Sökresultat:
368 Uppsatser om Mean value engine modelling - Sida 24 av 25
Ethanol for Scania's Future - A Scenario Based Analysis
Abstract Title: Ethanol for Scania?s future ? A scenario based analysis Authors: Anna Hansson and Julia Persson Tutors: Annette Cerne ? Department of Business Administration, Lund University Jonas Holmborn ? Head of Advanced Combustion, Engine Development, Scania Lennart Thörnqvist ? Department of Energy Sciences, Faculty of Engineering, Lund University Problem: Oil-based products are the dominating fuels in the transport sector but alternative fuels are currently challenging the world-wide dominance. The large number of alternative fuels that are under development at present makes the future fuel-market impossible to predict. Scania?s ethanol project is associated with a number of uncertainty factors that are beyond the company?s control.
Utveckling och tillämpning av en GIS-baserad hydrologisk modell
A distributed hydrological rainfall-runoff model has been developed using a GIS integrated with a dynamic programming module (PCRaster). The model has been developed within the framework of the EU-project TWINBAS at IVL Swedish Environmental Research Institute, and is intended for use in WATSHMAN ? a tool for watershed management developed at IVL. The model simulates runoff from a catchment based on daily mean values of temperature and precipitation. The GIS input data consist of maps with soil type, land-use, lakes, rivers and a digital elevation model.
Arkitekttävlingar : fallstudie : projekttävlingStockholmsporten
The population growth and urbanisation in low-income countries bring issues of poor living standards and miserable sanitation conditions onto the agenda. If well-functioning waste management systems were developed, this could master some of the problems. The already existing local informal waste handling system that is common in many low-income countries, needs to be developed with proper sorting and composting solutions to decrease the environmental burden and improve the overall situation in the dense cities.
This master?s thesis project is performed with the intention of developing functional decentralised waste management units in the city of Pune, India.
Termisk hantering av litium-jon- batterier i elektriska drivsystem
The automotive market is currently undergoing a historical change where stricter emission legislations and ever increasing fuel costs have intensified the search for effective alternatives to the conventional internal combustion engine, which has resulted in a substantial trend towards electrification of powertrains. Storage of electrical energy is the fundamental component in this technology where the lithium-ion batteries are currently considered as the most appropriate solution. Lithium-ion batteries, however, as other types of batteries, can only be used efficiently and durably within a specific temperature range.This Master thesis has been carried out in collaboration with Electroengine in Sweden AB, situated in Uppsala, which has an ongoing project regarding development of a modular battery system for electric powertrains. The project is at a stage where an initial prototype has been developed which provides the foundation for this thesis. The study has addressed the battery system performance from a thermal perspective, in order to validate the ability of the system to create a thermally serviceable environment for the lithium-ion battery cells.
Klamningskoncept för kablage på motor : Examensarbete, produktutveckling - konstruktion
Detta examensarbete har utförts på initiativ av Scania CV AB. Scania är en världsledande tillverkare av tunga lastbilar, bussar och industri- och marinmotorer. Konstruktionsgruppen inom Scania som detta examensarbete utfördes vid är benämnd NMKA och är en del av avdelningen NM ? Engine development som bedriver forskning & utveckling av Scania motorer.Denna avhandling inom produktutveckling tjänar syftet som slutgiltigt examinationsmoment för civilingenjörsprogrammet Innovation och produktdesign på Mälardalens högskola. Arbetet har utgått ifrån en metod för produktutveckling som lärs ut i samband med utbildningen.Uppdraget har baserats på frågeställningen att utveckla ett robust klamningskoncept för kablage på motor, som uppfyller de ergonomiska och konstruktionsmässiga krav som Scania ställer på sina artiklar.
Analys av designalternativ för snabbare dynamik i kolkraftverk med koldioxidavskiljning
Combustion of fossil fuels is today the dominating source of energy. During combustion,carbon dioxide is formed. The carbon dioxide accumulates in the atmosphere,which raises the global average temperature on earth through the so called greenhouseeffect. The only way to reduce the emissions of carbon dioxide from combustionin a coal fired power plant is through carbon capture and storage (CCS).Post-combustion capture is a technology to separate carbon dioxide from the uegas after the combustion for efficient transport and storage. The steady state operationof coal fired power plants with post combustion capture has already beenthoroughly investigated on a pilot scale, however much work remains to investigatethe plants dynamic operation.
Garbage to gardens : design proposals for two decentralised waste management units in Pune, India
The population growth and urbanisation in low-income countries bring issues of poor living standards and miserable sanitation conditions onto the agenda. If well-functioning waste management systems were developed, this could master some of the problems. The already existing local informal waste handling system that is common in many low-income countries, needs to be developed with proper sorting and composting solutions to decrease the environmental burden and improve the overall situation in the dense cities.
This master?s thesis project is performed with the intention of developing functional decentralised waste management units in the city of Pune, India.
Downloading and filesharing through Peer-to-peer networks: the copyright versus the free access to the cultural products
The “peer to peer†(P2P) is a technology of downloading and filesharing between online - Internet - users by the mean of specified software. Since June 1999, the Napster software has made the happiness of millions of individuals who used it to obtain and share free audio files Mp3.
Rapidly, the major recording companies have prosecuted the Napster Company and managed to force it to close down. They were arguing against it for it is supporting the development on a large scale traffic of files protected by copyright and thus was threatening the whole music and movies economic world. Since fast Internet connections multiplied, "peer to peer" software and networks improved, so that this mode of exchange became an unprecedented success.
Today all cultural products, in particular films and music, are concerned with this free –of– charge distribution without any financial counterpart for the copyright holders. Two tools hold
today the top ranks and concentrate large traffic: eDonkey and eMule.
