scholarly journals Studi Kelajuan Elektrolit Terhadap Kapasitas Baterai Dinamis Asam Timbal Sel Tunggal

2020 ◽  
Vol 5 ◽  
Author(s):  
Muhammad Ghufron ◽  
Istiroyah Istiroyah ◽  
Cholisina A. Perwita ◽  
Levinus Gobay ◽  
Fakhrusy Rizki Ramadhan ◽  
...  
Keyword(s):  
Flow Rate ◽  
Flow Speed ◽  
System Capacity ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Electrolyte Flow ◽  
Battery Capacity ◽  
Number Of Cycles ◽  
Relationship Of ◽  
Discharging Capacity

<p class="AbstractEnglish"><strong>Abstract:</strong> Electrolyte flow rate is one of the important parameters on Redox Flow Battery (RFB) performance. A single cell lead acid battery has been made with the RFB system by giving 4 variations in flow speed (45 mL/min, 77 mL/min, 90 mL/min and 105 mL/min), two electrolyte concentrations (30% and 40%) and applied 1 A of charging-discharging current with the aim of an88ukmalyzing the relationship of the electrolyte flow rate of the battery to the RFB system capacity. The results showed that the flow of electrolytes from tanks outside the cell battery was able to increase battery capacity by increasing the number of spontaneous redox reactions during charging and discharging. The cycle time and battery capacity increase at the beginning of the filling-emptying cycle but have a downward trend with the increasing number of cycles. Batteries with an electrolyte concentration of 30% and speeds of 90 mL/mnt have the best performance in terms of discharging capacity compared to other batteries.</p><p class="AbstrakIndonesia"><strong>Abstrak:</strong> Laju aliran elektrolit adalah salah satu parameter penting pada kinerja Redox Flow Battery (RFB). Baterai asam timbal sel tunggal telah dibuat dengan sistem RFB dengan memberikan 4 variasi kelajuan aliran (45 mL/mnt, 77 mL/mnt, 90 mL/mnt dan 105 mL/mnt), dua konsentrasi elektrolit (30% dan 40 %) dan diterapkan 1 A arus pengisian-pemakaian dengan tujuan menganalisis hubungan laju aliran elektrolit baterai dengan kapasitas sistem RFB. Hasil penelitian menunjukkan bahwa aliran elektrolit dari tangki di luar baterai sel mampu meningkatkan kapasitas baterai dengan meningkatkan jumlah reaksi redoks spontan selama pengisian dan pemakaian. Waktu siklus dan kapasitas baterai meningkat pada awal siklus pengisian-pengosongan tetapi memiliki tren menurun dengan meningkatnya jumlah siklus. Baterai dengan konsentrasi elektrolit 30% dan kelajuan 90 mL/mnt memiliki kinerja terbaik dalam hal kapasitas pemakaian dibandingkan baterai lainnya.</p>

Unit Cell Modelling and Simulation of All Vanadium Redox Flow Battery

2017 ◽  
Vol 13 (1) ◽  
Author(s):  
Murali Mohan Seepana ◽  
Sreedevi Samudrala ◽  
P. V. Suresh ◽  
Ramsagar Vooradi
Keyword(s):  
Flow Rate ◽  
Unit Cell ◽  
Ion Concentration ◽  
Vanadium Redox Flow Battery ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Electrolyte Flow ◽  
Vanadium Concentration ◽  
Hydrogen Ion Concentration ◽  
Vanadium Redox

AbstractVanadium redox flow battery (VRFB) is one of the promising technologies for large scale renewable energy storage due to its long life time and flexible design. Electrolyte flow rate, electrolyte concentration, electrode porosity, temperature and applied magnitude of current have significant effect on the efficiency of VRFB. In the present work, a simplified dynamic lumped parameter model is developed in MATLAB to provide accurate results at unit cell level which can be used to control and optimize the parameters. The proposed model is based on the mass balance and charge conservation of various vanadium species and hydrogen ion concentration in the electrolyte. Major losses such as ohmic losses and activation losses are included in the cell potential. Recirculation of the electrolyte through external reservoirs is also considered. Numerical simulation demonstrates the effect of change in initial vanadium concentration and operating temperature on unit cell performance. It is shown that variations in electrolyte flow rate, magnitude of applied current substantially alter the charge/discharge characteristics and efficiency.

Effects of Different Working Conditions on the Performance for a New Organic Flow Battery

2015 ◽  
Vol 1092-1093 ◽  
pp. 181-184
Author(s):  
Ji Lei Li ◽  
Xin Li ◽  
Shu Zhang
Keyword(s):  
Working Conditions ◽  
Flow Rate ◽  
Discharge Voltage ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Electrolyte Flow ◽  
Flow Rates ◽  
Practical Applications ◽  
Negative Material ◽  
Battery Discharge

In this study, effects of different working conditions on a organic flow battery performance were investigated. The organic redox flow battery was assembled based on AQS as positive material and Br2/HBr as negative material. So there were no metal ions in the new battery. When the electrolyte flow rates or the currents were changed, the battery performance changed apparently. Higher flow rate can improve battery performance, while higher current can reduce the battery discharge capacity and discharge voltage. As the improvements are limited, we need choose the appropriate working conditions to get the best battery performance in practical applications.

An optimal strategy of electrolyte flow rate for vanadium redox flow battery

2012 ◽  
Vol 203 ◽  
pp. 153-158 ◽  
Author(s):  
Xiangkun Ma ◽  
Huamin Zhang ◽  
Chenxi Sun ◽  
Yi Zou ◽  
Tao Zhang
Keyword(s):  
Flow Rate ◽  
Optimal Strategy ◽  
Vanadium Redox Flow Battery ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Electrolyte Flow ◽  
Vanadium Redox

Numerical Simulation and Experiment on the Electrolyte Flow Distribution for All Vanadium Redox Flow Battery

2011 ◽  
Vol 236-238 ◽  
pp. 604-607 ◽  
Author(s):  
Jin Qing Chen ◽  
Bao Guo Wang ◽  
Hong Ling Lv
Keyword(s):  
Flow Field ◽  
Flow Distribution ◽  
Parallel Flow ◽  
Vanadium Redox Flow Battery ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Electrolyte Flow ◽  
Cfd Method ◽  
The Impact ◽  
Vanadium Redox

The electrolyte flow states of all vanadium redox flow battery (VRB) have a direct effect on the battery performance and life. To reveal the electrolyte distribution in the battery, the computation fluid dynamics (CFD) method was used to simulate a parallel flow field. A hydraulics experiment and a battery performance experiment were carried out to confirm the simulated results. The results show that the predicted information agreed well with the experimental results. The electrolyte has a concentrated distribution in the central region of the parallel flow field and the disturbed flow and then vortex flow areas mainly appear in the inlet and outlet regions. The higher flux of electrolyte is helpful to uniform the distributions and to reduce the impact of flow irregularity on the battery performance. The battery with the flow field generates a power density of 15.9 mW∙cm-2, and the coulombic, voltage and energy efficiency is up to 90.5%, 74.0% and 67.2% at a current density of 20 mA·cm-2.

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