Nice bit of coverage7 May 2019 15:59
https://www.miningreview.com/battery-metals/bushveld-minerals-battery-storage/
While much of the hype around energy storage has been around lithium-ion batteries, which have a wide array of uses – for powering personal electronic devices to electric vehicles – there is a need for bigger batteries that are able to store much more energy
The VRFB is emerging as a solution to the challenge faced by the renewable energy generation sector for storing energy – as the energy is not always generated at the same time as peak demand occurs.
This means that VRFBs, which truly excel when storing energy for longer periods of time, such as three hours or more, unlike lithium-ion which prove more economically viable for energy storage over shorter periods of time, can be used to store energy for use at peak load times on conventional energy grids or when the renewable energy system is not producing energy.
For example, this would be when the sun is not shining or the wind is not blowing in the case of solar and wind power, respectively.
There are also many other suitable applications for VRFBs within the transmission and distribution network, mini and smart grids, as well as behind-the-meter applications.
Bushveld Energy’s first energy storage project, which is currently underway, entails the testing of a utility-scale VRFB at state-owned power utility Eskom’s mini-grid located at its Research, Testing and Development (RT&D) Centre in Rosherville, South Africa – allowing Eskom to test the VRFB, its performance and applications under numerous simulations.
The project is the culmination of the co-operation between Bushveld Energy and the Industrial Development Corporation (IDC) of South Africa who together undertook a study in the second half of 2016 to assess African VRFB demand and opportunities.
By August 2017, the study concluded that favourable demand for VRFBs, particularly in the utility (including transmission and distribution networks) and off-grid, as well as mini-grid markets, exist.
The 120 kW peak power and 450 kWh peak energy VRFB, which was manufactured by US-based technology company, UniEnergy Technologies, is in the process of undergoing an 18 month-long testing period to validate the operational performance of the system in local conditions and to demonstrate the applicability of the VRFB for broader commercial use in South Africa and the rest of Africa.
The testing will entail at least six simulations at the RT&D Centre including minimum load shifting, wind generation smoothing, solar generation smoothing, power quality improvement, multiple full daily charge cycles and potentially self-black-start capability.