Browsing SINTEF Open by Author "Nekså, Petter"
Now showing items 21-40 of 57
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Experimental investigation of CO2 systems for Indian supermarkets with parallel configuration of multiejectors (INDEE)
Banasiak, Krzysztof; Singh, Simarpreet; Hafner, Armin; Maiya, Prakash; Nekså, Petter; Pardiñas, Ángel Á. (Actes du ... Congres international du froid;2019, Chapter; Peer reviewed, 2019) -
Experimental investigation of dry ice cyclone separator for ultra‐low temperature energy storage using carbon dioxide
Yamasaki, Haruhiko; Kizilkan, Ônder; Yamaguchi, Hiroshi; Kamimura, Takeshi; Hattori, Kazuhiro; Nekså, Petter (Peer reviewed; Journal article, 2020)CO2 cascade heat pump system has been developed to realize an ultra‐low temperature below the triple point of 0.518 MPa and − 56.6°C or less by flowing dry ice solid‐gas state of CO2 in a refrigeration system. Solid CO2 ... -
Experimental investigation of the effect of solid-gas two-phase flow in CO2 cascade refrigeration system
Yamasaki, Haruhiko; Yamaguchi, Hiroshi; Kizilkan, Ônder; Kamimura, Takeshi; Hattori, Kazuhiro; Nekså, Petter (Peer reviewed; Journal article, 2020)The dry ice sublimation process of CO2 is a unique technique in which temperature ranges below the triple point of −56 °C can be achieved in a CO2 refrigeration system. However, during the evaporation process of the actual ... -
Experimental investigation of the performance of a hydrocarbon heat pump for high temperature industrial heating
Bamigbetan, Opeyemi Olayinka; Eikevik, Trygve Magne; Nekså, Petter; Bantle, Michael; Schlemminger, Christian (Science et technique du froid;2018-3, Chapter; Peer reviewed, 2018) -
Experimental study on a CO2-solid-gas-flow-based ultra-low temperature cascade refrigeration system
Niu, Xiao-Dong; Yamaguchi, Hiroshi; Iwamoto, Yuhiro; Nekså, Petter (Journal article; Peer reviewed, 2011) -
Gradient Based Design Optimization of a Radial Inflow Turbine
Hagen, Brede; Cavo, Matteo; Andresen, Trond; Nekså, Petter (Science et technique du froid;2020-1, Chapter; Peer reviewed, 2020)The expander is one of the key components of an ORC as the cycle efficiency strongly depends on the expander efficiency. This paper presents a method for design optimization of a radial inflow turbine (RIT) using a mean-line ... -
High temperature industrial heat pumps utilising natural working fluids
Nekså, Petter; Bantle, Michael; Schlemminger, Christian; Bamigbetan, Opeyemi Olayinka (Actes du ... Congres international du froid;ICR2019, Chapter; Peer reviewed, 2019)There is a large demand for heat typically in the temperature range 100-200⁰C in different industries. This is today often covered by fossil fuel burning or direct use of electricity. Heat pumps has to a lesser extent been ... -
High-purity H2 production with CO2 capture based on coal gasification
Jordal, Kristin; Anantharaman, Rahul; Peters, Thijs; Berstad, David Olsson; Morud, John Christian; Nekså, Petter; Bredesen, Rune (Journal article; Peer reviewed, 2015)A novel hybrid concept is proposed, combining Pd-alloy membrane and low temperature separation technology, to produce pure H2 from gasified coal and capture the main part of the generated CO2. 75% of the H2 produced from ... -
High-temperature heat pumps based on natural working fluids to produce district heating from industrial waste heat.
