Process Simulation and Thermodynamic Analysis of a Micro Turbine with Post-combustion CO2 Capture and Exhaust Gas Recirculation

Ali, Usman; Best, Thom; Finney, Karen N.; Font-Palma, Carolina; Hughes, Kevin J.; Ingham, D.B.; Pourkashanian, Mohamed

doi:10.1016/j.egypro.2014.11.107

Cited by 16 publications

(16 citation statements)

References 17 publications

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“…Instead of constant isentropic efficiency of the compressor and the turbine in the MGT model, characteristic maps have been used in the MGT modelling to reduce the number of assumptions that have to be made for the estimation of the isentropic efficiencies of the compressor and the turbine. The characteristic maps help in the reduction of the number of variables required to set the degree of freedom of the model to zero, as compared to the previously reported MGT models (Ali et al, 2014;Ali et al, 2015b). The details of the characteristic maps can be found in Section 2.2.2.…”

Section: Base Case Modelmentioning

confidence: 80%

“…The benefits of the EGR system are well known as it enhances the CO 2 concentration of the exhaust gas and reduces the exhaust gas flow rate (Ali et al, 2014;Ali et al, 2015b). Both of these benefits results in the reduced penalty on the integration of the amine-based carbon capture system with the natural gas-fired power generation plant in EGR mode.…”

Section: Introductionmentioning

confidence: 99%

“…The minimization of the total Gibbs free energy is used as a criterion for the chemical equilibrium in the combustor to estimate the composition of the components of the flue gas. The details of the thermodynamics of the Brayton cycle can be found in the literature (Ali et al, 2014) and therefore not repeated in this paper. Further, the property package used for the model developed for the CO 2 injection in MGT, as well as the MGT model with EGR, is the Peng-Robinson equation of state.…”

Section: Process Simulation Strategymentioning

confidence: 99%

“…Literature reports various innovations to the natural gas-fired power generation system (Heppenstall, 1998; Poullikkas, 2005); however, most of them deal with efficiency enhancement rather than the enriching of the exhaust gas with CO 2 . However, exhaust gas recirculation (Earnest, 1981) is the one of the innovative solutions in dealing with the low CO 2 concentrations in the exhaust gas from natural gas-fired power plants.The benefits of the EGR system are well known as it enhances the CO 2 concentration of the exhaust gas and reduces the exhaust gas flow rate (Ali et al, 2014;Ali et al, 2015b). Both of these benefits results in the reduced penalty on the integration of the amine-based carbon capture system with the natural gas-fired power generation plant in EGR mode.…”

mentioning

confidence: 99%

“…Regarding MGT, the impact of the EGR on the emissions and performance for different kinds of fuel by analysing through CFD modelling, is reported in the literature (Cameretti et al, 2009;Cameretti et al, 2013). It is important to note that some work on the effect of the EGR on the performance, and sensitivity analysis of the ambient temperature for the MGT with EGR have been reported in the literature (Akram et al, 2013;Ali et al, 2014;Ali et al, 2015b; Majoumerd et al, 2014; Nikpey et al, 2014). Further, the literature reports the varying optimum EGR from 40 to 55 % through different process modelling tools.…”

Section: Introductionmentioning

confidence: 99%

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Effect of the CO2 enhancement on the performance of a micro gas turbine with a pilot-scale CO2 capture plant

