Relevant bibliographies by topics / Critical clearing time, power system transient stability

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  1. Journal articles
  2. Dissertations / Theses
  3. Conference papers

Academic literature on the topic 'Critical clearing time, power system transient stability'

Author: Grafiati
Published: 4 June 2021
Last updated: 16 February 2022

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Journal articles on the topic "Critical clearing time, power system transient stability"

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Lin, Ming Jong. "Critical Clearing Time Associate with Relation of Power Load Factor and Frequency in Transient Stability." Applied Mechanics and Materials 743 (March 2015): 257–62. http://dx.doi.org/10.4028/www.scientific.net/amm.743.257.

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Critical clearing time is to determine the time point of the collapse of the power system when the power system occur transient stability by a huge of failure. So that the one is an important data on protection system in power system. Therefore as an electrical engineer must to look on mostly the point of one to analyze and design in the power. In this paper, through the protection relay and breaker analysis of operation to know the team of protection relay how to complete the automatic monitoring and isolated the fault-equipment in power system. To study and analyze the swing equation and equal area criterion, we found out the relation of critical clearing time is changed with power factor and frequency. The critical clearing time was verified a non-constant value which is changed with the power factor and; if the load power factor is high, the critical clearing time is high but the frequency is high, the critical clearing time is low with system swing in the transient stability. This paper will be verify below each paragraph.
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Fetissi, Selwa, Djamel Labed, and Imen Labed. "The Transient Stability Study of a Synchronous Generator Based on the Rotor Angle Stability." International Journal of Electrical and Computer Engineering (IJECE) 5, no. 6 (2015): 1319. http://dx.doi.org/10.11591/ijece.v5i6.pp1319-1327.

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Transient stability is an important aspect in the operation of electrical power system. In case of fault occurs in the system, the determining of fault clearing time of circuit breaker is considered one of the main factors to ensure power transfer of the system. This paper is aim to study the transient stability of single machine infinite bus system (SMIB), based on the rotor angle stability. The study is performed to determine the influence of the critical clearing time of the circuit breakers on the rotor angle stability of the generator in the case of three phase fault. For obtaining and determining numerically the nature of the rotor angle of machine, we applied the Step-by-step method for different values of fault clearing time. The results of simulation indicate that determine of critical clearing time is a major evaluation in stability studies. The system model is created in MATLAB/ SIMULINK software.
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Anwar, N., A. H. Hanif, H. F. Khan, and M. F. Ullah. "Transient Stability Analysis of the IEEE-9 Bus System under Multiple Contingencies." Engineering, Technology & Applied Science Research 10, no. 4 (2020): 5925–32. http://dx.doi.org/10.48084/etasr.3273.

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The determination of the transient stability of an electric power system is a crucial step in power system analysis. This paper investigates the transient stability of an IEEE-9 bus system consisting of three generators and nine buses. At first, a load flow analysis is conducted in order to determine the pre-fault conditions. Secondly, fault analysis is performed to analyze post fault conditions like the fast fault clearing time and load switching in order to determine the system stability. For transient stability analysis, Euler and Runga methods are compared and applied on the frequency and rotor angle of the system to analyze the system variations under different fault conditions. The simulations were done on the Power World Simulator (PWS) software. It is concluded that Critical Fault Clearing Time (CFCT) is a very important factor in keeping the power system within the stability bounds. A slight increase in Clearing Time (CT) from the critical value causes un-synchronism.
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Azeez, Tana Taher, and Ameen Abbas Abdelfattah. "Transient Stability Enhancement and Critical Clearing Time Improvement for Kurdistan Region Network using Fact Configuration." Journal of Engineering 26, no. 10 (2020): 50–65. http://dx.doi.org/10.31026/j.eng.2020.10.04.

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The Electrical power system has become vast and more complex, so it is subjected to sudden changes in load levels. Stability is an important concept which determines the stable operation of the power system. Transient stability analysis has become one of the significant studies in the power system to ensure the system stability to withstand a considerable disturbance. The effect of temporary occurrence can lead to malfunction of electronic control equipment. The application of flexible AC transmission systems (FACTS) devices in the transmission system have introduced several changes in the power system. These changes have a significant impact on the power system protection, due to differences inline impedance, line current and voltage. On the distance relaying protection system to identify essential issues that protection engineers need to consider during the stages of design and operation of the protection system. Transient analysis can be conducted using a simulation software package. One of the commercial simulation software package used by industry worldwide is Siemens Power System Simulation for Engineering (PSS/E). The object of this work is to improve the Transient stability and to clear critical fault times of the Kurdistan Region Government (KRG) network by using optimal FACTS devices in different optimal locations under fault conditions.
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Roberts, Lewis G. W., Alan R. Champneys, Keith R. W. Bell, and Mario di Bernardo. "Analytical Approximations of Critical Clearing Time for Parametric Analysis of Power System Transient Stability." IEEE Journal on Emerging and Selected Topics in Circuits and Systems 5, no. 3 (2015): 465–76. http://dx.doi.org/10.1109/jetcas.2015.2467111.

