Workshop at ICR 2019 Montréal 2019-08-31T18:37:53+00:00

Heat Pump Water Heaters, a challenging future

On Tuesday 27th August a successful workshop with over eighty participants was held at the IIR Conference the ICR 2019 in the Palais de Congrès de Montréal. Over 80 participants participated where after the presentations by a number of invited experts and experts from the Annex 46, a lively discussion was held.


  1. Introduction to the IEA TCP Heat Pumping Technologies and the Annex 46. Mr. Onno Kleefkens MSc., Phetradico, Netherlands. An overview was given of the IEA Technical Collaboration Program on Heat Pumping Technologies and the Annex 46. The HPT Annex 46 focuses on increasing the knowledge on hot water heat pumps, as these are becoming with the lower energy use for space heating the dominant energy factor in domestic buildings. Scenarios have been developed.
  2. History and latest trends of domestic hot water heat pump technologies. Prof. Kiyoshi Saito, Waseda University, Japan. The latest technology developments for domestic hot water heat pump systems were discussed, focusing on a wide range from component technologies, to refrigerants, installer plug & play solutions to end user water savings technologies
  3. Evaluation of different heat pump systems for sanitary hot water production using natural refrigerants. Prof. Emilio Navarro Peris, Universitat Politècnica de València, Spain. The work presented, performs a comparison between different heat pump alternatives based on natural refrigerants to produce domestic hot water. A set of three different configurations using R290 and R744 have been compared showing the potential of each one. A short abstract gives more details.
  4. Easy LCCP analysis for Domestic Hot Water Heat Pumps. Mr. Pavel Makhnatch MSc., KTH Royal Institute of Technology, Sweden. This work introduces the methodology of simplifying the comparative LCCP analysis of a heat pump system based on example of a fictitious domestic hot water heat pump system using different refrigerants. A short abstract gives more details.
  5. The roadmap of refrigerants for heat pump water heating- Challenges and Opportunities. Dr. Kashif Nawaz, Oak Ridge National Laboratory. Refrigerants have been investigated in a number of worldwide research efforts. However on domestic hot water heat pumps still a lot has to be done. In the presentation ideas were discussed how to continue.
  6. Photovoltaics for Sanitary Hot Water Production. Prof. Pedro G. Vicente Quiles, Universidad Miguel Hernández, Spain. The opportunities of the combination of Solar Photovoltaisc in combination with Domestic Hot Water Heat Pumps have been shown as presented in a number of recent publications. As already shown in the Workshop at the 12th IEA Heat Pump Conference in Rotterdam this combination has a great potential.
  7. Advanced vapour compression and/or sorption heat pumps with minimum compact thermal storage for DHW. Prof. Neil Hewitt, Ulster University, UK. A clear relation was shown in the need of small systems which can deliver sufficient hot water at demand. Instantaneous heat pump water heaters without large storage systems is the challenge to be delivered.


As the IEA Annex 46 is officially ending by September 2019 the feeling of the participants is that the work is not ended at this moment. A clear challenge is that collaboration at international level is needed as the potential in many worldwide market is great, but the realisation still small.