Blar i NTNU Open på forfatter "Widell, Kristina Norne"
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Advanced R744 solution for supermarkets, hotel chillers and maritime applications in India
Singh, Simarpreet; Selvnes, Håkon; Pardiñas, Ángel Á.; Reddy, Srinevas K; Gupta, P; Vaishak, S; Arun, B.S.; Widell, Kristina Norne; Elarga, Hagar; Hafner, Armin (Chapter, 2022)R744 integrated systems can meet oscillating heating and cooling demands efficiently and become a game changer in countries such as India. The present work aims to develop and present R744 system designs and disseminate ... -
Application Of Refrigeration Technologies For Energy Efficient Production Of Fish Protein Hydrolysates
Sherman, Prem Kumar; Tolstorebrov, Ignat; Widell, Kristina Norne; Hafner, Armin; Nordtvedt, Tom Ståle (Chapter, 2022)Fish protein hydrolysate (FPH) is one of the most efficient and sustainable way to recover the valuable nutrients from fish remaining materials and has a widespread application. However, the production of FPH demands ... -
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 ... -
CO2 refrigeration system design and optimization for LNG driven cruise ships
Saeed, Muhammad Zahid; Hafner, Armin; Gabrielii, Cecilia H; Tolstorebrov, Ignat; Widell, Kristina Norne (Chapter, 2021)The cruise industry is in the evolution of eco-friendly technologies due to strict environmental regulations. Liquified natural gas (LNG) is an alternative marine fuel. Compared to conventional diesel fuels, LNG offers 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 ... -
Cryogenic cold utilization and system integration possibilities for LNG-driven fishing vessels
Saeed, Muhammad Zahid; Widell, Kristina Norne; Hafner, Armin; Nordtvedt, Tom Ståle; Svendsen, Eirik Starheim (Chapter, 2020)Liquified natural gas (LNG) fuelled vessels are increasing in the fishing industry due to its reduced environmental footprint as compared to vessels using heavy hydrocarbon fuels. Cryogenic tanks are used to store LNG on ... -
Design and simulation of a small cold storage with NH3 refrigeration system and CO2 as indirect cooling loop for storing of fresh fruits and vegetables
Bredesen, Tom André (Master thesis, 2019)Målet med denne Masteroppgaven er å studere indiske kuldekjeder for frukt og grønnsaker, for å foreslå hvordan disse kan forbedres med et lite kuldelager som benytter seg av et NH3 kjølesystem med CO2 i ei naturlig ... -
Energy efficiency of freezing tunnels: towards an optimal operation of compressors and air fans
Widell, Kristina Norne (Doktoravhandlinger ved NTNU, 1503-8181; 2012:1, Doctoral thesis, 2012)Fish is one of Norway’s main exports, and can be shipped fresh, frozen or dried. This thesis examines the freezing of fish in batch tunnels and ways to increase the energy efficiency of this process. A fish freezing plant ... -
Energy efficient and climate friendly cooling, freezing and heating onboard fishing vessels
Saeed, Muhammad Zahid (Master thesis, 2020)Abstract: Liquefied natural gas (LNG) fueled vessels are increasing in the fishing industry due to its reduced environmental footprint as compared to vessels applying heavy hydrocarbon fuels. Cryogenic tanks are used to ... -
Energy efficient and climate friendly cooling, freezing and heating onboard fishing vessels
Saeed, Muhammad Zahid (Master thesis, 2020)Andelen sjøfartøy som drives av flytende naturgass (LNG) i fiskeindustrien øker på grunn av deres reduserte miljøavtrykk sammenlignet med fartøy som utnytter tunge hydrokarbonbrensler. På skip oppbevares LNG i kryogene ... -
Energy flow analysis of a poultry processing plant
Svendsen, Eirik Starheim; Hafner, Armin; Selvnes, Håkon; Widell, Kristina Norne (Chapter, 2020)More efficient utilization of primary energy resources can be achieved with thermal energy storages and it is a measure to limit global warming. The thermal energy demands of industrial food-processing plants are non-uniform ... -
Energy flow analysis of an industrial ammonia refrigeration system and potential for a cold thermal energy storage
Widell, Kristina Norne; Svendsen, Eirik Starheim; Selvnes, Håkon; Sevault, Alexis; Hafner, Armin; Nordtvedt, Tom Ståle (Chapter, 2022)There is an increasing effort to reduce energy demand at food processing plants, mainly to reduce the total carbon footprint. The energy demand of a fish processing plant (using ammonia as refrigerant) has been evaluated ... -
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 ... -
Integrated CO2 refrigeration and heat pump systems for dairies
Selvnes, Håkon; Jenssen, Sigmund; Sevault, Alexis; Widell, Kristina Norne; Ahrens, Marcel Ulrich; Ren, Shuai; Hafner, Armin (Chapter, 2022)Production facilities in the food industry are large consumers of electricity and thermal energy due to energyintensive processes such as steam production, cleaning, sanitising, refrigeration and drying. Furthermore, there ... -
Integrated thermal storage and heat recovery of the CO2 refrigeration system for fishing vessels
Saeed, Muhammad Zahid; Widell, Kristina Norne; Hafner, Armin; Nordtvedt, Tom Ståle; Svendsen, Eirik Starheim (Chapter, 2020)The natural refrigerant CO2 is gaining an attraction for fishing vessels due to its compact units, negligible global warming potential (GWP), and non-toxic behaviour. Chilling and freezing onboard are energy-consuming ... -
Mapping of cold chains in Nepal
Dhakal, Pranab Raj; Widell, Kristina Norne; Hafner, Armin (Chapter, 2018)Many developing countries are still not well equipped with cold chain facilities. In this paper, a survey has been conducted to map the current cold chains of inNepal. Most of the cold chain practices in Nepal are found ... -
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 ... -
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 ... -
Overview of the development and status of carbon dioxide (R-744) refrigeration systems onboard fishing vessels
Söylemez, Engin; Widell, Kristina Norne; Gabrielii, Cecilia H; Ladam, Yves; Lund, Thomas; Hafner, Armin (Peer reviewed; Journal article, 2022)Globally, most fishing vessels still use the ozone-depleting and climate-harmful R-22 in their freezing and refrigerated seawater (RSW) systems. However, in some regions, the natural refrigerant ammonia is the preferred ... -
Performance evaluation of high-temperature heat pump systems for hot water and steam generation in food processing
Ren, Shuai; Ahrens, Marcel Ulrich; Hafner, Armin; Widell, Kristina Norne (Chapter, 2022)A large amount of fossil fuels is consumed for hot water and steam generation in food processes such as smoking, scalding, drying, pasteurization, sterilization, cleaning, and cooking, which currently rises both economic- ...