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Onah, Aniagboso John. "Transient Stability Analysis of a System of Two Machines Connected to an Infinite Bus." European Journal of Engineering Research and Science 3, no. 10 (2018): 81–89. http://dx.doi.org/10.24018/ejers.2018.3.10.908.

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Abstract The term large disturbance is often used in place of system collapse. It is the process by which the series of events accompanying voltage instability, frequency instability, and transient instability leads to a blackout or abnormally low voltages in a significant part of the power system. Large disturbance may be due to tripping of the lines on an account of fault or increase in load than the available supply. Transient stability deals with the effect of large and sudden disturbances in the system, while steady-state Stability deals with the effect of small disturbances in the system. Small disturbance can be a change in the gain of the automatic voltage regulator in the excitation system of a large generating unit. This paper studies the effect of a large disturbance in a power system. The system is represented by a two-machine system connected to an infinite bus. This study involves the effects of the fault on the speed of the rotor of the synchronous generator. Two cases were investigated: firstly, when fault occurred on a bus, and secondly, when fault occurred on the middle of a line. The conditions of the network before, during and after the fault are established in this paper. The equal area criterion was applied to the swing curves obtained to predict the critical clearing time of the system. The critical clearing time was found to lie between 0.20s and 0.225s if the fault occurred on the bus, and lies between 0.245s and 0.355s if the fault occurred at the middle of a line. Thus the system is more transiently stable in the second case than in the first. Machine 1 was less stable in the first case, while machine 2 was less stable in the second case. The critical clearing time is essential to the design of proper relaying schemes for fault clearing.
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Liu, Bing, Jie Meng, Zhen Yang, et al. "Exploration of the Relationship of the Voltage Critical Clearing Time and the Voltage Transient Transmission Capacity." Applied Mechanics and Materials 488-489 (January 2014): 905–9. http://dx.doi.org/10.4028/www.scientific.net/amm.488-489.905.

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Both the voltage critical clearing time (VCCT) and the voltage transient transmission capacity (VTTC) are always used to evaluate the stability of the system transient voltage, and their relationships are studied and clarified in the paper. The stability of the transient voltage is mainly depended on the dynamic reactive characteristics of load and the transmission characteristics of voltage and power. Based on the analysis on the dynamic reactive characteristics of load and the transmission characteristics of a power transmission network, the characteristics of the VCCT and the VTTC are studied in this paper. Finally, a conclusion, i.e. the margin of the VCCT and the VTTC has a nonlinear characteristic, is obtained by simulations on the actual power grid. According to the conclusion, the voltage stability cannot be exactly reflected by the VCCT margin.
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Bijang, Nathaniel L. "ANALISA WAKTU PEMUTUSAN KRITIS SUATU SISTEM KELISTRIKAN." JURNAL ILMIAH SAINS 12, no. 2 (2013): 153. http://dx.doi.org/10.35799/jis.12.2.2012.741.

