Sökresultat:
983 Uppsatser om Heat transfer - Sida 44 av 66
"Om man inte gör det på Facebook" : Ungdomars uppfattning om sociala medier som demokratiagent
The purpose of this essay is to explore how social media affect the political orientation and commitment of youths. Three scientific questions highlight the purpose from different angles. The didactic perspective is discussed in the initial and closing discussion, and is analyzed in the corresponding chapter. Two methods are involved in the study; one survey and one interview with a focus group. The survey had a total of 98 respondents from four different classes, all in the first grade of upper secondary school.
Fönsterutredning för radhusområdet Skeppsvägen
Mitt examensarbete innefattar en fönsterutredning för radhusområdet Skeppsvägen i Bålsta. Fastighetsägare är Håbohus AB och examensarbetet har skrivits för Skanska Sverige AB. Arbetet har skrivits på plats i Bålsta där Skanska Direkt AB har eget kontor och erhåller idag totalentreprenaden för renovering av Skeppsvägen. Arbetets syfte är att klart och tydligt redovisa eventuell effekt och energibesparing vid byte av befintliga fönster och altandörrar.Undersökning av fönster och altandörrar har gjorts okulärt, med värmekamera och med fuktkvotsmätare. Vid den okulära besiktningen noterades färgsläpp på fönster.
Dewey i Sverige - En diskursanalys av den svenska bibliotekssektorns uttalanden om klassifikationssystemet DDK
Swedish libraries are currently discussing andimplementing the classification system Dewey (DDC).Most libraries in Sweden have used the Swedishclassification system SAB until recently. In 2008 TheRoyal Library of Sweden (KB) decided to switch fromSAB to DDC. Many academic libraries chose to followKB?s example and by January 2011 a switch was made atKB and at many academic libraries.The aim of this master thesis is to examine and analysethe library sector?s discussion that occurred before andduring the Swedish switch from SAB to DDC. The mainquestion asked is; What is being discussed about Dewey2010-2011 and in what manner? To organize and anlysethis discussion discourse analysis is used.
Termoelektrisk lagring i system med fjärrvärmeproduktion
With increased deployment ofintermittent renewable energy, such aswind and solar power, energy storagebecomes necessary to help reduceproduction peaks. Thermoelectric EnergyStorage is a method still in researchphase, which stores electricity in hotwater at a temperature of 120 ° C. Thisthesis aims to examine whether theThermoelectric Energy Storage would bepossible to integrate into existingpower generation such as a combined heatand power plant, and how the technologypotentially could function in theelectricity market. ThermoelectricEnergy Storage consists of a chargingprocess and a discharging process, bothoperating by the working fluid CO2. Toincrease the efficiency of theThermoelectric Energy Storage, wasteheat from the district heating networkis integrated.A model of the Thermoelectric EnergyStorage has been developed and it wascalculated by thermodynamic propertiesof the working fluid, CO2, in thevarious process steps.
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..
Luftfuktighetens påverkan på konstruktion och klimat i en berghangar
Aeroseum is an aviation museum located in an old military underground hangar. The ventilation system in the hangar is designed for the military purpose of the hangar. This design includes a solution with air flowing through the space between the construction of the hangar and the rock surface. The solution is intended to avoid a buildup of inflammable gases. This design leads too high humidity levels in the hangar.
Geotermi i Ungern : Undersökning av Ungerns energisituation inriktat på geotermi samt kapacitetsfaktorn för det största geotermiska värmeverket i Mellaneuropa.
Hungary?s share of renewable energy in 2010 was 7.9 %, and their renewable energy goal for 2020 is 14.65 %. Geothermal energy is one option that could help to achieve the goal, since Hungary has favorable bedrock, the temperature gradient is above average and thepermeability is high. Today Hungary is importing just over half of its primary energy supply. Because of political conflicts between nations Hungary wants to expand its own production of energy.
Individers erfarenhet av icke farmakologisk behandling vid långvarig smärta : En litteraturöversikt
Aim: The aim of this study was to highlighting the experiences of individuals of non-pharmacological treatment for chronic pain.Method: The study was designed as a literature review with aim to review andcompile the articles results. This study has been based on a systematic literature search of supplementing out of an unsystematic search were 11 articles were found.Results: The participants in the studies had experienced a good effect out of non-pharmacological treatments for their pain and a improved quality of life. Based on participants´ experiences of treatment two categories occurred: body awareness and relaxation. Body awareness arose through treatments like yoga, mindfulness meditation and CBT. Relaxation occurred through treatments, like music, heat, massage and meditation.Conclusion: This study highlights how non-pharmacological treatments is experienced by individuals with chronic pain and two key areas have been identified.
