The rapid expansion of electric power across the world is putting a strain on battery production. The standard lithium-ion battery depends on minerals and metals in limited supply, so alternatives are needed urgently. Mahdokht Shaibani at Monash University describes the work of her team on developing lithium-sulphur batteries. There are many advantages, not least the abundance of sulphur, the 16th most common element on Earth. Added to that, … [Read more...]
Nuclear in 2020: a global look ahead at policy, financing, politics, by country
Dan Yurman presents his worldwide review of nuclear’s prospects. 19 nations are covered. He explains while some countries are planning to scale down nuclear, like South Korea and France, some are increasing investment, like China. Others remain stuck over policy, pricing, financing and politics (e.g. Japan, the U.S.). Exporters of plants, led by Russia, are making moves – not always easily - in Eastern Europe and the Middle East. R&D … [Read more...]
High-efficiency “spacecraft” solar cells are coming down in price
Solar cells commonly used in spacecraft are highly efficient but too expensive to be used commercially down here on Earth. Two methods, HVPE (hydride vapour phase epitaxy) and the preferred MOVPE (metalorganic chemical vapour phase epitaxy), have been used to make these super-cells, reaching efficiencies of 29.1%. The National Renewable Energy Laboratory (NREL) says its scientists have discovered a method, D-HVPE, that should achieve those … [Read more...]
Peak Energy by 2030: Efficiency gains will make the Transition affordable
We can’t afford the energy transition? Next time you hear that from someone, perhaps you can show them this. Sverre Alvik at DNV GL explains that, according to their latest Energy Transition Outlook, although annual global energy expenditure will have to increase from $4.6tn in 2017 to $5.5tn in 2050, its share of growing world GDP will almost halve from 3.6% to 1.9%. That’s because continuing energy efficiency gains are making sure that total … [Read more...]
Next generation Wind rotors: because “supersizing” is reaching its limit
A great deal of the cost reductions in wind energy have come, pure and simply, from bigger turbines. Their rotors have a greater swept area and access higher wind speeds at elevated heights. But there are practical limits to the size these blades can reach. Challenges include weight, fatigue, manufacturing, reliability, transport and logistics. To push the boundaries of design, teams from the U.S. Department of Energy’s National Renewable Energy … [Read more...]
Predicting global air conditioning demand, by nation
Predicting future energy demand is difficult, more so when you must account for the choices made by individual households spread all across the globe. Air conditioning is a case in point. To tackle this, Lucas Davis led a team at the Haas School of Business to quantify each nation’s need for air conditioning, and rank them (219 countries and 1,692 cities). To get a nation’s “total CDD exposure” they, in essence, worked out their average cooling … [Read more...]
The search for “thin film” solar PV: stable, efficient, non-toxic, abundant
Around 95% of the world’s solar modules are made with silicon. It’s stable against temperature and humidity fluctuations and we’ll never run out of it. But it’s quite inefficient at absorbing sunlight, and very brittle. So the silicon layers in PV have to be quite thick to capture sunlight and resist cracking, leading to heavy and bulky solar panels. The remaining 5% of solar modules are “thin film”, opening the way for game-changing lightweight … [Read more...]
2019-2024: competitive auctions will launch over 2/3rds of utility-scale renewables, says IEA
Government support for new utility-scale capacity is being replaced with competitive auctions, the surest sign that the commercial appetite for renewables - particularly solar PV and onshore wind - is growing strong. This article by the IEA pulls out the essential numbers from their annual Renewables 2019 report (their 5-year market analysis and forecast for renewable energy and technologies in the electricity, heat and transport sectors). The … [Read more...]
Distributed Solar: rooftop residential, commercial systems keep getting cheaper
In the U.S., PV module efficiency (median values) rose from 12.7% in 2002 to 18.4% in 2018, much of it in the last decade and a full percentage-point increase in the last year alone. The best modules are even more efficient, says John Rogers at the Union of Concerned Scientists. Improvements have come from manufacturing processes and cell architectures, and the increasing share of more-efficient mono-crystalline technologies: up from 40% in 2016 … [Read more...]
Better grid integration beats coal plant ramping to reduce wind, solar curtailment
Wind and solar curtailment is worst where these renewables are poorly integrated into the grid. The further their energy can reach the more regions they can service, thus minimising curtailment. If they don’t reach far, local coal plants must ramp down - but only if they’ve been retrofitted to be able to do so. It’s a problem faced by many countries: spend money on the retrofits or the integration? Writing for the Regulatory Assistance Project … [Read more...]
California fires and blackouts: would non-profit utilities be more reliable, safer, cheaper?
The wildfires in California ignited by poorly maintained transmission lines have themselves ignited a debate about whether the guilty - and now bankrupt - energy utility PG&E (the largest in the state) should now become publicly owned. That in turn has led Severin Borenstein at the Energy Institute at Haas to consider the pros and cons of public v private in this vital activity. The first thing to note is that electricity transmission and … [Read more...]
Rolls Royce wants innovative financing for its first-of-a-kind nuclear SMRs
Rolls Royce has made nuclear reactors for decades, small enough to fit inside nuclear submarines. It’s now adapting that expertise for the grid. Dan Yurman runs through the details of the firm's plans, including a look at its first-of-a-kind 440MW technology. Regulatory timescales will be kept short by developing the small modular reactors (SMRs) at existing licensed nuclear sites – with Cumbria and Wales its main targets. Importantly, an … [Read more...]
Midwest U.S. grid operator MISO: modelling for a clean energy future
Planning can’t be easy for a grid operator. Take MISO which operates one of the world’s largest energy markets. They’re responsible for integration and bulk transmission across the central U.S., but decisions on the actual future energy mix and demand are being made elsewhere: by state governments, utilities and consumers big and small. Given the amounts invested in infrastructure and the lead times involved, no one will thank MISO if their … [Read more...]
Electricity pricing: shifting costs on to households that can afford it
Utilities need to invest in the future, and the Transition needs to be paid for by their customers. The less painful that is to each customer, the more publicly acceptable it will be. Maximilian Auffhammer at the Energy Institute at Haas explains how electricity pricing usually combines a fixed monthly charge with a block rate price (the charge for each additional unit of energy). Here he reviews a new report that scrutinises how different firms … [Read more...]
An independent Global Energy Forecast to 2050 (part 4 of 5): Nuclear, biomass and CCS
Schalk Cloete is creating his own 5-part independent Global Energy Forecast to 2050, to compare with the next IEA World Energy Outlook, due in November. To make his predictions he has created simulations of cost-optimal technology mixes and made his own assumptions over the drivers that will affect them: policy, technological progress, demand growth and behavioural change are all included. If nuclear, biomass and CCS take off they will … [Read more...]
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