The COOPERATE — Demo power cycle

Yantovski, Evgeny

doi:10.1016/0140-6701(96)88930-2

Cited by 6 publications

(6 citation statements)

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“…Before recirculating the CO 2 back to the inlet of the initial compression system, a final cooling stage is carried out, where water is condensed and separated. 31 The MATIANT cycle described here is similar to the COOPERATE cycle proposed by Yantovski et al 129 The difference is that CO 2 entering the first oxy-fired combustor in the COOPERATE cycle is not reheated after the expansion in the high-pressure turbine. 29 Cycle efficiency values of between 35.4 and 49.3% have been reported for the MATIANT cycle, depending on the isentropic efficiency of the CO 2 compressors (varied between 65 and 90%) and the pressure achieved after the expansion in the high-pressure turbine (varied in the 40-100 bar range); these were found to be the most influential parameters.…”

Section: High-pressure Co 2 Supercritical Gas Turbinesmentioning

confidence: 78%

“…Before recirculating the CO 2 back to the inlet of the initial compression system, a final cooling stage is carried out, where water is condensed and separated . The MATIANT cycle described here is similar to the COOPERATE cycle proposed by Yantovski et al . The difference is that CO 2 entering the first oxy‐fired combustor in the COOPERATE cycle is not reheated after the expansion in the high‐pressure turbine .…”

Section: Oxy‐fired Gas Turbinesmentioning

confidence: 99%

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Making gas‐CCS a commercial reality: The challenges of scaling up

et al. 2017

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Significant reductions in CO 2 emissions are required to limit the global temperature rise to 2°C. Carbon capture and storage (CCS) is a key enabling technology that can be applied to power generation and industrial processes to lower their carbon intensity. There are, however, several challenges that such a method of decarbonization poses when used in the context of natural gas (gas-CCS), especially for solvent-based (predominantly amines) post-combustion capture. These are related to: (i) the low CO 2 partial pressure of the exhaust gases from gas-fired power plants (ß3-4%vol. CO 2 ), which substantially limits the driving force for the capture process; (ii) their high O 2 concentration (ß12-13%vol. O 2 ), which can degrade the capture media via oxidative solvent degradation; and (iii) their high volumetric flow rates, which means large capture plants are needed. Such post-combustion gas-CCS features unavoidably lead to increased CO 2 capture costs. This perspective aims to summarize the key technologies used to overcome these as a priority, including supplementary firing, humidified systems, exhaust gas recirculation and selective exhaust gas recirculation. These focus on the maximum CO 2 levels achievable for each, as well as the electrical efficiencies attainable when the capture penalty is taken into account. Oxy-turbine cycles are also discussed as an alternative to post-combustion gas-CCS, indicating the main advantages and limitations of these systems together with the expected electrical efficiencies. Furthermore, we consider the challenges for scaling-up and deployment of these technologies at a commercial level to enable gas-CCS to play a crucial role in a low-carbon future. C

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Section: High-pressure Co 2 Supercritical Gas Turbinesmentioning

confidence: 78%

Section: Oxy‐fired Gas Turbinesmentioning

confidence: 99%

Making gas‐CCS a commercial reality: The challenges of scaling up

et al. 2017

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“…LNG off-loaded from its storage (20) is first pumped by pump P L to its evaporation pressure (21), and then heated in the evaporation system (HE 4 (22) and HE 5 (23)) to near-ambient temperature. If the NG temperature at point 23 remains below that desired for distribution, the remaining coldness can be used for air conditioning or some other purposes in HE 6 .…”

Section: The Cycle Configurationmentioning

confidence: 99%

“…Besides the efforts for reduction of CO 2 emissions from existing power plants, concepts of power plants with zero CO 2 emission were proposed and studied. Particular attention has been paid to the research of trans-critical CO 2 cycle with fuel burning in highly enriched oxygen (99.5%+) and recycled CO 2 from the flue gas [16][17][18][19][20][21][22][23][24][25]. The common features of these cycles are the use of CO 2 as the working fluid and O 2 as the fuel oxidizer, produced by an air separation unit.…”

Section: Introductionmentioning

confidence: 99%

Configuration Analysis of a Novel Zero CO2 Emission Cycle With LNG Cryogenic Exergy Utilization

Zhang

Lior

2003

Advanced Energy Systems

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A novel liquefied natural gas (LNG) fueled power plant is proposed, which has virtually zero CO2 and other emissions and a high efficiency. Natural gas is fired in highly enriched oxygen and recycled CO2 flue gas. The plant operates in a quasi-combined cycle mode with a supercritical CO2 Rankine-like cycle and a CO2 Brayton cycle, interconnected by the heat transfer process in the recuperation system. By coupling with the LNG evaporation system as the cycle cold sink, the cycle condensation process can be achieved at a temperature much lower than ambient, and high-pressure liquid CO2 ready for disposal can be withdrawn from the cycle without consuming additional power. The net thermal and exergy efficiencies of a base-case cycle are found to be over 65% and 50% respectively, which can be increased up to 68% and 54% when reheat is used. Cycle variants incorporating reheat, intercooling, and reheat+intercooling, as well as no use of LNG coldness, are also defined and analyzed for comparison. The approximate heat transfer area needed for the different cycle variants is also computed. Besides electricity and condensed CO2, the byproducts of the plant are H2O, liquid N2 and Ar.

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“…The main (and the recycled) working fluid commonly used is either CO 2 or H 2 O. The systems using CO 2 include the MATIANT cycle [5,6], COOPERATE cycle [7,8] or COOLENERG cycle [9], and we have proposed systems integrated with LNG cold exergy utilization [10,11]. Those using H 2 O as the working fluid include the Water cycle [12,13] developed by Clean Energy Systems (CES), the Graz cycle [14], and others [15].…”

Section: Introductionmentioning

confidence: 99%

Two novel oxy-fuel power cycles integrated with natural gas reforming and CO2 capture

Zhang

Lior

2008

Energy

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Two novel system configurations were proposed for oxy-fuel natural gas turbine systems with integrated steam reforming and CO 2 capture and separation. The steam reforming heat is obtained from the available turbine exhaust heat, and the produced syngas is used as fuel with oxygen as the oxidizer. Internal combustion is used, which allows a very high heat input temperature. Moreover, the turbine working fluid can expand down to a vacuum, producing an overall high-pressure ratio. Particular attention was focused on the integration of the turbine exhaust heat recovery with both reforming and steam generation processes, in ways that reduce the heat transfer-related exergy destruction. The systems were thermodynamically simulated, predicting a net energy efficiency of 50-52% (with consideration of the energy needed for oxygen separation), which is higher than the Graz cycle energy efficiency by more than 2 percentage points. The improvement is attributed primarily to a decrease of the exergy change in the combustion and steam generation processes that these novel systems offer. The systems can attain a nearly 100% CO 2 capture. r

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The COOPERATE — Demo power cycle

Cited by 6 publications

References 0 publications

Making gas‐CCS a commercial reality: The challenges of scaling up

Making gas‐CCS a commercial reality: The challenges of scaling up

Configuration Analysis of a Novel Zero CO2 Emission Cycle With LNG Cryogenic Exergy Utilization

Two novel oxy-fuel power cycles integrated with natural gas reforming and CO2 capture

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