Blar i NTNU Open på forfatter "Eikevik, Trygve Magne"
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Energy Analysis of Evaporator System in Fertilizer Production
Ingebrigtsen, Vegard Byre (Master thesis, 2012)Yara Glomfjord is the north most production facility of compound fertilizer in the world and produces annually about 500 000 tons NPK and 200 000 tons CN. The general energy system of the process plant utilizes steam as ... -
Energy distribution concepts for Urban Supermarkets including energy hubs
Selvnes, Håkon (Master thesis, 2017)More and more of the earths population is living in urban areas. This indicates that using urban building plots for combined purposes will be important in the future. For this reason supermarket chains are developing new ... -
Energy efficiency improvement of industrial refrigeration systems within the pelagic fish industry
Gukelberger, Ephraim (Master thesis, 2014)Nowadays a high quality standard of fish products, either fresh or frozen, is desired. Therefore a fast processing is of the highest priority. Since the world-wide consump-tion is rising steadily, larger refrigeration ... -
Energy Efficient and Environmental Friendly Snow Production by Refrigeration systems
Bergwitz-Larsen, Kaja Wright (Master thesis, 2017)In the light of increasing global temperatures, the winters tend to be shorter and milder, with the periods of natural snow being drastically reduced. In order to counter the challenges of climate changes and maintaining ... -
Energy efficient and high quality thawing of cod in large scale
Wahl, Andreas (Master thesis, 2017)Thawing of block frozen cod is the main challenge of the overall industrial process due to the large variation in temperature after processing. The geometry makes the heat transfer slow and further difficult to conduct a ... -
Energy Efficient Drying Systems for the Dried Cured Meat Industry
Kvalsvik, Karoline Husevåg (Master thesis, 2015)Production of dry-cured meat requires large amounts of energy. To reduce the running costs in the dry-cured meat industry, which are closely related to the energy needs, eight energy systems for drying of meat were simulated ... -
Energy efficient Supermarket Refrigeration with Ejectors
Calvo Hoyas, Raul (Master thesis, 2014)Nowadays, the use of R744 or carbon dioxide has been increased as a working fluid in many refrigerant systems. Nevertheless, one disadvantage for use this refrigerant is the thermodynamic losses produced in the refrigerant ... -
Energy-efficient Supermarket CO2 Compressor Pack with Ejectors
Han, Yi (Master thesis, 2017)In this thesis, the background of re-implementation of CO2 and the description of refrigeration cycles with R744 compressor and ejector are introduced at first. The following is a case study performed to set up the R744 ... -
Evaluation of the Energy System in an Energy Efficient Commercial Building
Garaizar González de Echavarri, Sofía (Master thesis, 2021)Denne oppgaven fokuserer på ytelsen til energisystemer i passivhus-kontorbygg i Norge. Det er kjent at disse bygningene konstrueres for å minimere bruk og tap av energi, samtidig som gjenbruk av varme fra bygget maksimeres. ... -
Evaluering av energieffektive tørkesystem i solrike område
Øygarden, Olav (Master thesis, 2011)Hovudmålet med denne rapporten har vore å evaluera moglege løysingar for energieffektive tørkesystem basert på solenergi. Gjennom litteraturstudiet vert det funne at opne system for soltørking har ei rekkje generelle ... -
Exergy analysis of combined absorption-compression heat pump with ammonia-water mixture as working fluid
Ahrens, Marcel Ulrich; Ertesvåg, Ivar Ståle; Eikevik, Trygve Magne (Chapter, 2020)In this paper, investigations on the development of industrial high temperature heat pumps are carried out based on the exergy analysis of different compressor configurations. The combined absorption-compression heat pump ... -
Experimental analysis of the R744 vapour compression rack equipped with the multi-ejector expansion work recovery module
Haida, Michal Piotr (Master thesis, 2015)Present supermarket refrigeration systems, with carbon dioxide as a refrigerant, indicate high-efficiency performance and they are commonly installed in throughout Europe. The refrigeration systems with R744 have still a ... -
Experimental and theoretical analysis of high-temperature cascade heat pump
Hosseini, Seyedeh Fatemeh (Master thesis, 2021)Denne masteroppgaven beskriver den teoretiske og eksperimentelle utviklingen av en kaskade varmepumpe med høy temperatur. Industrielle prosesser har et betydelig varmebehov. Ved å gjenvinne spillvarmen fra industrielle ... -
Experimental investigation of a heat pump assisted drum drying system using propane (R290) as working fluid
Storslett, Espen (Master thesis, 2018)Drum dryers has been used for drying fabric for a long time. Drying is performed by heating air causing the relative humidity to fall before blowing the heated air through wet fabric in a rotating drum. The moisture removed ... -
Experimental investigation of a heat pump assisted drum drying systems using propane (R290) as working fluid - Eksperimentelle undersøkelser av en varmepumpeassistert tørketrommel
Wang, Yuyuan (Master thesis, 2017)Dryer is a wide spread machine for drying cloth in family. The traditional heat pump dryer use R134a as working fluid. But this working fluid do not meet the standard in aspect of global warming. R290 is a very good green ... -
Experimental Investigation of a Low-Temperature Three-Circuit Cooling System for an Electric Motor under Varying Loads
Konovalov, Dmytro; Tolstorebrov, Ignat; Kobalava, Halina; Lamb, Jacob Joseph; Eikevik, Trygve Magne (Peer reviewed; Journal article, 2023)This study investigates a low-temperature three-circuit cooling system for a 55 kW industrial electric motor. The cooling system provides an increase of the power-to-dimension ratio by 63%, together with an improvement in ... -
Experimental Investigation of evaporation of propane (R290) in small pipes
Allymehr, Ehsan (Master thesis, 2018)This master thesis discusses the two-phase boiling pressure drop and heat transfer characteristics of propane in different test conditions in an experimental setup. One smooth tube with inside diameter of Di=4.2 mm was ... -
Experimental investigation of the performance of a hydrocarbon heat pump for high temperature industrial heating
Bamigbetan, Opeyemi Olayinka; Eikevik, Trygve Magne; Nekså, Petter; Bantle, Michael; Schlemminger, Christian (Chapter, 2018)A 20 kW heat pump test rig has been built to investigate and validate heat delivery up to 110 °C using a vapour compression cycle. The heat pump is a cascade cycle with propane as the working fluid in the low temperature ... -
Experimental optimization of energy efficient drum dryer with a CO2 heat pump system
Li, Yashuo (Master thesis, 2013)SummarySince early twentieth century, drum dryer was used to dry clothes, and soon became a glowing industry. A drum dryer is a household appliance that is used to remove moisture from a load of clothing and other textiles, ... -
Experimental study of Isobutane (R600a) evaporation in microfinned and smooth tubes
Allymehr, Ehsan; Roux, Marie Isabelle; Álvarez Pardiñas, Ángel; Eikevik, Trygve Magne; Hafner, Armin (Chapter, 2020)Heat transfer coefficient and pressure drop of Isobutane (R600a) in an internally enhanced tube has been experimentally measured and compared to a smooth tube with the same outer diameter of 5 mm. The effects of mass flux ...