This study will identify the environmental impact in terms of carbon dioxide for a boiler house on behalf of Kvänum energi. The boiler central consists of a main building, which in turn contains multiple components such as boilers, pipes, etc, the boiler central uses pellets fuel. It also includes a silo and an ash container. The total weight of the boiler is about 63 tons. Each boiler has an output of 600 kW; the central includes three boilers with room for a fourth if necessary. The study has followed the ISO 14040 as far as it has been possible. The boiler central is manufactured at Kvänum Energi’s plant in Kvänum and then assembled on-site for the customer. When analyzing the system the entire product has been divided into smaller parts to make the analysis more manageable. The breakdown was made regarding the material. The conclusions from the calculations of emissions were that material was of greater importance to the environment than transportation. Design improvement proposal was mainly focused on materials and how any change of material would affect the environment and energy consumption. The ability to construct the building and silo in aluminum was investigated from the strength, price and environmental impact point of views. From design point of view, steel and aluminum are equivalent for the purpose, but in terms of cost, aluminum is more expensive. However the recycling option is significantly better for aluminum. EPS (Environmental Priority Strategies), which is a Swedish method developed for engineers at Volvo, was used for the calculation of environmental impact. When comparing steel and aluminum, the aluminum construction received a lower value regarding carbon dioxide i.e. better from an environmental perspective. The study includes a short survey on a transport to a fossil fuel dependent country, and it is investigated whether such a transport would be justified. The transport would be by boat and truck and the resulting emissions from the transport is about 1 ton of CO2. In the study, Lithuania has been chosen as an example because it has the same climate as in Sweden, i.e. a large need for heating during winter, and also because that Lithuania has a high dependence of oil and gas for heating.

En stor andel av Sveriges bostäder och lokaler är beroende av fjärrvärmeleveransen. Energimyndigheten i Sverige påtalar att störningar och avbrott i fjärrvärmevärmeleveransen kan leda till allvarliga konsekvenser för individer och samhällsviktiga funktioner. Höga krav ställs på fjärrvärmesystemen som förväntas kunna leverera en trygg energiförsörjning till alla kunder, oavsett tid på dygnet. En viktig åtgärd för att öka leveranskvaliteten i fjärrvärmesystem är att säkerställa tillgängligheten på produktionsanläggningar.   Energibolaget Sandviken Energi AB (SEAB) arbetar aktivt med frågeställningar som rör leveranssäkerhet i fjärrvärmesystem. SEAB har genom energikonsultbolaget FVB Sverige AB anlitat en praktiserande student för att undersöka hur leveranssäkerheten i Sandvikens fjärrvärmenät kan öka med hjälp av två externa samt en mobil panncentral. I studien riktades fokuset på prioriterade kunder, leveranskvalitet samt risker i fjärrvärmesystemet.   Tillvägagångssättet i studien karaktäriseras av en simulering och optimeringsstrategi till vilket beräkningsverktyget NetSim använts. Simuleringarna baserades delvis på bedömda risker i fjärrvärmenätet, framtagna i intervjuer med nyckelpersoner inom SEAB. Utifrån riskbedömningen har sex olika driftscenarier konstruerats och simulerats i ett flertal olika temperaturfall. Scenarierna representerar driften av produktionsenheterna och innehåller bland annat ett basscenario då alla produktionsenheter i nätet fanns tillgängliga. I resterande scenarier simulerades konsekvenserna av driftstörningar i anläggningens olika produktionsenheter.   Resultaten från studien visade på en fullgod värmeleverans i alla temperaturfall i fyra av sex driftscenarier. I två av driftscenarierna var den tillförda värmeeffekten för låg för att tillgodose kundernas behov fullt ut. En av slutsatserna som drogs var att när huvudproduktionen i nätet ej fanns tillgänglig, räckte inte värmeeffekten i nätet till för att försörja alla kunder vid alla temperaturfall. / A large proportion of Sweden's homes and premises depend on district heating delivery. The Swedish Energy Agency points out that disruptions and interruptions in district heating supply can lead to serious consequences for individuals and socially important functions. An important measure to increase the delivery quality in district heating systems is to ensure the availability of production facilities.    Through the energy consulting company FVB Sverige AB, Sandviken Energi AB (SEAB) has hired a practicing student to investigate how delivery security in Sandvikens district heating network can increase with the help of two external and a mobile boiler plant. The study focused on prioritized customers, delivery quality and risks in the district heating system.    The approach in the study is characterized by a simulation and optimization strategy for which the calculation tool NetSim has been used. The simulations were partly based on assessed risks in the district heating network, developed in interviews with key people within SEAB. Based on the risk assessment, six different operating scenarios have been constructed and simulated in a number of different temperature cases. The scenarios represent the operation of the production units and contain, among other things, a base scenario when all production units in the network were available. In the remaining scenarios, the consequences of operational disruptions in the plant's various production units were simulated.    The results from the study showed a satisfactory heat delivery in all temperature cases in four of six operating scenarios. In two of the operating scenarios, the added heat output was too low to fully meet customers' needs. One of the conclusions drawn was that when the main production in the network was not available, the heat output in the network was not sufficient to supply all customers in all temperature cases.

The thesis project Culture centre Björkhagen investigates how to rebuild and make additions to an unused central heating building in Björkhagen and transform it into a new culture centre. During recent years the area has been under great expansion with new residential buildings and many new inhabitants. Even if this has been carefully planned and executed by Stockholm municipality, no new public places where people can meet has been planned or built. By re-building this unused central heating building into a new public space, the new and old inhabitants get a place to meet. This characteristic small industrial building gets saved and by re-building instead of building new, the ecological footprint is hugely reduced. To help the new program I am adding a series of objects and make small adjustments to the building structure so that it can function as a public space. Doing much by doing little.