There is a maximum speed at which solar capacity can expand. You know you’ve passed it when insufficient storage means solar curtailment, or selling the daytime excess means curtailment of other clean energy generators. As solar grows, so too will this problem. Vincent Xia, at the Precourt Institute for Energy, Stanford University, reports on a new Stanford study which says emissions predictions are not taking this into account, thus … [Read more...]
Is Blockchain a disruptor? Or the solution to an already-disrupted energy sector
The global energy sector is already facing multiple, concurrent disruptions that are fundamentally transforming electricity markets around the world: digitalisation, decarbonisation, decentralisation, and electric mobility. It’s creating residential prosumers, with their solar panels, electric vehicles, smart thermostats (the list is growing) and a predicted global installed distributed energy resources (DERs) capacity of 530 GW by 2026, … [Read more...]
50% Hydrogen for Europe: a manifesto
Electricity has well known limitations, mainly for bulk and long-range transport, industrial processes requiring high temperature heat, and the chemicals industry. To entirely replace fossil fuels we need hydrogen, say Frank Wouters and Prof. Dr. Ad van Wijk. It has an energy density comparable to hydrocarbons. There's more: Europe’s electric grid can’t cope with 100% electrification, yet hydrogen would use the existing gas pipe networks. The … [Read more...]
Electric Cars: only big subsidies lift market share off the 1.5% floor
You only need to compare the US to Norway to see how the main driver for EV sales is coming from government subsidies. Total Norwegian EV incentives cut the cost of running a typical 60 kWh battery pack from over $200/kWh to negative $336/kWh. US incentives bring it down to negative $23/kWh. The consequences are clear: generous Norway sees EVs take 31% of the market share in cars. In the US it’s 1.4%. That makes EVs a luxury item in the US (like … [Read more...]
36bn GWh: the “limitless” Geothermal from old UK coal mines
The Earth gets hotter by 2.5C to 3.5C with each 100m depth. It’s what makes geothermal energy possible, anywhere. In the UK geothermal could meet the nation’s heat demands for at least 100 years, say Jon Gluyas, Andrew Crossland and Charlotte Adams of the Durham Energy Institute. Properly managed it could last indefinitely. Given that heat does not travel well, geothermal must be developed locally. Fortunately, accessible heat lies beneath or … [Read more...]
2009 to 2017: solar, wind costs plummet, hydro steady, nuclear up
Between 2009 and 2017 prices dropped 76% for solar panels and 34% for wind turbines. Hydro and nuclear struggle to cut costs; as mature technologies, most of the efficiencies have already been squeezed out already. Also, they are difficult to productise and scale; dams (definitely) and nuclear plants (somewhat) are one-offs. In contrast, solar panels and wind turbines are far easier to productise and then mass produce. It’s why wind overtook … [Read more...]
Community Scale Solar plugs the gap between “rooftop” and utilities
Rooftop residential and utility solar exist at two ends of the scale. Is there a sweet spot between those two that can capture the advantages of small-scale (no transmission loss, grid resilience through distribution) and large (economies of scale, easy to invest in)? Yes, reports Laurie Stone of the Rocky Mountain Institute, and it’s being called Community-Scale Solar. More than a sweet spot, it can reach communities underserved by rooftop solar … [Read more...]
UK: Despite progress, 100% low-carbon is still a long way off
The UK transition is often cited as a success story. Coal’s contribution has dropped from 40% to 6%. Wind, solar and hydroelectric now generates more electricity than nuclear. Demand for electricity has also fallen. The carbon intensity of Britain’s electricity has almost halved, from over 500g of COâ‚‚ per kilowatt-hour in 2006 to under 270g in 2018. The National Grid now expects to be able to operate a zero-carbon electricity system by 2025. But … [Read more...]
“Stop trading renewable energy supply certificates, speed up the transition”
In the UK, REGOs certify that the power a consumer buys is renewable. As REGOs can be traded that means one supplier, sourcing 100% of their energy from renewables, and another simply buying enough REGOs to cover 100% of their output can both say they are 100% renewable. Is there a difference? Yes, says Thomas Harrison at supplier Good Energy. Trading REGOs takes the pressure off suppliers to use all their buying power to expand the supply of … [Read more...]
The rapid growth of solar integration into grids: learn from Germany
With the rapid electrification of Europe’s energy system, the network operators are facing a challenge. The integration of more and varied electricity generation is putting a strain on the growth of grids. Erik Rakhou and Chris Collins contrast the struggles the Netherlands is experiencing with the smoother ride navigated by Germany where in the 12 years to 2015 solar PV capacity rose around 100-fold from 0.44 GW to 39.7 GW. Greater investment, … [Read more...]
Why does coal survive? A detailed real-world cashflow analysis
Everyone knows coal plants are bad for the environment. So why do countries still use them? Coal’s attractiveness comes from the relatively low up front capital investment required to start generating energy. On top of that, the rapid rise of variable renewables (solar, wind) need something to rise with it to fill the generation gap when the sun doesn’t shine and the wind doesn’t blow. In his final instalment - after his similarly detailed … [Read more...]
What’s next for the geopolitics of energy transformation?
January’s IRENA report “A New World” has kick-started the debate on how the accelerating deployment of renewables will affect and alter the global distribution of political and economic power. Jan Frederik Braun and Daniel Scholten review its findings and build on the list of issues that must be faced. For example, although the IRENA report focuses on electrification the authors say power-to-gas is likely to play a major role, and we must face up … [Read more...]
China plans UHV transmission lines that span continents
China’s Global Energy Interconnection (GEI) project aims to create a worldwide network of UHV transmission lines that can deliver electricity between continents. If successful, generating electricity in the most remote areas – think deserts and the Arctic – becomes viable, as does China’s ability to sell electricity directly to Europe. First, two main technological challenges have to be overcome: energy loss along transmission lines spanning … [Read more...]
Fieldfisher Interconnectors Forum – Brussels, 21 March 2019
The Fieldfisher Interconnector Forum will take a highly topical look at Interconnectors across Europe and the UK. This free half day event will cover significant legal developments and hot topics, including: The Outlook for Interconnectors - Future Opportunities Brexit and Future Energy Trading Scenarios Energy Market and Regulation Updates Environmental and Planning Perspectives Attendees will hear from Will Bridges, … [Read more...]
Utilities are starting to invest in big batteries instead of building new power plants
There has been a dramatic drop in battery costs in recent years. Jeremiah Johnson and Joseph F. DeCarolis, of North Carolina State University, say if this continues grid-scale batteries could supplant the usual solutions to peak electricity demand: gas power plants and transmission lines. Inevitably, this will depend on the future price of gas, and the changing policy environment. But one thing is for sure: utilities don’t want to invest in peak … [Read more...]