Blar i SINTEF Open på forfatter "Ahrens, Marcel Ulrich"
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Experimental evaluation of a water based high temperature heat pump with novel high pressure lift turbo compressors
Verpe, Espen Halvorsen; Schlemminger, Christian; Bantle, Michael; Ahrens, Marcel Ulrich (Science et technique du froid;, Chapter, 2020)This paper evaluates a water based (R718) high temperature heat pump with novel high-pressure lift turbo compressors. The first stage turbo compressor is designed for steam compression and the second stage is designed for ... -
Höchtemperatur-Wärmepumpen mit natürlichen Kältemitteln : Fallstudien zur HTWP-Integration für industrielle Kälte- und Prozessheisswasserherstellung
Schlemminger, Christian; Ahrens, Marcel Ulrich; Foslie, Sverre Stefanussen; Moen, Ole Marius; Bantle, Michael; Hafner, Armin; Jenssen, Sigmund (Chapter; Peer reviewed, 2021) -
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 (Science et technique du froid;, Chapter; Peer reviewed, 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 high temperature heat pumps and thermal storage tanks for combined heating and cooling in the industry
Ahrens, Marcel Ulrich; Foslie, Sverre Stefanussen; Moen, Ole Marius; Bantle, Michael; Eikevik, Trygve Magne (Peer reviewed; Journal article, 2021)This study investigates the integrated heat pump system of a green-field dairy located in Bergen, Norway. The purpose of the study is to determine the energy consumption and system performance. The dairy features a novel ... -
Investigation on heat recovery strategies from low temperature food processing plants: Energy analysis and system comparison
Ahrens, Marcel Ulrich; Selvnes, Håkon; Henke, Leon Hendrik; Bantle, Michael; Hafner, Armin (Chapter; Peer reviewed, 2021)Industrial food processing plants often have significant thermal requirements at both low and high temperatures. These plants can produce a variety of products including frozen, chilled and grilled/steamed foodstuff, ... -
Kennfeld und Leistungsanalyse einer zweistufigen Turbokompressor-Brüdenverdichtung
Bantle, Michael; Schlemminger, Christian; Ahrens, Marcel Ulrich; Evenmo, Kjetil (Chapter; Peer reviewed, 2018)Die mechanische Brüdenverdichtung ist eine Spezialform der Wärmepumpentechnologie. Überschüssiger Dampf aus industriellen Prozessen (R718) wird verdichtet und die Kondensationswärme genutzt um den Prozess zu hei-zen. ... -
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 (Science et technique du froid;, Chapter; Peer reviewed, 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 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; Peer reviewed, 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- ... -
Turbo-compressors for R-718: Experimental evaluation of a two-stage steam compression cycle
Bantle, Michael; Schlemminger, Christian; Gabrielii, Cecilia H; Ahrens, Marcel Ulrich (Actes du ... Congres international du froid;ICR2019, Chapter; Peer reviewed, 2019)Water (R-718) is a safe and energy-efficient refrigerant. Mechanical vapour recompression (MVR), an open-loop heat pump using R718, can significantly reduce the energy consumption for steam-heated processes like drying, ...