As the number of different technologies producing power and providing storage increases, the grid is getting complicated. The best way to make it resilient against outages is therefore changing. The traditional way is to shut down the failing plant, leaving the rest of the grid to cope as best as it can with the change in voltage and frequency. Xi Zhang at the Energy Futures Lab, Imperial College, describes the research looking at multi-energy … [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...]
No Energiewende without Wärmewende: making Germany’s Heating emissions climate neutral (…nearly)
In Germany, space and water heating in buildings accounts for almost a third of total final energy consumption. Because over 90% of its 22m buildings are fuelled by oil and gas, that makes the sector emissions very intensive. The government’s ambition is to have a "nearly climate neutral building stock" by 2050. But although those emissions have fallen by 44% since 1990, progress has largely stagnated since 2011. Freja Eriksen at Clean 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...]
Will the German Climate Protection Programme 2030 miss its own targets?
On Friday, 20 September, the German Climate Cabinet agreed on the guidelines for German climate policy for the coming decade, set against the backdrop of EU targets. The core topic was additional CO2-pricing in the mobility and heating sectors. From 2021 a CO2-price of €10/ton will apply to the German transport and buildings sectors. The price will rise to €35/ton until 2025. But Simon Göss says the national emission trading system and new … [Read more...]
Developing world urbanisation: a great opportunity for smartgrids, buildings efficiency
Rapid urbanisation in the developing world means millions of new buildings are going up. Now is the time to make sure they are energy efficient from the start, avoiding the major “rich world” headache of retrofitting. Given most of the developing world exists in hotter climates, cooling – unchecked - could account for as much as 40% of final electricity demand in some countries by 2050. To keep a cap on that, efficient buildings and air … [Read more...]
Gas v Electric new buildings: U.S. standards agency backs gas with out-of-date data, says RMI
Official reports matter. That’s why the Rocky Mountain Institute (RMI) is taking to task the U.S.’s National Institute for Standards and Technology (NIST) which published a paper stating that all-electric systems are more carbon intensive and more costly than gas-fired systems in new buildings. The NIST paper assumed a high reliance on coal as the primary source for electricity generation in their Maryland case study. Those stats are out of date, … [Read more...]
District Heating: heat-as-a-service and sector coupling
Space heating and hot water account for around 70% of energy consumption in residential buildings. Any progress in buildings efficiencies will see overall energy consumption decline. But that presents a serious challenge to the existing business model: why invest in a sector that’s selling less energy? The answer is to change that business model, says Oskar Kvarnström, Energy Policy Analyst at the IEA. In doing so new doors are opened. At the … [Read more...]
India aims for competitively priced superefficient ACs
Cooling represents over 6% of the world’s total final energy consumption, and growing. Of the 2.8bn people living in hot tropical regions only 8% have air conditioners (ACs) - it’s 90% in the US and Japan. With growing affluence, most will buy cheap entry-level ACs, with their low efficiency and polluting refrigerants. To cope, India will need 600GW of new power generation capacity by 2050 – equivalent to the installation of 1,200 coal power … [Read more...]
36bn GWh: the “limitless” Geothermal from old UK coal mines
The Earth gets hotter by 2.5C to 3.5C with each 100m depth. It’s what makes geothermal energy possible, anywhere. In the UK geothermal could meet the nation’s heat demands for at least 100 years, say Jon Gluyas, Andrew Crossland and Charlotte Adams of the Durham Energy Institute. Properly managed it could last indefinitely. Given that heat does not travel well, geothermal must be developed locally. Fortunately, accessible heat lies beneath or … [Read more...]
Leaked German govt report: emissions target will be missed despite on-target renewables
A leaked draft of Germany’s Energiewende Progress Report 2019, due to be released by the economy ministry in May or June, predicts the country will miss its targets for reducing energy use and greenhouse gas emissions by wide margins. This is despite the inevitable emissions reductions due to the 2009 recession and being on track for renewables. If no other measures are taken Germany will reduce emissions by 33% by 2020, falling short of the … [Read more...]
UK: Despite progress, 100% low-carbon is still a long way off
The UK transition is often cited as a success story. Coal’s contribution has dropped from 40% to 6%. Wind, solar and hydroelectric now generates more electricity than nuclear. Demand for electricity has also fallen. The carbon intensity of Britain’s electricity has almost halved, from over 500g of CO₂ per kilowatt-hour in 2006 to under 270g in 2018. The National Grid now expects to be able to operate a zero-carbon electricity system by 2025. But … [Read more...]
U.S. buildings electrification hindered by “new” renovation policies that are already out of date
U.S. buildings renovation policies are not keeping up with technological progress and therefore risk slowing down electrification and the uptake of cleaner fuels, say Jessica Shipley and Donna Brutkoski of the think tank Regulatory Assistance Project (RAP). For example, there are policies and incentives that favour the installation of more energy efficient appliances, but ignore whether the appliance is greener. Put simply, policies need to … [Read more...]
U.S. innovative financing makes buildings energy efficiency affordable even to poor communities
Buildings energy efficiency is not moving fast enough to meet the Paris Agreement goals. Retrofitting old buildings is extremely costly and needs much more investment, as our previous articles have detailed. Innovative models of financing are urgently needed. In an article for Ensia, Nate Berg explains how by rolling upgrade costs into monthly bills for poorer communities, U.S. utilities are helping customers save energy and money at the same … [Read more...]
Transforming Heating and Cooling creates jobs, new businesses
The UK has had great success in reducing emissions: down 43% overall since 1990. But, like most places, Heating and Cooling is struggling. Mark Woodward, of The Smart City Alliance and Nordic Heat, sets out a plan for progress, and includes lessons from Europe. The focus is on four core energy efficiency activities: reduce, recover, store and distribute. He explains how this also opens up new business models: in one town in Sweden chemicals firm … [Read more...]
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