154,692 Works

Unfired clay – the green construction material

Emilie Kristiansen, Thea Gregersen & Kurt Kielsgaard Hansen
Unfired clay can be used as a green construction material alternative to ordinary concrete. The clay is mixed with sand, water and either crushed tiles or gravel. The method to process the clay in a wall construction is called pisé where the clay is stamped in layers inside the formwork. The clay has positive qualities regarding moisture and heat buffering of the inside air.

Unfired clay – the green construction material

Emilie Kristiansen, Thea Gregersen & Kurt Kielsgaard Hansen
Unfired clay can be used as a green construction material alternative to ordinary concrete. The clay is mixed with sand, water and either crushed tiles or gravel. The method to process the clay in a wall construction is called pisé where the clay is stamped in layers inside the formwork. The clay has positive qualities regarding moisture and heat buffering of the inside air.

Unfired clay – the green construction material

Emilie Kristiansen, Thea Gregersen & Kurt Kielsgaard Hansen
Unfired clay can be used as a green construction material alternative to ordinary concrete. The clay is mixed with sand, water and either crushed tiles or gravel. The method to process the clay in a wall construction is called pisé where the clay is stamped in layers inside the formwork. The clay has positive qualities regarding moisture and heat buffering of the inside air.

Sustainable playground

Anne Mette Vraa, Kirsten Vraa & Niels Henrik Mortensen
This project is based on developing children and youngsters understanding of energy production. We wish to create a playground that challenges children’s way to play and makes it exciting and rewarding to play. While playing we want to give the children an idea of what it takes to produce energy. Through this we hope to make them appreciate energy and affect them in their daily use of it. Ideas on how a sustainable playground can...

Superconducting wind turbines

Adam Hoffmann Klingest, Alexander Barington, Bjarke Nordentoft Madsen, Daniel Bjørneboe, Kean Hansen, Rosario Borrasso, Sébastien Massin, Stig Högberg, Walid Ziad El-Khatib, Bogi Bech Jensen, Jørn Bindslev Hansen, Asger Bech Abrahamsen & Mads Peter Sørensen
In this project we shall investigate the feasibility of using type II high temperature superconductors in electric generators of future off shore wind turbines. High temperature superconductors can be used to generate a considerable higher magnetic field than in classical magnet designs and thereby reduce weight. The purpose is to assess the technical and economical feasibility of using superconducting generators for sea based wind turbines producing 10-20 MW.

Statistical analysis of data from a sustainable community development project in Vietnam

Charlotte Kampp Davidsen & Per Bruun Brockhoff
ADDA (Agricultural Development Denmark Asia) has been implementing a sustainable community development project, financed by Danida, in six different provinces of Vietnam since 2007 with the aim of achieving increased local agricultural production. The project has trained 15.400 maize farmers through the participatory Farmer Field Schools (FFS) where they were taught improved cultivation techniques along with the benefit of collaboration. The aim of the current project is to examine specific data from before and after...

Solfangere belyst ved matematik

Andreas Gram Sørensen, Casper Vestergaard Nissen, Jacob Stilling Nørregaard, Jens Steemann Kristensen, Lasse Tidemann, Søren Wrang, Carsten Schmidt & Connie Ørbæk
This Project uses mathematical methods to analyse solar collectors. There are made some assumptions to make things easier but without too many changes it can easily be made more realistic. The project ends up with a couple of methods for finding the total energy intake of a solar collector. Some of the methods are easier to handle but harder to calculate. Finally the project analyses some examples that relate to the real life and it...

Solar Powered Stirling Engine

Jesper Hyldig, Jesper Oxbøl, Niels Hvid, Stefan Høngaard Andersen, Thor Thorup, Knud Erik Meyer & Henrik Carlsen
A Stirling Engine is an external combustion engine that can run on many different heat sources. The Stirling Engine has the capability to produce power from both bio-fuels and focused sun rays, thus making it a viable green technology. In our project, A Fresnel lens is utilized to direct the rays of the sun onto the heat exchanger of the Stirling Engine. The Fresnel lens is advantageous to a standard lens as it, due to...

Scheduling home applications to reduce energy consumption

Ana Rossello-Busquet & Villy Bæk Iversen
In order to optimize the energy production, users should avoid consuming energy at the same time to avoid energy demand peaks. This can be achieved by setting a maximum energy consumption per user’s house. In other words, the overall consumption of the user’s appliances cannot exceed the maximum kwh. This project will study how home appliances tasks can be scheduled to not exceed this maximum consumption by using priorities.

