Sökning: "Insulating oil"

Visar resultat 1 - 5 av 14 uppsatser innehållade orden Insulating oil.

1. 1. Design changes to simplify maintenance and condition assessment on a tap changer

   Master-uppsats, Jönköping University/JTH, Industriell produktutveckling, produktion och design

   Författare :Arvid Fermér; Jakob Modling; [2023]
   Nyckelord :Power transformer; Chemical degradation; Electrical insulation; Tap changer; Insulation Electrical; Transformer insulation; Insulating oil; Insulation condition assessment; Transformer; Power grids; Power distribution; Oil filled transformer; Transformer oil;

   Sammanfattning : This master thesis investigates a redesign for a maintenance tube, used for both sampling and draining transformer oil from a tap changer compartment. With the current design, one can do one or the other of sampling and draining. LÄS MER

3. 2. Effects of Immiscible Compressor Oil in a Flooded PSHE Evaporator : A Visual Study Approach

   Master-uppsats, KTH/Energiteknik

   Författare :Joel Blomfelt; [2022]
   Nyckelord :;

   Sammanfattning : This paper deals with heat transfer in plate evaporators, with a focus on the effects caused by carried-over compressor oil ending up in the heat exchanger. A common standpoint in literature regarding the effect of immiscible oil contamination, in for example an ammonia PHE evaporator, is that the oil can accumulate as a layer on the plate surface causing an additional thermal conduction resistance. LÄS MER

4. 3. Sustainability Evaluation of Transformer Insulating Liquid against UN SDGs

   Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

   Författare :Yi Liu; [2022]
   Nyckelord :United Nations; Sustainable Development Goals; evaluation method; triangle fuzzy number; petroleum; crude oil; gas; vegetable oil; soybean; rapeseed; United Nations; Globala målen; utvärderingsmetod; triangel fuzzy number; petroleum; råolja; gas; vegetabilisk olja; sojaböna; raps;

   Sammanfattning : To achieve a shared blueprint for peace and prosperity for people and the planet, the United Nations has defined the 2030 Agenda for Sustainable Development, including economic, social, and environmental sustainability as three pillars. This thesis work is aimed at building a sustainability evaluation framework to investigate the product, which in this study is transformer insulating liquid. LÄS MER

5. 4. Rock cavern as thermal energy storage

   Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Energivetenskap

   Författare :Simon Berglund; [2020]
   Nyckelord :Rock cavern; Waste heat; District heating; Intermittent operation; Sustainability; Heat storage; Carbon dioxide reduction; Bergrum; Spillvärme; Fjärrvärme; Intermittent drift; Hållbarhet; Värmelagring; Koldioxid reducering;

   Sammanfattning : In the fall of 2019, a comprehensive idea study was conducted on heat storage in two rock caverns located at Näsudden in Skelleftehamn and was part of the project course "Energiteknik, huvudkurs" at Luleå University of Technology. This idea study investigated the conditions of using waste heat from Boliden AB:s copper smeltery (Rönnskär) and storing this waste heat in two rock caverns and use them as seasonal thermal storage tanks, with the purpose of using the heat in the nearby district heating network, thus replacing some of the oil burned at Rönnskär. LÄS MER

7. 5. Green Roofs in Uppsala : Potential food yield and thermal insulating effects of a green roof on a building

   Master-uppsats, Uppsala universitet/Institutionen för geovetenskaper

   Författare :Sagnik Sinha Roy; [2020]
   Nyckelord :Uppsala; Urban Sustainability; Food Security; Energy Security; Resilience; Urban Agriculture; Green Roof; Thermal Insulation; Energy Conservation; .;

   Sammanfattning : Climate change has caused severe vulnerabilities for the global food production system and alternative agriculture methods are needed as a solution. Urban agriculture (UA) can be a sustainable solution, making the global food system more resilient and increasing the global food security. LÄS MER