In a time where energy efficiency and saving measures are becoming more common terms in the energy industry, it is necessary to examine the district heating networks. One of the possible measures for efficient district heating is low-temperature secondary system. This thesis examines the potential benefits available with low temperature secondary heating systems versus conventional primary connections by comparing simulated models with the data collected from existing secondary system. The simulated cases in the report is modeled, calculated and simulated in the software NetSim. The results of the simulations demonstrated a reduced power requirement for the low temperature system with 4.8 kW, which approximately is a decreasing of 6 %. Heat losses from the simulated models turn out to be lower than the actual operating systems as a result of increased temperatures in the network. The difference between the simulated and real operating systems can therefore be useful in future projects for validation. Something that can be seen is that the line density of the secondary networks often is below what is considered as a profitable expansion. This does however not mean that secondary systems should not be built, as more aspects of a low temperature secondary system may be of interest to energy companies. The price models for secondary heat networks that were investigated differ, which could indicate that the market for secondary heat in district heating systems is young and under development. / I en tid där energieffektiviseringar och besparingsåtgärder blir allt mer aktuella begrepp inom energibranschen finns det anledning att undersöka fjärrvärmenäten. En av de tänkbara åtgärderna för effektivare fjärrvärmenät är lågtempererade sekundärsystem. Detta examensarbete undersöker vilka eventuella fördelar som finns med lågtempererade sekundära värmesystem kontra konventionella primäranslutningar, genom att jämföra simulerade modeller med insamlad data från befintliga sekundärsystem. De simulerade fallen i rapporten är modellerade, beräknade och simulerade i programvaran NetSim. I resultatet från simuleringarna påvisas ett minskat effektbehov för de lågtempererade systemet med 4,8 kW, vilket motsvarar en sänkning med ungefär 6 %. Värmeförlusterna från de simulerade modellerna visar sig vara lägre än de faktiska driftfallen till följd av ökade temperaturer i näten. Just skillnaden mellan de simulerade och verkliga driftfallen kan därför bli användbara vid framtida projekt för att validera projekteringen. Något som också kan utläsas är att linjetätheten (levererad MWh/meter kulvertledning) för de sekundära näten ofta understiger vad som anses som en lönsam utbyggnad, det betyder dock inte att sekundära system ej bör byggas, då fler aspekter av ett lågtempererat sekundärnät är av intresse för energibolagen. De prismodeller för sekundärvärme som undersökts skiljer sig åt vilket skulle kunna indikera att marknaden för sekundärvärme är ung och under utveckling.

<p>The aim of this thesis is to establish a “förvaltningsplans” template to Fastighetskontoret in Vasteras city. Further general information about the mission was given at our first meeting with Rolf Haraldsson, who happened to be our mentor and works at Fastighetskontoret in Vasteras city.</p><p>We agreed that using the software Excel was the most appropriate way to establish the template, because Fastighetskontoret also make use of Excel in their internal system, and also because Excel has a more friendly user interface and it is more easier to use compared to other software that have complex templates.</p><p>One of the first things we did was to get in contact with different fastighetskontors around Sweden so that we could either take part of their “förvaltningsplaner” or get referred to other material that could have been used. But this turned out to be an unsuccessful strategy. However, by searching on internet, course literature and databases we got a successful result.</p><p>The most common headlines were included in the template and were later discussed with our mentor from Malardalen University, Sone Nydert. Mr. Nydert who gave us viewpoints and directions on how we should develop our work further.</p><p>Thereafter, we had continual meetings with the mentor in Fastighetskontoret in Vasteras stad, Rolf Haraldsson, so that we could discuss and adjust the templates in line with the headlines in order for the template to match the fastighetskontorets internal headlines.</p><p>The template was finally tested in frosundaskolan and turned out to be a successful work.</p>

The aim of this thesis is to establish a “förvaltningsplans” template to Fastighetskontoret in Vasteras city. Further general information about the mission was given at our first meeting with Rolf Haraldsson, who happened to be our mentor and works at Fastighetskontoret in Vasteras city. We agreed that using the software Excel was the most appropriate way to establish the template, because Fastighetskontoret also make use of Excel in their internal system, and also because Excel has a more friendly user interface and it is more easier to use compared to other software that have complex templates. One of the first things we did was to get in contact with different fastighetskontors around Sweden so that we could either take part of their “förvaltningsplaner” or get referred to other material that could have been used. But this turned out to be an unsuccessful strategy. However, by searching on internet, course literature and databases we got a successful result. The most common headlines were included in the template and were later discussed with our mentor from Malardalen University, Sone Nydert. Mr. Nydert who gave us viewpoints and directions on how we should develop our work further. Thereafter, we had continual meetings with the mentor in Fastighetskontoret in Vasteras stad, Rolf Haraldsson, so that we could discuss and adjust the templates in line with the headlines in order for the template to match the fastighetskontorets internal headlines. The template was finally tested in frosundaskolan and turned out to be a successful work.

This report covers the creation and implementation of a 3D audio application using FMOD Ex API. The report will also cover a walkthrough of the basic principles of 3D and surround audio, examples of other uses of 3D audio, a comparison between available technologies today, both software and hardware and finally the result of the implementation of the 3D sound environment software, both server and client. The application was created to explore the use of 3D audio in immersive environments. There was no application like this available when this project was conducted. An inductive approach along with a form of rapid application development and scenario creation was used to achieve the results presented in this report. The implementation resulted in a working client and server software which is able to create a 3D sound environment. Based on a user evaluation the software proved to be quite successful. With the help of the implementation the user, or operator, can now create a sound environment for another user, or a listener. The environment is created and designed by the operator using the client side of the implementation and later played through the server side which is connected to a 4.1 speaker system. The operator can steer and add sounds from the client to an active environment and the listener can experience the change in real time. This project was conducted as a bachelor thesis in computer science at Mälardalens University in Västerås, Sweden.