Removal of Nitrous Oxides from Flue Gas – at the Forefront of Legislation

Helene Kolding & Rasmus Fehrmann
Flue gas emissions have had a major impact on our environment, both as greenhouse gasses and due to their acidification properties. Removal of NOx gasses is largely performed by the state-of-the-art SCR method. However, a common byproduct of the SCR reaction is N2O, which cannot be removed by the SCR catalyst. In this course, I have studied new and promising SCR catalysts as well as potent catalysts for efficient removal of N2O. By providing an...

Redesign of Pavilion

Jakob Borup Jakobsen, Jonas Bo Andersen, Line Kagenow Svenstrup, Mathias Rangel Wulff, Pia Michelsen, Stine Ellermann & Charlotte Scheutz
This project aims to make use of the progress within material utilization and recycling in a redesign of the traditional pavilion that are used at Roskilde Festival among other places. The festival participants leave the pavilions as trash after only seven days of use, which has a negative impact on the environment since the pavilions primary consist of metal and plastic. The vision of this project is to make an alternative to the traditional pavilion...

ReaxFF modelling of enzyme catalysis

Peter Bjerre Jensen, Peter Fristup & Hans J. Aa. Jensen
Modelling of chemical systems has many advantages compared to what people normally think chemistry is (that is synthesis). Computers can model complicated chemical reactions much faster, than the time an ordinary experiment would take. In this project the so-called reactive force field, ReaxFF, which is capable describing chemical reactivity orders of magnitude faster than the current state-of-the-art methods, is developed. The method could be used to study chemical reactions and improve them thereby lowering the...

Profitability of Low Energy District Heating for Areas with Low Energy Buildings

Nagla Inese, Jørgen Erik Christensen, Peter Weitzmann & Alessandro Dalla Rosa
An efficient energy supply systems together with energy conservation in the buildings is a promising concept to reach sustainability in the building sector. Low energy district heating gives new opportunities of utilizing renewable energy. The general topic of the thesis is to develop a proposal of methods to make district heating systems competitive for areas with low energy buildings, from the economical and environmental point of view.

Phase III Biorefinery_Progeeks

Hemalata Ramesh, James Atwoki Mugabi, Kristina Ranc, Naleli Vad, Jens Ejbye Schmidt, Henrik B. Nielsen & Anna Belinda Thomsen
The purpose of the biorefinery is to obtain multiple products which can be used for energy production, in order attain sustainability while also being able to sell energy. The raw material being used is the waste of a Small Town, while the fuels being produced are Bioethanol, Biodiesel and Biogas. The energy requirements of the plant are mainly obtained from the burning of saw dust, lignin and biomass. While, the difference in energy requirements can...

Optimering af typehus til lavenergiklasse 0

Lykke Bruun, Pam Petersen & Svend Svendsen
Det bliver i rapporten undesøgt om der er muligt at opføre et typehus som et lavenergiklasse 0 hus, uden at foretage drastiske ændringer af huset. Der ud over skal der ikke være nogen modstridende faktorer, samt at der termiske komfort opretholdes.

Oil Pollution at sea and the effect on the fauna

Elvis Afriyie & Kresten Ole Kusk
Oil pollution at sea is one of the major environmental problems today. A good example is the oil release from the BP well in the United States of America and it's consequences. Therefore there is a need to prevent oil spreading to larger area and to migitate the adverse impact on fauna and on the environment. Some of the solutions to this problem is presented in my project.

Magnetic Room Temperature Cooling Using Stacks of Gadolinium Plates

Kasper Wigh Lipsø, Luise Theil Kuhn, Christian Bahl & Nielsen
Magnetic refrigeration is an alternative to conventional refrigeration. Where conventional refrigeration uses vapor compression cycles, magnetic refrigeration is based on the magnetocaloric effect, i.e. the property of magnetic materials to change temperature when exposed to a changing magnetic field. The technology is currently used for low temperature cooling (<10K). By implementing stacks of magnetic plates instead of powder, it can be optimized to yield a more energy efficient room temperature cooling than conventional refrigeration. This...

