We’re facing an unexpected global economic slump thanks to the coronavirus sweeping across the world. In response, governments everywhere are tabling stimulus packages to get us through what is a temporary but severe drop in economic activity. That stimulus could be used, as it usually is, to get us back on the same path. But it should be used to steer us further and faster onto the new path of clean energy, says Fatih Birol, Executive Director … [Read more...]
From Buildings to Solar Thermal: using electric charge to vary insulating properties tenfold
The insulating properties of a material don’t normally vary. Applying an electric charge to a material can vary its electronic and magnetic qualities, but not its thermal conductivity, normally. David Chandler at MIT says now a team of researchers there have found a way to do it. Their “electrical heat valve” can increase the thermal conductivity of thin-film strontium cobalt oxide (SCO) on demand by running a charge through it after adding … [Read more...]
BP’s zero-carbon pledge: three major challenges
This month BP, one of the world’s largest oil and gas firms, announced its ambition to be a net zero emissions company by 2050. The promise extends to cutting the emissions of its customers too; after all, they’re the ones who are actually burning the fuel, not BP. So it aims to reduce the carbon intensity of its products by 50% by 2050 or sooner. Jules Kortenhorst, Tyeler Matsuo and Raghav Muralidharan at Rocky Mountain Institute take a look at … [Read more...]
Even cycling Coal is losing money. Only “summer” coal makes sense in Texas, Louisiana
Joseph Daniel at the Union of Concerned Scientists says a detailed look at the U.S. data shows the days of coal plants being the baseload kings are numbered. The declining costs of wind, solar and gas are making coal look expensive. What’s more, increasing energy efficiency is flattening peak demand (and therefore prices), squeezing those periods when coal could rely on finding customers. That means coal plant owners that say they deserve support … [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...]
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...]
Decarbonising light duty vehicles globally: consumer choice, technology, policy pathways
The MIT Energy Initiative (MITIE) has completed a 3-year study of “Mobility of the Future” to plot a decarbonised pathway for light duty vehicles (i.e. cars) globally. Wide in scope and detail, it covers government policies, consumer choices and technologies, combining their multiple and complex impacts to make their assessments. Kathryn Luu at MITIE reviews the final 220-page report. For consumers, cost, convenience, and — increasingly — carbon … [Read more...]
Grid-Interactive Buildings solutions: U.S. govt is looking for you
According to U.S. figures, up to 80% of peak electricity demand comes from buildings. So designing them to be energy efficient, with their own generation (e.g. rooftop solar), storage, and load-flexibility – and making it a cost effective industry standard – would be a game changer. It’ll make the grid more resilient, and take pressure off utilities investing in expanding the underlying infrastructure. Sneha Ayyagari and Matt Jungclaus at Rocky … [Read more...]
Decarbonising industry: how much policy-driven adoption is needed to let the market take over
Decarbonising industry is one of the world’s greatest challenges. The costs, today, are huge and therefore the technology adoption required has hardly started. But several technologies already exist. Gbemi Oluleye at Imperial College (UK) explains the first step is to measure the market size for each sub-sector, then estimate how much policy-driven adoption is required to achieve the cost reductions that make the change viable. After that, no … [Read more...]
DNV-GL: energy’s shrinking share of growing global GDP shows how we can afford Transition
At the current rate of progress higher energy efficiency, more renewables, and carbon capture will not be enough to keep the global temperature rise to well below 2°C. So to point the way, DNV-GL has condensed its Energy Transition Outlook 2019 into 10 ways technology can meet the COP21 targets. This article gives figures on how much solar and wind we really need, battery production, annual investment in grids, and energy efficiency. It further … [Read more...]
India: coal plummets, renewables stepping in
In 2018, 80% of India’s total energy lending went to renewables. Coal got the rest, a major fall compared to 2017. No wonder, given coal plants have been running at below 60% utilisation for two years with the operators suffering huge losses. Renewables are now undercutting coal and getting cheaper. And shortages in water – needed for plant cooling – just add to their woes. Vibhuti Garg at IEEFA catalogues the problems, then describes the … [Read more...]
Non-Wires Alternatives for grid expansion: what the U.S. can teach Europe
Grid expansion usually means more power stations and wires. Far from simple, and very expensive. Non-Wires Alternatives (NWA) solve the problem differently by reducing net demand. Modern methods of energy efficiency, demand response, storage, and distributed generation are coordinated and used instead, under the banner of Distributed Energy Resources (DER). Crucially, it can cast utility firms in the role of market makers, not just generators and … [Read more...]
Energy security v Transition in Algeria, Egypt, Morocco, Turkey
Like most developing countries, the challenge of growing economies, increasing population and rapid urbanisation puts energy security above emissions reductions. So it is for Algeria, Egypt, Morocco and Turkey, says Duygu Sever in her report for IFRI Centre for Energy & Climate. In this article she explains that all four countries nevertheless have high renewables deployment potential, and have already embraced wind and solar. To accelerate … [Read more...]
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