• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 159
  • 27
  • 16
  • 5
  • 2
  • 1
  • 1
  • Tagged with
  • 215
  • 67
  • 63
  • 59
  • 30
  • 29
  • 26
  • 24
  • 23
  • 18
  • 16
  • 15
  • 14
  • 13
  • 12
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Det energiproducerande huset

Holmkvist, Johan January 2007 (has links)
<p>We are heading towards a huge switch of how energy is produced with fossil fuels being replaced by renewable energy sources. It is not difficult to replace the energy you use in the house and there is no need for futuristic technology. There are already many established products on the market such as high efficiency vacuum solar collectors, heat pumps & small wind power stations that can supply the energy being used in a house. </p><p>The company Sol & Energiteknik SE AB in Huskvarna has many different products which can reduce the need for an outside energy distributor. An average house in Sweden uses 15 000 kWh for heating, 5000 kWh for tap water and 5000 kWh for electricity. These figures are based on each household using 14 000 kWh for heating, 5000 kWh for tap water and 8100 kWh for electricity. A wood furnace delivers the heat and the electricity is bought from the electricity company Fortum. Before you decide to change how you heat your house or the way you get your electricity, you need to calibrate the dimension of your system. You should make your house more energy efficient and buy products that run on less electricity than your old ones.</p><p>By replacing the way of heating the tap water with 5 modules of Intelli-Heat vacuum pipes with the total area of 11,4 m2 which are orientated in a south direction with an angle of 90 degrees, you get 6200 kWh hot tap water from March to November. The demand for heating is covered with the heat pump - NIBE Fighter 1135; 6 kW. From 3600 kWh of electricity and a COP of 3 you get 11 000 kWh of hot water. All the heat is stored in a 2000 litres accumulator tank which should store the heat for three days depending on the outdoor temperature. </p><p>The electricity in the house is produced by a wind power station from Hannevind AB. An 11 kW plant can produce 20 000 kWh electricity when the wind speed is 6 m/s. At locations where the wind speed is lower than 6 m/s, the plant of course will produce less electricity. In Jönköping, where the average wind speed is 4,2 m/s, a plant like this will produce 6900 kWh/year. To compensate the lower energy production in the summer, when the wind speed is lower, you can rig up 10 m2 of photovoltaic panels. They produce about 1000 kWh electricity per year and are simply connected to the grid through a wall socket. </p><p>The grid will be used as a backup, which means, when you got shortage of electricity you buy it from the electricity company which owns the grid. When there is too much electricity you send it out on the grid so others can use the electricity. </p><p>The cost of a system like this will range from 200 000 to 460 000 Swedish crowns depending on where in Sweden you live. You have to adapt your system to where you live, if you for example live on a very windy location you may focus on the wind power station and maybe give up the heat pump. An annual cost of 33 000 Swedish crowns plus the cost of the electricity you have to buy from the electricity company, is quite expensive but you should keep in mind that the energy is as good as free when everything is paid after 15-20 years. </p><p>In locations where the wind speed is insufficient (below 4 m/s) you can choose to join a wind power cooperative. Then you can buy the electricity from the wind power – co operative to get a much better price than from an ordinary electricity company. One kWh electricity from Svensk vindkraftkooperativ costs 0,606 Swedish crowns unlike one kWh from for example Fortum where it costs 1,07 Swedish crowns.</p>
2

