Conference: Air Source Heat Pumps in Retrofitting Applications

• You will get detailed information on using air to air systems for heating, cooling and heat recovery as well as actual developments in the areas of improving the refrigeration cycle, comfort and acoustic
• You will be served with information concerning the technical state of the art of air to water heat pumps and challenges of the energy labelling
• You will gain knowledge about the optimized design of a compressor for natural refrigerant for air source heat pumps
• You will be informed on the requirements for using natural refrigerants in heat pump applications
• You will get detailed information on frameworks in the field of acoustics and acoustic characterization for air source heat pumps

Chairman: Dr. Thomas Fleckl (Thematic Coordinator Renewable Heating & Cooling, AIT Austrian Institute of Technology GmbH, Vienna, Austria)

09:30 Check-In/welcome coffee

10:00 Opening of the conference

• Information and details of the conference
• GreenHP - air source heat pump in retrofitting applications

Dr. Thomas Fleckl (Thematic Coordinator Renewable Heating & Cooling, AIT Austrian Institute of Technology GmbH, Vienna, Austria)

Air source heat pump applications

10:15 VRV systems for big applications for heating, cooling and heat recovery

• types of VRV systems
• application possibilities
• comfort & acoustics, sound emissions
• future trends and possibilities
• best practice

Mario Kleidosty (technical coordinator Austria, Daikin Airconditioning Central Europe HandelsGmbH, Brunn am Gebirge, Austria)

10:40 Discussion

10:50 Experiences with an Air-to-Air Heat Pump installed in a Castle

• Burg Rabenstein
• Non-permanent Heating
• Simulation & Initial Measurement Results

Univ.-Prof. Dr. René Rieberer (Institute of Thermal Engineering, Graz University of Technology, Austria)

11:15 Discussion

11:25 Uhr Cold Climate and Retrofit applications for Air-to-Air Heat Pumps

• R&D trends and results in IEA-HPP Annex 41
• Improvements of the refrigeration cycle
• A/A heat pumps with small duct, high velocity air distribution system for retrofitting existing buildings

Van D. Baxter, MEng (Distinguished R&D Staff, Oak Ridge National Laboratory, Buildling Technologies Research & Integration Center, Oak Ridge, USA)

11:50 Discussion

12:00 Lunch

13:00 Air source heat pumps on the test rig and in standards

• Test results at 55°C
• Energy labelling of space heating heat pumps
• Seasonal efficiency in dependency on the bivalent point

Christian Köfinger, MSc Engineer (AIT Austrian Institute of Technology GmbH, Vienna, Austria)

13:25 Discussion

13:35 Optimized compressor for air source heat pumps in retrofitting applications

• Natural refrigerant
• Oil reduction
• EVI
• Optimal design point
• Condensing unit application

Dr. Bachir Bella (Director Specialty projects Engineering, Emerson Climate Technologies GmbH, Aachen, Germany)

14:00 Discussion

14:10 Natural refrigerants in heat pump applications

• Current situation and perspective (F-gas regulation)
• Requirements for using natural refrigerants (Standards, guidelines, experience, ...)
• Refrigerant charge minimization
• On-going research

Univ.-Prof. Dr. José Miguel Corberán Salvador (Professor of the Applied Thermodynamics Department of the UPV, Universitat Politecnica de Valencia, Valencia, Spain)

14:35 Discussion

14:45 Coffee break

Acoustics

15:15 Framework for air source heat pumps in the field of acoustics

• Sound design
• guidelines
• requirements
• trends and future development

Andreas Doppler, MBA (Senior Consultant, Technisches Büro für Umweltschutz, Linz, Austria)

15:40 Discussion

15:50 Acoustic Characterisation of Air-to-Water Heat pumps - Measurement Equipment and Analysis Techniques

• available measurement techniques & concepts
• frequency and spatial resolved acoustic signal analysis
• acoustic source localisation using an acoustic camera
• psychoacoustics and its implication in technical applications
• lab demonstration of acoustic signal processing during icing of the evaporator

Dr. Christoph Reichl (Scientist, AIT Austrian Institute of Technology GmbH, Vienna, Austria)

16:15 Discussion

16:25 Lab-tour: heat pump testing facilities and sound measurement equipment

17:00 End of the conference

AIT Austrian Institute of Technology
Giefinggasse 2
A-1210 Vienna