A5032043085- Refrigeration and Air Conditioning Technologies
- Advanced Thermodynamic Systems and Engines
- Thermodynamic and Exergetic Analyses of Power and Cooling Systems
- Phase Equilibria and Thermodynamics
- Building Energy and Comfort Optimization
- Heat Transfer and Optimization
- Advanced Sensor Technologies Research
- Energy Efficiency and Management
- Adsorption and Cooling Systems
- Process Optimization and Integration
- Heat Transfer Mechanisms
- Advanced Combustion Engine Technologies
- Phase Change Materials Research
- Geothermal Energy Systems and Applications
- Nanofluid Flow and Heat Transfer
- Engineering Diagnostics and Reliability
- Hydraulic and Pneumatic Systems
- Aerodynamics and Fluid Dynamics Research
- Ranque-Hilsch vortex tube
- Fluid Dynamics and Turbulent Flows
- Catalysis and Oxidation Reactions
- Green IT and Sustainability
- Solar Thermal and Photovoltaic Systems
- Vehicle emissions and performance
- Urban Heat Island Mitigation
University of Southern Denmark
2021-2025
Technical University of Denmark
2019-2023
Norwegian University of Science and Technology
2017-2019
University of Udine
2015-2017
Noticeable technological advances in transcritical R744 (or "CO2 only" or pure CO2) supermarket refrigeration systems have recently occurred. Consequently, the trend towards such technologies has been greatly intensifying, leading these solutions to take root European commercial sector. In this theoretical study, performance of present state-of-the-art CO2 plants was extensively investigated for an average size food retail located various climate contexts. The results revealed that, compared...
Carbon dioxide (CO2 or R744) and HFO-1234ze(E) are two promising alternatives to the currently employed high-GWP working fluids for food retail applications. In this paper, indirect refrigeration systems using respectively R1234ze(E) CO2 as primary secondary fluid, a R744 booster configuration with parallel compression solution R290 dedicated mechanical sub-cooling theoretically compared R404A multiplex direct expansion refrigerating system (baseline). The latter serves both LT MT load. All...
Building cooling and heating, solar-powered energy production, recovery, other energy-consuming industries have all seen an increase in the use of cold/hot latent thermal storage (LH-TES). Through LH-TES that uses phase-change materials (PCMs) as a medium helps to close supply demand gap raises possibility savings. However, stability, thermal, physical, chemical properties PCM play major role how effectively it can be used. In recent years, adding gelling thickening agents (GTAs) has gained...
The subcooling potential of a novel R717-based waste heat-driven multi-ejector chiller (HEC) integrated with an R744 refrigeration system was evaluated for use in supermarkets. performance compared coupled to R718- and R600a-based HECs, equipped parallel compression (PC), standard booster (CB) various warm hot climatic locations. Integration the HEC found improve coefficient by 3.7% at 27 °C 12.1% 45 R718, 1.6% 7.6% system. energy-saving R717 (6.2% 9.4%) also be higher than that R718 (0.7%...
Small-scale vapour-compression systems for refrigeration, air conditioning, and heat pump (RACHP) applications guarantee several essential human needs. The global energy environmental policies have compelled these solutions to take a new sustainable growth path, i.e., the adoption of low warming potential (GWP) refrigerants. working fluids with GWP below 150 as substitutions in across six main been exhaustively reviewed, focus is given aspects system performance, impacts, operating...
In this work the thermodynamic performance of a transcritical R744 booster supermarket refrigeration system equipped with R290 dedicated mechanical subcooling (DMS) was exhaustively investigated aid advanced exergy analysis. The outcomes obtained suggested that improvement priority needs to be addressed manufacturing more efficient high-stage (HS) compressors, followed by enhancement gas cooler/condenser (GC), medium-temperature (MT) evaporators, compressor, and low-temperature (LT)...
After the recent renewed interest in CO2 as refrigerant (R744) for food retail industry, many researchers have focused on performance enhancement of basic transcritical R744 supermarket refrigeration unit warm climates. This task is generally fulfilled with aid energy-based methods. However, implementation an advanced exergy analysis mandatory to properly evaluate best strategies needing be implemented achieve greatest thermodynamic improvements. Such assessment, fact, widely recognized most...
Tourism, and thereby hotels, play a crucial role in the European economy. The hotel sector features high energy consumption, which greatly contributes to global warming effect. Thus, there is need investigate environmentally friendly technologies that have potential reduce usage within this sector. Information regarding current status of consumption hotels essential. Therefore, study 140 Norway Sweden presented paper identify successful sustainable measures related emissions. use, available...