Det energiproducerande huset

Holmkvist, Johan January 2007 (has links)
We are heading towards a huge switch of how energy is produced with fossil fuels being replaced by renewable energy sources. It is not difficult to replace the energy you use in the house and there is no need for futuristic technology. There are already many established products on the market such as high efficiency vacuum solar collectors, heat pumps & small wind power stations that can supply the energy being used in a house. The company Sol & Energiteknik SE AB in Huskvarna has many different products which can reduce the need for an outside energy distributor. An average house in Sweden uses 15 000 kWh for heating, 5000 kWh for tap water and 5000 kWh for electricity. These figures are based on each household using 14 000 kWh for heating, 5000 kWh for tap water and 8100 kWh for electricity. A wood furnace delivers the heat and the electricity is bought from the electricity company Fortum. Before you decide to change how you heat your house or the way you get your electricity, you need to calibrate the dimension of your system. You should make your house more energy efficient and buy products that run on less electricity than your old ones. By replacing the way of heating the tap water with 5 modules of Intelli-Heat vacuum pipes with the total area of 11,4 m2 which are orientated in a south direction with an angle of 90 degrees, you get 6200 kWh hot tap water from March to November. The demand for heating is covered with the heat pump - NIBE Fighter 1135; 6 kW. From 3600 kWh of electricity and a COP of 3 you get 11 000 kWh of hot water. All the heat is stored in a 2000 litres accumulator tank which should store the heat for three days depending on the outdoor temperature. The electricity in the house is produced by a wind power station from Hannevind AB. An 11 kW plant can produce 20 000 kWh electricity when the wind speed is 6 m/s. At locations where the wind speed is lower than 6 m/s, the plant of course will produce less electricity. In Jönköping, where the average wind speed is 4,2 m/s, a plant like this will produce 6900 kWh/year. To compensate the lower energy production in the summer, when the wind speed is lower, you can rig up 10 m2 of photovoltaic panels. They produce about 1000 kWh electricity per year and are simply connected to the grid through a wall socket. The grid will be used as a backup, which means, when you got shortage of electricity you buy it from the electricity company which owns the grid. When there is too much electricity you send it out on the grid so others can use the electricity. The cost of a system like this will range from 200 000 to 460 000 Swedish crowns depending on where in Sweden you live. You have to adapt your system to where you live, if you for example live on a very windy location you may focus on the wind power station and maybe give up the heat pump. An annual cost of 33 000 Swedish crowns plus the cost of the electricity you have to buy from the electricity company, is quite expensive but you should keep in mind that the energy is as good as free when everything is paid after 15-20 years. In locations where the wind speed is insufficient (below 4 m/s) you can choose to join a wind power cooperative. Then you can buy the electricity from the wind power – co operative to get a much better price than from an ordinary electricity company. One kWh electricity from Svensk vindkraftkooperativ costs 0,606 Swedish crowns unlike one kWh from for example Fortum where it costs 1,07 Swedish crowns.
3

Disputatio de Hussi vita praesertimque illius condemnati causis

Horst, Dirk Gertrudus van der, January 1837 (has links)
Thesis (doctoral)--Rijksuniversiteit te Leiden, 1837. / Includes bibliographical references.
4

Självförsörjandehus : Byggnader som förlitar sig helt på självförsörjning och bevarar miljön / SELF-SUFFICIENT HOUSE : Buildings that are completely self-sustaining and preserve the environment

Ibraheem, Hiba January 2023 (has links)
Medan människorna längtar efter utvecklingen ökar antalet byggnader som byggs på global skala vilket leder till en ökning av energiförbrukningen och detta leder i sin tur till en ökning av nedgrävda utsläpp. Konsekvensen blir klimatförändringar som påverkar i hög grad individens sociala, hälsa och ekonomiska status. Byggsektorn är en av de största förbrukarna av energi och vatten och en förorenare av miljön. Efter EU:s beslut att hitta hållbara lösningar för att minska utsläppen kunde Sverige minska utsläppen från 9,8 miljoner ton av koldioxid under 2019 till 6,1 miljoner tonkoldioxid fram till 2023, men man har ännu inte nått målet att minska den till noll. Under de senaste åren har många delar i världen, inklusive Sverige, försämrats på grund av klimatförändringar och politiska förhållanden.  Många delar drabbats av torrt vatten och höga priser på mat och el. Många människor ägnade sig åt jordbruk i sina hem och använde förnyad energi men belastningen låg mest på lägenhetsägare som inte hade brist på plats. Detta projekt syftar till att bygga en prototyp av ett självförsörjande, låg kostnad, miljövänligt hus för att minska belastningen på medborgarna. Huset är byggt och drivs med den lägsta mängden utsläpp som ersätter cement och fossila bränslen, genom användning av jordresurser som ett hållbart byggmaterial, förnybar energi och grönt täcke för att minska utsläppen och ge en bekväm inre miljö.  Fokus ligger på folkliga byggmetoder och tekniker som har använts i tusentals år i olika länder runt om i världen. Dessa metoder används på ett sätt som står i proportion till alla klimat, särskilt det svenska klimatet, och med våra behov idag.
5

Passiva hus- En konkurrensfördel?