Packning av lastbilsbyggsatser på Scania
Government regulations and customs duties restrict the import of trucks to some of the markets to which Scania tries to sell their trucks. The distribution problem due to these regulations is solved by the foreign assembly department, KD, at Scania. This means that competence is needed and costs are added not related to Scania's core operations.The aim of this master thesis has been to analyse and to evaluate alternative ways of managing the packing operations considering cost, quality and work organisation. To study and examine the work methods and operations of today and also to present methods measuring the operations effectiveness and productivity.We have used the system approach to maintain totality and to understand the component's relation to this totality. Field studies combined with studies of relevant literature and studies of other companies operations have given us the knowledge and the understanding of the packing operations needed.
BIM projektering med Autodesk Revit: samarbete mellan olika
discipliner
Byggbranschen är ett verksamhetsområde som består av ett samarbete mellan flera olika discipliner. Varje byggprojekt har olika förutsättningar gällande tid, budget, resurser och kompetens. Oavsett typ, kräver byggprojekt en god samverkan mellan alla inblandade parter för ett framgångsrikt genomförande. En förutsättning för detta är att projektet har en bra samarbetsmetod mellan disciplinerna. En god utgångspunkt för att skapa en bra samarbetsmetod är genom att alla discipliner arbetar med en gemensam projektleverans som integrerar människor, system, affärsstrukturer och praxis.
Downloading and filesharing through Peer-to-peer networks: the copyright versus the free access to the cultural products
The ?peer to peer? (P2P) is a technology of downloading and filesharing between online - Internet - users by the mean of specified software. Since June 1999, the Napster software has made the happiness of millions of individuals who used it to obtain and share free audio files Mp3. Rapidly, the major recording companies have prosecuted the Napster Company and managed to force it to close down. They were arguing against it for it is supporting the development on a large scale traffic of files protected by copyright and thus was threatening the whole music and movies economic world.
The impact of climate change on agriculture in the Republic of Mauritius : a socio-econometric study on Mauritian farming
"Food security is a situation that exists when all people, at all times, have physical and economic access to sufficient, safe and nutritious food that meets their dietary needs and food preferences for an active and healthy life" (FAO Summit, 2003, pp. 28).Food insecurity is of concern regarding the Republic of Mauritius (ROM) since it is defined as a net food importing country. (Farming news, 2008). The impacts of climate change followed by their complexity could potentially have an increased risk effect upon the social and environmental welfare as well as the economic drivers in the ROM (www, UNESCO1, 2009). The primary victims when it comes to the impacts of climate change are the Mauritian agricultural producers since agriculture is highly dependent on climate stability, therefore affecting the yields of the producers.
Utvärdering av erfarenhetsbaserade lagernivåer och arbetssätt - En fallstudie på Volvo Cars; Skövde Engine Plant
SammanfattningSyftet med denna uppsats är att undersöka huruvida det genom en övergång från erfarenhetsbaserade arbetssätt till användning av vedertagna optimeringsmetoder finns möjlighet till kostnadsbesparingar för ingående lager i O-fabriken på Volvo Cars motorfabrik i Skövde (SkEP).SkEP dimensionerar idag sina lagernivåer på erfarenhetsmässiga grunder, vilket enligt teorierna inte är helt optimalt ur ett kostnadsperspektiv. Det antas därför att det kan finnas en stor förbättringspotential om SkEP istället börjar använda optimeringsmetoder för att beräkna lager- och orderstorlekar. SkEP upplever i dagsläget inte några större problem, däremot villde veta hur pass bra deras lagernivåer egentligen är. Motiveringen till varför just O-fabriken är intressant är att cylinderhuvudena som tillverkas där är de enda komponenterna som påverkas av den aggregerade slutkundsefterfrågan och därför även kan tillämpas som typexempel vid optimering av andra komponentlager.Metoden som används i uppsatsen är i första hand kvalitativ primärdata i form av intervjuer och observationer samt till viss del sekundärdata, i form av kvantitativ information från SkEPs interna datasystem, CDEC, och en teoretisk studie i ämnet lagerstyrning.Uppsatsen börjar med en teoretisk genomgång av ämnet, vilken till största del bygger på professor Stig-Arne Mattssons publikationer. Där tas de beräkningsmetoder som används i arbetet upp, så som Kapitalbindning, EOQ, SERV2 och beräkning av säkerhetslager.
Klassifikation på webben
The thesis concerns the use of classification schemes for organising resources in subject-based hierarchical search-services on the web. The aim is to investigate the different kinds of classification that are used, which fall into two groups: established respectively new classification schemes. This is attained by studying literature and the websites of each search-service. The prospects for using classification in a web-environment are discussed and divided into three major groups: browsing, control and cross-classification. One question at issue concerns how an established scheme manages to organise web-resources and whether this classification differs from the classification of new schemes and in what way.
Förbättring av Valeos produktionssystem med hjälp av de internlogistiska verktygen Small Boxes, Flat Storage och Linefeeder
Vår uppgift på Valeo Engine Cooling AB i Linköping har varit att förbättra produktionssystemet genom att utveckla internlogistiken mellan lagret och monteringsstationerna samt sättet att lagra material.Valeo är en grupp bildad 1980 genom en fusion av bilkomponenttillverkare. Totalt har Valeo 71500 anställda. De verktyg som Valeo rekommenderar för förbättring av internlogistiken är Small Boxes, Flat Storage och Linefeeder. Användandet av dessa verktyg stödjer de principer som finns inom Toyota Production System och Lean Production.Linefeeder är den person som förser monteringsstationerna med material. Han kör omkring med en dragtruck efter vilken han kopplar på olika vagnar.