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ANALISA WAKTU PEMUTUSAN KRITIS SUATU SISTEM KELISTRIKAN ABSTRAK Kestabilan adalah kemampuan mesin sinkron dari sistem tenaga listrik untuk mencapai kondisi stabil pada kondisi operasi baru yang sama atau identik dengan kondisi sebelum terjadi gangguan. Umumnya analisa kestabilan terbagi dalam dua kategori yaitu kestabilan steady state yaitu analisa sistem untuk kembali ke kondisi stabil setelah mengalami gangguan kecil dan kestabilan transient yaitu analisa sistem untuk kembali ke kondisi normal/stabil setelah mengalami gangguan besar. Studi/analisa stabilitas sangat diperlukan saat perencanaan pembangkit dan transmisi. Analisa/studi stabilitas sistem tenaga listrik membantu untuk menentukan setting waktu on/off relai proteksi , waktu pemutusan kritis circuit breaker, level tegangan dan kapasitas transfer diantara sistem-sistem. Kata kunci: Mesin sinkron, stabilitas, waktu pemutusan kritis CRITICAL CLEARING TIME ANALYSIS ELECTRICAL POWER SYSTEM ABSTRACT The stability problem is concerned with the behavior of the synchronous machines after a disturbance. Transient stability studies are needed to ensure the system can withstand the transient condition following a major disturbance. Frequently,such studies are conducted when new generating and transmitting facilities are planned. The studies are helpful in determining such things as the nature of the relaying system needed, critical clearing time of circuit breakers, voltage level of, and transfer capability between systems. Keywords: Synchronous machine, stability, critical clearing time
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Djalal, Muhammad Ruswandi, Herman Nawir, Herlambang Setiadi, and Andi Imran. "An Approach Transient Stability Analysis Using Equivalent Impedance Modified in 150 kV South of Sulawesi System." Journal of Electrical and Electronic Engineering-UMSIDA 1, no. 1 (2017): 1. http://dx.doi.org/10.21070/jeee-u.v1i1.758.

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One of methods that can be used to determine the stability of a power system if the fault occured is the equal area criterion method. The equal area criterion method (Equal Area Criterion, EAC) is an example of a direct method for predicting the stability and also the critical clearing time (Critical clearing time). However, to calculate the complex calculations required to determine the equivalent impedance of each condition system. In this study used several approaches to facilitate the calculation of the equivalent impedance. This method uses the equation of power losses. This method is equivalent impedance using modified with Ploss and Qloss for Determining Pmax. From the analysis, it can be concluded the use of this method is quite accurate in analyzing or calculating the transient stability of the generator system in South Sulawesi, with each loading condition, before, during and after short circuit. Generator being looked at is Bakaru, Pare, Suppa, Barru and Sengkang.
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Khosravi, Zinat, and Alireza Saffarian. "A New Algorithm for Protection of Small Scale Synchronous Generators Against Transient Instability." TELKOMNIKA Indonesian Journal of Electrical Engineering 16, no. 3 (2015): 454. http://dx.doi.org/10.11591/tijee.v16i3.1635.

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Today, installation of small generators has been increased because of their considerable benefits in distribution systems in distributed generation. One of the most important problems for transient stability is the effects of the faults of system. Small scale generators have low constant inertia and protection relays have slow performance in distribution systems. Therefore transient instability is a probable phenomenon for the systems with these generators. In this paper, dynamic response of generator has been studied in different fault conditions and then by introducing the concept of " critical fault clearing time ", the sensitivity of this time to the fault type and also fault location parameters have been studied. Then a new protection scheme has been proposed to prevent of transient instability for small scale generator. This protection scheme uses a new evolutionary algorithm based on the active power of generator and critical fault clearing time. The proposed relay can prevent of wrong and unwanted performance. Furthermore it can disconnect the generator from the system in three phase fault near of the bus-bar before its instability. Simulation results show reliable performance of the proposed relay against system transients.
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Dissertations / Theses on the topic "Critical clearing time, power system transient stability"

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Oztop, Celal. "Beforehand Obtaining A Safety Operation Condition By Using Daily Load Curves In Transient Stability And Graphical Software For Transient Stability Applications." Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/2/12606457/index.pdf.

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ABSTRACT In this thesis, relationship between two most important transient stability indices, critical clearing time and generator rotor angle is examined for one machine-infinite bus system and then extended to the multimachine case and is observed to be linear. By using the linear relationship between critical clearing time and generator rotor angle and utilizing the daily load curve, a new preventive method is proposed. The aim of this method is to make all critical clearing times longer than the relay and circuit breaker combination operation time. In the proposed method, desired critical clearing times are obtained by using on line system data and daily load curves. Then desired values are adjusted by generators output rescheduling and terminals voltage control Visual computer language is used for graphical and numerical solutions. Comprehension of one machine infinite bus system and multimachine system transient stability become easier.
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Kanchanaharuthai, Adirak. "Small-Signal Stability, Transient Stability and Voltage Regulation Enhancement of Power Systems with Distributed Renewable Energy Resources." Case Western Reserve University School of Graduate Studies / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=case1321988036.

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Nasri, Amin. "On the Dynamics and Statics of Power System Operation : Optimal Utilization of FACTS Devicesand Management of Wind Power Uncertainty." Doctoral thesis, KTH, Elektriska energisystem, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-154576.

