| CO2-heat pump water heater: characteristics, system design and experimental results P Nekså, H Rekstad, GR Zakeri, PA Schiefloe International Journal of refrigeration 21 (3), 172-179, 1998 | 558 | 1998 |
| CO2 heat pump systems P Nekså International Journal of refrigeration 25 (4), 421-427, 2002 | 450 | 2002 |
| 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 Y Ishimoto, M Voldsund, P Nekså, S Roussanaly, D Berstad, ... International journal of hydrogen energy 45 (58), 32865-32883, 2020 | 334 | 2020 |
| Low-temperature CO2 capture technologies–Applications and potential D Berstad, R Anantharaman, P Nekså International Journal of Refrigeration 36 (5), 1403-1416, 2013 | 227 | 2013 |
| Review of vapour compression heat pumps for high temperature heating using natural working fluids O Bamigbetan, TM Eikevik, P Nekså, M Bantle International journal of refrigeration 80, 197-211, 2017 | 222 | 2017 |
| Reducing the exergy destruction in the cryogenic heat exchangers of hydrogen liquefaction processes Ø Wilhelmsen, D Berstad, A Aasen, P Nekså, G Skaugen International Journal of Hydrogen Energy 43 (10), 5033-5047, 2018 | 162 | 2018 |
| Large-scale hydrogen liquefier utilising mixed-refrigerant pre-cooling DO Berstad, JH Stang, P Nekså International journal of hydrogen energy 35 (10), 4512-4523, 2010 | 158 | 2010 |
| Low-temperature CO2 removal from natural gas D Berstad, P Nekså, R Anantharaman Energy Procedia 26, 41-48, 2012 | 134 | 2012 |
| Liquid hydrogen as prospective energy carrier: A brief review and discussion of underlying assumptions applied in value chain analysis D Berstad, S Gardarsdottir, S Roussanaly, M Voldsund, Y Ishimoto, ... Renewable and Sustainable Energy Reviews 154, 111772, 2022 | 128 | 2022 |
| Modelling and simulation of CO2 (carbon dioxide) bottoming cycles for offshore oil and gas installations at design and off-design conditions HT Walnum, P Nekså, LO Nord, T Andresen Energy 59, 513-520, 2013 | 120 | 2013 |
| Comparison criteria for large-scale hydrogen liquefaction processes DO Berstad, JH Stang, P Nekså International journal of hydrogen energy 34 (3), 1560-1568, 2009 | 118 | 2009 |
| Theoretical analysis of suitable fluids for high temperature heat pumps up to 125 C heat delivery O Bamigbetan, TM Eikevik, P Nekså, M Bantle, C Schlemminger International Journal of Refrigeration 92, 185-195, 2018 | 105 | 2018 |
| Experimental investigation of a prototype R-600 compressor for high temperature heat pump O Bamigbetan, TM Eikevik, P Nekså, M Bantle, C Schlemminger Energy 169, 730-738, 2019 | 86 | 2019 |
| The development of a hydrocarbon high temperature heat pump for waste heat recovery O Bamigbetan, TM Eikevik, P Nekså, M Bantle, C Schlemminger Energy 173, 1141-1153, 2019 | 73 | 2019 |
| Investigation of dry ice blockage in an ultra-low temperature cascade refrigeration system using CO2 as a working fluid H Yamaguchi, XD Niu, K Sekimoto, P Nekså International Journal of refrigeration 34 (2), 466-475, 2011 | 69 | 2011 |
| Low carbon power generation for offshore oil and gas production M Voldsund, A Reyes-Lúa, C Fu, M Ditaranto, P Nekså, MJ Mazzetti, ... Energy Conversion and Management: X 17, 100347, 2023 | 66 | 2023 |
| Development and analysis of a natural gas reliquefaction plant for small gas carriers P Nekså, E Brendeng, M Drescher, B Norberg Journal of Natural Gas Science and Engineering 2 (2-3), 143-149, 2010 | 63 | 2010 |
| Efficient liquefaction of hydrogen: results of the IDEALHY project K Stolzenburg, D Berstad, L Decker, A Elliott, C Haberstroh, C Hatto, ... Proceedings of the XXth Energie—Symposium, Stralsund, Germany, 7-9, 2013 | 60 | 2013 |
| Energy-efficiency technologies for reduction of offshore CO2 emissions MJ Mazzetti, P Nekså, HT Walnum, AKT Hemmingsen Oil and gas facilities 3 (01), 89-96, 2014 | 54 | 2014 |
| On the design of an efficient hydrogen liquefaction process J Stang, P Neksa, E Brendeng | 49 | 2006 |
