Buildings account for 36% of Sweden's energy consumption , and many homes are still heated with electricity. Existing houses therefore have a key role to play in reducing the use of electricity in Sweden.
Since a major share of European electricity comes from fossil fuels, exporting Swedish electricity can help reduce CO2 emissions from coal-fired power stations. This is shown in a dissertation by Anna Joelsson at Mid Sweden University. She has performed analyses of complete energy supply chains, from the natural resource to the electricity and heat in houses and shows that existing houses have a key role to play in lowering the use of electricity in Sweden.
"An improved house envelope and conversion from electric heating to district heating based on cogeneration can reduce primary energy consumption by more than 70% in a standard home built in the 1970s," says Anna Joelsson. "Energy efficiency is important if we want to make the best possible use of limited natural resources like biofuels."
Among other things, she compares various fuel-based energy systems and singles out bedrock heat pump and district heating based on cogeneration as particularly energy efficient. What's more, her analysis shows that conversions to all of the studied systems are profitable from a socioeconomic perspective.
When you build new houses you have ample opportunities to make them well insulated and well sealed, thereby achieving low heating requirements. However, Anna Joelsson claims that it is important not to forget the supply systems.
"A newly built passive house with fossil-based electric heating can entail higher primary energy consumption and CO2 emissions than a 1970s house with an efficient biofuel-based heating system."
Anna Joelsson from the Department of Engineering and Sustainable Development at Mid Sweden University recently defended her dissertation titled Primary Energy Efficiency and CO2 Mitigation in Residential Buildings.Questions can be directed to:
Lars Aronsson | idw
Despite government claims, orangutan populations have not increased. Call for better monitoring
06.11.2018 | Deutsches Zentrum für integrative Biodiversitätsforschung (iDiv) Halle-Jena-Leipzig
Increasing frequency of ocean storms could alter kelp forest ecosystems
30.10.2018 | University of Virginia
Researchers at the University of New Hampshire have captured a difficult-to-view singular event involving "magnetic reconnection"--the process by which sparse particles and energy around Earth collide producing a quick but mighty explosion--in the Earth's magnetotail, the magnetic environment that trails behind the planet.
Magnetic reconnection has remained a bit of a mystery to scientists. They know it exists and have documented the effects that the energy explosions can...
Biochips have been developed at TU Wien (Vienna), on which tissue can be produced and examined. This allows supplying the tissue with different substances in a very controlled way.
Cultivating human cells in the Petri dish is not a big challenge today. Producing artificial tissue, however, permeated by fine blood vessels, is a much more...
Faster and secure data communication: This is the goal of a new joint project involving physicists from the University of Würzburg. The German Federal Ministry of Education and Research funds the project with 14.8 million euro.
In our digital world data security and secure communication are becoming more and more important. Quantum communication is a promising approach to achieve...
On Saturday, 10 November 2018, the research icebreaker Polarstern will leave its homeport of Bremerhaven, bound for Cape Town, South Africa.
When choosing materials to make something, trade-offs need to be made between a host of properties, such as thickness, stiffness and weight. Depending on the application in question, finding just the right balance is the difference between success and failure
Now, a team of Penn Engineers has demonstrated a new material they call "nanocardboard," an ultrathin equivalent of corrugated paper cardboard. A square...
09.11.2018 | Event News
06.11.2018 | Event News
23.10.2018 | Event News
16.11.2018 | Health and Medicine
16.11.2018 | Life Sciences
16.11.2018 | Life Sciences