Ali

Hughes

Ingham

et al. 2017

Chemical Engineering Research and Design

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ReuseUnless indicated otherwise, fulltext items are protected by copyright with all rights reserved. The copyright exception in section 29 of the Copyright, Designs and Patents Act 1988 allows the making of a single copy solely for the purpose of non-commercial research or private study within the limits of fair dealing. The publisher or other rights-holder may allow further reproduction and re-use of this version -refer to the White Rose Research Online record for this item. Where records identify the publisher as the copyright holder, users can verify any specific terms of use on the publisher's website. TakedownIf you consider content in White Rose Research Online to be in breach of UK law, please notify us by emailing eprints@whiterose.ac.uk including the URL of the record and the reason for the withdrawal request.Effect of the CO 2 enhancement on the performance of a micro gas turbine with a pilot-scale CO 2 Highlights: A validated process model of the micro gas turbine is presented.  A validated CO 2 injected micro gas turbine model is presented.  EGR is evaluated as mean to enhance the CO 2 content and reduce amount of flue gas.  Effect of CO 2 enrichment on the pilot-scale CO 2 capture plant is evaluated.  Effect of CO 2 enrichment on the thermodynamic properties of turbo machinery is assessed. AbstractGas turbines are a viable and secure option both economically and environmentally for combined heat and power generation. Process modelling of a micro gas turbine for CO 2 injection and exhaust gas recirculation (EGR) is performed. Further, this study is extended to assess the effect of the CO 2 injection on the pilot-scale CO 2 capture plant integrated with a micro gas turbine. In addition, the impact of the EGR on the thermodynamic properties of the fluid at different locations of the micro gas turbine is also evaluated. The micro gas turbine and CO 2 injection models are validated against the set of experimental data and the performance analysis of the EGR cycle results in CO 2 enhancement to 5.04 mol% and 3.5 mol%, respectively. The increased CO 2 concentration in the flue gas, results in the specific reboiler duty decrease by 20.5 % for pilot-scale CO 2 capture plant at 90 % CO 2 capture rate for 30 wt. % MEA aqueous solution. The process system analysis for the validated models results in a much better comprehension of the impact of the CO 2 enhancement on the process behaviour.Keywords: Micro gas turbine; Process modelling; CO 2 injection; Exhaust gas recirculation; Specific reboiler duty. Nomenclature IntroductionThe energy trend across the globe is changing due to the overwhelming concern regarding emission of greenhouse gases from the power generation sector (IEA, 2012). The contribution of the conventional power generation system, including coal-and natural gas-power generation, is in the gradual transition stage towards more sustainable systems, as towards low or zero carbon emission emitters. However, natural gas-fired power plants are a secure and viable option both economically and e...

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Section: Base Case Modelmentioning

confidence: 80%

Section: Introductionmentioning

confidence: 99%

Section: Process Simulation Strategymentioning

confidence: 99%

mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of the CO2 enhancement on the performance of a micro gas turbine with a pilot-scale CO2 capture plant

Ali

Hughes

Ingham

et al. 2017

Chemical Engineering Research and Design

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Effect of varying fuel types on oxy‐combustion performance

Ozsari

Üst

2019

Int J Energy Res

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Summary In search for clean energy solutions in a global warming era, oxy‐fuel combustion systems are promising. In the study, combustion products are calculated, and exergy analysis is done using the proposed multifeature equilibrium combustion model. And the results obtained for oxy‐combustion of different fuels at various oxygen fractions are given in comparison with conventional combustion. For validation, the model results are compared with popular combustion calculation tools, GASEQ and CEA. Effect of oxygen content on oxy‐combustion exergy analysis is calculated, also considering changes in equivalence ratio and combustion chamber inlet temperature. Moreover, indicating parameters for combustion performance, temperature ratio, chemical exergy, physical exergy, total specific exergy, and exergy destruction are utilized in the calculations elaborately. Changes in combustion product mole fractions are explained for rich and lean combustion regions. And also, specific exergy results are presented. In terms of exergy destruction, oxy‐combustion is more advantageous than conventional combustion. It has been shown that exergy destruction in combustion process with conventional air is approximately 1.5 times higher compared with 21% oxy‐combustion, both at different equivalence ratios and at different combustion chamber inlet temperatures. Nowadays, environment‐friendly, clean energy production systems are growing in numbers. In this concept, exergetic analyses of combustion for different fuels and greener natural gas, compared with diesel, gasoline, and methanol, are given in comparison. Considering four fuel types, advantageous and disadvantageous cases are presented for oxy‐combustion at different oxygen fractions and conventional combustion. As a result, diesel fuel is more advantageous than the other three fuel types, in terms of temperature ratio and exergy. Natural gas combustion appears to be disadvantageous in terms of specific exergy and temperature ratio, but it is the most advantageous in terms of exergy destruction. Consequently, distinctive comparison is done for oxy‐combustion and conventional combustion, determining positive and negative effects for different fuels.

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Impact of the operating conditions and position of exhaust gas recirculation on the performance of a micro gas turbine

Ali

Font-Palma

Hughes

et al. 2015

12th International Symposium on Process Systems Engineering and 25th European Symposium on Computer Aided Process Engineering

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Process Simulation and Thermodynamic Analysis of a Micro Turbine with Post-combustion CO2 Capture and Exhaust Gas Recirculation

Cited by 16 publications

References 17 publications

Effect of the CO2 enhancement on the performance of a micro gas turbine with a pilot-scale CO2 capture plant

Effect of the CO2 enhancement on the performance of a micro gas turbine with a pilot-scale CO2 capture plant

Effect of varying fuel types on oxy‐combustion performance

Impact of the operating conditions and position of exhaust gas recirculation on the performance of a micro gas turbine

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