The Experts below are selected from a list of 198 Experts worldwide ranked by ideXlab platform
Behnam Mohammadiivatloo - One of the best experts on this subject based on the ideXlab platform.
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stochastic optimal sizing of integrated Cryogenic Energy Storage and air liquefaction unit in microgrid
Renewable Energy, 2019Co-Authors: Ali Karimi, Behnam Mohammadiivatloo, Farshad KalavaniAbstract:Abstract This paper investigates the optimal sizing of Cryogenic Energy Storage (CES) in a microgrid (MG). Nowadays, Energy Storage units have been considered as a viable solution to solving the peak load problems and output power fluctuation of renewable Energy resources. At this paper, the CES technology has been presented as large-scale Energy Storage. In the CES process, the Cryogenic liquid (nitrogen and oxygen) is used for storing the Energy of electricity. The CES recovers electricity by expanding the cryogen liquid in peak periods. In this respect, the optimal sizing problem of adding CES to an existing air liquefaction unit (ALU) in an MG system is investigated in order to minimize Storage unit investment cost as well as the MG operation cost. The problem is modeled as a two-stage stochastic optimization problem and is solved by general algebraic modeling system, in which the pool price market, MG load and wind speed are considered as stochastic parameters.
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optimal stochastic scheduling of Cryogenic Energy Storage with wind power in the presence of a demand response program
Renewable Energy, 2019Co-Authors: Farshad Kalavani, Behnam Mohammadiivatloo, Kazem ZareAbstract:This paper provides a stochastic method to conduct the optimal scheduling of the combination of wind power and new-type large-scale Energy Storage with considering the demand response program in the electricity market. The integration of ASU and CES make the opportunity to store Energy in the form of liquid in the off-peak periods and recovering the electricity in the peak periods. The uncertainty of electricity price, load demand and wind speed considered as the stochastic model uncertain parameters. The optimal operation of wind turbine, CES, and conventional generation units, considering the stochastic models for price, demand, and wind speed, was formulated as a mixed-integer non-linear programming (MINLP) problem. The constraints of CES operation, liquid and gas product demands, and ASU production were considered in ASU-CES modeling. The startup cost, minimum on/off time constraints, ramp rate, and capacity limits were considered in the formulation of conventional power generation. The demand response (DR) program was adopted to increase the total expected profit and decrease the total operational cost. The results revealed that the application of CES to attest system containing ASU increases the total profit of power generation units and decreases the total cost of generating power to serve load demands.
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reliability assessment of generating systems containing wind power and air separation unit with Cryogenic Energy Storage
Journal of energy storage, 2018Co-Authors: Milad Zamanigargari, Farshad Kalavani, Mehdi Abapour, Behnam MohammadiivatlooAbstract:Abstract The acceptance of wind power has been increased in power systems because of environmental problems and production cost of conventional generation units. High penetration of intermittent wind power can increase risk level in power systems. The combination of Energy Storage with wind power is considered as a solution for problems of high wind integration. Energy Storage can increase the reliability of power systems with high penetration of renewable energies like wind farms. In this paper, the Cryogenic Energy Storage is used, which stores the air in the form of liquid and recover the power when it is needed. The copula theory is employed to generate correlated random variables to determine the wind speed of different locations. Also, for calculating the probability of availability of wind farm and Energy Storage system, Markov approach is adopted. Monte Carlo Simulation (MCS) method is implemented for obtaining reliability index of the system. The proposed method is verified using comprehensive simulations on Roy Billinton test system (RBTS) reliability test system considering the capacity of wind farms, level of wind penetration and size Energy Storage.
Farshad Kalavani - One of the best experts on this subject based on the ideXlab platform.
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stochastic optimal sizing of integrated Cryogenic Energy Storage and air liquefaction unit in microgrid
Renewable Energy, 2019Co-Authors: Ali Karimi, Behnam Mohammadiivatloo, Farshad KalavaniAbstract:Abstract This paper investigates the optimal sizing of Cryogenic Energy Storage (CES) in a microgrid (MG). Nowadays, Energy Storage units have been considered as a viable solution to solving the peak load problems and output power fluctuation of renewable Energy resources. At this paper, the CES technology has been presented as large-scale Energy Storage. In the CES process, the Cryogenic liquid (nitrogen and oxygen) is used for storing the Energy of electricity. The CES recovers electricity by expanding the cryogen liquid in peak periods. In this respect, the optimal sizing problem of adding CES to an existing air liquefaction unit (ALU) in an MG system is investigated in order to minimize Storage unit investment cost as well as the MG operation cost. The problem is modeled as a two-stage stochastic optimization problem and is solved by general algebraic modeling system, in which the pool price market, MG load and wind speed are considered as stochastic parameters.
