Browsing NTNU Open by Author "Tolstorebrov, Ignat"
Now showing items 21-40 of 79
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Development of Concentration Processes to Conserve Rest Raw Materials and Process Water in onshore and off-shore Sectors for Circular Economy
Neakakhtar, Faraz (Master thesis, 2023)Fiskekonsum og ressursutnyttelse har ført til behovet for bærekraftige praksiser på grunn av begrensede fiskeressurser og ønske om bedre utnyttelse av fiskeavfall. Ifølge Caruso (2016) produserer fiskerier over hele verden ... -
Development of the natural working fluid‐based refrigeration system for domestic scale freeze‐dryer
Piechnik, Edyta; Smolka, Jacek; Palacz, Michał; Tolstorebrov, Ignat; Bodys, Jakub; Ciesielska, Agnieszka; Haida, Michal; Halski, Michal; Stebel, Michal; Melka, Bartlomiej; Nowak, Andrzej J.; Eikevik, Trygve Magne; Allymehr, Ehsan; Bantle, Michael; Claussen, Ingrid Camilla; Hoinka, Krzysztof; Milejski, Adam (Chapter, 2022)In this work, the analysis of the refrigeration system designed for the FrostX 10 freeze‐dryer is presented. The main goal of this study was to experimentally investigate the reference R452a freeze‐dryer and prepare ... -
Energy efficient and climate friendly refrigeration systems onboard fishing vessels
Widell, Kristina Marianne Norne; Gabrielii, Cecilia H; Söylemez, Engin; Hazarika, Mihir Mouchum; Hafner, Armin; Khan, Muhammad Umar; Svendsen, Eirik Starheim; Nordtvedt, Tom Ståle; Tolstorebrov, Ignat; Pachai, Alexander C. (Chapter, 2023)Refrigeration systems onboard fishing vessels are necessary to keep the catch at a low temperature and to ensure long shelf life. Most refrigeration systems in the world fishing fleet still have R-22 as a working fluid, ... -
Energy efficient CO2 refrigeration units for fishing vessels
Semaev, Pavel (Master thesis, 2021)Reduksjon i klimagassutslipp fra fiskesektoren er en innsats som krever forskning og utvikling av nyskapende teknologi. Denne masteroppgaven er en del av CoolFish prosjektet, ledet av SINTEF Ocean i samarbeid med flere ... -
Energy use and retrofitting potential of heat pumps in cold climate hotels
Smitt, Silje Marie; Tolstorebrov, Ignat; Gullo, Paride; Pardiñas, Ángel Á.; Hafner, Armin (Peer reviewed; Journal article, 2021)Tourism, and thereby hotels, play a crucial role in the European economy. The hotel sector features high energy consumption, which greatly contributes to the global warming effect. Thus, there is a need to investigate ... -
Energy-efficient high temperature heat pump systems for a spray-dryer
Korstad, Liv Irene (Master thesis, 2019)Industrielle prosesser har en fellesnevner i å kreve store mengder varme, og et fokus på å resirkulere restvarmen dette slipper ut er nødvendig for at næringen skal bli mer bærekraftig. Høytemperatur varmepumper viser et ... -
Evaluating plate freezing of fish using natural refrigerants and comparison with numerical freezing model
Verpe, Espen Halvorsen; Bantle, Michael; Tolstorebrov, Ignat (Chapter, 2018)This paper compares experimentally measured freezing time and predicted numerical freezing time in industrial CO2 plate freezer. The model uses a two-dimensional, heat capacity-temperature, finite difference method with ... -
Experimental Analysis of Drying Kinetics and Quality Aspects of Convection-Dried Cathodes at Laboratory Scale
Bryntesen, Silje Nornes; Kahrom, Armin; Lamb, Jacob Joseph; Tolstorebrov, Ignat; Burheim, Odne Stokke (Journal article; Peer reviewed, 2023) -
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 chilling tank for Atlantic salmon
Widell, Kristina Norne; Nordtvedt, Tom Ståle; Tolstorebrov, Ignat; Fossen, Inge (Chapter, 2018)Farmed salmon is a large export product from Norway. After the salmon is stunned and killed, it istransported to large tanks for bleeding, chilling and buffering before gutting and further processing. The temperature of ... -
Identification of Existing Challenges and Future Trends for the Utilization of Ammonia-Water Absorption–Compression Heat Pumps at High Temperature Operation
