Browsing SINTEF Open by Author "Nekså, Petter"
Now showing items 1-20 of 38
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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 ... -
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 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) -
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) -
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 ...