International online conference - The Future of Air Conditioning - Programme day 2
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The second day of the conference took at closer look at future possibilities and ongoing cases, where natural refigerants are used for different applications. Here, you can view the programme for the last day of the conference, and if you want to dive into the details have a look at the presentations of the day.
Welcome and introduction 
Held by Esben Vendelbo Foged, Team Manager, Centre for Refrigeration and Heat Pump Technology, Danish Technological Institute
Future possibilities of NatRefs in HVAC
Moderator: Ilana Koegelenberg, Market Development Manager, shecco
Fionnuala Walravens, Senior Campaigner, Environmental Investigation Agency (EIA):
“They [the International Energy Association] project that by 2050, our global stock of air conditioners will triple by 2.6 billion units. So, to put that in another way, that's basically 10 new air conditioners being sold every single second for the next 30 years.”
Menno van der Hoff, Chief Executive Director, TripleAqua | Future Necessity of NatRefs in HVAC:
"The largest source of CO2 emissions worldwide is around us. Buildings. Heating, ventilation, cooling. More than any other factor, buildings is number one. So, to solve the CO2 problem, we should start with the low hanging fruit; buildings."
Technical session: Large Scale 1
Moderator: Jan Dusek, Chief Operating Officer & Head of APAC, shecco
Giacomo Pisano, Technical Sales Manger, Dorin | Designing a 200kW Chiller: Efficiency Comparison Between HFCs and Natural Refrigerants in European Climate Zones:
"Natural refrigerant [chillers] are able to perform in a similar way to HFCs, HFOs and their blends throughout every European climate".
Sergio Girotto, President, Enex & Giacomo Tossatto, Researcher, ITC-CNR (National Research Council – Construction Technology Institute) | Improvements on: Water and Brine Chiller for Air Conditioning and Process Cooling:
"We have more than 50 CO2 chillers installed in Europe".
Technical session: Large Scale 2
Moderator: Christian Heerup, Business Manager, Refrigeration, Danish Technological Institute
Samir Hamed, Research & Development Manager, Petra (United Nations Industrial Development Organization (UNIDO) MLF project) | Design, Manufacturing and Performance Testing of Large Capacity R290 Rooftop Package Air Conditioning Units:
“Comparing R290 and R407C, we notice the R290 refrigerant is higher on the cooling capacity [in rooftop units] by 2-4 %, and by 4-9.5% on the energy efficiency ratio, along ambient variations”.
Neal Lawrence, Senior Research Engineer, Creative Thermal Solutions (CTS) | Successful Conversion of Railway Air-Conditioning Unit to Transcritial R744 Technology:
“Very significant improvements in capacity (14 %) and unit COP (16 %) show great potential for R744 unit to replace HFC units in railway air conditioning”.
Technical session: Small Scale 1
Moderator: Ilana Koegelenberg, Market Development Manager, shecco
Marcin Lazar, Co-Owner, HKS Lazer | Air/Water Heat Pump HT 10/20 Method of Reducing R-290 Refrigerant Charge and COP Efficiency Increasing Methods:
“We are working with this refrigerant [R290] as we believe it is the future refrigerant, because of it’s ecological parameters”.
Rossana Boccia, PhD Student, Technical University of Denmark | Heat Recovery Ventilation Heat Pump Water Heaters and Propane: Development & Challenges:
“The building sector has the largest potential for significant reduction of GHG emissions”.
Technical session: Small Scale 2
Moderator: Christian Heerup, Business Manager, Refrigeration, Danish Technological Institute
Stefan Elbel, Chief Engineer, Creative Thermal Solutions (CTS) | Energy Savings in Commercial Air Conditioning by Use of a Low-Charge Ammonia Chiller:
“The efficiency of [ammonia] indirect or cascade systems, often using brazed plate evaporators, can be improved by overfeeding the evaporator”.
Dr. Paride Gullo, Marie Skłodowska-Curie Postdoctoral Researcher, Technocal University of Denmark (project with Danfoss) | A Novel Capacity Control Mechanism for Two-phase Ejectors in Transcritical R744 Air Conditioners: