364 uppsatser · sida 13 av 25
… global issues. To reduce emissions of greenhouse gases, large changes of the energy system are required. An increasingly popular solution is investments in local production of renewable energy resources like wind, solar or geothermal power. The following report examines the …
… fossil fuels, for example by an increased use of biogas. Biogas is a renewable energy source which is produced through anaerobic (oxygen free) digestion of organic material. The gas is a mixture of methane (CH4) and carbon dioxide (CO2) and can be among others used as fuel in …
exploring the possibilities of modeling forest fuel markets in a regional partial equilibrium framework
… Today some of these raw materials are increasingly used as inputs also in bioenergy production, largely driven by bioenergy promoting policies, and there are signs of increased competition for forest fuels which may have various and uncertain effects on the industries in …
a study on non-adopter views of a new technology
… PV-systems are also suitable for so called micro production, small scale energy production facilities, since it can be placed on practically any rooftop with the right solar conditions. In Sweden the usage of PV-systems has not yet gotten any wider spreading, even though the …
Klarläggande av framtida hållbarhet
… is sensitive to knock, have high flame velocity, low required autoignition energy and wide range of flammability. To avoid abnormal combustion and NOx, engines can be run with a lean fuel injection strategy. This helps but the result is lower power and torque output than the …
Research in solar energy is taking big steps in both solar heating and solar electricity. It´s not only the technologies alone, but also the combination of both solar electricity and solar heating which is what is called a solar hybrid. The idea of a solar hybrid is that a solar …
… reduce the weight on damaged tissue. The living tissue in the hoof can’t store energy as glycogen and is therefore depending on a continuous supply of glucose for its energy production. The purpose of the study was to determine if wedging (i.e. elevating) the heel could …
… radiation heat load is in many cases high. In a situation as on the pasture energy is transferred into the cow by solar radiation and from the cow by convection losses. When these were compared the result showed that the solar radiation gain often widely exceed the convection …
vindkraftsbranschens aktörers perspektiv på nätanslutning och tariffer
Wind power is a growing energy sector in Sweden. However, it still represents only a small part of the total electricity production, about 0.7%. In order to create good conditions and to facilitate the establishment of wind power in Sweden, the government has for example …
… could decrease the methane production and at the same time improve the gross energy digested. Nitrate and Sulfur are both good electron acceptors, but due to its toxic effects the use of nitrate in feed has been neglected. Recently scientists have recorded that animals adapted …
… inefficient production of steam for the manufacturing of paper. Unpredictable energy prices and modernisation of the current equipment has been the underlying factors to invest in a thermal power plant, mainly driven by garbage. This facility will not only use the steam for …
… coming etc. Things that also matters is the final use of the hemp. If it’s for energy production you don’t have to take notice about the strength of the fibres. Growers I’d talked to prefer to harvest their hemp in late autumn, in winter or even spring, because the hemp in this …
Summary Today energy prices are rising. As a result biomass fuel is getting more and more interesting. Wood chips is very popular, but also straw from grain production is on the table. Lunds Energi AB project a combined power and heating plant in Örtofta out of Lund. Wood chips …
… are not healthy for the animals and keeping nutrition values high. As the energy value is high and the protein value low in maize silage it is recommended to give maize in combination with some other forage, forexample clover. For enough structure hay or straw should be given …
Micro-power wind energy convertors have recently increased in popularity. The reasons for this are among other things the increasing cost of electric energy and enviromental concern. In this thesis the connection of these micro-power wind energy convertors to the utility network …
