Il convegno internazionale
CO2 and Ammonia Refrigeration Technologies
organizzato da International Institute of Refrigeration (IIR)
si svolgerà dal 13 al 15 maggio 2021 a Ohrid in Macedonia.

E’ la nona edizione di questo importante convegno internazionale.

Programma finale

September 16, 2021 (Thursday)
09:00 Opening ceremony
Keynote lectures,
09:20 Andy Pearson – Star Refrigeration, UK (keynote)
Optimising energy use in refrigeration systems
09:50 Stefan Jensen – Scantec Refrigeration, Australia (keynote)
The future of low charge NH3 refrigerating plants
10:20 L. Kuijpers, N. Kochova, A. Vonsild, Netherlands, R. Macedonia, Denmark
Steps towards the low and “net-zero” emissions future
10:40 Coffee break
Ammonia refrigeration, :
11:00 Michael Elstrom – HB Products A/S, Denmark
Low Charge Ammonia systems designed as Direct Expansion
11:15 Manuel Munoz-Alonso, L. Dixon, C. Seeton, J. Karnaz, – Shrieve Products International Ltd, UK
The role of miscible PAG lubricants in ammonia refrigeration systems reduction and compactness
11:30 P. Wagner, M. Verdnik, R. Rieberer, T. Demmerer, M. Blaser – Graz University of Technology, Austria
High temperature ammonia heat pump as an add on to an existing chiller
11:45 E. Svendsen, K. Widell, T. Nordtvedt, S. Jafarzadeh, C. Gabrielii, SINTEF, Norway
Energy consumption of ammonia refrigeration system on board fishing vessel
12:00 Franz Sperl – Guentner GmbH, Germany
Behaviour of a NH3-evaporator in the transition from superheated to flooded operation
12:15 Questions and answers
12:40 Lunch break
Heat pumps, :
13:40 Alexander Pachai, J. Normann, C. Arpagaus, A. Hafner – JCI-Sabroe, Denmark
Screening of future-proof working fluids for industrial high-temperature heat pumps up to 250 °C (Part 1)
13:55 Alexander Pachai, J. Normann, C. Arpagaus, A. Hafner – JCI-Sabroe, Denmark
Screening of future-proof working fluids for industrial high-temperature heat pumps up to 250 °C (Part 2)
14:10 Kenneth Hoffmann, Jan Gerritsen – GEA Refrigeration, Netherlands
Is chemical HFO refrigerants a solution for heat pumps?
14:25 Marcel Ahrens, H. Selvnes, Leon Henke, M. Bantle, A. Hafner – NTNU, Norway
Investigation on heat recovery strategies from low temperature food processing plants: Energy analysis and system comparison
14:40 Yantong Li, N. Nord, I. Rekstad, S. Skanoy, L. Sorensen – NTNU, Norway
Effect of electronic expansion valve opening on discharge pressure of a water-source CO2 heat pump: An experimental study
14:55 Questions and answers
15:20 Coffee break
CO2 refrigeration,
15:40 Javier Vega, Cristian Cuevas, Remi Dickes, Vincent Lemort, -University of Liege, Belgium
Application of a semi-empirical modelling approach to a two-stage rotary CO2 compressor
15:55 Pavel Semaev, E. Söylemez, I. Tolstorebrov, A. Hafner, K. Widell, Th. Lund, J. Øy, J. Urke, NTNU, Norway
Simulation of a carbon dioxide (R-744) refrigeration system for fishing vessel
16:10 Steffen Feja, C. Hanzelmann, S. Zuber – ILK Dresden, Germany
Thermodynamic properties (Daniel Plot) of lubricant – supercritical CO2 mixtures at high temperatures
16:25 S. Singh, A. Pardinas, A. Hafner, C. Schlemminger, K. Banasiak, Norway, NTNU
R744 Refrigeration Solution for Small Supermarkets
16:40 Paolo Artuso, S. Minetto, A. Rossetti, G. Tosato, S. Marinetti – CTI-NRC, Italy
Two years of data monitoring of all-CO2 retail stores within the MultiPACK project
16:55 Questions and answers
17:00 Closing