On a request from the water sewage plant Gryaab in Gothenburg a power quality survey wasperformed. The voltages and currents have continuously been sampled in the incoming 10 kVsubstation HSP01 from April-August 2008. Power quality measurements were also performedin Gryaabs other 10 kV substation HSP04 fed from HSP01 and at the terminals of theinduction motor IN_PU4040 of 1.3 MW which controls one of the four large inflow pumps tothe plant. The reason for the latter measurement was due to registered negative transients eachtime the motor was connected to the grid. The cause of the transients could be explained by thecoupling in the substation, the ageing of the motor which could result in damage of thebearings or resonance in the motor circuit which amplifies high frequency harmonics.

On a request from the water sewage plant Gryaab in Gothenburg a power quality survey wasperformed. The voltages and currents have continuously been sampled in the incoming 10 kVsubstation HSP01 from April-August 2008. Power quality measurements were also performedin Gryaabs other 10 kV substation HSP04 fed from HSP01 and at the terminals of theinduction motor IN_PU4040 of 1.3 MW which controls one of the four large inflow pumps tothe plant. The reason for the latter measurement was due to registered negative transients eachtime the motor was connected to the grid. The cause of the transients could be explained by thecoupling in the substation, the ageing of the motor which could result in damage of thebearings or resonance in the motor circuit which amplifies high frequency harmonics.

On a request from the water sewage plant Gryaab in Gothenburg a power quality survey wasperformed. The voltages and currents have continuously been sampled in the incoming 10 kVsubstation HSP01 from April-August 2008. Power quality measurements were also performedin Gryaabs other 10 kV substation HSP04 fed from HSP01 and at the terminals of theinduction motor IN_PU4040 of 1.3 MW which controls one of the four large inflow pumps tothe plant. The reason for the latter measurement was due to registered negative transients eachtime the motor was connected to the grid. The cause of the transients could be explained by thecoupling in the substation, the ageing of the motor which could result in damage of thebearings or resonance in the motor circuit which amplifies high frequency harmonics.

On a request from the water sewage plant Gryaab in Gothenburg a power quality survey wasperformed. The voltages and currents have continuously been sampled in the incoming 10 kVsubstation HSP01 from April-August 2008. Power quality measurements were also performedin Gryaabs other 10 kV substation HSP04 fed from HSP01 and at the terminals of theinduction motor IN_PU4040 of 1.3 MW which controls one of the four large inflow pumps tothe plant. The reason for the latter measurement was due to registered negative transients eachtime the motor was connected to the grid. The cause of the transients could be explained by thecoupling in the substation, the ageing of the motor which could result in damage of thebearings or resonance in the motor circuit which amplifies high frequency harmonics.

On a request from the water sewage plant Gryaab in Gothenburg a power quality survey wasperformed. The voltages and currents have continuously been sampled in the incoming 10 kVsubstation HSP01 from April-August 2008. Power quality measurements were also performedin Gryaabs other 10 kV substation HSP04 fed from HSP01 and at the terminals of theinduction motor IN_PU4040 of 1.3 MW which controls one of the four large inflow pumps tothe plant. The reason for the latter measurement was due to registered negative transients eachtime the motor was connected to the grid. The cause of the transients could be explained by thecoupling in the substation, the ageing of the motor which could result in damage of thebearings or resonance in the motor circuit which amplifies high frequency harmonics.

On a request from the water sewage plant Gryaab in Gothenburg a power quality survey wasperformed. The voltages and currents have continuously been sampled in the incoming 10 kVsubstation HSP01 from April-August 2008. Power quality measurements were also performedin Gryaabs other 10 kV substation HSP04 fed from HSP01 and at the terminals of theinduction motor IN_PU4040 of 1.3 MW which controls one of the four large inflow pumps tothe plant. The reason for the latter measurement was due to registered negative transients eachtime the motor was connected to the grid. The cause of the transients could be explained by thecoupling in the substation, the ageing of the motor which could result in damage of thebearings or resonance in the motor circuit which amplifies high frequency harmonics.

On a request from the water sewage plant Gryaab in Gothenburg a power quality survey was performed. The voltages and currents have continuously been sampled in the incoming 10 kV substation HSP01 from April-August 2008. Power quality measurements were also performed in Gryaabs other 10 kV substation HSP04 fed from HSP01 and at the terminals of the induction motor IN_PU4040 of 1.3 MW which controls one of the four large inflow pumps to the plant. The reason for the latter measurement was due to registered negative transients each time the motor was connected to the grid. The cause of the transients could be explained by the coupling in the substation, the ageing of the motor which could result in damage of the bearings or resonance in the motor circuit which amplifies high frequency harmonics.

?Rätt avlopp på rätt plats? ? Livscykelanalys av tre enskilda avloppsanläggningarProblemen med övergödning i Östersjön och i Sveriges insjöar är stort och enskildaavlopp pekas ut som en central aktör, framförallt beträffande fosforutsläppen. I Sverigefinns det ungefär en miljon enskilda avloppssystem och nästan hälften av dessa har enså pass bristande vattenrening att de inte uppfyller gällande lagstiftning. Utvecklingenav nya tekniker för rening av avloppsvatten har länge strävat efter att minska utsläppenav övergödande ämnen, detta ibland på bekostnad av andra utsläpp, så somväxthusgaser och försurande ämnen.Det här examensarbetet har därför med hjälp av metodik från livscykelanalys (LCA)utvärderat tre enskilda avloppssystem med tanke på deras utsläpp av växthusgaser,försurande gaser samt övergödande ämnen. Då misstanke också fanns att de lokalaplatsegenskaperna påverkar de enskilda avloppssystemens totala miljöpåverkan,utfördes även en intervjustudie med ett antal av landets kommuner.

