Blar i Institutt for energi og prosessteknikk på forfatter "Pardiñas, Ángel Á."
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Novel integrated CO2 vapour compression racks for supermarkets. Thermodynamic analysis of possible system configurations and influence of operational conditions
Pardiñas, Ángel Á.; Hafner, Armin; Banasiak, Krzysztof (Journal article; Peer reviewed, 2017)An increasing number of supermarket chains are opting for the utilisation of centralised carbon dioxide refrigeration systems. However, the need to improve their efficiency in order to make them economically and environmentally ... -
A novel R744 multi-temperature cycle for refrigerated transport applications with low-temperature ejector: Experimental ejector characterization and thermodynamic cycle assessment
Fabris, Francesco; Pardiñas, Ángel Á.; Marinetti, Sergio; Rossetti, Antonio; Hafner, Armin; Minetto, Silvia (Peer reviewed; Journal article, 2023)A novel vapor-compression system concept employing carbon dioxide as the refrigerant is proposed to serve the needs of a typical medium-size refrigerated truck used for multi-temperature (MT and LT) goods delivery. The ... -
Numerical Study of Hydrocarbon Charge Reduction Methods in HVAC Heat Exchangers
Allymehr, Ehsan; Skaugen, Geir; Will, Torsten; Pardiñas, Ángel Á.; Eikevik, Trygve Magne; Hafner, Armin; Schnabel, Lena (Peer reviewed; Journal article, 2021)Required refrigerant charge in heat pump systems with propane is analyzed. Two systems are compared: The first a direct heat pump, with fin-and-tube heat exchangers, and the second an indirect system, with plate heat ... -
Performance improvements of supermarket R744 systems by pivoting compressor arrangements
Contiero, Luca; Fabris, F; Pardiñas, Ángel Á.; Hafner, Armin (Chapter, 2022)The adoption of the EU F-Gas regulation 517/2014 and the development of the Multi Ejector concept have led CO2 to take center stage as one of the preferred solutions in several applications, at the expense of synthetic ... -
Performance test methodology for the LCCP determination of supermarket and other integrated systems
Pardiñas, Ángel Á.; Hafner, Armin; Banasiak, Krzysztof; Larsen, L. (Chapter, 2017)A new flexible supermarket R-744 refrigeration unit has been implemented in the laboratories at NTNU/SINTEF. The unit is fully equipped with real display cabinets for both medium and low temperature, as well as seven large ... -
R744 Refrigeration Solution for Small Supermarkets
Singh, Simarpreet; Pardiñas, Ángel Á.; Hafner, Armin; Schlemminger, Christian; Banasiak, Krzysztof (Chapter, 2021)Application based technology solution is nowadays preferred to achieve the performance of the cooling system configuration at its best. Therefore, benchmarking is an essential criterion which would add value to the optimum ... -
State-of-the-Art for the use of Phase-Change Materials in Tanks Coupled with Heat Pumps
Pardiñas, Ángel Á.; Alonso, Maria Justo; Diz, Rubén; Kvalsvik, Karoline Husevåg; Fernandez-Seara, Jose (Journal article; Peer reviewed, 2017)With the goal of increasing heat storage in the same accumulation volumes, phase-change materials are considered. There are different substances with different phase-change temperatures that can be used for storing heating ... -
Strategy for the control of two groups of ejectors operating in parallel in Integrated R744 refrigeration systems
Pardiñas, Ángel Á.; Hafner, Armin; Banasiak, Krzysztof; Kvalsvik, Karoline Husevåg; Larsen, Lars (Chapter, 2018)Commercial refrigeration systems using CO2 as refrigerant are becoming common in the South of Europe, due to technological solutions such as the use of ejectors or parallel compression that allow their efficiency to be ... -
Two-stage evaporator for R744 heat pumps using greywater as heat source
Pardiñas, Ángel Á.; Kauko, Hanne Laura Pauliina; Hazarika, Mihir Mouchum; Selvnes, Håkon; Banasiak, Krzysztof; Hafner, Armin (Peer reviewed; Journal article, 2023)Heat pumps are pinpointed as a key technology in decarbonizing buildings' heat supply, which is currently dominated by fossil-fuel based systems. To minimize the environmental impact of heat pumps over their lifetime, ...