Ahrens, Marcel Ulrich; Loth, Maximilian; Tolstorebrov, Ignat; Hafner, Armin; Kabelac, Stephan; Wang, Ruzhu; Eikevik, Trygve Magne (Peer reviewed; Journal article, 2021)Decarbonization of the industrial sector is one of the most important keys to reducing global warming. Energy demands and associated emissions in the industrial sector are continuously increasing. The utilization of high ... -
Influence of the low temperature drying process on optical alternations of organic apple slices
Bantle, Michael; Kopp, Christian Andre; Claussen, Ingrid Camilla; Tolstorebrov, Ignat (Chapter, 2018)Drying conditions for convective driers are often based on empirical approaches in which the final product quality is evaluated post processing. Modern sensor technology and data processing enable second-by-second quality ... -
Integrated CO2 system with HVAC and hot water for hotels: Field measurements and performance evaluation
Smitt, Silje Marie; Hafner, Armin; Tolstorebrov, Ignat (Journal article; Peer reviewed, 2020)This study investigates the performance of an integrated CO2 (R744) heat pump and chiller unit in a Norwegian hotel. The system consists of a single unit for heating, cooling and hot water with an integrated thermal storage. ... -
Integrated R744 unit for hotels: Analysis of field data
Smitt, Silje Marie; Tolstorebrov, Ignat; Hafner, Armin (Chapter, 2020)This study investigates the performance of an integrated R744 HVAC and domestic hot water unit for a Norwegian hotel. The thermal system of the hotel is described and data from the first year of operation are analyzed. The ... -
Integration of heat pumps with natural working fluids into a neighborhood energy system
Rasalingham, Inthujan Raveendrakumar; Rohde, Daniel; Tolstorebrov, Ignat; Eikevik, Trygve Magne (Chapter, 2020)Combining heat pumps (HP) with other renewables, e.g. solar thermal collectors, photovoltaics and energy storage systems can contribute to the growth of future zero emission societies. This article investigates HP integration ... -
Integration of high temperature heat pumps with natural working fluids into a neighborhood energy system
Rasalingham, Inthujan (Master thesis, 2020)Det er flere eksisterende teknologier som er tilgjengelig for anvendelse av høytemperatur varmepumper. Høytemperatursvarmepumper kan brukes til varmtvannsberedning og romoppvarming. De kan også brukes til industrielle ... -
Introducing Lignin as a Binder Material for the Aqueous Production of NMC Cathodes for Li-ion Batteries
Bryntesen, Silje Nornes; Tolstorebrov, Ignat; Svensson, Ann Mari; Shearing, Paul Robert; Lamb, Jacob Joseph; Burheim, Odne Stokke (Peer reviewed; Journal article, 2022)By enabling water-based cathode processing, the energy-intensive N-methyl-2-pyrrolidone (NMP) recovery step can be eliminated, reducing the cost and environmental impact of LIBs. Aqueous processing of high capacity ... -
Investigation of influence of pre-treatment and low-temperature on drying kinetics, sorption properties, shrinkage and color of brown seaweeds (Saccharina Latissima)
Tolstorebrov, Ignat; Eikevik, Trygve Magne; Petrova, Inna; Shokina, Yulia; Bantle, Michael (Chapter, 2018)Drying kinetics of Saccharina latissima (raw and blanched) at low temperatures (10.0, 25.0 and 38.0 °C) was studied. The effective moisture diffusivity coefficient varied due to temperature alterations in the range between ... -
Investigation of integrated CO2 heat pumping systems for hotels in cold climates
Smitt, Silje Marie (Doctoral theses at NTNU;2021:391, Doctoral thesis, 2021) -
Kvalitetsaspekter i pre- og post-rigor oppdrettslaks (Salmo salar) under frysing ved forskjellige temperaturer
Fredriksen, Robert Sandaunet; Nilsen, Emil Støp; Alexandersen, Peter Kristoffer (Bachelor thesis, 2020)Frysing senker vannaktiviteten, reduserer biokjemiske reaksjoner og mikrobiell aktivitet. Samtidig kan frysing føre til strukturelle skader; langsom frysing gir større iskrystaller, mer strukturelle skader og vanntransport ...