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983 Uppsatser om Heat transfer - Sida 15 av 66
Kognitiv träning - En litteraturstudie om dess effekt samt eventuella möjligheter inom audiologisk rehabilitering
In recent years cognitive training in order to improve cognitive abilities have becomeincreasingly popular and a lot of research has been conducted within this field. The natural agingprocess has a negative effect on many of our cognitive abilities and this relationship also has a strongconnection with hearing loss. Elderly with hearing loss is therefore a group that could benefit fromcognitive training. Objective: The purpose of this study was to investigate different types of cognitivetraining directed towards working memory in older adults and to examine the results observedregarding efficacy of this type of training and its transfer effect. Method: A literature reviewconsisting of 17 scientific articles published between 2005-2014.
Termisk analys av kompakta jordvärmesystem - Sensitivitetsanalys och korrektions faktorer baserat på fältmätningar i referensanläggningar i Östergötland
Chapter 1 defines the aim of the project and gives a general orientation about ground heat extractors. In chapter 2 physical processes that could be expected to be involved in the heat transport around a ground heat exchanger are discussed. It is shown from a literature study what amount of moisture transport due to thermal gradients there could be expected in a ground heat exchanger. The conclusion is drawn that the moisture gradient (Sr) is of same magnitude as the driving temperature gradient (°C). At the expected amount of increased moisture around the pipes the moisture transport could be considered to have a little effect on the brine temperature.
Lagring av kyla med horisontella markvärmeväxlare för kylning av koncepthus i Mellanöstern
Norconsult AB has developed a solarhousing concept, a house designed for the warm climate in the Middle East andwith large quantities of solar panels installed. The cooling system for the house was designed in an earlier report, the purpose of this thesis is to investigate the possibility of short and long term storage of thermal energy via an underground energy storage volume.Two different designs of the storage and three different filling materials have been integrated into a model to simulate different cases. The first design consisted of pipes installed in the ground, without insulation. The second design consisted of an insulated concrete box installed to prevent thermal energy from the surrounding soil to flow towards the lower temperature regions within the storage. The three different filling materials were dry saudi sand, water saturated saudi sand and the filling material used by the client for energy storage in Sweden.The results from the simulations show that neither of the designs, regardless of the filling material, managed to extract enough thermal energy from the house to the ground to uphold the demands of indoor climate.
Sannolikhetsbaseraddimensionering av geotekniskbärförmåga för pålar i grupp : En jämförelse mellan gällande normer och ensannolikhetsbaserad metod
The purpose of this thesis was to examine if users of digital music games may acquire skills from the games that may be of use in learning to play a real instrument, that is a non-digitally simulated instrument like an acoustic piano. We have used Gee?s theory regarding a possible interconnection between different semiotic domains, and how this connection may enable a transfer of skills between related domains. In this thesis we examine possible skill transfer between the domains ?digital games? and ?non-digital instruments?. To examine our question formulation we chose to conduct a pilot study from which we collected both quantitative and qualitative data.
Prognostisering av sättning frånhög uppfyllnad i Högbytorp : Numerisk?analytisk jäföelse samt uppmäta sätningar
The purpose of this thesis was to examine if users of digital music games may acquire skills from the games that may be of use in learning to play a real instrument, that is a non-digitally simulated instrument like an acoustic piano. We have used Gee?s theory regarding a possible interconnection between different semiotic domains, and how this connection may enable a transfer of skills between related domains. In this thesis we examine possible skill transfer between the domains ?digital games? and ?non-digital instruments?. To examine our question formulation we chose to conduct a pilot study from which we collected both quantitative and qualitative data.
Två presentationstekniker för grafer : deras styrkor respektive svagheter inom en bioinformatisk kontext
This degree project has been carried out in cooperation with Enertech AB in Ljungby and is pilot study to automating all current manual soldering. The soldering process accounts for a large part of the processing cost in the production of a heat pump. The process is also a quality risk and has a major impact on the lifetime of the final product.The Main task of this project has been to evaluate automation of the soldering process, to develop automation solutions and a principle layout, to draw the design changes required for the automation and to calculate the supposed solution.This pilot study has resulted in a suggested automation solution using laser as a heat source for soldering. Calculations of the solution show that a automating a laser soldering cell is very profitable..
Vidareutveckling av PV/T-receiver för koncentrerat solljus
The rising demand for electricity and heat raises a big challange for the society and engineers. Many products have been introduced to the market to supply more energy to the energy systems. Absolicon AB is a Swedish company that develops and markets a combined heat and power generating product. The product, Absolicon X10, uses a parabolic trough to concentrate the radiation of the sun onto a receiver. The receiveris equipped with mono crystalline solar cells and is cooled by a circulating liquid media.
Biogas till kraftvärme på Wapnö : en projektanalys utifrån ett företagsekonomiskt perspektiv
Biogas is a gaseous fuel, rich in methane, produced through a biological route in an anaerobic digester. A gas engine generates combined heat and power, which can be used at the farm to reduce energy cost. The process also generates a digestate, with better utilization of nutrient compared to cattle manure.
The aim of this study is to analyze the profitability of a farm-scale biogas plant for combined heat and power (CHP) at Wapnö. Wapnö is an agriculture company located in the southern part of Sweden.
