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983 Uppsatser om Heat transfer - Sida 2 av 66

Datormodellering av en värmelagrande betongväggs inverkan på det termiska klimatet i ett växthus

This report describes the building of a computer model that makes it possible to simulate the thermal climate in a greenhouse. The computer model is built on the physical theory of heat exchange that occur in a greenhouse, such as radiation and convective heat exchange. The model also includes the heat storage that is active in a greenhouse.The computer model is used to simulate the thermal climate in a greenhouse under three periods, winter, spring and summer. It also investigates which effect a concrete wall has on the thermal climate in a greenhouse. The purpose of putting a concrete wall in the greenhouse model is to investigate the possibility to store heat during the day and then use this heat when the temperature drops during the night.The result from the simulations shows that a concrete wall levels the big difference in temperature that normally occurs under a day in a greenhouse.

Värmepumpars inverkan på elkvaliten

Modern technology and fast development of heat pumps, the hunt for savings in energy consumption and the strive for environmentally friendly energy sources, convenience, and financial profit, have made heat pumps a reasonable alternative for the heating of houses.When the heat pump starts it will consume a considerable amount of current, which may result in a short-lived voltage-drop if the power grid is weak compared to the start-up current.The company Fortum Distribution which owns and administrates electrical network is interested in an investigation that deals with heat pumps affect on the quality of electricity.The purpose of this investigation is to study fast electrical fluctuations (flicker) as a result of start-up currents for single as well as multiple heat pumps on the same electrical station and from this evaluate whether there will be any problems installing heat pumps..

Värmestyrning I Handske

This rapport is result of a project. The purpose of which was to design a circuit that is used in a heat glove. The heat glove is the technical aid which provides heat inside a glove.It is specially suited for old people who have problems with cold hands because of decreased blood circulation.There already was an old circuit in the glove that gives a constant current which develops heat from battery to glove through a circuit. The temperature is between 32 and 34 degrees.The problem with the existing circuit was to regulate the temperature. There is only on/off switch and there is no way to adjust desirable value of the temperature.In order to solve the problem the old circuit was investigated.

Mer än ett pris - : En studie om information, uppfattningar och användning av internpriser.

Background: When companies decentralize their operations into profit centers, transfer pricing often becomes an integral part in intracompany trade. A profit center may affect both revenues and costs and seek to maximize profit. Transfer Pricing is a complex subject because it is affected by a large number of factors including the profit centers will to generate profits. This leads us to the subject of decision-making in a transfer pricing-systems. On what grounds are decisions made? Are transfer pricing purposes, factors and interests taken into consideration? What type of information is used in such decisions, how is the transfer price issue perceived and how is it used?Aim: The purpose of this thesis is to analyze which type of information that is makes up transfer prices, how the transfer price is perceived by different parties and how it is used for decision-making.Completion: A qualitative study has been performed with current theory as a starting point.

Inventering av värmelager för kraftvärmesystem

When a combined heat and power plant produces heat and power it often faces a deficit of heat load during the summer or other periods of time. This heat is often unnecessarily cooled away or the power production has to be reduced or shut off. If it is possible to store heat from periods with low heat demand to periods with high heat demand one can get many benefits. Among these benefits are: increased power production, decreased operation with partial load, uniformly distributed load.To be able to store heat in situations like this long-term thermal heat storages are needed. In this thesis five different types of stores are presented: rock cavern storage, tank storage, pit water storage, borehole storage and aquifer storage.

Värmeåtervinning på förskolan Rymdattacken 1 : En jämförelse av värmeväxlare

In the spring of 2014 Sweco Systems AB were commissioned to design a ventilation system for a newly built preschool in Linköping. Terms from the client was that it cost efficiency would cope with the energy demands that are placed on the building. The unit chosen was a cross-flow heat exchanger, and this work is to compare it with two other heat exchangers to see if a more energy and cost efficient could have been chosen. The heat exchangers that was chosen for the comparison was a rotating- and a counterflow heat exchanger. Simulations have been made to the different heat exchangers by the manufacturers.

Samkörning mellan värmepumpar och fjärrvärme : Bostadsrättsföreningen Bogården

This diploma work covers an investigation over the heat - and hot water systems of thetenant-owner's association, Bogården. The heat - and hot water needs of Bogården aresatisfied by both district heating as well as three heat pumps. Implemented investigationshows that the heat pumps are not used in a profitable way. Apart from that, the reservepossibilities are small. There is also a risk of the growth of Legionella bacterium in thehot water system.Since the heat pumps are already installed, HSB-Gävleborg (responsible for Bogården)has a wish to investigate possible proposed actions for optimization of existing plant.After completed investigation, a new proposed action is presented.