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optimal stochastic scheduling of Cryogenic Energy Storage with wind power in the presence of a demand response program
Renewable Energy, 2019Co-Authors: Farshad Kalavani, Behnam Mohammadiivatloo, Kazem ZareAbstract:This paper provides a stochastic method to conduct the optimal scheduling of the combination of wind power and new-type large-scale Energy Storage with considering the demand response program in the electricity market. The integration of ASU and CES make the opportunity to store Energy in the form of liquid in the off-peak periods and recovering the electricity in the peak periods. The uncertainty of electricity price, load demand and wind speed considered as the stochastic model uncertain parameters. The optimal operation of wind turbine, CES, and conventional generation units, considering the stochastic models for price, demand, and wind speed, was formulated as a mixed-integer non-linear programming (MINLP) problem. The constraints of CES operation, liquid and gas product demands, and ASU production were considered in ASU-CES modeling. The startup cost, minimum on/off time constraints, ramp rate, and capacity limits were considered in the formulation of conventional power generation. The demand response (DR) program was adopted to increase the total expected profit and decrease the total operational cost. The results revealed that the application of CES to attest system containing ASU increases the total profit of power generation units and decreases the total cost of generating power to serve load demands.
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reliability assessment of generating systems containing wind power and air separation unit with Cryogenic Energy Storage
Journal of energy storage, 2018Co-Authors: Milad Zamanigargari, Farshad Kalavani, Mehdi Abapour, Behnam MohammadiivatlooAbstract:Abstract The acceptance of wind power has been increased in power systems because of environmental problems and production cost of conventional generation units. High penetration of intermittent wind power can increase risk level in power systems. The combination of Energy Storage with wind power is considered as a solution for problems of high wind integration. Energy Storage can increase the reliability of power systems with high penetration of renewable energies like wind farms. In this paper, the Cryogenic Energy Storage is used, which stores the air in the form of liquid and recover the power when it is needed. The copula theory is employed to generate correlated random variables to determine the wind speed of different locations. Also, for calculating the probability of availability of wind farm and Energy Storage system, Markov approach is adopted. Monte Carlo Simulation (MCS) method is implemented for obtaining reliability index of the system. The proposed method is verified using comprehensive simulations on Roy Billinton test system (RBTS) reliability test system considering the capacity of wind farms, level of wind penetration and size Energy Storage.
Il Moon - One of the best experts on this subject based on the ideXlab platform.
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Novel massive thermal Energy Storage system for liquefied natural gas cold Energy recovery
Energy, 2020Co-Authors: Jinwoo Park, Il MoonAbstract:Abstract The concept of heat integration with Cryogenic Energy Storage (CES) is a possible option for the recovery of wasted cold Energy from liquefied natural gas (LNG). For maximizing Energy Storage capacity, we propose a conceptual design for a massive Cryogenic Energy Storage system integrated with the LNG regasification process (MCES). The novel aspect of this study is the transmission of LNG cold Energy via two different methods at different times: (1) MCES stores cold Energy in liquid propane during on-peak times, enabling increase in the Energy Storage capacity; and (2) MCES directly transfers cold Energy with help of liquid propane during off-peak times to liquefy air using surplus electricity from the grid. Thus, the surplus Energy is stored in liquefied air and released to generate electricity on demand. Based on the process simulation, exergy analysis and economic evaluations are conducted. MCES exhibits a round trip efficiency of 85.1%, whereas existing bulk power management systems exhibit a maximum efficiency of 75%. Moreover, using a three-million-ton-per-annum LNG regasification plant, MCES enables the supply of 138 MW of electrical power which is up to 96% more power than that achieved by other recently proposed process designs, and has potential for bulk power management.
