Sökresultat:
639 Uppsatser om Green pellets - Sida 1 av 43
Förbränning av pellets framställda av defibrerad granråvara :
Fuel pellets are in Sweden mainly produced from sawdust and cutter shavings. Before the pelletising process the raw material is dried to attain consistent moisture content and ground up in a hammer mill. In the densification process (pelletising) the ground material is forced through holes in a rotating die. This heats up the wood particles which cause them to soften and self bond. After the process the pellets are cooled, sieved and bagged.
The milling process creates a wide range of particle sizes.
Grön marknadsföring : En guide till grön framgång
The purpose of this thesis is to analyze green marketing and green brand building from a managerial perspective, with the intention to create an implementation guide for companies in the Swedish consumer market. The essay is based on a qualitative approach with a mixture of inductive and deductive elements. We have interviewed five people with close links to green marketing. We have during the study identified a number of touch points to be particularly important in the process of incorporating green marketing. These findings are presented in full in chapter five. We have found that the framework of green marketing is established during the company?s choice of green strategy.
Pelletering av tallspån : grundläggande studier
Wood pellets are an upgraded product of residuals from several wood processing industries, for example saw mills and pulp industries. The pellets are produced by pressing the milled and dried sawdust to cylindrical units with a higher density than the initial raw material. Pellets have great benefits compared to the raw material: high energy per volume, good transport and storage properties and homogeneity.
Several parameters collaborate in the whole process, which makes it complex. Wood is a heterogeneous material, chemically and structurally dependent on wood parts, habitat and storage procedures.
Kontinuerlig temperaturmätning i bädden på gratevagnar
Luossavaara-Kiirunavaara Aktiebolag (LKAB) är en gruvdriftskoncern med järnmalmsbrytning som huvudsaklig verksamhet. En av produkterna tas fram genom att raffinera järnmalm till pellets vilket är en efterfrågad produkt vid ståltillverkning. Vid sintring av råkulor till pellets är temperaturen väsentlig för att få så hög oxidation som möjligt av magnetit till hematit och för att få rätt fasthet. För att reglera värmen bör temperaturen mätas bland råkulorna eftersom det är kulornas temperatur som är det viktiga. Projektet går ut på att undersöka möjligheterna att mäta temperatur bland råkulor på gratevagnar som åker genom en pelletsugn med ett permanent mätsystem. Här ställs höga krav på mätsystemet på grund av miljö, portabilitet och drifttid.Miljöanalyser gjordes för att ta reda på vilken påfrestning ett mätsystem bör klara av. Förslag om placering av mätutrustning framtogs genom kartläggning av miljön.
Gröna aktiviteter : Att marknadsföra gröna argument i fastighetsbranschen
Undersökningen ämnar öka förståelsen för och analysera hur fastighetsföretag marknadsför gröna argument och hur de uppfattar att intressenterna bemöter dessa.I uppsatsen studeras följande forskningsfrågor:* Vilka strategier används hos fastighetsföretag inom ramen för green business?* Hur kommunicerar fastighetsföretag green business genom grön marknadsföring?* Hur uppfattar fastighetsföretagen att intressenterna bemöter deras gröna marknadsföringsargument?.
Green IS ? a Systematic Literature Review
This thesis provides a systematic literature review of a selection among current papers andarticles on Green Information Systems (IS). The main focus is on the current state of Green ISin academic research. This study aims at gaining a deeper understanding and a clearer view ofthe state-of-the-art of IS for environmental sustainability research, with the goal of clarifyingthe diffuse idea of what Green IT/IS is, and what differentiates Green IS from Green IT.To support the objective of this study, the articles selected for data analysis were collected byusing a systematic literature review as research and analytical method. Within the thesis, adescriptive angle with an interpretative character is used to analyse the data extracted.A theoretical framework based on concepts from sustainability, Green IS and Green IT isemployed in order to analyse and compare terminologies and frameworks used in the studiedarticles. Furthermore, the different dimensions of sustainability and the various terms used todescribe Green IS are analysed comparatively.The result and analysis are discussed in a conclusion confirming the on-going ambiguity ofthe terms Green IT and Green IS and the transformative power of IS.
Pellets - en framtidsmarknad?
With higher prices for oil and increased focus on fossil fuels impact on the environment the heating sector are searching for alternative fuels. Pellets are a quite new product whose production has risen exponential in recent years. Today there are small-, medium-and large-scale users, where the large-scale consumers are the heating sector. The heating sector is mainly using oil to cover the increased demand during cold periods.
The purpose of this study is to analyze the potential of pellets if it would replace thermal power plants oil and coal. The study will also analyze the economic impact a conversion would mean for a heating plant and if the pellet is a reasonable substitute.
2008 statistics from the Swedish district heating association were analyzed and a calculation was performed to determine how many tons of pellets is needed to replace coal and oil.
Gröna tak som del i ett hållbart stadsbyggande
Green roofs have seen a revival in the society of today. They provide many functions
of which both society as a whole and the individual can take part. In particular
extensive green roofs, that requires little or even zero maintenance, provides very
valuable functions. Green roofs affect our environment and our economy in a
positive manner as well as the physical expression of buildings.
In this bachelor thesis the impact of green roofs on society has been examined
throughout literature studies. The result as a compilation of contemporary research
in this field is presented together with a discussion about the use of green roofs in
general.
