447 uppsatser · sida 25 av 30
… an environmental assessment of total waste was conducted by using a life cycle assessment (LCA), that examines the environmental benefits of recycling production waste from Atlas Copco at Stena recycling. Atlas Copco is a company engaged in the development and production of …
… ecosystems have long been neglected as an important part of the global carbon cycle. However, research shows that most of the world’s lakes are net-heterotrophic and consequently emitters of greenhouse gases to the atmosphere. In many boreal and north-temperate lakes, most of …
… were found in the grains. The yield strength, ultimate tensile strength and cycles to fatigue failure were similar in the two joint types, but the Aristorod weld joint showed higher impact strength and elongation at break. The chemical composition showed that the SM-3A electrode …
… be the system that met the needs after calculations had been made. The hybrid cycle is effective in electricity generation and has the most important synergy effect of freshwater production. The results show that it is possible to cover both Tarawa’s present need of electricity …
… be the system that met the needs after calculations had been made. The hybrid cycle is effective in electricity generation and has the most important synergy effect of freshwater production. The results show that it is possible to cover both Tarawa’s present need of electricity …
… The appropriate methods will then be analyzed in a payback calculus and Life Cycle Cost calculus. The study shows that to preserve the building and its cultural value it is preferable with an insulation of the outer walls combined with window restoration. Among the measures …
… the warm surface water and the cold water at 1 000 m depth to run a Rankine Cycle. This technology can produce electricity and provide synergies like fresh water, air conditioning and aquaculture. A simulation program for three alternative OTEC systems has been created in order …
? Livscykelanalys av tre enskildaavloppsanläggningar
”Rätt avlopp på rätt plats” ? Livscykelanalys av tre enskilda avloppsanläggningar Problemen 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 …
Kan borrhålskyla ersätta en kylmaskin?
Syftet med rapporten är att göra en jämförelse av två olika metoder för att kyla ett fiktivt kontorshus som är 2 000 m² stort och beläget i Västerås. För att representera ett normalt kontorshus har kyleffektbehovet valts till 50 W/m² vilket ger totala kyleffektbehovet 100 kW. I …
Studier av tidåtgång för olika arbetsmoment vid uppstarten
Vid kalkylering inför en tunneldrivning finns det vissa svårigheter med att bestämma hur lång tid arbetet tar och framför allt vid uppstarten av produktionen. Det kan leda till att anbudsofferter blir felberäknade med avseende på både tiden och kostnaden. Vid en felberäkning av …
… av underhållspersonal. En ekonomisk sammanställning baserad på LCC (Life cycle cost) har fastställt att en investering kan vara lönsam inom 5 år. För Bodens omformarstation har ingen teknisk lösning presenterats.
energiflöden och kylning
… the cooling of data centers. Several means of cooling with the refrigeration cycle have been studied, as well as the feasibility of using free cooling in different parts of Sweden. In addition, the possibilities of transferring excess heat to a nearby district heating system …
För lager-, industri- och kontorsbyggnader
… implemented for the building envelope. Based on the program results LCC (Life-cycle cost) calculations have been carried out for all combinations, thus be able to form an idea of ??the combination and what kind of structure that is most economically tenable. A thermograph study …
Energibesparing vid frekvensstyrning av centrifugalpumpar ? en fallstudie
… period was two years and two months and the present value for the total life cycle cost of the variable speed system was 662.566 SEK lower than for the throttled system. As a consequence, Stora Enso Fors is advised to invest in a frequency converter for regulation of the system …
… loops in an efficient way and to do so at the lowest "cost" in terms of clock cycles as possible. This should also be compared against to code, compile and run a complete signal diagram directly. To increase the usability it should also be possibility to externally manage in …
