Browsing NTNU Open by Author "Eikevik, Trygve Magne"
Now showing items 101-120 of 146
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Optimalisering av en 45 bars ammoniakk varmepumpe
Korff, Kristian (Master thesis, 2012)I løpet av 2005-2006 ble det installert en ny kombinert varmepumpe/kjølemaskin i Kongsberg Teknologipark. Den kombinerte varmepumpen/kjølemaskinen er et totrinns ammoniakkanlegg som har som formål å levere prosesskjøling ... -
Optimalisering av energibruk i frysetunneler - modellering
Engebakken, Jon Arve Urseth (Master thesis, 2008)Denne masteroppgaven har sett på hva som innvirker på en frysetunnels energibruk og hvordan frysetunneler fram til i dag er blitt modellert og hva som har vært hovedhensikten med modelleringen. Hovedtyngden av oppgaven ... -
Optimalisering av energibruk og kvalitet innen klippfisktørking
Alvestad, Ståle (Master thesis, 2007)SammendragFor tørking av klippfisk, ble det i litteraturstudiet funnet at fiskens tørkehastighet påvirkes av temperatur, relativ luftfuktighet og lufthastighet. Dannelse av tørkeskorpe kommer som et resultat av at det ... -
Optimalisering av lita ammoniakkvarmepumpe med akkumuleringstank for romoppvarming og tappevannsberedning
Bjørneklett, Jonas (Master thesis, 2013)I Norge vert det i dag selt ca 80 000 luft-til-luft varmepumper kvart år. Marknaden for varmepumper som leverer varme til tappevatn og romoppvarming er betydeleg lågare. Typiske varmepumper for denne type oppvarming nyttar ... -
Optimization and Process Improvements of a High Temperature Heat Pump Using Butane as Working Fluid
Olafsen, Martin (Master thesis, 2018)With the ability to recover waste heat from industrial processes there is a huge potential to reduce the ever increasing requirement for energy. Globally industry consumes over half of the energy used, and large part of ... -
Optimized and Cost Efficient Industrial Heat Pumps based on Low Grade Waste Heat
Lund, Robert Hoel (Master thesis, 2016)The industrial sector is a large consumer of energy. Globally, this sector accounts for over half of the energy used. As anthropogenic emissions increase, and the consequences of these emissions become more evident, the ... -
Optimizing a Small Ammonia Heat Pump with Accumulator Tank for Space and Hot Tap Water Heating
Lalovs, Arturs (Master thesis, 2015)The heat pump market offers a wide variety of different residential heat pumps where most of them utilize refrigerant R-410A which has high global warming potential. Considering the fact that global policy ... -
Optimizing the Compression/Absorption Heat Pump System at High Temperatures
Bergland, Martin Glosli (Master thesis, 2015)Large amounts of low grade waste heat from industrial processes are not utilized, due to lack of heat integration equipment. Industrial processes tend to have specifications at high temperature lifts, that not are suited ... -
Performance analysis of an R744 ground source heat pump system with air-cooled and water-cooled gas coolers
Hu, Haitao; Eikevik, Trygve Magne; Nekså, Petter; Hafner, Armin; Ding, Guoliang; Huang, Qingnan; Ye, Jingjing (Journal article; Peer reviewed, 2016)In order to decrease the earth's energy imbalance degree, a R744 ground source heat pump system (GSHPS) with air-cooled and water-cooled gas coolers was designed, and the performances of this system were analyzed numerically. ... -
Performance analysis of high temperature heat pumps and thermal energy storages for a dairy
Ahrens, Marcel Ulrich; Brækken, August; Foslie, Sverre Stefanussen; Moen, Ole Marius; Lovas, Kim Andre; Bantle, Michael; Hafner, Armin; Eikevik, Trygve Magne (Chapter, 2022)This paper analyses the performance of the integrated energy system of an existing dairy in Bergen, Norway. The investigated dairy has an innovative solution for the thermal process supply by using only heat pumps and ... -
Performance analysis of solar assisted R744 ground source heat pump in different climates
Ye, Jingjing (Master thesis, 2014)Som verden står overfor alvorlige miljø- og energikrise, står bergvarmepumpe ut som en effektiv air condition-systemet som kan levere både kjøling og oppvarming belastning for bygningen. Tatt i betraktning den miljømessige ... -
Power Production from Low Temperature Heat Sources
Pfaff, Michael (Master thesis, 2010)SummaryThis Master Thesis is a conclusion on work done as part of the Resource Optimizationand recovery in the Materials industry project (Roma). This project is involved in thedevelopment of a new technology for power ... -
Preliminary experimental investigation on a multi-stage cryogenic heat pipe heat exchanger
Mann, Jakob Aljoscha (Master thesis, 2014)Natural gas is a versatile energy resource. The demand for natural gas is constantly rising and new sources for natural gas are needed. Some of these sources can be very remote and conventional production methods cannot ... -
Production of fish protein hydrolysates step by step: technological aspects, equipment used, major energy costs and methods of their minimizing
Petrova, Inna; Tolstorebrov, Ignat; Eikevik, Trygve Magne (Journal article; Peer reviewed, 2018)Nowadays, there is a growing interest on how to utilize fish materials remaining from the main production and considered as unappropriated for a direct human consumption. There are numbers of possible solutions to recover ... -
Recent Developments in Cooling Systems and Cooling Management for Electric Motors
Konovalov, Dmytro; Tolstorebrov, Ignat; Eikevik, Trygve Magne; Kobalava, Halina; Radchenko, Mykola; Hafner, Armin; Radchenko, Andrii (Peer reviewed; Journal article, 2023)This study provides an overview of new trends in the development of cooling systems for electric motors. It includes a summary of academic research and patents for cooling systems implemented by leading motor manufacturers ... -
Rehabilitering av større oljefyrte varmesystemer for implementering av varmepumpe
Erstad, Magnus Grøttum (Master thesis, 2013)I 2007 rapportertes det om at bruk av fossil energi til oppvarming, og andre formål i bygg (stasjonær forbrenning), stod for en tredjedel av klimagassutslippene i Osloområdet. Dette alene sier noe om markedet for konvertering ... -
Review of Vapour Compression Heat Pumps for High Temperature Heating using Natural Working Fluids
Bamigbetan, Opeyemi Olayinka; Eikevik, Trygve Magne; Nekså, Petter; Bantle, Michael (Journal article; Peer reviewed, 2017)The use of high temperature heat pumps (HTHPs) operating with natural fluids has been shown to be a potential environmentally friendly solution to increase energy efficiency in industrial processes. Industrial processes ... -
RSW Systems with CO2 as Refrigerant: Testing of new system solutions for sea water coolers
Sætrang, Sondre (Master thesis, 2009)In a refrigerated seawater (RSW) system using carbon dioxide (CO2) as the refrigerant, a variable bypass valve was installed in front of a suction gas heat exchanger (SGHX). A simulation tool was developed and utilized to ... -
SIMULATION AND EXPERIMENT RESEARCH ABOUT TWO-PHASE R744 EJECTOR SYSTEM
Zhang, Jinrui (Master thesis, 2016)The work of the thesis is to present a comparison of three different two-phase ejector refrigeration cycles as well as a comparison to an expansion valve refrigeration cycle with two evaporation temperatures. An analytical ... -
Simulation of a freezing system for pelagic fish using open cycle with air as working fluid
Engh, Erling (Master thesis, 2018)As a result of increased focus on the environment, a decision to phase out the use of gases with global warming- and ozone depletion potential, was made. In this master thesis, a state-of-the-art freezing application for ...