Storm water is defined as runoff from precipitation such as rain or snow. It is collected in sewage disposal systems and since it mainly originates from urban areas it can contain high levels of heavy metals, nutrients and oil etc. Polluted storm water is currently treated by different methods such as wet ponds, constructed wetlands and Filter strips. This study investigates these methods, which in earlier studies have shown to give varying results regarding their treatment efficiency.This thesis has been written on commission of SWECO VIAK and was aimed at studying those parameters that may affect the treatment efficiency of nutrients and heavy metals in storm water treatment facilities (STF:s). Through literature studies the dominating treatment processes in ponds and wetlands were examined.

Flera tusen människor dör en för tidig död i Sverige på grund av partiklar. För att minska partikelkoncentrationerna behöver utsläppskällorna minska drastiskt. Olika sätt att reducera mängden partiklar utreds i dagens forskning då vegetationens roll i staden är av betydelse för människors välbefinnande. Syftet med denna rapport har varit att lyfta fram vegetation som en positiv miljöpåverkare genom att studera dess förmåga att fungera som ett Filter. Rapporten har sammanställts genom litteraturstudie, dessutom har kontakt tagits med verksamma forskare inom området.

Detta examensarbete tar upp frågan om kommunikationsproblem mellan de komponenter som ingår i ADDAX systemet, till största del de problem som uppstår mellan router och mätare. ADDAX systemet är uppbyggt på ett hierarkiskt vis med ADDAX server högst upp och mätaren längs ned. Systemet kommunicerar via PLC ?power line comunication?. Uppgiften har varit att kartlägga hur mätsystemet fungerar, vilka geografiska problemområden som finns med avseende på kommunikations problem, lokalisering av störkällor, åtgärdning av dessa störkällor och framtagande av ett flödesschema som skall kunna användas av montörerna vid felsökning i systemet.

Vattenfiltren ALF R20 ? R60 från Alfa Laval AB i Lund används för att filtrera kylvatten till Alfa Lavals plattvärmeväxlare. Ytterhöljet av dessa Filter är gummerade som skydd mot korrosion, då havsvatten är mycket aggressivt. Syftet med detta examensarbete är att, genom produktutveckling effektivisera tillverkningen, få kortare ledtider och därmed få bättre lönsamhet. Genom att hitta alternativ till gummi-liningen hoppas Alfa Lavals underleverantör Liedholm Ramek AB i Helsingborg att spara tid i tillverkningsprocessen och genom att byta ut en fläns på själva konstruktionen hoppas man att korta produktionstiden. Via intervjuer med branschfolk i plast och gummibranschen hittades och utvärderades ett flertal alternativa material till gummeringen.

Miljökontoret i Luleå har sedan 1997 gett tillstånd till ett antal minireningsverk i Luleå kommun. I april 2006 fanns det totalt 42 hushåll med minireningsverk. Syftet med examensarbetet har varit att ta reda på vilka typer av minireningsverk det finns i kommunen, hur de fungerar, vad som egentligen kommer ut från anläggningarna och om serviceavtal finns. I examensarbetet finns en litteraturstudie över vad avloppsvatten innehåller och allmänt hur minireningsverk fungerar. De reningsverk som finns i kommunen är från tre olika tillverkare, arbetet innehåller en beskrivning av dessa anläggningar baserat på det material som finns från tillverkarna.

Kvarteret Tjället, vid Stadshagens tunnelbanestation. Där tunnelbaneuppgången möter den kuperade marken föreslås bostäder enligt Stockholms stad. Anvisningen inrymmer kring 30 lägenheter, och enligt kommunen är det i princip klart att det handlar om bostadsrätter som ska byggas. För att motverka den ökade likriktningen i klientel föreslår detta projekt att tomten upplåts till ett blandat boende.Två punkthus som inrymmer 109 lägenheter, blir bostäder åt seniorer och studenter. Två grupper som lätt slås ut från den i Stockholm mycket hårda marknaden för boende.

Websites today only offer simpler form of technical analysis and are not fun to use, therefore student decided to build a website that makes technical analysis a bit more fun by giving user possibility to experiment with settings for technical indicators and also see clear visible results from analysis. Student decided to build website in ASP.NET. Technical indicators for this project only consist of those who give buy and sell-signals via cross-over, no divergence or pattern finding.This project has three questions that define this project. It?s important that there is good functionality so that performing an analysis is perceived as simple, one question is therefore; what functionality for website is needed in order for analysis to be perceived as more simple?Technical analysis is a pretty complex subject and demands an interface that is perceived as easy to understand and easy to use, it?s therefore important that the interface is well designed, second question is therefore; how should the interface be designed to be user-friendly?When systems grow large they often become hard to develop and later on unmaintainable because of the accumulated complexity and dependency between classes, the code is a mess, the last question is therefore; how can the systems complexity be eased with object-oriented design principles?Jakob Nielsens ten heuristics for User Interface Design were used as inspiration for designing the interface for the website.