Blar i NTNU Open på forfatter "Álvarez Pardiñas, Ángel"
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Attaining a higher flexibility degree in CO2 compressor racks
Álvarez Pardiñas, Ángel; Contiero, Luca; Hafner, Armin; Banasiak, Krzysztof; Larsen, Lars F.S. (Chapter, 2020)CO2 compressor racks have shown their suitability for commercial and industrial refrigeration systems at any location and climate. Even if some references state that CO2 units can compete in capital cost with any other ... -
Development of a methodology for the determination of the life cycle climate performance (LCCP) of supermarket refrigeration systems and other integrated system with a reduced number of experiments
Durand, Aymeric (Master thesis, 2018)The SuperSmart Rack is an innovative prototype of a refrigeration system running with CO2 as only refrigerant with the aim to reduce the environmental impacts. It is discussed in the present report how to assess these ... -
Evaluation of different concepts for the utilization of the cooling potential from the regasification of natural gas
Øverby, Tone (Master thesis, 2018)The increasing interest in energy efficient solutions, and working towards a more sustainable future, give rise to the importance of utilization and thus reduction of the current wastage of excess energy today. As the total ... -
Evaporative cooling system with natural refrigerant at -50 ℃ and 100 m underground
Barroca, Pierre; Hafner, Armin; Álvarez Pardiñas, Ángel; Verlaat, B; Zwalinski, L; Hulek, Wojciech; Petagna, P.; Hanf, Pierre; Battistin, M (Chapter, 2020)The cooling systems of the future tracking detectors of both ATLAS and CMS experiments at the Large Hadron Collider (LHC) at CERN will be entirely based on CO2 refrigeration technology. The system is a booster refrigeration ... -
Experimental study of Isobutane (R600a) evaporation in microfinned and smooth tubes
Allymehr, Ehsan; Roux, Marie Isabelle; Álvarez Pardiñas, Ángel; Eikevik, Trygve Magne; Hafner, Armin (Chapter, 2020)Heat transfer coefficient and pressure drop of Isobutane (R600a) in an internally enhanced tube has been experimentally measured and compared to a smooth tube with the same outer diameter of 5 mm. The effects of mass flux ... -
Testing of tri-partite CO2 gas cooler prototype for domestic hot water and space heating
Tolstorebrov, Ignat; Zendehboudi, Alireza; Banasiak, Krzysztof; Köster, Lukas; Álvarez Pardiñas, Ángel; Hafner, Armin (Chapter, 2020)The aim of this study was to test a tri-partite gas cooler for CO2 heat pumps (5-13 kW). The proposed heat exchanger allowed the simultaneous and separate production of space heating and domestic hot water with an integrated ...