Blar i NTNU Open på forfatter "Sevault, Alexis"
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A CFD analysis for the performance assessment of a novel design of plates-in-tank latent storage unit for freezing applications
Selvnes, Håkon; Allouche, Yosr; Sevault, Alexis; Hafner, Armin (Chapter, 2019)In this paper, the charging and discharging processes of a recently developed cold thermal energy storage (CTES) unit integrated into a poultry processing plant is investigated. A mathematical model of the CTES was created ... -
A novel PCM accumulator for refrigerated display cabinet : design and CFD simulations
Sevault, Alexis; Banasiak, Krzysztof; Bakken, Jørn; Hafner, Armin (Chapter, 2018) -
Active latent heat storage using biowax in a central heating system of a ZEB living lab
Sevault, Alexis; Næss, Erling (Chapter, 2020)The Zero Emission Building (ZEB) lab in Trondheim (Norway), owned by SINTEF and NTNU, provides a structure to develop and test innovative solutions in a living laboratory. An innovative latent heat storage (LHS) unit using ... -
CFD modeling of ice formation and melting in horizontally cooled and heated plates
Selvnes, Håkon; Allouche, Yosr; Sevault, Alexis; Hafner, Armin (Chapter, 2019)This paper investigates the ice formation and melting processes in a novel CTES unit using the commercial CFD software ANSYS Fluent 19. The storage unit is designed to operate as a peak shaving device integrated into the ... -
Cold storage using phase change material in refrigerated display cabinets: experimental investigation
Jokiel, Michael; Sevault, Alexis; Banasiak, Krzysztof; Næss, Erling (Chapter, 2021)Refrigerated display cabinets are the main energy consumers in supermarkets. Cold thermal energy storage (CTES) using phase change materials (PCM) can significantly reduce temperature variations in a display cabinet during ... -
Cold thermal energy storage in solid-liquid transition of carbon dioxide: Investigating the possibility
Mastani Joybari, Mahmood; Selvnes, Håkon; Sevault, Alexis; Hafner, Armin (Chapter, 2022)Industrial freezing is an energy-intensive process which is growing due to the increasing demand. This is exerting stress on electrical grids, especially at peak hours. To tackle this issue, thermal energy storage has ... -
Cold thermal energy storage with low-temperature plate freezing of fish on offshore vessels
Verpe, Espen Halvorsen; Tolstorebrov, Ignat; Sevault, Alexis; Hafner, Armin; Ladam, Yves (Chapter, 2019)This paper presents the results of a numerical and experimental study of freezing time for fish in plate freezers, and the potential for improvement by altering fish block thickness and lowering evaporation temperature. ... -
Design av en PCM-basert varmelagrinsenhet for ZEB Flexible Laboratory
Bøhmer, Fabian (Master thesis, 2019) -
Development of an Intermediate PCM Storage for a Wood Stove
Sæther, Frida (Master thesis, 2022)Norske husholdningers varmebehov blir hovedsakelig dekt av elektrisitet. En mer bære-kraftig energikilde til romoppvarming ville vært og benyttet en moderne vedovn. På grunn av de moderne passivhusenes lave varmebehov vil ... -
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 design and testing of a PCM-based heat storage unit for wood stoves
Mathisen, Henning Hvål (Master thesis, 2019)Bruken av vedovner har lange tradisjoner i Norge, både når det gjelder oppvarming og hygge. Moderne hus er gjerne godt isolerte med lite varmetap og siden vedovner typisk har høy varmeavgivelse, kan dette føre til overoppheting ... -
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 ... -
Investigation of an Innovative Latent Heat Storage Concept in a Stovepipe
Sevault, Alexis; Soibam, Jerol; Haugen, Nils Erland L; Skreiberg, Øyvind (Journal article; Peer reviewed, 2018)Latent heat storage (LHS) is a promising concept for small-scale batch combustion. One example is wood stoves, which rely on a batch combustion process that yields a transient heat production with high peak effect. A ... -
Investigation of the structure of oxy-fuel flames using Raman laser diagnostics
Sevault, Alexis (Doktoravhandlinger ved NTNU, 1503-8181; 2012:166, Doctoral thesis, 2012) -
Investigation of Turbulent Oxy-Fuel Jet Flames Using Raman/Rayleigh Laser Diagnostics
Sevault, Alexis; Barlow, R.S.; Dunn, M.; Ditaranto, Mario (Others, 2011) -
Latent heat storage for centralized heating system in a ZEB living laboratory: integration and design
Sevault, Alexis; Bøhmer, Fabian; Næss, Erling; Wang, Liang (Journal article; Peer reviewed, 2019)The ZEB Lab project, coordinated by SINTEF and NTNU, aims at building a ZEB (Zero Emission Building) in Trondheim (Norway) in 2019, to be used both as office building and living laboratory. An innovative latent heat storage ... -
Latent heat thermal energy storage from wood stoves with high-density polyethylene as phase change material
Larsen, Chris-André Bastin (Master thesis, 2021)Vedovner har i lang tid vært en viktig kilde til oppvarmning i Norden, men den typiske husstand blir bedre og bedre isolert for å redusere behovet for oppvarming. En vedovn vil vanligvis levere mer varme enn det som er ... -
Numerical investigation of a CO2 cooling system connected to Spawn-of-energy-plus thermal zones
Elarga, Hagar; Selvnes, Håkon; Sevault, Alexis; Hafner, Armin (Peer reviewed; Journal article, 2022)Today, only about 25 % of the European building stock is considered energy efficient. Meanwhile, the implementation of CO2 as a refrigerant is considered one of the solutions to improve the overall building’s energy ... -
On the structure of the near field of oxy-fuel jet flames using Raman/Rayleigh laser diagnostics
Sevault, Alexis; Dunn, Matthew; Barlow, Robert S.; Ditaranto, Mario (Journal article; Peer reviewed, 2012)An experimental study on turbulent non-premixed jet flames is presented with focus on CO2-diluted oxy-fuel combustion using a coflow burner. Measurements of local temperatures and concentrations of the main species CO2, ... -
Parametric study of low-temperature thermal energy storage using carbon dioxide as the phase change material in pillow plate heat exchangers
Mastani Joybari, Mahmood; Selvnes, Håkon; Vingelsgård, Erling; Sevault, Alexis; Hafner, Armin (Peer reviewed; Journal article, 2023)Industrial low-temperature freezing applications are often batch processes, requiring a lot of energy, exerting stress on the electrical grid. To relieve this stress, thermal energy storage can be used. However, there is ...