Blar i SINTEF Open på forfatter "Nekså, Petter"
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A future energy chain based on liquefied hydrogen
Berstad, David Olsson; Stang, Hans Georg Jacob; Nekså, Petter (Lecture, 2009)In the efforts to curb emissions of greenhouse gases and local pollution hydrogen has the potential of becoming a prominent energy carrier in the future energy supply, for both automotive and stationary use. Today ... -
A steady and quasi-steady state analysis on the CO2 hybrid ground-coupled heat pumping system
Jin, Zhequan; Eikevik, Trygve Magne; Nekså, Petter; Hafner, Armin (Journal article; Peer reviewed, 2017)This article contains the steady and quasi-steady state analysis on a CO2 hybrid ground-coupled heat pumping system for warm climates. The hybrid system uses a combination of ambient air and ground boreholes as a heat sink ... -
Analysis of Natural Gas engine de-loading on LNG fuelled vessels
DiRenzo, Joseph; Nekså, Petter; Kolsaker, Kjell (Journal article; Peer reviewed, 2015) -
Analysis of R744 refrigeration system with liquid ejectors
Singh, Simarpreet; Reddy, Amshith; Parkash, Maiya M.; Banasiak, Krzysztof; Hafner, Armin; Nekså, Petter (Science et technique du froid;2018-3, Chapter; Peer reviewed, 2018) -
Annual energy performance of R744 and R410A heat pumping systems
Jin, Zhequan; Eikevik, Trygve Magne; Nekså, Petter; Hafner, Armin; Wang, Ruzhu (Journal article; Peer reviewed, 2017)This work compares the annual energy performance of heat pumping systems using R744 and R410A as refrigerant. Focus is the annual energy efficiency of R744 hybrid ground-coupled heat pumping system. The hybrid system uses ... -
CO2 Capture from IGCC by Low-Temperature Synthesis Gas Separation
Berstad, David Olsson; Skaugen, Geir; Roussanaly, Simon; Anantharaman, Rahul; Nekså, Petter; Jordal, Aina Benedikte Kristin; Trædal, Stian; Gundersen, Truls (Peer reviewed; Journal article, 2022)Capture conditions for CO2 vary substantially between industrial point sources. Depending on CO2 fraction and pressure level, different capture technologies will be required for cost- and energy-efficient decarbonisation. ... -
Composition and Structure Analysis of Hard Grey Scale (HGS) Formed on Cold Surfaces Exposed to Aluminium Production Off-gas
Perez Clos, Daniel; Zedel, Hannes; Johnsen, Sverre Gullikstad; Nekså, Petter; Aune, Ragnhild Elizabeth (Peer reviewed; Journal article, 2022)Hard grey scale (HGS) is a strongly adhering fouling material forming on solid surfaces impinged by off-gas generated in the pot cells of primary aluminium production plants. Even though associated maintenance costs have ... -
Cryogenic CO2 condensation and membrane separation of syngas for large-scale LH2 production.
Berstad, David Olsson; Wilhelmsen, Øivind; Skjervold, Vidar T.; Nekså, Petter (Science et technique du froid;2017-3, Chapter; Peer reviewed, 2017) -
The development of a hydrocarbon high temperature heat pump for waste heat recovery
Bamigbetan, Opeyemi Olayinka; Eikevik, Trygve Magne; Nekså, Petter; Bantle, Michael; Schlemminger, Christian (Peer reviewed; Journal article, 2019)Waste heat is an abundant resource that if recovered with a heat pump would increase energy efficiency in industrial processes. This will provide improvements in heat utilization and reduce the environmental impact of ... -
Dynamic Analysis of Energy Recovery Utilizing Thermal Storage from Batch-Wise Metal Casting
Andresen, Trond; Lingaas, Simon Johan Nilsen; Hagen, Brede; Nekså, Petter (Science et technique du froid;2020-1, Chapter; Peer reviewed, 2020)The thermal exergy contained in the liquid metal in ferroalloy production makes it an interesting source for energy recovery. The heat released during casting is rarely utilized today. This work investigates the feasibility ... -
Effect of Waste Heat Utilization on the Performance of Low Temperature Rankine Cycle
Shahrooz, Mina; Lundqvist, Per; Nekså, Petter (Science et technique du froid;2020-1, Chapter; Peer reviewed, 2020)Low temperature Rankine cycle is a prominent solution for power generation in Waste Heat Recovery (WHR) application. The performance of this cycle is affected by various parameters including characteristics of the heat ... -
Enabling Efficient Heat Recovery from Aluminium Pot Gas
Clos, Daniel Perez; Andresen, Trond; Nekså, Petter; Johnsen, Sverre Gullikstad; Aune, Ragnhild Elizabeth (The Minerals, Metals & Materials Series;2367-1181, Chapter, 2017) -
Enabling Power Production from Challenging Industrial Off-Gas – Model-Based Investigation of a Novel Heat Recovery Concept
Skjervold, Vidar T.; Skaugen, Geir; Andresen, Trond; Nekså, Petter (Science et technique du froid;2020-1, Chapter; Peer reviewed, 2020)Off-gas from the metal industry is a significant surplus heat source that is often not utilized due to lack of internal and external heat demands. Power production from the surplus heat in the off-gas could be a promising ... -
Energy and Cost Evaluation of A Low-temperature CO2 Capture Unit for IGCC plants
Berstad, David Olsson; Roussanaly, Simon; Skaugen, Geir; Anantharaman, Rahul; Nekså, Petter; Jordal, Kristin (Peer reviewed; Journal article, 2014)The application of CO2 capture by liquefaction has been investigated for an integrated gasification combined cycle (IGCC). Two configurations of the process are developed–one supplying CO2 at conditions suitable for pipeline ... -
Energy efficient multiejector CO2 cooling system for high ambient temperature
Singh, Simarpreet; Maiya, Prakash; Hafner, Armin; Banasiak, Krzysztof; Nekså, Petter (Peer reviewed; Journal article, 2020)Experimental evaluation of a multiejector CO2 cooling system of 33 kW cooling capacity is conducted for an Indian supermarket at high ambient temperature context. The test-rig is designed to depict the actual supermarket ... -
Environment-friendly refrigeration packs for Indian supermarkets: experimental investigation of energy performance of a multiejector-driven R744 integrated compressor rack
Blust, Stefanie; Singh, Simarpreet; Banasiak, Krzysztof; Nekså, Petter (Science et technique du froid;2018-3, Chapter; Peer reviewed, 2018) -
Equation-oriented methods for design optimization and performance analysis of radial inflow turbines
Hagen, Brede; Agromayor, Roberto; Nekså, Petter (Peer reviewed; Journal article, 2021)This paper presents methods for design optimization and performance analysis of radial inflow turbines. Both methods are formulated in an equation-oriented manner and involve a single mathematical problem that is solved ... -
Experimental Evaluation of a Multi-Ejector Trans-critical CO2 System for Supermarkets
Singh, Simarpreet; Hafner, Armin; Banasiak, Krzysztof; Maiya, Prakash; Nekså, Petter (Actes du ... Congres international du froid;ICR2019, Chapter; Peer reviewed, 2019) -
Experimental evaluation of multi-ejector based CO2 cooling system for supermarkets in tropical zones
Singh, Simarpreet; Hafner, Armin; Banasiak, Krzysztof; Maiya, Prakash M.; Nekså, Petter (Purdue e-Pubs;, Chapter, 2018) -
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)