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Nowadays, power systems are dealing with some new challenges raisedby the major changes that have been taken place since 80’s, e.g., deregu-lation in electricity markets, significant increase of electricity demands andmore recently large-scale integration of renewable energy resources such aswind power. Therefore, system operators must make some adjustments toaccommodate these changes into the future of power systems.One of the main challenges is maintaining the system stability since theextra stress caused by the above changes reduces the stability margin, andmay lead to rise of many undesirable phenomena. The other important chal-lenge is to cope with uncertainty and variability of renewable energy sourceswhich make power systems to become more stochastic in nature, and lesscontrollable.Flexible AC Transmission Systems (FACTS) have emerged as a solutionto help power systems with these new challenges. This thesis aims to ap-propriately utilize such devices in order to increase the transmission capacityand flexibility, improve the dynamic behavior of power systems and integratemore renewable energy into the system. To this end, the most appropriatelocations and settings of these controllable devices need to be determined.This thesis mainly looks at (i) rotor angle stability, i.e., small signal andtransient stability (ii) system operation under wind uncertainty. In the firstpart of this thesis, trajectory sensitivity analysis is used to determine themost suitable placement of FACTS devices for improving rotor angle sta-bility, while in the second part, optimal settings of such devices are foundto maximize the level of wind power integration. As a general conclusion,it was demonstrated that FACTS devices, installed in proper locations andtuned appropriately, are effective means to enhance the system stability andto handle wind uncertainty.The last objective of this thesis work is to propose an efficient solutionapproach based on Benders’ decomposition to solve a network-constrained acunit commitment problem in a wind-integrated power system. The numericalresults show validity, accuracy and efficiency of the proposed approach.<br><p>The Doctoral Degrees issued upon completion of the programme are issued by Comillas Pontifical University, Delft University of Technology and KTH Royal Institute of Technology. The invested degrees are official in Spain, the Netherlands and Sweden, respectively.QC 20141028</p>
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Le, Ha Thu. "Increasing wind power penetration and voltage stability limits using energy storage systems." Thesis, 2010. http://hdl.handle.net/2152/ETD-UT-2010-05-864.

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The research is motivated by the need to address two major challenges in wind power integration: how to mitigate wind power fluctuation and how to ensure stability of the farm and host grid. It is envisaged that wind farm power output fluctuation can be reduced by using a specific type of buffer, such as an energy storage system (ESS), to absorb its negative impact. The proposed solution, therefore, employs ESS to solve the problems. The key research findings include a new technique for calculating the desired power output profile, an ESS charge-discharge scheme, a novel direct-calculation (optimization-based) method for determining ESS optimal rating, and an ESS operation scheme for improving wind farm transient stability. Analysis with 14 wind farms and a compressed-air energy storage system (CAES) shows that the charge-discharge scheme and the desired output calculation technique are appropriate for ESS operation. The optimal ESSs for the 14 wind farms perform four or less switching operations daily (73.2%-85.5% of the 365 days) while regulating the farms output variation. On average, the ESSs carry out 2.5 to 3.1 switching operations per day. By using the direct-calculation method, an optimal ESS rating can be found for any wind farm with a high degree of accuracy. The method has a considerable advantage over traditional differential-based methods because it does not require knowledge of the analytical form of the objective function. For ESSs optimal rating, the improvement in wind energy integration is between 1.7% and 8%. In addition, a net increase in grid steady-state voltage stability of 8.3%-18.3% is achieved by 13 of the 14 evaluated ESSs. For improving wind farm transient stability, the proposed ESS operation scheme is effective. It exploits the use of a synchronous-machine-based ESS as a synchronous condenser to dynamically supply a wind farm with reactive power during faults. Analysis with an ESS and a 60-MW wind farm consisting of stall-regulated wind turbines shows that the ESS increases the farm critical clearing time (CCT) by 1 cycle for worst-case bolted three-phase-to-ground faults. For bolted single-phase-to-ground faults, the CCT is improved by 23.1%-52.2%.<br>text
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Conference papers on the topic "Critical clearing time, power system transient stability"

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Rahman, Shaikh Rashedur, Muhammad Ahad Rahman Miah, Zulkar nain Tarif, and Mst Jasmin Akter Jyoty. "Determining Critical Clearing Time in Transient Stability Assessment for Hybrid Power System." In 2019 IEEE 6th International Conference on Engineering Technologies and Applied Sciences (ICETAS). IEEE, 2019. http://dx.doi.org/10.1109/icetas48360.2019.9117282.

