Performance simulation on NG/O 2 combustion gas and steam mixture cycle with energy storage and CO 2 capture

Wu, Jiafeng; Chen, Yaping; Zhu, Zilong; Mei, Xianzhi; Zhang, Shaobo; Baohuai, Zhang

doi:10.1016/j.apenergy.2017.04.001

Cited by 19 publications

(3 citation statements)

References 42 publications

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“…It is assumed to be 0.5 kWh per kg of O2. Although lower values can be found in literature [20], the value of 0.5 kWh/kg is considered reasonable as it is confirmed by operators in the cryogenic industry as a conservative hypothesis. If lower values could be achieved, the system performance and efficiency would be largely improved.…”

Section: Optimization Of the Electricity Production Processmentioning

confidence: 73%

“…Concerning the phase of electrical power production, no significant improvements are expected with respect to the results obtained, unless significantly higher efficiencies of the components are considered. On the contrary, an increase of the equivalent round trip efficiency could come from an optimization of the liquefied oxygen production, where larger margins of improvement seem to be possible [20]; informal contacts with operators in the liquefied gas industry open interesting perspectives. To this regards it is necessary to perform a more detailed analysis taking into account plant size and duty cycle, as introduced in section 2.…”

Section: Discussionmentioning

confidence: 99%

“…As a first reasonable hypothesis, combustion is split in two different chambers, allowing the increase of the mean top temperature with great advantage in efficiency [20], [23] with respect to a single combustion phase.…”

Section: Figure 2 Scheme 1 Oxycombustion From Lox and Lng With Co2 Capturementioning

confidence: 99%

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Hybrid power plant for energy storage and peak shaving by liquefied oxygen and natural gas

et al. 2018

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The increasing penetration of renewable energy sources in the electricity generation scenario forces to face new challenges to achieve an effective management of the power system both in technical and economic terms. Traditional energy storage solutions, like electrochemical cells and pumped hydro energy storage appear critical in terms of economic sustainability and site-dependency. The use of compressed air as energy storage has been investigated since the 20th century, but, in its first configuration, it was affected by site constraints as pumped hydro plants do. Liquid air energy storage has the chance to overcome those limits, but the experimental studies have far reached low efficiency. However, by rising the highest cycle temperature with the addiction of fossil fuel energy, these results can be largely improved.The paper deals with the thermodynamic analysis of a hybrid system including energy storage and production based on a liquid air energy storage plant where only oxygen is liquefied, while liquefied natural gas is used as fuel. In the production phase, liquefied oxygen and natural gas react in an oxy-combustion chamber where a large amount of water is added to keep the temperature at an acceptable level by evaporation. The system does not require an external water supply since all the water needed is produced by the cycle itself, allowing the plant to be placed also in remote areas with poor water resources. At the beginning of the cycle, both the reagents are liquid at very low temperature (below -150°C) and they need heat to be gasified; a large amount of this heat can be recovered from the combustion products, which, being cooled at suitable pressure, release liquid carbon dioxide which can thus be easily separated. Optimized arrangements, compared to the performances of the best available hybrid peak plants, even with sufficiently conservative hypotheses, reach high equivalent round trip efficiencies, even higher than 90%.Hybrid systems for storage and generation of electricity help keeping the balance between power generation and demand in the electrical systems having a high share of production from variable and stochastic renewable sources (such as solar photovoltaics and wind), thus enabling the system to have a high energy and economic-financial effectiveness in providing the grid with regulation services [1], even in systems with load and generation uncertainty [2]. These systems, jointly managed with renewable generation, enable creating integrated systems able to follow a guaranteed production program and, therefore, to participate in the electricity market, overcoming the dispatching priority method used for subsidizing the generation from renewables. Key features of these integrated hybrid systems can be: have a long-term electricity storage able to compensate the production surplus for at least one day (e.g. for a photovoltaic production system) or one week (e.g. for a wind power system), i.e. from ten to hundreds of equivalent running hours at rated power;

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Section: Optimization Of the Electricity Production Processmentioning

confidence: 73%

Section: Discussionmentioning

confidence: 99%

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Hybrid power plant for energy storage and peak shaving by liquefied oxygen and natural gas

et al. 2018

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Overview on CO ₂ Emission and Capture

Gao

Wang

2022

Heterogeneous Catalysis for Sustainable Energy

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Study on the configuration of bottom cycle in natural gas combined cycle power plants integrated with oxy-fuel combustion

et al. 2018

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Performance simulation on NG/O 2 combustion gas and steam mixture cycle with energy storage and CO 2 capture

Cited by 19 publications

References 42 publications

Hybrid power plant for energy storage and peak shaving by liquefied oxygen and natural gas

Hybrid power plant for energy storage and peak shaving by liquefied oxygen and natural gas

Overview on CO ₂ Emission and Capture

Study on the configuration of bottom cycle in natural gas combined cycle power plants integrated with oxy-fuel combustion

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Performance simulation on NG/O 2 combustion gas and steam mixture cycle with energy storage and CO 2 capture

Cited by 19 publications

References 42 publications

Hybrid power plant for energy storage and peak shaving by liquefied oxygen and natural gas

Hybrid power plant for energy storage and peak shaving by liquefied oxygen and natural gas

Overview on CO 2 Emission and Capture

Study on the configuration of bottom cycle in natural gas combined cycle power plants integrated with oxy-fuel combustion

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Product

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Overview on CO ₂ Emission and Capture