Transfer of training - En studie av överföringsprocessen av säljträning med avseende på motivation och målsättning
Titel: Transfer of training ? en studie av överföringsprocessen av säljträning med avseende på motivation och målsättning.Författare: Therése Eriksson & Lovisa SöderlundUppsatsnivå: Examensarbete i Företagsekonomi för kandidatexamen, 180 hp VT-14Handledare: Lars-Johan Åge, Jonas Molin & Jens Eklinder FrickDatum: 2014-05Syfte: Vi vill undersöka om och hur säljares målsättningar påverkar säljare att ta till sig säljträning och omsätta den i praktiken.Metod: Med syftet som utgångspunkt har en kvalitativ metod använts i undersökningen där empirisk data erhölls genom att utföra 12 semi-strukturerade intervjuer med respondenter från fem telefoni- och elektronikföretag i Gävle. En strukturerad, abduktiv analysmetod som gör det möjligt att analysera kvalitativ data användes för att analysera och identifiera mönster i materialet. Resultat: Studien visar att motivation är av stor betydelse när det kommer till säljträning och huruvida säljare väljer att använda sig av träningen. Det som motiverar säljare att använda sig av säljträning är huruvida det kommer leda till ett ökat försäljningsresultat. Vi ser också att motivationen till överföringen är beroende av säljarnas personliga mål eftersom målen har med deras egna värderingar att göra och det är dessa mål som främst driver säljarna.
Värmeväxlare med luftkonditionering för tvättstugor
The energy in laundry rooms, in form heated air, can be utilized with a heat exchanger. A concept and an early prototype of the heat exchanger have already been developed to show that the theory works. This report describes the continued development and construction of the product.A field study was made in order to investigate the environmental usage and establish the product design. The most common washing machine was used as a calculation model, and calculations were also made to estimate the amount of energy in the air. A previous analysis of the existing prototype is also presented in this report, to show the products potential capacity.
Effektiviseringsåtgärder i tryckluftsystemet hos Vattenfall Värme Uppsala
In this work an assessment of the compressed air system in the facilities of Vattenfall Heat Uppsala has been conducted. The facilities constitutes, among others, a combined heat and power plant, and two waste incineration plants. The compressed air is supplied primarily by seven rotary screw compressors and yearly electric energy consumption in these has been determined. Furthermore, the usage of compressed air has been mapped in order to find processes with energy savings potential. Several suggestions how to reduce the usage of compressed air have been presented, resulting in decreased need of electric energy and reduced CO2-emissions.The results show that total need of electric energy in the compressors, during a standard production year, amounts to 5.83 GWh.
Nätbutiker och Kundrelationer : Relationsmarknadsföring
Titel: e-Commerce and Relationships ? Customer Relationship Management This bachelor thesis is brought together to analyze the transformation from traditional marketing to Customer Relationship Management. The development in the technology world has made the marketing focus shift from products and their functionality to customers and value creation. Because of the tougher competition that developed from new channels of communication, corporations had to generate new sources of value for their customers in order to establish lasting relationships with them. Therefore we found it interesting to investigate how companies within the e-commerce business handle the transition towards customer relationship management.
Energieffektivisering i flerbostadshus för studentboende
Uppsalahem AB is a municipally owned real estate concern that owns and administrates housing for nearly 30 000 people. The company puts a lot of effort into reducing the energy use of their housing stock. This project is a master?s thesis in the energy systems programme at Uppsala University, carried out in collaboration with Uppsalahem. The aim of this thesis is to provide energy saving measures for fourteen student housing buildings in Uppsala, Sweden.
Klimatskärmens funktion : En jämförande analys av projekterade nybyggnationer i Östra Salabacke, ur ett energi- samt fuktperspektiv
The design of the building envelope affects the energy consumption of a building. As the energy requirements for new buildings are becoming more demanding, the performance of the building envelope must be improved. Energy efficiency and durability are important attributes to consider.This report includes investigations of the building envelope, moisture and passive solar energy. It is based on the analysis of two different buildings with different designs. These buildings stand as reference for two of the companies who are working on a new, climate smart, residential area in Uppsala, Sweden.Studies and analyses on energy consumption and moisture transportation were made.
Kunnig för uppdraget? En studie av kunskapsöverföring åt tillfälliga bemanningskonsulter
It can be difficult for young people to find their first job; a solution to this problem may bethrough temporary work at a staffing agency to gain their first experience. As temporary workers,individuals are often forced to frequently change their jobs, which require that the company'sprocesses for introduction are able to transfer the needed knowledge and the temporal employee´s capacity to quickly learn a new role. Knowledge management and knowledge transfer areimportant aspects to most organizations, but how are these aspects used when introducing temporarystaffing personnel to new work? The purpose of the study is to identify the process oftemporary staffing to identify possible suggestions for improvement based on principles ofknowledge transfer. The research question "How can the transfer of knowledge be developed forthe introduction of new staffing personnel?" is divided into sub questions;? ?How is the processto hire temporary staff performed??, ?What problems can occur in the process of introduction ofnew temporal staff?? and ?How can ICT be used to support the introduction of temporal staff??.The theoretical framework is based around theories of the context in which the knowledge transferred,what type of knowledge is to be transferred, the channels that are possible to use to transferknowledge through, employees function as channels to transfer knowledge with a special emphasison the role of the mentor, and the transferee's own motivation and the capacity to receivethe knowledge that is being transferred.To understand the process of hiring temporal staff, a survey was performed using open-ended interviewswith consultants at employment agencies, and with the support of the frameworkDELTA Meta Architecture.