Life cycle check of LED street lighting

Johan Eriksen, Jonas Brandt Jakobsen, Nikolaj Agentoft Feidenhans’l, Michael Søgaard Jørgensen & Stig Irving Olsen
This project is a study of the emerging use of LED street lamps for the infrastructural lighting in Denmark. Through the study, LED street lighting is investigated through Actor-Network Theory and a Life Cycle Check is made, to make a comparison to the metal halogen lamp. These methods are used to estimate the LED technology's role in street lighting in Denmark and the potential impact it may have when compared to a more conventional street...

Industrial fermentation of hydrogen

Kasper Jensen & John Woodley
Oil-sands processing, gas-to-liquids and coal gasification projects which are ongoing, require huge amounts of hydrogen and is expected to boost the demand significantly within the next few years. Industrial fermentation of hydrogen recycle organic waste materials into hydrogen at little expense.

Fabrication of biopolymer cantilevers

Nikolaj Feidenhans'l, Nis Fisker-Bødker & Stephan Keller
With our novel production method biopolymer micro cantilevers can be manufactured cheap and easily, rendering the measurement of degradability a matter of a few days. Our micro cantilevers are made of the PLLA (poly-l-lactide), measure 100 x 500 x 10 µm (width, length, height) but are positioned on a supporting body chip to allow handling with tweezers. As biopolymers are to fragile to process with standard silicon techniques we developed a fabrication method using nanoimprint...

Environmental Management in event planning - a Life Cycle approach, the Roskilde Festival case

Alexandra Bonou & Stig Irving Olsen
This LCA-based study estimates the environmental impacts of the activities happening on the Roskilde Festival’s site during its 8 day length. The purpose is to prioritize policies and mitigation actions. The system boundaries include: audience transportation; accommodation, food and water consumption; electricity and fuel consumption; waste management. The impact assessment was carried out according to the EDIP method. The results revealed that main contributors to all impact categories are the transportation of festival goers and...

Energysaving sockets

Benjamin Lundsgaard, Ole Petersen, Rasmus Dahl & John Heebøll
Very few people would disagree that it is a good idea to save energy, either for environmental or economic reasons. The point of the smart socket is to inform the owner of the amount of consumed energy and gives the opportunity to easily control their energy consumption and thereby to save energy while sustaining or even increasing their comfort of living. Only few sockets needs to be installed since information is send through the electricity...

Energy Systainable Water Fountain

Anders Roikjær, Carl Haurdahl Mikkelsen, Kristina Rose, Lisbeth Kronborg Jensen, Thor Peter Andersen & Knud Erik Meyer
In collaboration with Fokdal Springvand A/S our group has sought to develop nozzles for the creation of laminar and hollow-jet water fountains. Hollow-jet water fountains have the advantage of using significantly less water, and thereby reducing the required pump-power. Different nozzle designs have been manufactured and tested, and the result was a laminar hollow jet able to maintain its integrity for up to 1 meter before collapsing in on itself. The result was a strong...

Energy harvesting from raindrops

Eddi Søgaard, Henrik Teglborg & Thomas Glasdam Jensen
In this paper we will investigate which parameters are important for energy harvesting from raindrops through a piezo based sensor. We will make a chamber filled with fluid or gas and a membrane to cover the chamber. Then connect the piezo based pressure sensor to the chamber so we can register how much pressure/energy can be gained from a drop. Then we will investigate which parameters are important such as: the drop height, drop frequency,...

Energy harvesting from raindrops

Eddi Søgaard, Henrik Teglborg & Thomas Glasdam Jensen
In this paper we will investigate which parameters are important for energy harvesting from raindrops through a piezo based sensor. We will make a chamber filled with fluid or gas and a membrane to cover the chamber. Then connect the piezo based pressure sensor to the chamber so we can register how much pressure/energy can be gained from a drop. Then we will investigate which parameters are important such as: the drop height, drop frequency,...

Registration Year

  • 2011
    154,692

Resource Types

  • Text
    103,598
  • Dataset
    14,174
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    13,926
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    2,478
  • Collection
    974
  • Event
    756
  • Workflow
    33
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    7
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    1

Affiliations

  • French National Centre for Scientific Research
    38
  • Duke University
    21
  • University of British Columbia
    20
  • The University of Texas at Austin
    16
  • Centre for Ecology & Hydrology
    13
  • UK Centre for Ecology & Hydrology
    13
  • University of Montpellier
    10
  • University of Sheffield
    10
  • University of Cambridge
    9
  • Indiana University
    9