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Showing result 1 - 5 of 32 essays matching the above criteria.

  1. 1. Thermal Analysis of Tap- Changers

    University essay from Uppsala universitet/Tillämpad mekanik

    Author : Daniel Lundberg; [2023]
    Keywords : Thermal analysis; COMSOL; tap-changers; heat transfer;

    Abstract : This thesis provides a way of mapping the temperature development of the tap-changer oil for some different standardized loading cases. The project was in collaboration with Hitachi Energy for one of their production cites situated in Ludvika, Sweden. The software used for the simulation environment was COMSOL 6.1 which is a finite element solver. READ MORE

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

    University essay from KTH/Energiteknik

    Author : Joel Blomfelt; [2022]
    Keywords : ;

    Abstract : 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. READ MORE

  4. 3. The Church of Jesus Christ of Latter-day Saints in Trollhättan Energy optimization

    University essay from Högskolan i Gävle/Avdelningen för byggnadsteknik, energisystem och miljövetenskap

    Author : William Wanli; [2021]
    Keywords : Energy performance; Energy retrofits; Energy optimization; IDA-ICE; LCC analysis;

    Abstract : The world is experiencing increasing energy usage owing to environmental impacts suchas climate change, Ozone layer depletion, and global warming. Energy usage is primarily categorized into transport, industrial, residential, and service sectors, with the transportation and industrial sectors taking up a considerable chunk of the energy use; Buildings partly determine the use of energy globally. READ MORE

  5. 4. Quantification of Swelling in Sealing Materials

    University essay from Lunds universitet/Centrum för analys och syntes

    Author : Johanna Möller; Paula Erlandsson; [2021]
    Keywords : elastomer; rubber; gaskets; NBR; EPDM; swelling; diffusion coefficient; polymer technology; Technology and Engineering;

    Abstract : The objective of this study was to quantify swelling in gasket materials to better predict the gaskets life span in heat exchangers. Alfa Laval produces plate heat exchangers, which are a common unit within the process industry. There are different types of plate heat exchangers, and one type is sealed with gaskets. READ MORE

  6. 5. Evaluation of a Switched Reluctance Machine in an Automotive Oil Pump Application

    University essay from Lunds universitet/Industriell elektroteknik och automation

    Author : Edvin Malm; August Wahlberg; [2021]
    Keywords : SRM; Switched Reluctance Machine; Instantaneous Torque Control; Average Torque Control; Flux Based Position Estimation; Sensorless; 4 2 asymmetric SRM; Technology and Engineering;

    Abstract : A Switched Reluctance Machine (SRM) is evaluated in terms of torque quality and speed ripple for a particular pump application. The aim is to give BorgWarner insight into the control methodology and possible applications for a Switched Reluctance Machine. READ MORE