Blar i NTNU Open på forfatter "Tolstorebrov, Ignat"
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Low Temperature Plate Freezing of Fish on boats using R744 as Refrigerant and Cold Thermal Energy Storage
Verpe, Espen Halvorsen (Master thesis, 2018)The introduction of low temperature R744 freezing systems enables lower evaporating temperatures and faster freezing times, however, also a lower system efficiency (COP). This thesis will investigate how low temperature ... -
Modeling and simulation of oil-free liquid-injected screw compressors using ammonia-water mixture as working fluid
Ahrens, Marcel Ulrich; Tønsberg, Even Kristian; Tolstorebrov, Ignat; Hafner, Armin; Eikevik, Trygve Magne (Chapter, 2022)This study investigates the compression process of an oil-free screw compressor with liquid injection for an absorption-compression heat pump (ACHP) with an ammonia-water mixture as working fluid. In recent years, several ... -
Modelling Approach for a Liquid-Injected Ammonia-Water Screw Compressor
Ahrens, Marcel Ulrich; Tønsberg, Even Kristian; Tolstorebrov, Ignat; Hafner, Armin; Eikevik, Trygve Magne (Chapter, 2021)The present work focuses on a modelling approach for a liquid-injected ammonia-water screw compressor for combined absorption-compression heat pumps (CACHP) at high-temperature operation. The CACHP system combines the ... -
Modelling of Crystallization During Freeze-Concentration of Hydrolysates
Khan, Muhammad Umar; Tolstorebrov, Ignat; Widell, Kristina Norne; Hafner, Armin; Nordtvedt, Tom Ståle (Chapter, 2022)Dewatering of fish protein hydrolysates is energy intensive process. The freeze concentration is one of the solutions, which provide high quality of concentrate, energy efficiency and sustainability of the hydrolysate ... -
Numerical and experimental study of vacuum freezing process
Chrobak, Jakub (Master thesis, 2023)Vakuumfrysing er en alternativ fordampningsmetode for matfrysing. Vanninnholdet i produktet fordamper på grunn av nærvakuumtrykket i kammeret. Frigjøring av latent varmeenergi fra faseendringen forårsaker reduksjon av ... -
Numerical investigation of an ammonia-water absorption-compression high-temperature heat pump for hot water and steam production in food processing
Ren, Shuai; Ahrens, Marcel Ulrich; Hamid, Khalid; Tolstorebrov, Ignat; Hafner, Armin; Eikevik, Trygve Magne; Widell, Kristina Marianne Norne (Chapter, 2023)To achieve climate neutrality in the food sector, there is an urgent need for eco-friendly steam boilers. The absorption-compression heat pumps (ACHP) using an ammonia-water mixture as working fluid can provide a high heat ... -
Numerical investigation of an oil-free liquid-injected screw compressor with ammonia-water as refrigerant for high temperature heat pump applications
Ahrens, Marcel Ulrich; Tolstorebrov, Ignat; Tønsberg, Even Kristian; Hafner, Armin; Wang, Ruzhu; Eikevik, Trygve Magne (Peer reviewed; Journal article, 2022)This study investigates a numerical model of an oil-free twin screw compressor with an ammonia-water mixture as refrigerant and liquid injection. The compressor was identified as the main constraint to increase the heat ... -
Opportunities for the state-of-the-art production of LIB Electrodes – A review
Bryntesen, Silje Nornes; Strømman, Anders Hammer; Tolstorebrov, Ignat; Shearing, Paul Robert; Lamb, Jacob Joseph; Burheim, Odne Stokke (Peer reviewed; Journal article, 2021)A sustainable shift from internal combustion engine (ICE) vehicles to electric vehicles (EVs) is essential to achieve a considerable reduction in emissions. The production of Li-ion batteries (LIBs) used in EVs is an ... -
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 design and operation of chilling tank for Atlantic salmon
Widell, Kristina Norne; Nordtvedt, Tom Ståle; Tolstorebrov, Ignat; Fossen, Inge (Chapter, 2019)Farmed salmon is a large export product from Norway. After the salmon is stunned and killed, it is often transported to large tanks for bleeding, chilling and buffering before gutting and further processing. The temperature ... -
Performance evaluation of two-stage mechanical vapour recompression with turbo-compressors
Bantle, Michael; Schlemminger, Christian; Tolstorebrov, Ignat; Ahrens, Marcel; Evenmo, Kjetil (Chapter, 2018)Mechanical Vapour Recompression (MVR) is an open loop heat pump system using water (R718) as working fluid, one of the most abundant and safest refrigerant on the planet. The concept can significantly reduce the energy ... -
Physicochemical and functional properties of rainbow trout (Oncorhynchus mykiss) hydrolysate
Kvangarsnes, Kristine; Dauksas, Egidijus; Tolstorebrov, Ignat; Rustad, Turid; Bartolomei, Martina; Xu, Ruoxian; Lammi, Carmen; Cropotova, Janna (Peer reviewed; Journal article, 2023)Due to the continuous growth of the world population, there is an urgent need to find sustainable sources of high-quality protein. Fish side streams rich in essential nutrients and accounting for 60–70% of the whole fish, ... -
Potential for Saccharina latissima Flour as a Functional Ingredient in the Baking Sector
Oprea, Oana Bianca; Tolstorebrov, Ignat; Claussen, Ingrid Camilla; Sannan, Sigurd; Apostol, Livia; Mosoiu, Claudia; Gaceu, Liviu (Journal article; Peer reviewed, 2023)The healthy “superfood” sector is currently quickly developing in Europe, and grocery stores are increasingly stocking macroalgae food supplements. Due to its high amount of protein, fiber, and minerals, numerous studies ... -
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 ... -
Production Strategies for Sustainable LIB Cathodes with Enhanced Rate Capability and Energy Density
Bryntesen, Silje Nornes (Doctoral theses at NTNU;2023:109, Doctoral thesis, 2023) -
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 ... -
Rest Raw Material from Atlantic Salmon and Norwegian Chicken - Effects of Thermal Treatment and Different Drying and Storage Methods on Quality and Stability
Jeyakumaran, Ramja (Master thesis, 2019)I følge FAO (2018) har forbruket av marine produkter på jorda nådd over 120 millioner tonn de siste ti årene. Det økende forbruket har ført til økende mengde marine produkter som ikke kan bli brukt til menneskelig konsum. ... -
Simulation of a carbon dioxide (R-744) refrigeration system for fishing vessel
Semaev, Pavel; Söylemez, Engin; Tolstorebrov, Ignat; Hafner, Armin; Widell, Kristina Norne; Lund, Thomas; Øy, Jostein; Urke, Jan Petter (Chapter, 2021)The paper describes architecture of a prototype industrial CO2 trans-critical system for production of refrigerated sea water (RSW) for either fishing vessels or land-based process plants. The refrigeration system was ... -
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 ... -
Snow Production Equipment at Ambient Temperatures Above Zero Degrees Celsius
Dieseth, Jon-Brede Rykkje (Master thesis, 2016)In the perspective of increasing global temperatures, the periods with natural snow is shorter and in areas, the snow in the winter is disappearing. Therefore, it is important to produce snow at temperatures above 0°C to ...