There’s a new world-record for two-junction solar cells, converting 32.9% of sunlight into electricity. Although it’s only a small improvement on the previous record of 32.8% it uses a design that should lead to even greater performance. NREL, in collaboration with the University of New South Wales (Australia), has built a cell consisting of a series of more than 150 ultrathin layers of alternating semiconductors that create quantum wells which … [Read more...]
Nine advantages small-scale solutions have for reducing global emissions
Which is best? Spending your budget on a million 1 KW solar panels or a single 1 GW nuclear/hydro/gas plant? Lots of electric bikes or a single tram system? Lots of smart thermostats or whole-building retrofits? Charlie Wilson (University of East Anglia), Caroline Zimm (IIASA) and Simon De Stercke (Imperial College London) summarise their study that lists the advantages of small-scale “granular” solutions over large-scale “lumpy” ones. Granular … [Read more...]
How can Europe help build China’s Hydrogen economy?
On 18th November Energy Post, in partnership with the EU-China Energy Cooperation Platform, hosted a series of online workshops under the theme “China: Carbon Neutral by 2060”. The purpose was to understand the Chinese landscape and uncover opportunities for Europe. Here, the moderator for our “Hydrogen” panel, Gökçe Mete, summarises the workshop which included an expert panel discussion and questions from the audience. Taking part were Tudor … [Read more...]
Biden’s Green New Deal: bipartisan support should clear a path for Nuclear
President-elect Joe Biden knows that a divided Congress and Senate will make passing most legislation very difficult, not least his sweeping decarbonisation agenda. However, there is one area where both Republicans and Democrats share the same goals, and that is nuclear power. Jennifer Gordon at the Atlantic Council explains why this can clear a path for nuclear while other elements of Biden’s clean energy programme may struggle and even fail. … [Read more...]
Solar power stations in space that beam uninterruptible power back to Earth
It’s still on the drawing board, but putting solar farms into orbit has obvious advantages. The power is 24/7, and no sunlight is lost through the atmosphere. But there are two big challenges. Amanda Jane Hughes and Stefania Soldini at the University of Liverpool explain how the European Space Agency, the California Institute of Technology, the Japan Aerospace Exploration Agency, and Xidian University in China, among others, are attempting to … [Read more...]
Waste-to-Energy is underperforming. Whole-energy-system simulator can uncover the bottlenecks
The potential for Waste-to-Energy (WTE) in the U.S. is 674 TWh/year, roughly 8% of the energy used by the transportation sector. However, for reasons not easily understood, many WTE technologies struggle to make it to commercial scale. Researchers at NREL have built a first-of-a-kind simulation model, WESyS, to create scenarios and understand where the bottlenecks are. The whole-energy system is always complex. The WESyS simulation modules … [Read more...]
Battery innovation must drive the 50-fold increase in storage capacity needed by 2040
The IEA has set the storage sector a challenge. It says the world will need 10,000 GW-hours of batteries and other forms of energy storage by 2040, a 50-fold increase on today. The good news is that a joint study by the European Patent Office and the IEA reveals electricity storage patenting activity has grown 14% a year over the past decade. Here the IEA summarises the findings of its comprehensive report. It explains that Japan and Korea lead, … [Read more...]
Analysis shows Wind and Solar costs will continue to fall dramatically throughout the 2020s
Michael Taylor at IRENA has summarised its latest studies that show how the cost of renewables are set to continue declining dramatically through to 2030. We all know how those costs declined in the last ten years. Going forward, the weighted average cost of electricity in the G20 countries from offshore wind could fall by almost 50% by 2030 from 2019 levels, onshore wind by around 45%, utility-scale solar PV by up to 55% and concentrated solar … [Read more...]
How will China build its Hydrogen economy?
What are China’s hydrogen prospects? That’s the question Kevin Tu at the IFRI Center for Energy & Climate attempts to answer in a report that he summarises here. He points at the growing number of policies that show China is taking hydrogen very seriously. China wants to expand production as well as build up end uses in transport, steel and cement manufacturing, and storage. The main drivers are the Covid pandemic, energy security, the … [Read more...]
Nuclear Fusion: will super-cable technology bring “inexhaustible” energy supply a step closer?
Nuclear fusion is the process the Sun uses to produce energy. But attempts to replicate that process here on Earth have all needed more energy to run them than they generate (our existing nuclear plants use fission). Now a team led by MIT’s Plasma Science and Fusion Center and MIT spinout company Commonwealth Fusion Systems has developed and tested high-temperature superconductor (HTS) cable technology that can ensure the high-performance magnets … [Read more...]
Are 1.5°C scenarios supplanting “Business As Usual” as the new benchmark?
The world energy outlooks published annually by the IEA, BP and DNV GL look very different this year. 1.5°C scenarios are being taken much more seriously. Could it be because of the trauma of Covid-19, or the extraordinary – though still insufficient – success of renewables coupled with the rising ambition of climate-aware governments and their policies? Either way, they are helping to shift the debate away from the mainstream “business as usual” … [Read more...]
Improving cost and performance modelling for energy technologies, old and new
Measuring the performance of an energy technology is key to informing policies and pathways as the transition scales up. But are we measuring all the right things and getting accurate answers? If we’re not, those policies and pathways could end up wrong. Paul Sapin at Imperial College, UK, explains how they are creating a library of data-rich models to greatly improve predictive power for all energy technologies, both existing and emerging. He … [Read more...]
Decarbonising end-use sectors: buildings, transport, industry. Which strategies are best?
The rapid pace of change in the energy sector is a positive sign for the transition. But the disruption it causes creates another big problem. It makes it harder to predict what will happen next. That makes strategies and pathways harder to design, and increases the risk of stranded assets. To try to come to grips with that future, Sean Ratka, Paul Durrant and Francisco Boshell summarise the findings of IRENA's 4-day “Innovation Week” held last … [Read more...]
Research into solid electrolytes to improve performance of lithium-ion batteries
If the limits of lithium-ion battery performance are indeed being reached, one way forward is to extend those limits with new materials. Mark Shwartz at Stanford University describes their research into solid electrolytes, which promise to be more energy dense than the standard liquid form. To identify the best compounds, artificial intelligence and machine learning were used rather than the usual and much lengthier trial-and-error experimental … [Read more...]
China’s new net zero emissions target for 2060: why now, and how?
China’s promise of peak emissions before 2030 and net zero by 2060 is a major and welcome step for the economic (and fossil fuel) powerhouse. Better still, the rest of the world doesn’t need to make concessions to get China to stick to the new target, says John Seaman at the IFRI Centre for Energy & Climate. That’s because an energy transition is in China’s interests. It wants and needs to be at the forefront of new energy technologies to … [Read more...]
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