Around a third of the worldâs energy consumption and CO2 emissions come from buildings. Highly glazed skyscrapers and buildings may look beautiful and let in plenty of light, but waste a lot of energy due to the extra cooling needed in summer and heating in winter. Modern skyscrapers can have window-to-wall ratios of 70%+. But modern thermally efficient photovoltaic windows not only provide insulation but turn the absorbed light into power. Wayne … [Read more...]
Tools to design energy systems resilient to natural disasters: from small villages to big cities
There is little doubt that emissions reduction will not be enough to cope with climate change. Adaptation will be essential too. Connor OâNeil and Moriah Petty at NREL describe how the National Renewable Energy Laboratory is developing free-to-use tools to help configure and create energy systems that are resilient to natural disasters. The tools have already been applied to small and large populations, ranging from a 500-person town to big … [Read more...]
Investing in Hydrogen: is there a âfirst mover advantageâ?
Is there a âfirst mover advantageâ â or not - for an investor in the new hydrogen economy? Michiel Korthals Altes offers a series of âtestsâ of investment decisions based on the following criteria: economics, climate efficiency, system optimum, price stability, regulation, technology, now and in the future. He concludes that until the sector reaches maturity, conversion inefficiencies make the production of hydrogen a poor choice for most … [Read more...]
Pollution costs are driving U.S. states to look for alternatives to Gas-Fired Plants
In the U.S. a growing number of states and regulators are directing utilities to look for alternatives to proposed gas-fired power plants, citing environmental justice and community health impacts, explain Caitlin Odom and Lauren Shwisberg at RMI. So itâs not just about emissions: pollution matters too. The authors quote studies that show clean energy portfolios (CEPs) not only reduce energy costs, but can save billions of dollars in community … [Read more...]
Energy Security: what if the UK government had not âcut the green crapâ from 2013
The UK provides an example of a government that cut back its green ambitions only to see its energy security suffer. In 2013, then-prime minister David Cameron told his ministers to âcut the green crapâ. That led successive governments to downgrade home energy efficiency, requirements for new homes to be âzero carbonâ, end subsidies for onshore wind and solar, and effectively ban onshore wind in England. What if the UK had stayed on its … [Read more...]
U.S. Residential Distributed Solar: still getting cheaper, installation and permitting too, more batteries
John Rogers at UCS reviews the new and comprehensive âTracking the Sunâ report from Lawrence Berkeley National Laboratory which covers both residential and non-residential âgrid-connected, distributedâ solar PV systems in the U.S. There has been clear progress across the board, including PV module efficiency, system costs, installation and permitting, and the uptake of batteries. For example, median efficiency for modules in residential systems … [Read more...]
New research into making water boil using less energy
Can the boiling of water be done more efficiently? If so, a wide range of processes can save energy, not least the standard use of steam turbines in electricity generators. David Chandler at MIT describes research there that modifies the surface of the heating element. A combination of microscale dents and nanoscale bumps and ridges on the surface, and pillars that allow the âwickingâ of water by capillary action, improves the efficiency of … [Read more...]
A role for Coal? Low-cost, negative emissions Blue Hydrogen from âMAWGSâ Coal/Biomass co-gasification
Schalk Cloete summarises his co-authored study that explains how to make hydrogen at unbeatably low prices from coal/biomass co-gasification. Though the âblueâ hydrogen process creates CO2, the self-contained plant using a membrane-assisted water-gas shift (MAWGS) reactor means 100% is captured easily. Better still, the use of biomass means the plant achieves negative emissions. The overall efficiency of the process is a very impressive 69%. The … [Read more...]
Record global clean energy spending, but itâs still not enough and costs are rising
Since 2020, clean energy investment has grown by 12% per year â it was only 2%/year during the five years after the 2015 Paris Agreement. That boost is the main reason why total global energy investment is set to reach $2.4tn in 2022, according to the latest âWorld Energy Investmentâ report from the IEA. Itâs very good news that spending on solar PV, batteries and EVs is now growing at rates consistent with reaching global net zero emissions by … [Read more...]
Implementing Polandâs national Recovery and Resilience Plan
How should Poland implement its national Recovery and Resilience Plan (RRP)? Sonia Buchholtz at Forum Energii outlines some important answers. First, a deep analysis of the challenges and assessment of the solutions and reforms must start now. Buchholtz says though the directions set out in the RRP are correct, the details are out-of-date. Policy reforms and more ambitious targets are needed in all the main areas: energy efficiency and heating; … [Read more...]
4 ways to cut whole system electricity costs with flexible Demand Side Management
Right now, energy system costs are driven by generation capacity, infrastructure upgrades, network reinforcements, curtailment and constraint payments, and imbalance costs. Whatâs missing is the investment in a raft of demand side management assets that are ready to go but are not part of the market, therefore not rewarded, and therefore not being invested in. Laura Sandys at Energy Systems Catapult, writing for WEF, explains why flexibility must … [Read more...]
The light bulb transition: when standards and subsidies promote sub-optimal technologies
This article is for those who want to understand the importance of timing: when is the right time to impose new standards and start/stop subsidies, to optimise the pathway to maximum efficiency? The light bulb transition of the last two decades is one of the successes of energy efficiency: from the old incandescents (15 lumens/watt) to halogen incandescents and CFLs, and then, finally, to LEDs (80 lumens/watt and prices falling 90% in ten years). … [Read more...]
Next-gen Solar farms that work at night, in the rain, and self-clean
With the worldwide roll-out of solar, raising the efficiency of energy conversion isnât just about the materials science of PV cells. Douglas Broom, writing for the World Economic Forum, runs through three âadd-onâ innovations. Researchers have found a way to generate electricity in the dark as panels cool during the night. A low-cost thermoelectric generator works using the temperature difference between the cooling solar panels and the … [Read more...]
Critical minerals: price spikes are affecting Wind, Solar, Batteries, EVs
A wide range of critical minerals are needed for the energy transition. Tae-Yoon Kim at the IEA summarises the reasons why we should expect this to be a year of price spikes due in the main to the Russia-Ukraine war and post-lockdown supply chain bottlenecks. So severe is the problem that the long record of declining costs in clean energy technologies like solar, wind, batteries and electric vehicles is being reversed. Although these crises will … [Read more...]
Wellbeing peaks at just 75GJ per capita: a reachable target for poorer nations to rise to (and rich ones to fall to)
Energy consumption is strongly linked to health and wellbeing, in particular life expectancy, infant mortality, happiness, food supply, access to basic sanitation services and access to electricity. But as Josie Garthwaite at Stanford University explains, new research is saying that those improvements cease above a certain number of gigajoules per person per year. Knowing that number will make understanding and setting targets much easier. For a … [Read more...]
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