Commercialisation of inventions from a legal and business perspective
This thesis is about university spin-offs and the competition in high technology industries. In the light of efforts to increase the competitiveness of the European Union, an effective transfer of cutting edge technology from universities to the industry plays an important role. University spin-offs, start-ups founded to exploit academic inventions, are likely to face considerable market entry barriers. This is among other reasons due to high capital requirements for further technology development and lack of complementary resources. With a combination of relevant literature and empirical investigation, commercialisation of technologies within spin-offs is investigated and analysed.
Våtmarker för näringsretention i Lillån : var bör de ligga och vilken effekt kan vi förvänta
Construction of wetlands in the agricultural landscape may reduce nitrogen and phosphorus
transfer to streams, thereby reducing the eutrophication of lakes and seas. The agriculturalstream Lillån, a tributary to stream Sagån, ends up in Lake Mälaren and is transporting large amounts of these plant nutrients. The aim of this study was to estimate how hypothetical wetlands of different size and location may reduce nitrogen and phosphorus load from stream Lillån. Estimated nutrient retention in several small wetlands was compared to retention in a single large wetland based on existing data from the agricultural stream and from a nearby smaller stream. Retention in the stream was suggested to decrease along with the nutrient concentration in the water.
Uncord Audio - Formgivning av produkt för trådlös ljudöverföring
The thesis work was conducted with the company Free2Move AB. The company is located in Halmstad and is an acting provider of wireless communications for industrial customers, mainly focused on Bluetooth? technology.In today's society most people have their music on their computer, MP3 player or mobile phone. What if you could avoid the cable between your sound system and sound source and transfer music wirelessly instead? Together with the company's engineers, I have developed a new comprehensive product for wireless music transmission.
Från papper till pixel : Kvarnholmen studerad utifrån historiska kartor med stöd av GIS
Sweden has a long tradition as a mapmaking nation. Tens of thousands of historical maps,dating from the sixteenth century and onwards are still preserved in archives today, providinga rich resource for studies of city growth and changes in the landscape through time. For morethan ten years an effort has been made by public authorities to transfer this material frompaper onto digital media. Due to modern technology, as for example GeographicalInformation Systems (GIS), researchers have been given improved possibilities to study andanalyze this material. This study uses a qualitative approach, based on both literature studiesas well as map studies.
Energibalansberäkning
Abstrakt - As energy prices rise, energy-saving in buildings is becoming increasingly important. By applying different construction and installation technologies, to new buildings the energy consumption can be reduced effectively, compared to similar existing buildings. These technical measures are often an investment in the long term and will reduce energy costs significantly. The purpose of this report is to show how to reduce energy consumption in a small house. It is presented in this report that both building's technical saving arrangements (the sealing of a building) and an installation technical arrangement (changing from the F-system to the FTX-system) would reduce energy consumption in newly built detached houses, if compared with a similar existing house but without these technical measures. The report presents also detailed calculations showing how much energy an existing 2-storey house, built in the year 2007 in Eskilstuna, consumes and how much energy would be saved if these corrective measures were applied to a new building. It is also reported how much money would be saved each year over a 10 year period if the measures were applied. The results show that both solutions are a good investment in the reduction of energy consumption and hence the cost involved. Keywords: energy, heat energy, infiltration, FTX-system, free temperature effectively. .
Ersättning av Ringhals 3 med ett biobränslekraftverk
This study deals with the technical and economic feasibility of replacing the nuclear power plant reactor Ringhals 3 with a biofuel power plant. A technical investigation has been executed to determine which of the systems and components that could be reused and which ones would need to be replaced. The investment costs of the reconstruction have also been estimated. The cost of the electricity production has been calculated as well as the emissions of the new biofuel power plant. Based on the established rate of return, the lowest average spot price of electricity that makes the investment profitable has been calculated.
Förbättrad Kravhantering med hjälp av Lösningsinriktad Pedagogik
Abstract
The purpose of writing this thesis was to improve methods during requirements
engineering phase. Usercentred system engineering has some problem areas, which
are examined and verified to create a new guideline for developers. This
guideline tends to make requirements engineering more effective and help
developers create more concrete requirements.
It is not uncommon that system development projects ends up with unsatisfied
users or delay in deliveries. The reasons are different kinds of communication
problems between users and developers during verification of requirements.
There is a therapy model, called solution-focused therapy, used in family and
individual therapy. The model focuses on solutions for the future instead of
problems in the past.