Skanska Deep Green Cooling is a very energy efficient system for cooling of a building. The system use deep boreholes to cool the building. In the cold part of the year, when the temperature outside is lower than the temperature out from the boreholes, the boreholes will be charged with coldness and the heat in the boreholes are used to preheat the ventilation air. The system has potential to be more energy efficient by optimization of the pumps and the pressure drop in the system. Pressure drop is crucial for the pumps power requirement. In the report two methods are theoretic tested to lowering the pressure drop to lower levels. The first method work with full open control valves and the second method work with bypass of control valves. Energy saving of the two methods are 7 percent. / Skanska Deep Green Cooling är en energieffektiv metod för kontorskyla. Metoden bygger på att nyttja kylan som finns i marken för att kyla en byggnad. Under kalla delen av året så laddas berget åter med kyla samtidigt som värmen från berget förvärmer ventilationsluften. Deep Green Cooling bygger på principen att inte krångla till det i onödan, därmed har styrsystemet upprättats så enkelt som möjligt. Kylsystemet har i dag redan en mycket god verkningsgrad, men det finns möjlighet att höja den. Denna rapport tar upp två metoder för att effektivisera driften av Deep Green Cooling. Båda metoderna går ut på att minska onödiga förluster i systemet och därmed spara energi, teoretiska beräkningar visar på ungefär 7 procent i besparing.

Marin energi har stor potential att på ett relativt miljövänligt sätt utvinna energi ur bl.a. vind, vågor och strömmar. Prototyper och kraftverk för att skörda energi ur tidvattenströmmar har de senaste 10 åren blivit mer populärt, inte minst för att uppnå de miljökraven som ställts internationellt. Minesto är ett företag som utvecklar ett tidvattenkraftverk som heter Deep Green, som har ett väldigt unikt utförande, och har analyserats och jämförts mot två andra relevanta konkurrerande tidvattenkraftverk, DeltaStream och Seagen S. Studien har fokuserats på de vanligaste utförandena och variation vad gäller transmission, fundament, installation, strategi för att utföra underhåll och reparationer, reglering och elnätsanslutningar, för att sedan på ett mer strukturerat sätt förklara och beskriva de tre kraftverken. Deep Green är en så kallad tidvattensdrake. Tidvattensdraken består av en vinge med gondol och turbin som är monterad i havsbotten med ett tjuder. När tidvattnet förs över vingen börjar Deep Green att färdas framåt, på grund av den lyftkraft som bildas över vingen, i en bana formad som en åtta. Kraftverket uppnår sin märkeffekt på 0,5MW vid tidvattenströmmar på 1,4 m/s. DeltaStream och Seagen S är båda tidvattenkraftverk med horisontal axiala monterade turbiner, dvs. samma princip som vindkraftverk men tillämpad under vatten. DeltaStream och Seagen S producerar vid märkeffekt 1,2MW respektive 1,2MW - 2,0MW vid strömhastighet på 3,1 m/s respektive 2,5 m/s. Den jämförande analysen påvisar att Deep Green har störst potential och var bäst på 8 av 18 punkter. Analysen sammanställdes och rangordnades genom poängen 1-3, med avseende på egenskaper i förhållande till varandra då kraftverket med bäst egenskap under en rad fick 3 poäng och den minst bra får 1 poäng. Saknas uppgift ges ett poäng och likadana/liknande egenskaper ger 2 eller 1 poäng beroende på egenskap. Denna sammanställning gav Deep Green 42 poäng, Seagen S 36 poäng och DeltaStream 34 poäng. / Marine Energy has a great potential to extract energy in a relatively environmentally stable order from e.g. wind, waves and streams. Prototypes and power plants to extract energy from tidal streams have gotten quite popular the last 10 years, none the less because of the international environmental agreements. Minesto is a business that’s developing a tidal power plant called Deep Green that has a very unique design, and has been analysed and compared with two other relevant competitive tidal power plants, DeltaStream and Seagen S. This study has focused on the most common designs and variation by transmission, foundation, installation, strategy for maintenance and repairs, control and grid connections, to in a more structured way explain and introduce the three tidal power plants. Deep Green is a so called tidal kite. The tidal kite consists of a wing with nacelle and a turbine, and the unit is mounted to the seabed with a tether. Deep Green starts to move forward when the tide flows over the wing, due to the lift force, in a 8 shaped trajectory. The power plant reaches its max power extraction of 0,5 MW in tides from 1,4 m/s. DeltaStream and Seagen S are both tidal power plants with horizontally mounted turbines, by the same principle as wind power plants but design for underwater use. DeltaStream and Seagen S are producing 1,2 MW and 1,2MW – 2,0MW in tides from 3,1 m/s and 2,5 m/s, respectively. The comparing analysis shows that Deep Green has the greatest potential and was the best in 8 out of 18 points The analysis was compiled and was ranked through the points 1-3, with respect to characteristics relative to each other where the power plant with the best characteristic in one row got 3 points and the least good characteristic got 1 point. Is any information missing is 1 point given and equivalent properties get 2 or 1 point depending on the property. This compilation gave Deep Green 42 points, Seagen S 36 points and DeltaStream 34 points.

The environmental impacts that will affect earth due to continued population growth are staggering. They can be seen through the depletion of finite resources, increased pollution, and climate change. These environmental fluctuations will no doubt have a significant impact on how 21st century societies are designed. In order to reduce the potential catastrophes that these environmental issues will bring forth, societies must learn to adapt and accept new methods of building their cities.This paper delves into how the building industry can help address the issues that the world is facing environmentally. The goal of the study is to develop an understanding of how the building industry can push sustainable building practices. It looks at how Skanska AB, the largest Nordic building company, has focused their internal strategies to push towards sustainable building practices. This paper hopes to determine how with the help an internal rating tool, a global organization can reduce their environmental impacts. Through the examination of Skanska’s Color Palette™, key learnings were gained that could be used to reveal how private corporations can make good business sense out of sustainability. The paper also illustrate how Skanska has identified gaps between traditional certification tools and goals of true sustainability, and what that means for the built environment. The paper presents a case study of Skanska’s Color Palette™ as a key aspect of the company’s environmental journey. It looks at how the company was able to repair their reputation and illustrates how they have proved that they are serious about their goal of pursuing a sustainable future. The study involved secondary analysis of both public and Skanska documents, theoretical analysis and 4 semi-structured interviews.The analysis proved that the Color Palette™ is a tool that has great value for private corporations and is something that should be studied by other organizations seeking to reduce their environmental impacts. However, it was clear that if the earth is to progress sustainably, public policy, markes and internal organizations will all have to work together.