The flexibility of small scale solar can help roll out vaccines to remote and poorer parts of the world that the grid doesn’t reach. Access to power for refrigeration is vital when you consider that most vaccines must be stored between 2°C and 8°C, like for measles and polio. It’s the same for the Covid-19 vaccines from Johnson & Johnson and AstraZeneca-Oxford. But the Moderna vaccine must be stored at between -25°C and -15°C. The … [Read more...]
Outlook USA: even with battery costs, Wind and Solar can undercut Coal and Gas by 2023-24
IEEFA has published its U.S. Power Sector Outlook 2021. Its authors, Dennis Wamsted, Seth Feaster and David Schlissel summarise and explain the projections. They say that coal and gas are set to become the biggest losers as renewable generation climbs quickly. The future for wind and solar – coupled with storage to address intermittency - is looking very good. They present estimates from NextEra (the largest renewable energy developer in the … [Read more...]
China: decoupling GDP growth from rising emissions
To set up this week’s important online event (Tuesday 13th & Wednesday 14th April) “China: Carbon Neutral by 2060 -EFFICIENCY FIRST” we have an overview of China’s energy transition. Everyone agrees its performance is critical for the world to achieve the global goal of limiting warming to 1.5C by 2050. China made significant progress in 2020 with policy frameworks, renewable capacity additions and EVs, but it also added 38 GW of new … [Read more...]
Plastic Solar Cells: OPV power conversion efficiency now reaches 18%
Don’t just think plastics are insulators. Two Nobel prizes were won by showing they can be semiconductors. That celebrated research opened the door to polymer-based solar cells. They are made in a lab from common elements, using processes established decades ago for ordinary household items like plastic wrap. A design strategy breakthrough led by NREL has now created an organic photovoltaic (OPV) solar cell with a record-breaking 18.07% power … [Read more...]
Public opposition and grid integration costs: the two limiting factors for Wind?
Are we heading for an over-reliance on wind? With wind generation costs continuing to drop dramatically, Schalk Cloete takes a data-driven look at the obstacles wind will face as its contribution to the global energy mix (a little over 2% today) keeps rising. In the main, it is grid integration and public opposition to very visible turbines – and they are related. Putting turbines out of sight and offshore will increase transmission costs. And … [Read more...]
How to keep winter ice off a Wind Turbine’s blades
Nearly 800GW of wind power have been installed worldwide so far, with plenty more to come. But the Texas freeze in February showed how vulnerable wind turbines are to ice. Hui Hu at Iowa State University summaries his team’s research into solving a problem that can cut generation by 20% or even shut down turbines completely. He explains why existing de-icing solutions for airplane wings offer only a partial solution. Metal airplane wings can be … [Read more...]
Do government renewable energy auctions squeeze the PPA market?
Spanish government renewable energy auctions in January produced record-breaking low strike prices for both wind and solar. For solar the average price was €24.47/MWh (the lowest was €14.98/MWh), guaranteed for 12 years through contracts-for-difference (CfDs). As such auctions continue around Europe, Michael ClauĂźner at Energy Brainpool asks what impact these prices will have on future power prices in general and on solar power purchase agreement … [Read more...]
Denmark approves artificial island to site 10GW Offshore Wind hub
Denmark has approved a plan to build an artificial island in the North Sea that will be a hub to hundreds of offshore wind turbines, 260m tall, that will generate 10GW, enough energy for 10 million households. The first stage will be the size of 18 soccer pitches, for 3GW, costing €29bn ($34bn), and should be operational by around 2033. Writing for the World Economic Forum, Douglas Broom says that the ultimate goal of 10GW should be more than … [Read more...]
Berkeley Lab releases progress report on state renewable energy standards
Berkeley Lab has released an annual status report on U.S. renewables portfolio standards (RPS), providing an overview of key trends associated with state RPS policies. The report, U.S. Renewables Portfolio Standards 2021 Status Update: Early Release, published in slide-deck form along with accompanying data files, describes recent legislative revisions, key policy design features, compliance with interim targets, past and projected impacts on … [Read more...]
Wave Energy: how variable geometry designs can raise conversion efficiency
Wave energy is another renewable technology waiting to break through. One main challenge is that about 35%–50% of WEC (wave energy converter) costs come from the device structure alone. Researchers at NREL are experimenting with variable geometry, changing the shape of the WEC so that in more energetic seas the structural loads are controlled. In turbulent seas the excess load can easily be shed, while when the seas are quiet the maximum energy … [Read more...]
Germany’s Renewable Energy Act 2021: how to implement the fine policy detail of emissions reduction targets
After much haggling and debate, Germany’s Renewable Energy Act (EEG) 2021 was finally approved in December and came into force on 1 January 2021. Sila Akat and Simon Göss at Energy Brainpool outline the most important changes imposed by the amendment. It gives an insight into how a nation is dealing with the finer details of increasingly ambitious emissions reduction targets. The authors cover the main issues and outcomes. How Germany is dealing … [Read more...]
Optimising Wind and Solar needs new ways of weather forecasting
Weather forecasters are used to – and very good at – predicting large-scale weather patterns and then inferring what the actual surface weather conditions will be, based on a database of past events. Hannah Bloomfield at the University of Reading explains how the creation of a database of site-specific wind and solar generation, as well as grid demand, can be used in the same way to more accurately predict the impact of the weather on these … [Read more...]
Carbon Offsetting via old wind and solar farms is no way to reduce emissions
Companies can offset their emissions by buying carbon credits, where the money goes to fund clean energy projects. But the carbon credit market includes credits for very old projects. This is a foolish waste, explain Mark Maslin and Simon Lewis at UCL (UK). The market must be based on the principle of additionality: the money should be aimed at projects that would not have happened otherwise, thereby causing emissions reductions that would not … [Read more...]
Quantum Well solar cell sets new record for converting light to energy
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...]
Nuclear-Wind hybrid plants for grid stability, Power-to-X and more
How would you use a nuclear-wind hybrid plant and maximise its potential? When intermittent wind’s output falls, nuclear can step in to feed the grid. When it’s not doing that it can use its power to run the production of a wide range of commodities: from biofuels, hydrogen, pumped hydro to wastewater purification, desalination, chemical manufacturing and more – including straightforward thermal power for industry. In collaboration with NREL, the … [Read more...]
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