An external-compression air separation unit with energy storage and its thermodynamic and economic analysis

Liu, Yunong; Wang, Li; He, Xin

doi:10.1016/j.est.2022.106513

Cited by 7 publications

(3 citation statements)

References 32 publications

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“…According to the characteristics and ability of loads to participate in the demand-side response, they can be divided into three types (Liu et al, 2023).…”

Section: Demand-side Response Retrofit and Operating Costsmentioning

confidence: 99%

“…Power cost refers to the cost of power-related equipment such as inverters, while capacity cost refers to the material cost incurred in order to achieve the corresponding electrical energy storage capacity. The investment cost per year during the life cycle of the energy storage system is as follows (Xu et al, 2021;Liu et al, 2023):…”

Section: Energy Storage System Construction and Operation Costsmentioning

confidence: 99%

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Research on the cost allocation method of deep sea wind power considering carbon trading and green certificate trading

Xue,

Niu,

Chen

et al. 2024

Front. Energy Res.

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Climate change imposes tighter limits on carbon emissions, which require the development of more green electricity. Deep sea wind power has the advantages of high wind energy density, high power generation utilization hours, no land occupation, and near to power load centers for easy on-site consumption, which lead to a broad market prospect. In the foreseeable future, deep sea wind power will usher in large-scale construction and development. The initial investment and construction cost of deep sea wind power is high, subsidies are gradually decreasing, and there is a lack of full life cycle economic analysis combined with various market policies, resulting in a lack of guidance for its investment and construction. In order to promote the development of deep sea wind power, relevant cost recovery mechanisms must be found. This paper proposes a system cost allocation method based on the comparative difference method and load similarity with consideration of the transformation and operation costs of thermal power, demand-side response, and energy storage; a cost allocation method based on carbon trading and green certificate trading income is proposed; and a time sequence optimization operation simulation model is established to maximize the deep sea wind power income. A case study is proposed for a 300 MW deep sea wind farm, the results show that the cost allocation method and cost allocation model proposed in this paper have a significant effect on wind power cost recovery, and the effectiveness of the proposed method and model is verified.

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“…According to the characteristics and ability of loads to participate in the demand-side response, they can be divided into three types (Liu et al, 2023).…”

Section: Demand-side Response Retrofit and Operating Costsmentioning

confidence: 99%

Section: Energy Storage System Construction and Operation Costsmentioning

confidence: 99%

Research on the cost allocation method of deep sea wind power considering carbon trading and green certificate trading

Xue,

Niu,

Chen

et al. 2024

Front. Energy Res.

View full text Add to dashboard Cite

show abstract

“…The annual operation and maintenance cost is superimposed. So the annual cost of energy storage is as follows [36,37]:…”

Section: Cost Estimation Of Electrochemical Energy Storagementioning

confidence: 99%

Research on the Changing Trends in Electricity Prices in Gansu Province Considering High Future Penetration of Sustainable Energy

Huang,

Wang,

Liang

et al. 2024

Sustainability

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Carbon peaking and carbon neutrality goals have put forward new requirements for the development of sustainable energy. As an important part of the energy system, the power system plays an important role in achieving sustainable energy development. Future power systems will be sustainable, with a high proportion of renewable energy such as photovoltaic and wind power. With advancements in technology and the sustainable development of power systems, the construction costs of wind power, photovoltaics, and other renewable energy sources will continue to decline. At the same time, in order to cope with the uncertainty of renewable energy, more flexible resources need to be built. Under a high proportion of sustainable energy penetration, the utilization rate of flexible resources is low, which will lead to an increase in adjustment costs. Economic issues have an important impact on the development of new power systems, and power system construction will in turn affect social and economic development. Therefore, it is necessary to analyze changing trends in electricity prices in the process of power system sustainability from a quantitative perspective, so as to provide guidance for future planning. In view of the above problems, this paper takes Gansu Province as an example, predicts future power installation trends, by analyzing the power system form evolution, and uses production operation simulation technology to determine the power generation and consumption situation. On this basis, the costs of various power supplies and power grids are calculated, and trends in electricity prices in Gansu Province are forecast.

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Optimizing Air Separation and LNG Cold Utilization: Energy Savings, Exergy Efficiency, and System Reliability

Shingan,

Pujari,

Arya

et al. 2024

Chem Eng & Technol

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Air separation processes are time‐consuming and energy‐intensive. Most of the energy used in air separation unit (ASU) is used for air compression. During the air compression process, some energy is lost, which is converted into waste heat. This wasted energy is used to warm liquefied natural gas (LNG). At some point, LNG ships will dock at an LNG regasification facility. Here, LNG is converted back to gas and supplied to the distribution and transmission systems. During the regasification process, cryogenic LNG has a huge opportunity for cold energy recovery. An innovative air separation process that is integrated with the cold utilization of LNG is presented in this study along with a thorough conceptual design and analysis. The results of this study show that producing high‐purity oxygen and nitrogen, respectively, requires 0.28 kWh kg−1 and 0.06 kWh kg−1 of specific energies. Prior to integration with cold utilization of natural gas, 25 141.6 kW is needed for air compression. However, following integration, 10 554.6 kW of energy is needed, resulting in a 58.01 % energy savings. Exergy destruction as well as efficiency have been calculated for the primary components of the system. Sensitivity analysis is carried out to examine the effects of LNG streams on important parameters. In conclusion, a cryogenic ASU is integrated with an LNG‐direct expansion cycle‐organic Rankine cycle power cycle to supply the necessary power for operation and reduce extraneous power inputs. Overall, this integrated approach increases efficiency, lowers costs, benefits the environment, allows for flexibility and adaptability, and raises system dependability.

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An external-compression air separation unit with energy storage and its thermodynamic and economic analysis

Cited by 7 publications

References 32 publications

Research on the cost allocation method of deep sea wind power considering carbon trading and green certificate trading

Research on the cost allocation method of deep sea wind power considering carbon trading and green certificate trading

Research on the Changing Trends in Electricity Prices in Gansu Province Considering High Future Penetration of Sustainable Energy

Optimizing Air Separation and LNG Cold Utilization: Energy Savings, Exergy Efficiency, and System Reliability

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