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Development of 10 kW/50 kWh Redox Flow Battery System for Solar PV Applications

Primary Information

Domain

Energy

Project No.

5296

Sanction and Project Initiation

Sanction No: F.NO.41-2/2015-T.S.-I (Pt.)

Sanction Date: 09/01/2017

Project Initiation date: 25/01/2017

Project Duration: 36

Partner Ministry/Agency/Industry

Ministry of New and Renewable Energy

 

Role of partner:To provide 50% funding for the project and monitor the progress of the project

 

Support from partner:No funding has been provided by the Partner and there has been no interaction with the Ministry so far

Principal Investigator

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Dr. Sreenivas Jayanti


IIT Madras

 

Host Institute

Co-PIs

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Dr. U.V. Varadaraju


IIT Madras

 

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Dr. K. S. Swarup


IIT Madras

 

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Dr. Raghunathan Rengasamy


IIT Madras

 

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Dr. L.N. Satapathy


BHEL-Bangalore

 

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Dr. D.S. Monder


IIT Bombay

 

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Dr. Raghuram Chetty


IIT Madras

 

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Dr. R. Kothandaraman


IIT Madras

 

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Dr. Vasu Gollangi


BHEL Hyderabad

 

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Dr. P.V. Suresh


NIT Warangal

 

 

Scope and Objectives

To develop a 10 kW/ 50 kWh redox flow battery-based electrical energy management system (EMS) capable of drawing electrical power from solar PVs panels or the main grid, as necessary, and deliver uninterrupted power to a community of users.

Deliverables

A prototype vanadium redox flow battery capable of storing 50 kWh of electrical energy at a power of 10 kW

 

Scientific Output

Cell level optimization of cell design completed through experimental and CFD studies of a large number of possibilities Scale-up of cell size from 100 cm2 to 900 cm2 completed Stack of 0.75 kW assembled and performance characterized

 

Results and outcome till date

At single cell level, reproducible electrochemical performance with energy efficiency of 80% or higher has been achieved in cell active areas of up to 900 cm2 Single cell configuration has been optimized to operate at a current density in excess of 100 mA/cm2 (which is twice that of commercial cells) while reducing the cell pressure drop by more than 25% compared to the baseline case A four-cell stack has been thoroughly tested and the influence of major parameters has been characterised An eight-cell stack has been built and operated but it could tested only at low current densities. The delivery of a high power battery cycler is expected in August 2018; an order for it could be ordered placed only in April 2018 due to lack of funds Long-term, continuous running of up to 150 cycles has been demonstrated with the short stack

 

Societal benefit and impact anticipated

None yet

Next steps

Scale-up of cell size to 1500 cm2 cell size (underway) Scale-up stack to 2 kW Development of power electronic modules Integration of battery with solar PV and mixed DC/AC load

Publications and reports

One journal paper published in INAE Letters (2018) : Gundlapalli, R., Kumar, S. & Jayanti, S. INAE Lett, 3(3), 149-157 (2018). https://doi.org/10.1007/s41403-018-0044-1 Two manuscripts under preparation

Patents

Under preparation

Scholars and Project Staff

Mr. Ravendra Gundlapalli (registered for PhD, IIT Madras with MHRD scholarship) Mr. Vikram Krishnan (registered for PhD, IIT Madras with MHRD scholarship) Ms A. Vijayalakshmi (employed as Project Officer) Mr. A Rajbharath (employed as Project Associate)

Challenges faced

Lack of money is the major problem; there is a 50% shortfall in funding for the first two years The project has been on negative balance for the last two months Delays in construction of new lab and implementation of GST have also caused delays in purchase of equipment and consumables.

Other information

Without the full sanction of funding, the project objectives will have to be severely curtailed. If no funding is received from the Partnering Ministry/Agency (MNRE), then the project deliverable will be limited to making one 2 kW stack and integrating it with solar PV system and DC + AC load

Financial Information

  • Total sanction: Rs. 399.84 lakhs

  • Amount received: Rs. 142.56 lakhs

  • Amount utilised for Equipment: Rs. 60.46 lakhs

  • Amount utilised for Manpower: Rs. 10.09 lakhs

  • Amount utilised for Consumables: Rs. 45.86 lakhs

  • Amount utilised for Contingency: Rs. 9.36 lakhs

  • Amount utilised for Travel: Rs. 0.27 lakhs

  • Amount utilised for Other Expenses: 0.13 lakhs

  • Amount utilised for Overheads: Rs. 21.76 lakhs

Equipment and facilities

 

Main equipment: (i) 10 V, 120 A potentiostat (ii) 60 V, 200 A battery cycler Facility created: Redox flow battery test facility

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