United Kingdom

A global ranking of large scale solar project capacities indicates prominent roles for a resurgent Spain, behind the usual top three of China, the U.S. and India, with Australia and the Netherlands also on the rise. There were disappointing returns, though, for the U.K., Italy and Canada.

Scottish start-up Gravitricity has begun construction of a 250 kW gravity-based energy storage project at Port of Leith. A 15m-high rig uses renewable energy to raise a mass in a 150-1,500m shaft and discharges the electricity thus ‘stored’ by releasing the mass to rotate an electric generator.

Each 1.8 GW of new gas generation capacity could be replaced by 1.7 GW of solar as part of a cleaner, 6.3 GW collection of renewables and energy storage facilities–and that alternative already comes in cheaper than the business-as-usual approach, according to the Carbon Tracker thinktank.

A British-Egyptian research group has tested the use of hydrogels beads for PV module cooling. The micro-sized particles were saturated with aluminium oxide (Al2O3) water-based nanofluids and placed below the simulated PV panels. The experiment showed, according to the scientists, that the hydrogels beads were able to significantly reduce the temperature by between 17.9 and 16.3 degrees Celsius.

Scientists in the UK developed a model to explain one of the challenges to harnessing an oxygen-redox reaction in certain cathode materials for lithium-ion batteries. Based on their improved understanding of the reaction, they suggest several possible routes for further research to avoid the unwanted reactions and develop reversible, high energy density cathode materials.

Through the operation, Shell wants to consolidate its position in the virtual power plant market.

U.K. scientists have used mesoporous scaffolds based on hydroxyapatite nanoparticles – blended with titanium oxide nanoparticles – to create a mechanism that prevents lead leakage in perovskite solar cells. They claim the method captures lead ions in leaks, while also increasing cell efficiency.

The new devices feature efficiencies ranging from 20.7-21%. The panels are said to be compatible with a wide range of slates and tiles, include special fixings for different batten thicknesses, and achieve the highest fire rating and wind resistance without modifications to the roof.

Coventry City Council, in the English West Midlands, wants to attract a £2 billion gigafab and is already in talks with nearby motor manufacturers, and with global battery suppliers, according to regional politician Andy Street.

A British-Chinese research group has created a new framework to assess the performance and efficiency limits of photovoltaic-thermal solar panels. They say that the improvement of spectral-splitting (SS) filters in the devices will be the key to their future commercial success.