A number of papers have been published by participants in the Annex and authors invited by the Operating Agent.
12th IEA Heat Pump Conference in Rotterdam (Netherlands) 2017
A number of papers have been presented at several of the Conference sessions by participant in the Annex and/or people closely related to the Annex work.
At the Conference a special workshop was held on the combination of Heat Pump Water Heaters and Solar Energy and three session blocks of the Conference (1.7 – 1.9) with 21 papers were on the topic of Heat Pump Water Heaters, which can be downloaded as ZIP-file.

- N.J. Hewitt, M.J. Huang, N.N. Shah, Vapour Compression Heat Pump Technologies for Domestic Hot Water Heating, Centre for Sustainable Technologies, Ulster University, Newtownabbey, BT37 0QB, UK, 12th IEA Heat Pump Conference 2017, Rotterdam, Holland.
- Brian Fronk, Oregon State University, Christopher M. Keinath, Stone Mountain Technologies Inc., Comparison of Primary Energy Consumption of Vapor and Non-Vapor Compression Natural Refrigerant Heat Pumps for Domestic Hot Water Applications, 12th IEA Heat Pump Conference 2017, Rotterdam, Netherlands
- Kevin Ruben Deutz, A. D’Angelo, O. Cauret, R. Rullière, Ph. Haberschill – Performance Evaluation of a Heat Pump Water Heater by means of Thermodynamic Simulation, paper at 12th IEA Heat Pump Conference 2017, May 15-18 2017, Rotterdam – Netherlands
- Jacob van Berkel, Onno Kleefkens, Felix Lacroixc, Solar Heat Pump Standard Assessment Model, 12th IEA Heat Pump Conference 2017, May 15-18 2017, Rotterdam – Netherlands
- Vishaldeep Sharma, Bo Shen, Patrick Geoghegan, Chris Keinath, Michael Garrabrant, European Regional Climate Zone Modeling of a Commercial Gas Absorption Heat Pump Hot Water Heater, Oak Ridge National Laboratory, Stone Mountain Technologies Inc., United States, 12th IEA Heat Pump Conference 2017, Rotterdam, Netherlands
- Prof Stephen Harrison, The Potential and Challenges of Solar Boosted Heat Pumps for Domestic Hot Water Heating, Queens University Canada, 12th IEA Heat Pump Conference 2017, Rotterdam, Netherlands
- Onno Kleefkens, Jacob van Berkel, Charles Geelen, Martijn Bos, Booster Heat Pump, development of test procedure and calculation methodology in order to estimate the energy performance in various domestic applications, Phetradico, ENTRY, Infinitus, ECOON, Netherlands, 12th IEA Heat Pump Conference 2017, May 15-18 2017, Rotterdam, Netherlands
- Chul Woo Roh, Gilbong Lee, Young-Jin Baik, Hyungki Shin, Beomjoon Lee, Junhyun Cho, Korea Institute of Energy Research, Minsung Kim, Chungang University, Thermodynamic performance and economic feasibility of booster heat pumps in low-temperature district heating, Korea South, 12th IEA Heat Pump Conference 2017, Rotterdam, Netherlands
- Martin Kegel, Justin Tamasauskas, Daniel Giguère, Roberto Sunyé, Heat pump water heaters in the Canadian residential market, Natural Resources Canada, Canada, 12th IEA Heat Pump Conference 2017, Rotterdam, Netherlands
13th IEA Heat Pump Conference in Jeju (South Korea) 2021
The latest development and experiences are presented at the ‘hybrid’ conference in on-line sessions. The main bulk of papers, related to HPWH, was on refrigerants, heat exchangers and storage modelling. A number of papers is from participants in the Annex.

- Cordin Arpagaus, et al, Field performance of domestic heat pumps for heating and hot water in Switzerland, NTB University of Applied Sciences and Technology Buchs, 13th IEA Heat Pump Conference 2020, Jeju, Korea
- Takaoki Suzuki, et al, Annual Performance Assessment of Heat Pump Water Heater Technology based on Thermodynamic Properties of Various Refrigerants, Waseda University, 13th IEA Heat Pump Conference 2020, Jeju, Korea
- Kashif Nawaz, Alternate refrigerants for Heat Pump Water Heater Applications Oak Ridge National Laboratory, 13th IEA Heat Pump Conference 2020, Jeju, Korea
- Justin Tamasauskas, et al, A techno economic Comparison of Air Source Heat Pumping Technologies in the Canadian Residential, Canmet ENERGY-Varennes, 13th IEA Heat Pump Conference 2020, Jeju, Korea
Other Conferences
At number of other Conferences papers have been presented by the participants. Conferences organized by Purdue and IIR are typical platforms for presenting heat pumping technologies. But also organisations like EGEC and EHPA have their own venues, not to overlook the Conferences organized by other IEA TCP’s like SHC.