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a novel Cryogenic Energy Storage system with lng direct expansion regasification design Energy optimization and exergy analysis
Energy, 2019Co-Authors: Jinwoo Park, Il MoonAbstract:Abstract Recovering the remaining cold Energy from the regasification process is one of the key challenges of the overall LNG value chain. This paper aims to develop a Cryogenic Energy Storage system (CES) integrated with LNG direct expansion regasification (LNG–CES) that can recover cold Energy and store it as Cryogenic Energy using air as the working fluid. Cold Energy of LNG is available in two forms: thermal Energy by heat exchange and shaft work by expansion, while the Cryogenic Storage process requires compression and cooling. The supply and demand of LNG direct expansion and Cryogenic Energy Storage processes are well balanced. Therefore, a combined LNG–CES process to store Energy will prove efficient. This study proposes an industrial-feasible design for the LNG–CES process and Energy optimization to maximize net power output from the process. Moreover, a novel process design is proposed to recover cold Energy lost during LNG regasification more efficiently. Energy optimization results of the proposed design demonstrated an 11.04% increase in the net power generation from the feasible configuration of the base design. Additionally, the cause of this improvement was studied using thermodynamic analyses.
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Economic Process Selection of Liquefied Natural Gas Regasification: Power Generation and Energy Storage Applications
Industrial & Engineering Chemistry Research, 2019Co-Authors: Jinwoo Park, Il MoonAbstract:Liquefied natural gas (LNG) demand has been rapidly increasing due to the global need for clean Energy resources. This study analyzes and compares LNG regasification processes and technologies from the technoeconomic perspective and focuses on utilizing LNG cold Energy as an economically beneficial option. The comparative technoeconomic analyses focus on the following three process: (1) a simple LNG regasification process, which wastes LNG cold Energy; (2) an LNG regasification power plant (LPP) process, which utilizes LNG cold Energy to generate electricity; (3) an LNG regasification power plant integrated with a Cryogenic Energy Storage (LPCES) process, which utilizes LNG cold Energy to store electricity. The results indicate that the LPP process has the highest net present value of $215 million for 1 MTPA LNG regasification, whereas the simple LNG regasification process and the LPCES process are valued at $210 million and $188 million, respectively. Sensitivity analysis results show that the relative r...
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data on conceptual design of Cryogenic Energy Storage system combined with liquefied natural gas regasification process
Data in Brief, 2017Co-Authors: Jinwoo Park, Il MoonAbstract:This paper describes data of an integrated process, Cryogenic Energy Storage system combined with liquefied natural gas (LNG) regasification process. The data in this paper is associated with the article entitled "Conceptual Design and Exergy Analysis of Combined Cryogenic Energy Storage and LNG Regasification Processes: Cold and Power Integration" (Lee et al., 2017) [1]. The data includes the sensitivity case study dataset of the air flow rate and the heat exchanging feasibility data by composite curves. The data is expected to be helpful to the Cryogenic Energy process development.
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conceptual design and exergy analysis of combined Cryogenic Energy Storage and lng regasification processes cold and power integration
Energy, 2017Co-Authors: Inkyu Lee, Jinwoo Park, Il MoonAbstract:This study aims to develop an efficient Cryogenic Energy Storage (CES) process using the exergy from liquefied natural gas (LNG) regasification. While LNG has low internal Energy, it has high exergy because of its Cryogenic characteristics, and much of this exergy is wasted in the process of regasification. Thus, this work focuses on the recovery of LNG cold exergy to store Cryogenic Energy using air as a working fluid. The cold exergy of LNG is transferred in two forms: cold transfer by heat exchange to liquefy air, and shaft work transfer by direct expansion of LNG to compress the air. Thermodynamic analysis of the proposed process is carried out in three exergy flow steps: the LNG regasification step, the air liquefaction step, and the air expansion step. In addition, the proposed system has an advantage which system can store and release the Energy simultaneously. Therefore, daily produced Energy by CES system is more than double compare to the most recent contributions that have divided operation modes for Energy Storage and release. This study not only proposes an efficient Energy Storage process that can generate power flexibly but also highlights further possibilities for performance enhancement by thermodynamic analysis.
Yulong Ding - One of the best experts on this subject based on the ideXlab platform.
