Blar i NTNU Open på forfatter "Gullo, Paride"
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A review on recent technological advancements in multi-ejector concept
Gullo, Paride; Hafner, Armin; Banasiak, Krzysztof; Minetto, Silvia (Chapter, 2018)As a consequence of the coming into force of the EU F-Gas Regulation 517/2014, enormous technological developments have been experienced on the part of transcritical R744 supermarket refrigeration systems. These have led ... -
Advanced Thermodynamic Analysis of a Transcritical R744 Booster Refrigerating Unit with Dedicated Mechanical Subcooling
Gullo, Paride (Journal article; Peer reviewed, 2018)In this work the thermodynamic performance of a transcritical R744 booster supermarket refrigeration system equipped with R290 dedicated mechanical subcooling (DMS) was exhaustively investigated with the aid of the advanced ... -
Comparative study of various supermarket refrigerating systems in European climate context
Gullo, Paride; Purohit, Nilesh; Dasgupta, Mani Sankar; Hafner, Armin; Banasiak, Krzysztof (Chapter, 2018)Due to the enormous carbon footprint of food retail stores the interest in natural working fluids, such as propane (R290) and CO2 (R744), has recently intensified in the commercial refrigeration sector. In this theoretical ... -
Crossing CO2 equator with the aid of multi-ejector concept: A comprehensive energy and environmental comparative study
Gullo, Paride; Tsamos, Konstantinos; Hafner, Armin; Banasiak, Krzysztof; Ge, Yunting; Tassou, Savvas A. (Journal article; Peer reviewed, 2018)The ever-stricter regulations put into effect worldwide to significantly decrease the considerable carbon footprint of commercial refrigeration sector have forced the transition to eco-friendlier working fluids (e.g. CO2, ... -
A detailed review on CO2 two-phase ejector flow modeling
Ringstad, Knut Emil; Allouche, Yosr; Gullo, Paride; Ervik, Åsmund; Banasiak, Krzysztof; Hafner, Armin (Peer reviewed; Journal article, 2020)Ejector-equipped vapor-compression systems for refrigeration and cooling, relying solely on (R744) as a natural working fluid, are perceived to be an eco-friendly and highly efficient solution for many applications. However, ... -
A detailed review on CO2 two-phase ejector flow modeling
Ringstad, Knut Emil; Allouche, Yosr; Gullo, Paride; Ervik, Åsmund; Banasiak, Krzysztof; Hafner, Armin (Peer reviewed; Journal article, 2020)Ejector-equipped vapor-compression systems for refrigeration and cooling, relying solely on (R744) as a natural working fluid, are perceived to be an eco-friendly and highly efficient solution for many applications. However, ... -
Efficient R744 technology for supermarket heating, cooling and refrigeration - a theoretical assessment of energy advantages in various Spanish cities
Gullo, Paride; Hafner, Armin; Banasiak, Krzysztof (Chapter, 2018)Various appealing expedients aimed at enhancing the energy efficiency of transcritical CO2 (R744) supermarket refrigerating systems have been recently developed. The concurrent adoption of these could lead such hydrofluorocarbon ... -
Energetic and environmental performance evaluation of AR744 multi-ejector enhanced parallel compression system in high ambient temperature locations
Gullo, Paride; Purohit, Nilesh; Dasgupta, Mani Sankar; Hafner, Armin (Chapter, 2018)Hydrofluorocarbons (HFCs) are widely used today in supermarket refrigeration and air conditioning applications, despite their environmentally deleterious nature. However, the EU F-Gas Regulation 517/2014 ambitiously aims ... -
Energy use and retrofitting potential of heat pumps in cold climate hotels
Smitt, Silje Marie; Tolstorebrov, Ignat; Gullo, Paride; Pardiñas, Ángel Á.; Hafner, Armin (Peer reviewed; Journal article, 2021)Tourism, and thereby hotels, play a crucial role in the European economy. The hotel sector features high energy consumption, which greatly contributes to the global warming effect. Thus, there is a need to investigate ... -
Multi-Ejector Concept: A Comprehensive Review on its Latest Technological Developments
Gullo, Paride; Hafner, Armin; Banasiak, Krzysztof; Minetto, Silvia; Kriezi, Ekaterini E. (Journal article; Peer reviewed, 2019)The adoption of the EU F-Gas Regulation 517/2014 and the resulting development of the multi-ejector concept have led carbon dioxide to take center stage as the sole refrigerant (R744) in several applications. Therefore, a ... -
Thermodynamic Performance Investigation of Commercial R744 Booster Refrigeration Plants Based on Advanced Exergy Analysis
Gullo, Paride; Hafner, Armin; Banasiak, Krzysztof (Journal article; Peer reviewed, 2019)After the recent renewed interest in CO2 as the refrigerant (R744) for the food retail industry, many researchers have focused on the performance enhancement of the basic transcritical R744 supermarket refrigeration unit ... -
Transcritical R744 refrigeration systems for supermarket applications: Current status and future perspectives
Gullo, Paride; Hafner, Armin; Banasiak, Krzysztof (Journal article; Peer reviewed, 2018)Visible signs of climate change call for urgent actions on food retail industry, since such a sector is characterized by an abundant carbon footprint. Being CO2 (or R744) recognised across the world as the most promising ...