Blar i NTNU Open på forfatter "Eikevik, Trygve Magne"
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A comparative Analysis of Propane and Ethylene Glycol as Intermediate Fluid in a LNG Regasification System
Solberg, Erik Langaard (Master thesis, 2015)A LNG regasification system with intermediate fluid vaporizer is studied. Two different intermediate fluids (IF), propane and a mix of mono-ethylene glycol and water, are compared for use in the system. The regasification ... -
A steady and quasi-steady state analysis on the CO2 hybrid ground-coupled heat pumping system
Jin, Zhequan; Eikevik, Trygve Magne; Nekså, Petter; Hafner, Armin (Journal article; Peer reviewed, 2017)This article contains the steady and quasi-steady state analysis on a CO2 hybrid ground-coupled heat pumping system for warm climates. The hybrid system uses a combination of ambient air and ground boreholes as a heat sink ... -
Air reversing CO2 heat pumps
Andreassen, Hanne Elisabeth Bø (Master thesis, 2010)CO2 is an environmentally friendly refrigerant that has a no global warming potential when used as refrigerant. The current refrigerants used for air conditioning in public transport are chemical components, and have a ... -
Analyse av varmeanlegg ved Sykehuset Østfold Kalnes
Prestvold, Kristoffer (Master thesis, 2019)Sykehuset Østfold Kalnes er oppvarmet av fjernvarme fra Kalnes energisentral med en temperatur på 60 ⁰C. I en av kundesentralene på sykehuset oppleves problemer med å oppnå ønsket turtemperatur på tappevannet. I denne ... -
Analysis of the Trilateral Flash Cycle for Power Production from low Temperature Heat Sources
Trædal, Stian (Master thesis, 2014)SummaryIn this study, the Trilateral Flash Cycle (TFC) and the Partially Evaporating Cycle (PEC) have been analyzed and compared to the Organic Rankine Cycle (ORC) for power production from low temperature heat sources. ... -
Annual energy performance of R744 and R410A heat pumping systems
Jin, Zhequan; Eikevik, Trygve Magne; Nekså, Petter; Hafner, Armin; Wang, Ruzhu (Journal article; Peer reviewed, 2017)This work compares the annual energy performance of heat pumping systems using R744 and R410A as refrigerant. Focus is the annual energy efficiency of R744 hybrid ground-coupled heat pumping system. The hybrid system uses ... -
CFD Analysis of R744 Ejectors
Palacz, Michal Mariusz (Master thesis, 2012)Ejector systems have been applied for many decades in refrigeration systems and this is still a very active field of research. More recently, ejector technology has been applied to transcritical refrigeration systems. ... -
Challenges of effective chilling of Atlantic salmon in refrigerated sea water: field tests
Tolstorebrov, Ignat; Widell, Kristina Norne; Nordtvedt, Tom Ståle; Eikevik, Trygve Magne (Chapter, 2019)This papers is summing up main challenges which occur at large-scale industrial slaughter houses when chilling Atlantic salmon by refrigerated sea water (RSW). The study includes strategies of efficient chilling in 100 m ... -
Characteristics of evaporation of propane (R290) in compact smooth and microfinned tubes
Allymehr, Ehsan; Pardiñas, Ángel Á.; Eikevik, Trygve Magne; Hafner, Armin (Peer reviewed; Journal article, 2020)Evaporation of flowing propane and the effect of enhanced geometry on heat transfer coefficient and pressure drop is experimentally investigated. One smooth tube and two microfinned tubes with an outer diameter of 5 mm ... -
Climate Independent Snow Production and Solutions for Snow Storage - Klimauavhengig snøproduksjon og ulike løsninger for lagring av snø
Heimdal, Marianne (Master thesis, 2018)This thesis studies different alternatives for snow storage in Granåsen (Trondheim). It is planned to improve the arena in Granåsen, which will give possibilities for future winter games and cross-country skiing facilities ... -
CO2-kjølesystemer for data-/telesentraler
Solemdal, Yngve (Master thesis, 2013)Kjøling av datasentraler står for en økende del av verdens elektrisitetsforbruk. I senere år har fokus dreid seg fra utelukkende å være på driftssikkerhet til å også omfatte energieffektivitet. Mer energiintensivt IT-utstyr, ... -
Cold storage for an adsorption-based refrigeration cycle in Africa
Danielsen, Adrian Peder Malum; Jørs, Andreas Grodås (Master thesis, 2023)Å utnytte solenergi er en sentral strategi for å elektrifisere landlige regioner i Afrika, der solcellepaneler vanligvis er det foretrukne valget for strømforsyning. Denne masteroppgaven undersøker imidlertid potensialet ... -
Cold storage for an adsorption-based refrigeration cycle in Africa
Danielsen, Adrian Peder Malum; Jørs, Andreas Grodås (Master thesis, 2023)Å utnytte solenergi er en sentral strategi for å elektrifisere landlige regioner i Afrika, der solcellepaneler vanligvis er det foretrukne valget for strømforsyning. Denne masteroppgaven undersøker imidlertid potensialet ... -
Comparative analysis of evaporation of isobutane (R600a) and propylene (R1270) in compact smooth and microfinned tubes
Allymehr, Ehsan; Pardiñas, Angel A.; Eikevik, Trygve Magne; Hafner, Armin (Peer reviewed; Journal article, 2021)Data base for evaporation of flowing isobutane and propylene in compact internally enhanced surfaces is extended by experimental tests in two microfinned tubes and a smooth tube. The outer diameter for all of the test tubes ... -
Comparison of single and parallel ejector operation in transcritical R744 cycle.
Foit, Wojciech (Master thesis, 2012)Ejector systems have been a field of research for many years. One of the latest topics are transcritical cycles with R744 refrigerant. The main reason of installing ejectors in that type of systems is the recovering of the ... -
Compressors for ammonia-water hybrid absorption-compression heat pumps
Ahrens, Marcel Ulrich; Hafner, Armin; Eikevik, Trygve Magne (Chapter, 2019)In this paper, investigations on the development of industrial high temperature heat pumps are carried out based on the analysis of the current available compressors. The compressor used for the ammonia compression is a ... -
Conceptual study of a portable cooling system based on renewable energy for use on fruits and vegetables
Espedalen, Benjamin Hammer (Master thesis, 2019)Verdens befolkning er i stadig økning hvor flere og flere mennesker tar seg ut av fattigdom hver eneste dag, som et resultat følger det at behovet for nok næringsrik mat øker. India er et land der både innbyggertallet og ... -
Cooling Solutions for the First Norwegian Series of Permanent Magnet Machines
Arnesen, Arild Nøst (Master thesis, 2014)SmartMotor AS has an ambition of developing a new series of permanent magnet (PM) machines. The aim is to offer one range of machines for marine applications such as propulsion, anchor and winches, and a separate range ... -
Cooling System for High Energy Efficient Electric Motors: Kjølesystemer for energieffektive elektriske motorer
Clad, Lars (Master thesis, 2013)The development of an efficient cooling system for an axial magnetic flux machine was the subject of the presented master thesis. Throughout the study, an experimental model was designed which offers the possibility to ... -
Cost Efficient Industrial Heat Recovery through Heat Pumps
Aarnes, Morten Akre (Master thesis, 2016)Industrial waste heat often contains large amounts of useable energy that cannot be utilized in its current form, and has to be used together with a waste heating technology to become useful. With increasing energy prices ...