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Investigation on Heat Transfer Behaviour of Supercritical Nitrogen
Proceedings of the 2nd World Congress on Mechanical Chemical and Material Engineering, 2016Co-Authors: Ciprian Constantin Negoescu, Yongliang Li, Bushra Al-duri, Yulong DingAbstract:Extended Abstract A fluid above its critical temperature and pressure (Pc, Tc) is called supercritical (SCF) under which conditions the distinction between liquid and gas phases no longer exists. Due to the varied intra-molecular bonds, SCFs possess unique thermodynamic properties that are significantly different from their ambient state leading to different behavioural profiles and opening up a wide range of applications especially in the domains of Energy production, environment protection and green processes. They become green solvents for extraction, particle production and superior reaction media for a wide range of catalytic and non-catalytic reactions. The products of SCF-mediated processes are of highly improved quality (in terms of purity and production efficiency), and process economic feasibility. Supercritical nitrogen (SCN2) is frequently used in in Energy-related chemical engineering technologies such as air separation. Recently developed Cryogenic Energy Storage technology uses liquid air/nitrogen as both Energy Storage carrier and heat transfer fluid [1, 2]. However, SCN2 has the great advantages of enhanced heat transfer properties namely heat transfer coefficient and thermal conductivity, which greatly impacts the specific heat capacity. As nitrogen transfers from subcritical (compressed) to supercritical state, it experiences extreme variation of the above thermodynamic properties, creating highly rapid impact on the system behaviour. The objective of this study is to assess the influence of key parameters (heat flux, mass flux) on the heat transfer behaviour in supercritical nitrogen in the large specific heat region by employing the k-e turbulence model. More specifically this work represents a qualitative analysis of the heat transfer coefficient trend in supercritical nitrogen flowing vertically up in a 2 mm diameter tube, at a working pressure of 3.6 MPa, for mass fluxes 300, 600, 900 kg/(m2s), and heat flux from 11450 to 120000 W/m2. The simulations are conducted in 2D axis-symmetric, steady state, using the pressure-based solver in ANSYS Fluent. The results obtained highlight the heat transfer deterioration with increasing heat flux, while the Dittus-Boelter correlation for the Nu number is used as reference. For all mass and heat fluxes investigated the heat transfer coefficient trend shows a sharp increase with bulk temperature, reaching a peak near the pseudo-critical point after which there is a significant drop in values. Moreover, the magnitude of the heat transfer coefficient in the large specific region is proportional to the mass flow rate. The well-known Dittus-Boelter correlation over predicts the values around the pseudo-critical point where the extreme variation of thermo-physical properties becomes important.
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Cryogenic Energy Storage
Handbook of Clean Energy Systems, 2015Co-Authors: Yulong Ding, Dacheng Li, Yongliang Li, Jonathan Radcliffe, Yun HuangAbstract:Cryogenic Energy Storage (CES) is a large-scale Energy Storage technology that uses cryogen (liquid air/nitrogen) as a medium and also a working fluid for Energy Storage and discharging processes. During off-peak hours, when electricity is at its cheapest and demand for electricity is at its lowest, liquid air/nitrogen is produced in an air liquefaction and separation plant and stored in Cryogenic tanks close to the atmospheric pressure. During peak hours, the Cryogenic liquid is heated up using environmental heat and then superheated using other heat sources (if available). The boiling of the Cryogenic liquid will form a high pressure gas that drives an expansion device to produce shaft power or electricity. The concept of CES was first proposed by University of Newcastle upon Tyne (United Kingdom) in 1977 as an alternative to compressed air Energy Storage (CAES) technology for peak shaving in an electricity grid. Subsequently, the topic was investigated both numerically and experimentally by both industrial companies such as Mitsubishi Heavy Industries, Hitachi, Expansion Energy, and Highview Power Storage Systems and academic institutions. It is, however, the work from 2005 at the University of Leeds in collaboration with Highview Power Storage Systems that led to the world's first fully operational MWh pilot grid-connected plant. Keywords: Energy Storage; thermal system; regenerator; VPS cycle; transportation system
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Handbook of Clean Energy Systems - Cryogenic Energy Storage