Kauko, Hanne; Nordtvedt, Stein Rune; Nekså, Petter; Bantle, Michael (Science et technique du froid;2017-2, Chapter; Peer reviewed, 2017)The amount of industrial waste heat produced in Europe annually corresponds to the total annual heating demand in buildings. Common barriers for utilizing this heat are the lack of required infrastructure, i.e. a district ... -
Hydrogen re-liquefaction Process for Boil-off Gas Handling on a Large-scale Liquid Hydrogen Carrier
Kim, Donghoi; Trædal, Stian; Berstad, David Olsson; Nekså, Petter; Yum, Kevin Koosup (Science et technique du froid;, Chapter; Peer reviewed, 2023)With the recent focus on hydrogen, seaborne shipping is considered an option for the large-scale transport of liquid hydrogen (LH2). For efficient shipping, boil-off gas (BOG) from the cargo tanks needs to be optimally ... -
Integrated CO2 solutions for supermarkets
Hafner, Armin; Nekså, Petter (Journal article; Peer reviewed, 2018) -
Integrated Low-temperature CO2 Capture from IGCC Power Plant by Partial Condensation and Separation of Syngas
Berstad, David Olsson; Anantharaman, Rahul; Nekså, Petter (Peer reviewed; Journal article, 2013)As an alternative to baseline technology a low-temperature syngas separation process has been proposed for pre-combustion CO2 capture from coal-derived syngas for an IGCC plant. Through systematic process synthesis – ... -
Investigation on scale formation in aluminium industry by means of a cold-finger
Clos, Daniel Perez; Nekså, Petter; Johnsen, Sverre Gullikstad; Aune, Ragnhild Elizabeth (Journal article; Peer reviewed, 2019)A cylindrical fouling probe or “cold-finger” has been used to investigate fouling from aluminium production off-gas. The probe was located upstream from the off-gas cleaning system. Surface deposits have been collected for ... -
Large-scale production and transport of hydrogen from Norway to Europe and Japan: Value chain analysis and comparison of liquid hydrogen and ammonia as energy carriers
Ishimoto, Yuki; Voldsund, Mari; Nekså, Petter; Roussanaly, Simon; Berstad, David Olsson; Gardarsdottir, Stefania Osk (Peer reviewed; Journal article, 2020)Low-carbon hydrogen is considered as one of the key measures to decarbonise continental Europe and Japan. Northern Norway has abundant renewable energy and natural gas resources which can be converted to low-carbon hydrogen. ... -
Liquid hydrogen as prospective energy carrier: A brief review and discussion of underlying assumptions applied in value chain analysis
Berstad, David Olsson; Gardarsdottir, Stefania Osk; Roussanaly, Simon; Voldsund, Mari; Ishimoto, Yuki; Nekså, Petter (Journal article; Peer reviewed, 2021)In the literature, different energy carriers are proposed in future long-distance hydrogen value chains. Hydrogen can be stored and transported in different forms, e.g. as compressed dense-phase hydrogen, liquefied hydrogen ... -
Low carbon power generation for offshore oil and gas production
Voldsund, Mari; Reyes Lua, Adriana; Fu, Chao; Ditaranto, Mario; Nekså, Petter; Mazzetti, Marit Jagtoyen; Brekke, Olaf; Bindingsbø, Arne Ulrik; Grainger, David; Pettersen, Jostein (Peer reviewed; Journal article, 2023)Emission reductions in power generation for offshore oil and gas activities are key in order to reach climate targets in regions with this industry. This study presents a review of both established and immature low carbon ... -
Low Temperature CO2 separation - Benchmarking and recommendations for further work
Jordal, Kristin; Berstad, David Olsson; Roussanaly, Simon Nathanael; Anantharaman, Rahul; Skaugen, Geir; Nekså, Petter (SINTEF Energi. Rapport;, Research report, 2013) -
Low-temperature CCS from an IGCC Power Plant and Comparison with Physical Solvents
Berstad, David Olsson; Anantharaman, Rahul; Nekså, Petter (Peer reviewed; Journal article, 2013)The application of low-temperature CO2 capture has been investigated for an integrated gasification combined cycle (IGCC). The performance of low-temperature capture has been compared with Selexol capture for two different ... -
Low-temperature CO2 Removal from Natural Gas
Berstad, David Olsson; Nekså, Petter; Anantharaman, Rahul (Journal article; Peer reviewed, 2012)As an alternative to chemical and physical solvents, membrane technologies and PSA, process principles for CO2 removal from natural gas by low-temperature distillation are presented. A low-temperature process reducing the ... -
Medium scale distribution chains for hydrogen
Nekså, Petter; Saeed, Muhammad Zahid; Trædal, Stian; Snustad, Ingrid; Koshelkov, I.; Jacobsen, L.D. (Conference object, 2023)