The planned rapid transition to electric vehicles has major challenges. Schalk Cloete complies them into a list of ten, including: preserving our car-centric cities preserves its inefficiencies and societal costs; it works against much of the personal âbehaviour changeâ we need; though BEVs (battery electric vehicles) are better in cities, when infrastructure costs are included they are less efficient than hybrids and modern ICEs for many driving … [Read more...]
Industryâs large on-site batteries can profitably help stabilise the grid
Energy-intensive industries that invest in their own large on-site batteries will provide multiple benefits to themselves as well as to grid stability, says a new study by the Joint Institute for Strategic Energy (JISEA) in partnership with NREL and others. It matters because future power systems will need to be highly flexible due to the variability of wind and solar. The study assessed two established energy-intensive industries (chlor-alkali … [Read more...]
Avoiding renewables bottlenecks needs long term planning of electricity transmission infrastructure
As more renewables are rapidly added to grids, network operators must plan new transmission lines to integrate them immediately, avoiding wasteful bottlenecks. Itâs a puzzle thatâs getting bigger and more complex as the energy transition gains pace, which means transmission policy and planning must improve, and fast. Rather than making lots of small incremental steps, planning ahead will prove less costly and capture efficiencies and economies of … [Read more...]
Climate change, âwind droughtsâ and the implications for Wind energy
What effect will changing trends in regional wind speeds have on the future of wind energy? Very large, considering that a small change in wind speed has a big effect on the power output of a turbine (itâs related to the cube of the wind speed). Hannah Bloomfield at the University of Bristol first looks at the âwind droughtâ experienced in Europe this year which saw SSE in the UK report a 32% drop in power from its renewable assets. Meanwhile, … [Read more...]
Will Wind & Solar confront its 10 challenges? If not, we need Nuclear, CCS, and more
Wind and solarâs impressive cost declines have seen its welcome and rapid emergence. But currently they account for a mere 2â4% of global energy. So these variable renewable energy sources (VREs) must now address 10 big challenges if they are to dominate the energy sector, explains Schalk Cloete in this data-led review. Their cost declines will be confronted and even cancelled by new costs theyâve not yet faced during their low-hanging-fruit … [Read more...]
Germany: can 100% renewable power reduce energy costs within the decade?
A bold report is presented by Thure Traber, Hans-Josef Fell and Sophie Marquitan at Energy Watch Group. It says that a 100% renewable power system for Germany can undercut fossil power within this decade. The authors look at the full cost of fossil power, including subsidies. Importantly, they explain how unit costs will rise further, as demand declines, due to the decreasing utilisation of its expensive infrastructure. Meanwhile, total system … [Read more...]
Modelling Hydrogenâs role in high penetration Wind + Solar grids
A hydrogen ramp-up is going to be expensive and asset-heavy. So, a whole-system analysis is needed to ensure its deployment is done cost-effectively today and meets long term goals. This is what all nations committing to hydrogen are struggling with. Kelley Travers at MIT describes their modelling, in collaboration with Shell, that looks at the optimisation of hydrogen deployment in grids where variable renewables (VREs) like wind and solar are … [Read more...]
Surging U.S. renewables on track to take 30% market share by 2026
While the U.S. Congress debates whether backing the transition is a winning strategy, the energy sector is clearly showing the nationâs direction of travel. Dennis Wamsted and Seth Feaster at IEEFA look at the impressive growth of the clean energy champions, wind and solar. Since 2019, wind and utility-scale solar generation has risen by 76 TWh â a 31% increase â while coal and gas has fallen by 1.6%. By 2026, wind and utility-scale solar will … [Read more...]
IEA WEO 2021 message to COP26: 40% of clean energy goals will cut costs
The IEAâs latest World Energy Outlook was published on Wednesday. This yearâs WEO-2021 is released earlier than usual to inform COP26 and, for the first time, is available for free to ensure the widest possible audience. Simon Evans at Carbon Brief offers his summary of the 386-page report, quoting relevant numbers and charts. He first points to the new scenario, Net-Zero Emissions by 2050 (NZE), as the IEAâs recognition that this is what … [Read more...]
Next German governmentâs climate and energy plans: what will Olaf Scholz do?
Olaf Scholz led Germany's Social Democrats (SPD) to an unexpected win in the 2021 elections held in September. He now needs to finalise a coalition with the Green Party and the pro-business FDP before forming a government and becoming chancellor. Like his predecessor Angela Merkel, Scholz has said he wants to become a "climate chancellor". Kerstine Appunn and Benjamin Wehrmann at Clean Energy Wire try to understand what his climate and energy … [Read more...]
Ice for storage for intermittent renewables, then for cooling
Cooling accounts for around a fifth of total energy consumption in buildings. All those air conditioners and electric fans make up a tenth of all global electricity consumption. Demand will keep rising as developing nations get wealthier. Andrea Willige, writing for the World Economic Forum, looks at ice as a seemingly simple solution. Ice can be used as an energy store like a battery, to balance the grid. Create it when energy is cheap (at … [Read more...]
The U.S. now needs a Carbon Tax to transition from Gas to Renewables
Gas emissions must be halved (and coal eliminated) by 2030 to meet President Bidenâs goal of a carbon free power sector by 2035. The problem is that gas additions are half the price of new wind and solar installations. Though the clean energy champions are still getting cheaper, so are gas additions. Nikos Tsafos at the Center for Strategic and International Studies looks at the policy options over the next decade for the U.S. The stark fact is … [Read more...]
Germany 2021: coal generation is rising, but the switch to gas should continue
As news across Europe shows, a combination of factors is seeing coal powered electricity generation on the increase. Simon Göss at cr.hub, writing for Energy Brainpool, takes a close look at whatâs going on in Germany. The post-pandemic demand bounce-back, low generation from wind due to calm weather, and record high gas prices have made coal more competitive. Thatâs even with rising prices for CO2 and record high prices for coal (caused by … [Read more...]
Record global power sector emissions by 2022, because Renewables arenât growing fast enough
The IEA is forecasting that renewables will cover only half the projected increase in global electricity demand in 2021 and 2022. Despite renewablesâ impressive growth, coal and gas will be needed to cover the rest. That means emissions will rise to record levels. That will be the reverse of the IEAâs (and many othersâ) âRoadmap to Net Zero by 2050â pathway, where three-quarters of global emissions reductions between 2020 and 2025 come from the … [Read more...]
Hydrogen production in 2050: how much water will 74EJ need?
Thereâs no point ramping up hydrogen if other resource constraints are going to bring it to a halt. Here, Herib Blanco at IRENA summarises their research into how much water will be needed in the production of hydrogen through electrolysis (i.e. from water) and the costs involved. A wide range of analyses have been reviewed to calculate the amount of water used during the hydrogen production, and by the energy source used to power it (renewables … [Read more...]
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