Gas Turbines for Electric Power Generation

Gülen, S. Can

doi:10.1017/9781108241625

Cited by 34 publications

(19 citation statements)

References 111 publications

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“…In this respect, the GSC-AF plant offers some additional benefits because it is the least capital intensive, and, under part-load operation, it will reduce the fraction of fuel input required from more expensive natural gas. For example, when the F-class gas turbine output reduces by a little more than 50%, the TIT falls to the GSC outlet temperature [38], thus requiring no more natural gas firing. Under these conditions, the plant can operate with only a mild turndown of the relatively inflexible gasification train, but a substantial turndown in overall plant output, saving the high natural gas fuel costs and associated CO 2 emissions.…”

Section: Sensitivity Analysismentioning

confidence: 99%

Techno-Economic Assessment of IGCC Power Plants Using Gas Switching Technology to Minimize the Energy Penalty of CO2 Capture

et al. 2021

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Cost-effective CO2 capture and storage (CCS) is critical for the rapid global decarbonization effort recommended by climate science. The increase in levelized cost of electricity (LCOE) of plants with CCS is primarily associated to the large energy penalty involved in CO2 capture. This study therefore evaluates three high-efficiency CCS concepts based on integrated gasification combined cycles (IGCC): (1) gas switching combustion (GSC), (2) GSC with added natural gas firing (GSC-AF) to increase the turbine inlet temperature, and (3) oxygen production pre-combustion (OPPC) that replaces the air separation unit (ASU) with more efficient gas switching oxygen production (GSOP) reactors. Relative to a supercritical pulverized coal benchmark, these options returned CO2 avoidance costs of 37.8, 22.4 and 37.5 €/ton (including CO2 transport and storage), respectively. Thus, despite the higher fuel cost and emissions associated with added natural gas firing, the GSC-AF configuration emerged as the most promising solution. This advantage is maintained even at CO2 prices of 100 €/ton, after which hydrogen firing can be used to avoid further CO2 cost escalations. The GSC-AF case also shows lower sensitivity to uncertain economic parameters such as discount rate and capacity factor, outperforms other clean energy benchmarks, offers flexibility benefits for balancing wind and solar power, and can achieve significant further performance gains from the use of more advanced gas turbine technology. Based on all these insights, the GSC-AF configuration is identified as a promising solution for further development.

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Section: Sensitivity Analysismentioning

confidence: 99%

Techno-Economic Assessment of IGCC Power Plants Using Gas Switching Technology to Minimize the Energy Penalty of CO2 Capture

et al. 2021

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“…For the conceptual design of H 2 -power processes at a low technology readiness level (TLR) and the current state of development, requiring tailor-made turbomachinery components to reach attractive efficiencies, the simplified approach is considered reasonable. Indeed, the reference gas turbines are taken from combined cycle applications [41,51], whose heat rate is substantially above the natural gas heat input to the plants presented in this study.…”

Section: Gspox H 2 -Power Plantmentioning

confidence: 99%

The Potential of Gas Switching Partial Oxidation Using Advanced Oxygen Carriers for Efficient H2 Production with Inherent CO2 Capture

et al. 2021

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The hydrogen economy has received resurging interest in recent years, as more countries commit to net-zero CO2 emissions around the mid-century. “Blue” hydrogen from natural gas with CO2 capture and storage (CCS) is one promising sustainable hydrogen supply option. Although conventional CO2 capture imposes a large energy penalty, advanced process concepts using the chemical looping principle can produce blue hydrogen at efficiencies even exceeding the conventional steam methane reforming (SMR) process without CCS. One such configuration is gas switching reforming (GSR), which uses a Ni-based oxygen carrier material to catalyze the SMR reaction and efficiently supply the required process heat by combusting an off-gas fuel with integrated CO2 capture. The present study investigates the potential of advanced La-Fe-based oxygen carrier materials to further increase this advantage using a gas switching partial oxidation (GSPOX) process. These materials can overcome the equilibrium limitations facing conventional catalytic SMR and achieve direct hydrogen production using a water-splitting reaction. Results showed that the GSPOX process can achieve mild efficiency improvements relative to GSR in the range of 0.6–4.1%-points, with the upper bound only achievable by large power and H2 co-production plants employing a highly efficient power cycle. These performance gains and the avoidance of toxicity challenges posed by Ni-based oxygen carriers create a solid case for the further development of these advanced materials. If successful, results from this work indicate that GSPOX blue hydrogen plants can outperform an SMR benchmark with conventional CO2 capture by more than 10%-points, both in terms of efficiency and CO2 avoidance.

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“…The membrane for H2 separation with some water gas shift catalyst to carry out the CO conversion simultaneously is extensively studied in detail with the aim of boosting the efficiency of plants with chemical looping plants, which are limited by low reactor temperatures. Also, a set of benchmark models (with and without CCS) using highly efficiency H-class turbines [28] and HGCU were developed. These issues will be presented in more detail in Chapter 4.…”

Section: Overview Of Igcc Plantsmentioning

confidence: 99%

“…The standard F-class turbine described in [6] is the baseline for the topping power cycle performance of the introductory plants. A natural gas fired model was calibrated in Unisim to meet the specifications of this turbomachine, which are described in Table 31 and are consistent for advanced turbine technology parameters given in [28]. The process model flow diagram used for the GT is depicted in Figure 75.…”

Section: F-class Gas Turbinementioning

confidence: 99%

“…The H-class GT used to model the "advanced" power plants in this assessment is representative of the technology described in [28] for these machines. The H-class GT has a substantially higher net power output than the F-class counterpart and is capable of reaching higher combustion temperatures thanks to an improved blade cooling technology with thermal barrier coatings using advanced materials and film blade cooling.…”

Section: H-class Gas Turbinementioning

confidence: 99%

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The potential of gas switching chemical looping technology to eliminate the energy penalty of CO2 capture

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Gas Turbines for Electric Power Generation

Cited by 34 publications

References 111 publications

Techno-Economic Assessment of IGCC Power Plants Using Gas Switching Technology to Minimize the Energy Penalty of CO2 Capture

Techno-Economic Assessment of IGCC Power Plants Using Gas Switching Technology to Minimize the Energy Penalty of CO2 Capture

The Potential of Gas Switching Partial Oxidation Using Advanced Oxygen Carriers for Efficient H2 Production with Inherent CO2 Capture

The potential of gas switching chemical looping technology to eliminate the energy penalty of CO2 capture

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