it was offset by the cost of the EGR system itself combined with the additional incremental cost of fuel due to the decrease in the thermal efficiency.

Performance Assessment of a Micro Gas Turbine Cycle With Exhaust Gas Recirculation Fueled by Biogas for Post-Combustion Carbon Capture Application

2018 ◽  
Author(s):  
Homam Nikpey Somehsaraei ◽  
Mohammad Mansouri Majoumerd ◽  
Mohsen Assadi
Keyword(s):  
Renewable Energy ◽  
Gas Turbine ◽  
Gas Turbines ◽  
Carbon Capture ◽  
Exhaust Gas Recirculation ◽  
Exhaust Gas ◽  
Micro Gas Turbine ◽  
Wide Range ◽  
Gas Recirculation ◽  
Gas Turbine Cycle

As a renewable energy source, biogas produced from anaerobic digestion seems to play an important role in the energy market. Unlike wind and solar, which are intermittent, gas turbines fueled by biogas provide dispatchable renewable energy that can be ramped up and down to match the demand. If post-combustion carbon capture systems are implemented, they can also result in negative CO2 emissions. However, one of the major challenges here is the energy needed for CO2 chemical absorption in post-combustion capture, which is closely related to the concentration of CO2 in the exhaust gas upstream of the capture unit. This paper presents an evaluation of the effects of biogas and exhaust gas recirculation use on the performance of the gas turbine cycle for post-combustion CO2 capture application. The study is based on a combined heat and power micro gas turbine, Turbec T100, delivering 100kWe. The thermodynamic model of the gas turbine has been validated against experimental data obtained from test facilities in Norway and the United Kingdom. Based on the validated model, performance calculations for the baseline micro gas turbine (fueled by natural gas), biogas-fired cases and the cycle with exhaust gas recirculation have been carried out at various operational conditions and compared together. A wide range of biogas composition with varying methane content was assumed for this study. Necessary minor modifications to fuel valves and compressor were assumed to allow the engine operation with different biogas composition. The methodology and results are fully discussed in this paper.

Experimental investigation of the impacts of selective exhaust gas recirculation on a micro gas turbine

2019 ◽  
Vol 90 ◽  
pp. 102809 ◽  
Author(s):  
Jean-Michel Bellas ◽  
Karen N. Finney ◽  
Maria Elena Diego ◽  
Derek Ingham ◽  
Mohamed Pourkashanian
Keyword(s):  
Experimental Investigation ◽  
Gas Turbine ◽  
Exhaust Gas Recirculation ◽  
Exhaust Gas ◽  
Micro Gas Turbine ◽  
Gas Recirculation

Evaluation of a Micro Gas Turbine With Post-Combustion CO2 Capture for Exhaust Gas Recirculation Potential With Two Experimentally Validated Models

2017 ◽  
Author(s):  
Homam Nikpey Somehsaraei ◽  
Usman Ali ◽  
Carolina Font-Palma ◽  
Mohammad Mansouri Majoumerd ◽  
Muhammad Akram ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Gas Turbine ◽  
Co2 Capture ◽  
Exhaust Gas Recirculation ◽  
Software Tools ◽  
Combined Cycle ◽  
Exhaust Gas ◽  
Capture Process ◽  
Micro Gas Turbine ◽  
Gas Recirculation

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.

scholarly journals CFD analysis of exhaust gas recirculation in a micro gas turbine combustor for CO 2 capture

Fuel ◽  
2016 ◽  
Vol 173 ◽  
pp. 146-154 ◽  
Author(s):  
Andrea De Santis ◽  
Derek B. Ingham ◽  
Lin Ma ◽  
Mohamed Pourkashanian
Keyword(s):  
Gas Turbine ◽  
Exhaust Gas Recirculation ◽  
Exhaust Gas ◽  
Cfd Analysis ◽  
Gas Turbine Combustor ◽  
Micro Gas Turbine ◽  
Gas Recirculation
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