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Kunsong Huang. "Critical clearing time prediction by neural networks in power system transient stability analysis." In 3rd International Conference on Advances in Power System Control, Operation and Management (APSCOM 95). IEE, 1995. http://dx.doi.org/10.1049/cp:19951271.

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Krishna, D. Rama, K. V. S. Ramachandra Murthy, and G. Govinda Rao. "Application of Artificial Neural Networks in Determining Critical Clearing Time in Transient Stability Studies." In 2008 Joint International Conference on Power System Technology and IEEE Power India Conference (POWERCON). IEEE, 2008. http://dx.doi.org/10.1109/icpst.2008.4745324.

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Yorino, Naoto, Ardyono Priyadi, Yutaka Sasaki, Yoshifumi Zoka, and Hiroaki Sugihara. "A new method for direct computation of critical clearing time for transient stability analysis." In 2010 IREP Symposium - Bulk Power System Dynamics and Control - VIII (IREP). IEEE, 2010. http://dx.doi.org/10.1109/irep.2010.5563302.

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Al Marhoon, Hussain H., Ittiphong Leevongwat, and Parviz Rastgoufard. "A fast search algorithm for Critical Clearing Time for power systems transient stability analysis." In 2014 Clemson University Power Systems Conference (PSC). IEEE, 2014. http://dx.doi.org/10.1109/psc.2014.6808094.

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Lenga, Oleg. "Application of critical clearing time as a transient stability criterion for power system expansion planning." In 2014 IEEE International Conference on Intelligent Energy and Power Systems (IEPS). IEEE, 2014. http://dx.doi.org/10.1109/ieps.2014.6874182.

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Ghasemkhani, N., R. Khalili, B. Zaker, and G. B. Gharehpetian. "Effect of Synchronous Generator-Based Distributed Generation Resources on Power System Transient Stability Considering Critical Clearing Time Index." In 2018 23rd Electrical Power Distribution Conference (EPDC). IEEE, 2018. http://dx.doi.org/10.1109/epdc.2018.8536275.

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Oyekanmi, Waheed A., Ghadir Radman, Adeniyi A. Babalola, and Titus O. Ajewole. "Effects of STATCOM on the critical clearing time of faults in multi-machine power systems during transient stability analysis studies." In 2014 IEEE 6th International Conference On Adaptive Science & Technology (ICAST). IEEE, 2014. http://dx.doi.org/10.1109/icastech.2014.7068070.

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Vahedi, Nasser, and Alparslan Oztekin. "Split Flow Modified Packed Bed Reactor for Cobalt Oxide Based High-Temperature TCES Systems." In ASME 2019 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/imece2019-10740.

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Abstract The new generation of Concentrated Solar Power (CSP) plants requires high temperature and high energy density storage system with good cyclic stability. The potential solution satisfying such requirements is the thermochemical energy storage (TCES) using gas-solid redox reaction. Design of efficient storage reactor is very critical for applications of such storage systems. Packed bed reactors have a simpler design with no moving components and are more cost-effective compared to other available moving bed design configurations while having high-pressure drop is their main drawback. Any improvement in the pressure drop makes the design more suitable for commercial applications, especially at high temperature operating conditions. Cobalt oxide redox reaction has been considered for this study because of its unique features, especially high enthalpy of reaction (energy density) and high reaction temperature. A rectangular cross-section packed bed reactor with a large aspect ratio is selected as a reference conventional packed bed reactor. The novel split-flow packed bed reactor design configuration is proposed in which a portion of heat transfer fluid is passed through adjacent side channels. The split flow ratio of 1/3 has been considered for the case study. The transient two-dimensional numerical model is developed for solving mass, momentum, and energy equations for both gas and solid phases using suitable reaction kinetics for the reversible reduction and re-oxidation process. Complete storage cycle, including both the charging and discharging mode, has been simulated using finite element method. The split flow design performance is compared with the reference case considering the same size of the reaction bed. It is shown that the conversion time is increased while the pressure drop reduced below half of the pressure loss of the conventional design. Reduced mass flow rate passing through the bed results in considerable improvement in required pressure work with a penalty of storage performance. Further study is needed to optimize the split flow ratio and the surface heat transfer characteristics of the bed. The proposed design configuration could be a breakthrough in packed bed reactors, especially for high-temperature storage applications.
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