Handbook of Clean Energy Systems, 2015Co-Authors: Yulong Ding, Dacheng Li, Yongliang Li, Jonathan Radcliffe, Yun HuangAbstract:Cryogenic Energy Storage (CES) is a large-scale Energy Storage technology that uses cryogen (liquid air/nitrogen) as a medium and also a working fluid for Energy Storage and discharging processes. During off-peak hours, when electricity is at its cheapest and demand for electricity is at its lowest, liquid air/nitrogen is produced in an air liquefaction and separation plant and stored in Cryogenic tanks close to the atmospheric pressure. During peak hours, the Cryogenic liquid is heated up using environmental heat and then superheated using other heat sources (if available). The boiling of the Cryogenic liquid will form a high pressure gas that drives an expansion device to produce shaft power or electricity. The concept of CES was first proposed by University of Newcastle upon Tyne (United Kingdom) in 1977 as an alternative to compressed air Energy Storage (CAES) technology for peak shaving in an electricity grid. Subsequently, the topic was investigated both numerically and experimentally by both industrial companies such as Mitsubishi Heavy Industries, Hitachi, Expansion Energy, and Highview Power Storage Systems and academic institutions. It is, however, the work from 2005 at the University of Leeds in collaboration with Highview Power Storage Systems that led to the world's first fully operational MWh pilot grid-connected plant. Keywords: Energy Storage; thermal system; regenerator; VPS cycle; transportation system
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load shifting of nuclear power plants using Cryogenic Energy Storage technology
Applied Energy, 2014Co-Authors: Yongliang Li, Dacheng Li, Xiang Wang, Yulong Ding, Shuhao WangAbstract:To balance the demand and supply at off-peak hours, nuclear power plants often have to be down-regulated particularly when the installations exceed the base load requirements. Part-load operations not only increase the electricity cost but also impose a detrimental effect on the safety and life-time of the nuclear power plants. We propose a novel solution by integrating nuclear power generation with Cryogenic Energy Storage (CES) technology to achieve an effective time shift of the electrical power output. CES stores excess electricity in the form of cryogen (liquid air/nitrogen) through an air liquefaction process at off-peak hours and recover the stored power by expanding the cryogen at peak hours. The combination of nuclear power generation and the CES technologies provides an efficient way to use thermal Energy of nuclear power plants in the power extraction process, delivering around three times the rated electrical power of the nuclear power plant at peak hours, thus effectively shaving the peak. Simulations are carried out on the proposed process, which show that the round trip efficiency of the CES is higher than 70% due to the elevated topping temperature in the superheating process and thermal efficiency is also substantially increased.
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Potential applications of thermal Energy Storage in electric power generation sector (II)
Energy Storage Science and Technology, 2013Co-Authors: Yongliang Li, Yi Jin, Caixia Wang, Dacheng Li, Yun Huang, Xiang Wang, Feng Ye, Yulong DingAbstract:This article briefly introduces four potential thermal Energy Storage (TES) applications in electric power generation sector, including solar power generation, compressed air Energy Storage (CABS), Cryogenic Energy Storage and heat pump technology. It concludes that TES is promising in concentrated solar power (CSP) generation in the near future. Current two-tank sensible thermal Storage technology has a good overall efficiency, and is expected to play an important role particularly in power generation sector.
Jinwoo Park - One of the best experts on this subject based on the ideXlab platform.
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Novel massive thermal Energy Storage system for liquefied natural gas cold Energy recovery
Energy, 2020Co-Authors: Jinwoo Park, Il MoonAbstract:Abstract The concept of heat integration with Cryogenic Energy Storage (CES) is a possible option for the recovery of wasted cold Energy from liquefied natural gas (LNG). For maximizing Energy Storage capacity, we propose a conceptual design for a massive Cryogenic Energy Storage system integrated with the LNG regasification process (MCES). The novel aspect of this study is the transmission of LNG cold Energy via two different methods at different times: (1) MCES stores cold Energy in liquid propane during on-peak times, enabling increase in the Energy Storage capacity; and (2) MCES directly transfers cold Energy with help of liquid propane during off-peak times to liquefy air using surplus electricity from the grid. Thus, the surplus Energy is stored in liquefied air and released to generate electricity on demand. Based on the process simulation, exergy analysis and economic evaluations are conducted. MCES exhibits a round trip efficiency of 85.1%, whereas existing bulk power management systems exhibit a maximum efficiency of 75%. Moreover, using a three-million-ton-per-annum LNG regasification plant, MCES enables the supply of 138 MW of electrical power which is up to 96% more power than that achieved by other recently proposed process designs, and has potential for bulk power management.