SAS EuroBonus ? Tillgång eller skuld?: En fallstudie av hur värdet av ett lojalitetsprogram påverkar internprissättningen

This paper presents a study of Scandinavian Airlines? (SAS) frequent flyer program, EuroBonus. The study describes the transfer pricing of award seats between EuroBonus and the airlines within SAS. Furthermore, it aims to determine what effects market-based transfer pricing would have on EuroBonus, the airlines within SAS and consequently on the SAS Group. We have found that the existing transfer pricing does not provide incentives for the airlines within SAS to satisfy EuroBonus? demand for award seats.

Internprissättningsproblematiken i ljuset av förslaget om hemlandsbeskattning för europeiska koncerner

Throughout this thesis three main factors have been identified that can be out of significance for transfer pricing in multinational companies if the proposal for Home State Taxation is adopted. These factors are rules for calculation of the tax base, rules for dividing costs over periods and the tax rate. The formula for sharing profits will also become a factor that can have an impact on the European companies'incentives for transfer pricing interacting with above-mentioned factors. The effects of transfer pricing aiming at reducing the total amount of the taxation burden for a group of companies will be strongly reduced in the future if the proposal is adopted. Incentives for transfer pricing will loose importance, though not disappear altogether.

Spillvärmeåtervinning ur kylvattensystemet ismältverket på Sapa Profiler AB i Sjunnen

The smelting process at Sapa Profiler AB in Sjunnen generates large quantities of waste heat which is absorbed by the cooling water when the aluminum is cooled down. This paper is the result of a Master?s Degree Project aiming to present the conditions for recycling the waste heat. The cooling water absorbs the heat from the aluminum at an average rate of 600 kW and the paper shows that it can be used to replace electrical power consumption for heating the production plant?s facilities.

Brands Transfer of Meaning: An analysis of brands roles within product placement

Thesis purpose: The purpose of this thesis is to make a contribution, by connecting the transfer of meaning within the context of TV series. The meaning is transferred from the brand to the character in a TV series and then further to the viewer. To look at different role functions that are used in dramaturgy and narrative techniques, we will be able to see how the brand will have a specific role and thereby make the transfer of meaning more successful and effective. This role will have an important impact on product placement according to the meaning that will be transferred from the brand to the viewer, through the character. Methodology: By looking at the transfer of meaning process that is created from the brand, an unstructured observation is applied where we observed the placement and usage of different within a specific TV series. Qualitative strategy is conducted by using a case study.

-Jag kan detta, vad kan du? : Ledares och medarbetares uppfattning om kunskaps- och informationsöverföring i ett produktionsföretag

Introduction: More and more companies have realized that keeping and using the knowledge in their companies is getting more important to get or keep a competitive advantage. The companies? organizational culture and knowledge management are essential to create knowledge transfer. Also that the employees and the leaders of the company knows how knowledge- and information transfer arknkoe done best for them. That is why we chose our purpose to be:The aim is to understand the differences between managers and employees perception about knowledge- and information transfer in a manufacturing company.

Internpriser i praktiken: - en fallstudie

This paper presents a study of the Swedish public service television broadcaster - Sveriges Televisions (SVT) transfer pricing model. The aim of the thesis is to examine the motives for using transfer pricing from a theoretical perspective and if SVT?s transfer pricing model fulfils these motives. We will also examine any potential managerial problems the existing transfer-pricing model might cause and discuss how these could be solved. We have in our study found that the main motive for using transfer pricing within SVT is to allocate internal resources as efficiently as possible.

Modellering av Panna 5 Mälarenergi AB : utveckling av en beräkningsmodell med simuleringsverktyget IPSEpro

Heat and power stations are often in need of optimizations. A simulation model is a tool for findingways to optimize the plant. The scope of this diploma work is to develop a simulation model ofBoiler 5 at Mälarenergi AB. Boiler 5 is a circulated fluidized bed boiler that was taken into service inyear 2001. Among the included parts in the boiler are cyclone, convection part andINTREX-chambers.

Heat Maps : En metod för att uvärdera banor

Denna rapport har undersökt om game metrics genom heat maps kan användas för att hitta en choke point i en bana gjord till spelet Team Fortress 2. Game metrics och kvantitativa  metoder  erbjuder  ett  objektivt  och  nästan  automatiserat  alternativ  till kvalitativa metoder när det kommer till balansering. En bana har konstruerats med en choke point och har speltestats för att generera en heat map. För att undersöka om det går att hitta en choke point med hjälp av en heat map så har en enkät gjorts där respondenter   bads   hitta   choke   pointen   med   hjälp   av   den   heat   mapen   som genererades från speltestningen av banan. Alla respondenter lyckades hitta mitten av choke  pointen  med  hjälp  av  heat  mapen.  I  framtiden  skulle  arbetet  kunna  utökas genom  att  undersöka  om  användandet  av  bottar  eventuellt  skulle  helt  kunna automatisera  balanseringsprocessen.  Det  skulle  också  gå  att  undersöka  hur  olika klasser rör sig i en bana..

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