30 uppsatser · sida 1 av 2
En studie om uppvärmning med pellets och flis
… boiler as a heating system. The aim of this thesis is to investigate whether wood chips or pellets is, from a sustainability standpoint, a suitable heating method for the guest house. A literature review and a field study are carried out to create an information base. The …
… development. Two storage trials were performed over six weeks with waste wood chips and stem wood chips stored in about 4.5 m high outdoor piles. A trial over four days in which waste wood chips was placed on a heated surface was evaluated. A study to test the possibility of …
… pellets were done for the raw materials sawdust, wet sawmill chips and energy wood respectively. New raw materials are already used by the large-scale pellet producers in Sweden. It is mainly the large-scale producers that have started to use new raw materials such as energy …
… district heating plant for all of the five buildings which we vill heat with wood chips. I thought that it would be interesting to compare there two alternatives because it vill be a pretty long culvertsystem for all this buildings and therefore see how that vill affect the …
… benefits the secondary heat will provide when being used for pre heating of wood chips to a kraft digester. The Master´s thesis focuses on three secondary heat sources; dry warm air, warm water and moisture saturated warm air located inside the pulp or paper mill. Two types of …
The moisture content in 10 deliveries of tree parts and 10 deliveries of wood residues were measured with different methods to analyze the quality of procedure used at Dåvamyran today. At the same time a survey was made on the measure procedures used at heating plants in Sweden …
… relation to oil it is profitable to change to any of the three alternatives: wood chips, wood pellets and grain. The most profitable option is to change to wood chips. This alternative has a payoff time less than three years and after that the annual saving compared to the oil …
… of 70s and the beginning of 80s, 18 terminals was built and used for chipping wood residue from clear cuttings. Most of the terminals was terminated before the 2000s but with the high oil- and energy prices that we can see today there might be a place for these terminals again …
… to calculate upon my parents? farm, which today heats the dwelling house with wood. This is very time-consuming work, time which could be spent on other work. The main objective for this study is to compare three different heating systems to decide how they differ considering …
Test av olika råvarumixer i pelletstillverkningen vid Rindi Västerdala AB:s bioenergikombinat i Vansbro
… pellets are a refined bio fuel mostly consisting of residues from sawmills and wood industry. At Rindi Västerdala AB's combined bio energy plant in Vansbro fuel pellets are produced, while the waste heat from the process is used for district heating. The pellets are produced …
… that carbon dioxide is fixed by calcium oxide under the formation of calcite. Wood ash, which is rich of calcium oxide, has been used for capturing carbon dioxide in biogas during the lab-scale tests. During the tests the composition of the ingoing biogas was 35 % carbon dioxide …
a comparative and kinetic study of thermal decomposition for Norway spruce stump, poplar and fuel tree chips
… thermal decomposition process. In addition, SEM analysis indicated that the wood surface structure was broken and destroyed by torrefaction process. Activation energy of untreated and torrefied biomass were determined, being in good agreement with data in the literature. Among …
tekniska, ekonomiska och miljömässiga förutsättningar för fjärrvärmeproduktion med lokalt skogsbränsle
… for a farmer cluster to build and run a heating plant, fueled with local wood fuel. The heating plant in the described scenario is 8 MW and will supply a village of 1000 houses, and is fueled with wood chips exclusively. Supplying a heating plant with fuel puts high demands on …
The study was carried out as a time study of five wood chippers placed on trucks,söcalled huggbilar. They are trucks with built?in wood chipper, chip bowl and crane pulling a chip trailer. The system is used for chipping wood fuel, transporting, and delivering the chips to …
… and to find new sources or ways to provide Hallsta with continuously and fresh wood material throughout the year. To find all the sources of today, data has been collected from Holmen and initiated persons have been interviewed. To find new sources, not already used by Holmen …