Larsson Lindgren, Karolina January 2008 (has links)
<p>uppsats om hur fastighetsföretag ser på passiva hus</p>
6

Huskonstruktioner under järnåldern i Dalarna, Gotland, Skåne, Uppland och Västergötland / Construction of houses during the iron-age in Dalarna, Gotland, Skåne, Uppland and Västergötland

Ekengren, Leif January 2011 (has links)
Discribes different houses in  use  during the Swedish Iron Age.
7

Passiva hus- En konkurrensfördel?

Larsson Lindgren, Karolina January 2008 (has links)
uppsats om hur fastighetsföretag ser på passiva hus
8

opera i stockholm, årstafältet

Lindberg, Erik January 2011 (has links)
ritningar över förslag på en ny opera i stocholm, årstafältet
9

Kázání na den Mistra Jana Husa / Sermons on the Day of Jan Hus

Zikmund, Ondřej January 2012 (has links)
The Master thesis "Sermons on a day of John Hus" researchs sermons, which were preached on 6th July on a day of John Hus. It is dividend into six chapters. The introduction presents the charakter of the study. The second charter concerns with history of the day of John Hus. The third charter look into casual sermons and casual services. A service on a day of John Hus is a kind of casual services. The fourth charter deals with particular sermons. In the fifth charter there is composed an image of John Hus on the base of these sermons. In the final charter there is a comparison of sermons with casualistic's requirement which were established in the third chapter.
10

Robotiserad tillverkning av prefabricerade väggelement

Hellsing, Manne, Almers, Fredrik January 2015 (has links)
This report includes a thesis carried out by Fredrik Almers and Manne Hellsing, students at Mälardalen University in the engineering program, Innovation and product design. The assignment has been carried out in behalf of Robotdalen (Västerås, Sweden) in the period 2015-01-20 – 2015-06-11. The assignment was to explore possibilities of manufacturing prefabricated wall elements using industrial robots. The task also included to determine which robot tools that was needed and also designing one of them. The purpose of the assignment was to develop the first robot tool required for the manufacturing and to investigate whether the production time can be reduced by 70 percent compared to manual work. To be able to address the problem in a scientific way, the project was split into three phases. The first concerning information gathering, the second concept development and the third the design of the tool. The data collection included analyzing literature, previous work that had been done in the project and conducting study visits. At this stage it was also revealed which tools were necessary and which one of these that would be designed. It takes six different tools to manufacture a wall element and the one that were designed was a multifunctional beam assembly tool. A function analysis and a requirements specification were also established in this phase. They were used as a basis for further work. The goal of the concept generation phase was to develop a final concept where the basic features of the tool was presented. The problem was divided into two parts and each part solution was developed and evaluated individually. Through discussions and the use of appropriate product development tools a final concept could be established. The functions of the final concept was to grab hold of the wooden beam, compress it with another beam and then nail them together. To solve this, existing components as grippers, pneumatic cylinders and linear units were used. The goal of the design phase was to go from a fundamental principle concept to a fully finished and fully specified design. To achieve this CAD were used to calculate the components strength and how they would work together. Trough contact and advice collected from the suppliers the various components were selected. The designing of the tool has been based on the requirement specifications and the function analysis. The result of this project is a robotic tool that manages to nail together two wooden beams with two nails in under five seconds. It does not require any help to accomplish this task and can handle several different beam dimensions. The tool is designed with a frame of aluminum profiles, whereupon the necessary components for the task are installed. Thus it is easy to maintain and change the design of the tool if needed. With the help of this tool, the production time for a wall element is reduced up to 90 percent, according to simulations in the CAD environment compared to manual work.

Page generated in 0.0243 seconds