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a novel Cryogenic Energy Storage system with lng direct expansion regasification design Energy optimization and exergy analysis
Energy, 2019Co-Authors: Jinwoo Park, Il MoonAbstract:Abstract Recovering the remaining cold Energy from the regasification process is one of the key challenges of the overall LNG value chain. This paper aims to develop a Cryogenic Energy Storage system (CES) integrated with LNG direct expansion regasification (LNG–CES) that can recover cold Energy and store it as Cryogenic Energy using air as the working fluid. Cold Energy of LNG is available in two forms: thermal Energy by heat exchange and shaft work by expansion, while the Cryogenic Storage process requires compression and cooling. The supply and demand of LNG direct expansion and Cryogenic Energy Storage processes are well balanced. Therefore, a combined LNG–CES process to store Energy will prove efficient. This study proposes an industrial-feasible design for the LNG–CES process and Energy optimization to maximize net power output from the process. Moreover, a novel process design is proposed to recover cold Energy lost during LNG regasification more efficiently. Energy optimization results of the proposed design demonstrated an 11.04% increase in the net power generation from the feasible configuration of the base design. Additionally, the cause of this improvement was studied using thermodynamic analyses.
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Economic Process Selection of Liquefied Natural Gas Regasification: Power Generation and Energy Storage Applications
Industrial & Engineering Chemistry Research, 2019Co-Authors: Jinwoo Park, Il MoonAbstract:Liquefied natural gas (LNG) demand has been rapidly increasing due to the global need for clean Energy resources. This study analyzes and compares LNG regasification processes and technologies from the technoeconomic perspective and focuses on utilizing LNG cold Energy as an economically beneficial option. The comparative technoeconomic analyses focus on the following three process: (1) a simple LNG regasification process, which wastes LNG cold Energy; (2) an LNG regasification power plant (LPP) process, which utilizes LNG cold Energy to generate electricity; (3) an LNG regasification power plant integrated with a Cryogenic Energy Storage (LPCES) process, which utilizes LNG cold Energy to store electricity. The results indicate that the LPP process has the highest net present value of $215 million for 1 MTPA LNG regasification, whereas the simple LNG regasification process and the LPCES process are valued at $210 million and $188 million, respectively. Sensitivity analysis results show that the relative r...
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data on conceptual design of Cryogenic Energy Storage system combined with liquefied natural gas regasification process
Data in Brief, 2017Co-Authors: Jinwoo Park, Il MoonAbstract:This paper describes data of an integrated process, Cryogenic Energy Storage system combined with liquefied natural gas (LNG) regasification process. The data in this paper is associated with the article entitled "Conceptual Design and Exergy Analysis of Combined Cryogenic Energy Storage and LNG Regasification Processes: Cold and Power Integration" (Lee et al., 2017) [1]. The data includes the sensitivity case study dataset of the air flow rate and the heat exchanging feasibility data by composite curves. The data is expected to be helpful to the Cryogenic Energy process development.
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conceptual design and exergy analysis of combined Cryogenic Energy Storage and lng regasification processes cold and power integration
Energy, 2017Co-Authors: Inkyu Lee, Jinwoo Park, Il MoonAbstract:This study aims to develop an efficient Cryogenic Energy Storage (CES) process using the exergy from liquefied natural gas (LNG) regasification. While LNG has low internal Energy, it has high exergy because of its Cryogenic characteristics, and much of this exergy is wasted in the process of regasification. Thus, this work focuses on the recovery of LNG cold exergy to store Cryogenic Energy using air as a working fluid. The cold exergy of LNG is transferred in two forms: cold transfer by heat exchange to liquefy air, and shaft work transfer by direct expansion of LNG to compress the air. Thermodynamic analysis of the proposed process is carried out in three exergy flow steps: the LNG regasification step, the air liquefaction step, and the air expansion step. In addition, the proposed system has an advantage which system can store and release the Energy simultaneously. Therefore, daily produced Energy by CES system is more than double compare to the most recent contributions that have divided operation modes for Energy Storage and release. This study not only proposes an efficient Energy Storage process that can generate power flexibly but also highlights further possibilities for performance enhancement by thermodynamic analysis.