Presentation on theme: "John Ward, REDT Energy Ltd. Dublin. REDT Vanadium Redox Flow Battery (VRFB) ‘Firming Up’ Wind Energy & The DECC Gigha Project in Scotland Meitheal Na Gaoithe."— Presentation transcript:
John Ward, REDT Energy Ltd. Dublin. REDT Vanadium Redox Flow Battery (VRFB) ‘Firming Up’ Wind Energy & The DECC Gigha Project in Scotland Meitheal Na Gaoithe Conference, Kilkenny
Agenda Background to the Technology Development VRFB – What is it ? Review of VRFB technology - performance at stack level and scale up to grid systems Applications in Brief & Progress to date Demonstration Project – Gigha Conclusion
VRFB – What is it ? Key features for reliability: Power and energy independent Scalable from 5kW to 10MW, with 3 to18 hours discharge duration Deep discharge capability Capable of 10,000 cycle life with minimal degradation >20 year life Partial cycles have no effect on system life Safe operation Ambient temperature, non- flammable, environmentally sound – zero emissions.
Vanadium – What is it ? The 23rd element in the periodic table Vanadium is a silverish transition metal (the valence electrons exist in more than one shell). In normal states, vanadium atoms have 23 protons, 23 electrons, and 28 neutrons. Very High Columbic Efficiency -98% 23 P 28 N Electron shells
VRFB 5kW Stack – Building block All polymer materials, high integrity sealed system Low impedance membrane electrode structure Charge/discharge ratio 1:1 5kWe nominal, 8.5kWe peak (15 mins) Future target of 15kW
Vanadium Redox Flow Battery Benefits Low LCOE >20 year life – Lowest cost over life in class – Modular from 5kW to 5MW to match loads, scale duration from hours to days – Stack life > 10,000 cycles, electrolyte indefinite life, re- usable & recyclable Performance – Deep discharge cycles, uses 100% of available capacity – Charge retention, almost indefinite in standby mode – 75-85% round trip efficiency – Partial cycles have 0 effect
Timeline of development 2000: REDT Started : Small 5kW stack developed 2012: Technology proven 2013: Large stack 1.2MWh order 2014: Low cost outsourced manufacturing JABIL R&D phase Demonstration phase Low cost manufactured product launch phase 2014: 7 units demo unit facility launch Tested quality process production R&D cost down plan : Volume production Automation Large volume R&D cost down 2013: 60kWh system in Portugal
Original 30kWh VRFB pilot system – 2011
Containerised modular VRFB system designs - standardised for volume production
ISO Standard 20’ container section – 60kW x 180kWh 12 x 5kW rated stacks per battery Insulated air flow thermal control system Argon blanketed electrolyte Safety – leakage, fire, hydrogen detection 96,000 Litres of electrolyte per container Excess electrolyte enables deep discharge
The Isle of Gigha and the Application Community owned Wind Population ~150 Tourism, Farming, Brewing Renewables potential Sub-sea cable One of the longest 11 kV feeders to mainland Remote and wild
Regional Context – The Western Isles Argyll generation severely constrained SSE cable upgrades scheduled for 2015 Test site for VRFB selected by CES
The Isle of Gigha and the Application Current position: New (4 th ) wind turbine installed - exceeds T&D limits 330 kW constrained to 225 kW at 0.85 p.f. Line capacity upgrades not yet available Lose 3 GWh over asset life Primary objective: Constrained energy recovery with on- peak dispatch Enhanced FIT benefit Opportunity to increase RE generation by 30%
VRFB Applications – Grid balancing services Typical Energy Storage application for grid peak shaving with baseload power
Parker SSD EGT Control System Parker SSD PCS working with the REDT VRFB has a system response time of less than 5m/s and can therefore perform multiple intra-cycle control functions. Electronics and cable inductance are limiting factors not the energy storage system itself.
Firm Frequency Response (FFR) Profile Gigha 105kW rated system - RoCoF
Short term operational reserve (STOR) Profile
Constrained Energy Profile – Typical day Gigha system 105kW x 1.26MWh Blue = ESS kW, Charging when negative Red = Stored energy MWh zero SOC
System Services Summary Frequency Control Voltage Control Regulation of Curtailment Arbitrage Improvement of output prediction Post demonstration stage the technology will be rolled out to other islands
Conclusions Energy storage is entering the mainstream The Technology is constantly evolving and becoming cheaper – full suite of services and dispatch for c.5 euro/Mwh REDT will be ready for large scale deployment supporting wind energy & Solar in Q Within 5 years there will be large scale deployment of distributed storage worldwide Market for storage globally is $10Bn by 2017(19), 33% of this is estimated to be flow batteries Possibility of an entirely renewable power system…?