The two major arguments for an extended use of green roofs are, the high
stormwater retention capacity and the cost-benefits seen over time compared to a
conventional roof.
Urban green in Vientiane, Lao PDR : a minor field study
This is a Minor field study addressing the current situation
in Vientiane, Laos where focus lies on the green structures
past, present and future.
The city of Vientiane is growing rapidly and as a result of
this there is a increasing development. The once peaceful
capital known for it?s lush and green environment is
standing in a crossroad where important decision must
be made to preserve valuable areas. During 8 weeks inventories and observations where made resulting into a
proposal for future development. The proposal is divided
into three parts.
The urban fringe and surrounding landscape are still
quite undeveloped and have a great potential of green
wedges etc.
The city of Vientiane and the green network linking important recreational, commercial and cultural places.
Detailed proposal over certain green objects such as
parks and squares..
Grönskan i Staden : grönstrukturens utveckling, funktioner & innehåll
The report by Boverket (2004), Hållbara städer och tätorter i Sverige - ett förslag till strategi says that large and somewhat intact green areas are better than severalsmall. Linking rural natural areas with the city's green areas, improves the opportunities for recreation and biodiversity (Boverket 2004). To create this, there isneed for a green structure in the city and its surroundings. But how to create this structure and what are the problems with the green areas in the city today? Thescenario that more and more people choose to settle in urban areas is a trend which not appears to decline, and at the same time our green spaces in cities and ruralareas decreases (Boverket 2007).
Valuing Green: A Qualitative Study on the Priorities of Values, Personal Norms and Identity for Green Consumer Products
The purpose of this thesis is to contribute to a further understanding of the complexity in green consumer behaviour by examining how and why individuals priorities values, personal norms and identity in green consumer behaviour. The thesis employs a qualitative approach with an abductive strategy. The empirical data was produced through in-depth interviews with green consumers. Based upon the empirical findings and theoretical concepts, a conceptual model was introduced to illustrate how consumers prioritise between several values when assessing green products. The prioritisation is dependent on internalised values as well as the product function and the need that the consumer seeks fulfilled.
Påverkande faktorer vid valet mellan vanlig el och grön el - en studie av hushåll i Göteborgsområdet
To be able to hinder the global warming the emissions of greenhouse gases, carbon dioxide foremost, must decrease. By switching to green electricity, it is possible to reduce the emissions from electricity producing sources.In 1999, Swedenergy conducted a study about whether or not Swedish households would consider buying green electricity. According to the study, about 75 percent were willing to buy green electricity. 40 percent of these were prepared to pay a premium for green electricity. However, according to the results from the study, only one percent actually bought green electricity, and since 1999, this proportion has merely increased slightly.
Studie av kvartsits effekt på fasomvandlingarna under reduktion av magnetitpellets
Detta examensarbete har utförts vid LKAB:s FoU-avdelning i Luleå och vid LKAB:s metallurgiska laboratorium i Malmberget. LKAB har en världsledande position som producent av järnmalmsprodukter till stålindustrin. Huvudprodukten är magnetitbaserade pellets för råjärnsframställning i masugnar och direktreduktionsugnar. En förutsättning för en jämn och hög masugnsdrift är en god gasgenomströmning med ett lågt tryckfall. Abnorm svällning av pellets medför minskad porositet i pellets och minskade hålrum i beskickningen, vilket har en negativ inverkan på gasgenomströmningen.
Finns det samband mellan grönområden i närmiljö och ungas hälsa?
The objective of this master thesis was to study the relation between public green open space and health among adolescents in Uppsala municipality, Sweden. The aim of the study was to investigate if there is an association between the access to green open space in the living environment and adolescent´s health, in terms of fysical activity, self- reported health and overweight. The public health questionnaire ?Liv och Hälsa Ung 2009? provided data together with a map over public green space, where the measure taken into account is the proportion of public green space in the living environment. The study includes 3423 adolescents, 12-19 years old.
Uppvärmning med spannmål och trädbränslen :
This examination work brings up opportunities to invest in a construction for heating with grain
or pellets on farm level.
As example we have chosen Fröberga Gård which is a farm located in Östergötland outside of
Söderköping.
The farm`s residential buildings is to day heated with oil and electricity.
The result of our investigation shows that heating with grain is the best alternative, partly because
of economical issues but also because you can grow the grain on your own farm and by that you
can get better economy in your seed cultivation.
To grow 16 tonne of grain as is needed demand gives a insignificant increase of work.
Further an advantage is that no investment in machines is needed because all the machines witch
is needed already is in use on the farm.
In a situation where a new investment is needed as in the case we studied, is it often profitable to
invest in a integrated furnace. Because all the components are well adapted to each other, and
because that gives a high efficiency.
If you already own a well working furnace is it often most profitable to connect a burner to it.
It is important to know that heating with grain need more work than heating with pellets, because
the high contents of ash in grain.
Even if you choose pellets instead of grain the calculation shows good results.
Because peat is an excellent but fairly untested raw material for pelletsproduction we have
chosen to watch little more on its quality and conductions.
We discovered that peat has a high heating value which makes it possible to raise the heat value
in pellets through mix up peat and wood. Or you can make pellets with only peat and get a pellet
with high heating value. Even the calculation with peatheating shows good results..