- Deutz, Kevin, Cauret, Odile, Rullière, Romuald, Haberschill, Philippe. (2016). Modeling and Experimental Study of a Heat Pump Water Heater Cycle 16th International Refrigeration and Air Conditioning Conference at Purdue, July 2016, USA.
- K. R. Deutz – Optimisation des chauffe-eau thermodynamiques, 6ème Congrès Français des Pompes à Chaleur INPAC, Paris, France.
- Kevin Ruben Deutz, Odile Cauret, Romuald Rullière, Philippe Haberschill, Multi-criteria Air Source Heat Pump Water Heater optimization combining optimized thermodynamic performance and control, Université de Lyon, EDF R&D, 10th International Conference on System Simulation in Buildings, Liege, December 10-12, 2018.
- Ming Jun Huang, Yan Jun Dai, Nikhilkumar Shah, Christopher Wilon, Neil J.Hewitt, Performance Analysis on Developed EVI Air Source Heat Pump with Seasonal Heat Demand, Ulster University, Shanghai Jiao Tong University, Paper TS-114.4, ICR2019 – 25th IIR International congress of refrigeration, Montréal
- Le, Khoa; Huang, M.J.; Shah, Nikhikumar; Wilson, Christopher; Artain, Paul; Byrne, Raymond; Hewitt, Neil. (2019). High Temperature Air Source Heat Pump Coupled with Thermal Energy Storage: Comparative Performances and Retrofit Analysis. 10th International Conference on Applied Energy (ICAE2018), Hong Kong
- Le, Khoa Xuan; Huang, Ming Jun; and Hewitt, Neil J., Domestic High Temperature Air Source Heat Pump: Performance Analysis Using TRNSYS Simulations (2018). International High Performance Buildings Conference. Paper 315. https://docs.lib.purdue.edu/ihpbc/315
- Khoa Xuan Le, Nikhilkumar Shah, Ming Jun Huang, Neil J. Hewitt, High Temperature Air-Water Heat Pump and Energy Storage: Validation of TRNSYS Models, Proceedings of the World Congress on Engineering and Computer Science 2017 Vol II, WCECS 2017
Journals
Scientific and other Journals published a number of papers by participants. Oak Ridge National Laboratory has a number of papers as they manage the R&D Program on HPWH.
- Kevin Ruben Deutz, b , Gaspard-Louis Charles, Odile Cauret, Romuald Rullière, Philippe Haberschill, Detailed and dynamic variable speed air source heat pump water heater model: Combining a zonal tank model approach with a grey box heat pump model, Université de Lyon, EDF R&D, International Journal of Refrigeration 92 (2018) 55–69.
- Cordin Arpagaus, Daniel Gstöhl, Stefan Bertsch, IEA HPT Annex 46: Domestic Hot Water Heat Pumps, Gut zu Wissen, planer+installateur 06/07-18
- Yasuaki Bando; Hironori Hattori; Yoshiharu Amano, A Status-transition Model for CO2 Heat Pump Water Heater Based on Modified Lorentz cycle. (Waseda University). (2019). International Journal of Thermodynamics. 22. 26-33. 10.5541/ijot.499185.
- Bertsch, Stefan S. & Büchel, Elias. (2017). Idee, Projekt und Produkt – Kompakte und dezentrale Warmwasserbereitstellung, bauRUNDSCHAU, 2017, 2, 34–38.
- Kashif Nawaz, Bo Shen, Ahmed Elatar, Van Baxter, Omar Abdelaziz, R1234yf and R1234ze(E) as low-GWP refrigerants for residential heat pump water heaters, Building Equipment Group, Oak Ridge National Laboratory, International Journal of Refrigeration. 82. 10.1016/j.ijrefrig.2017.06.031
- Kashif Nawaz, Bo Shen, Ahmed Elatar, Van Baxter, Omar Abdelaziz, R290 (propane) and R600a (isobutane) as natural refrigerants for residential heat pump water heaters, Building Equipment Group, Oak Ridge National Laboratory, Applied Thermal Engineering 127 (2017) 870–883
- Kashif Nawaz, Bo Shen, Ahmed Elatar, Van Baxter, Omar Abdelaziz, Performance optimization of CO2 heat pump water heater, Building Equipment Group, Oak Ridge National Laboratory, Oak Ridge,TN 37831 – International Journal of Refrigeration 85 (2018) 213–228
- Elatar, Ahmed; Nawaz, Kashif; Shen, Bo & Baxter, Van; Abdelaziz, Omar. (2017). Characterization of Wrapped Coil Tank Water Heater During Charging/Discharging. ASME 2017 International Mechanical Engineering Congress and Exposition
- K Nawaz, B Shen, A Elatar, V Baxter, O Abdelaziz, “R1234yf and R1234ze (E) as low-GWP refrigerants for residential heat pump water heaters”, International Journal of Refrigeration 82, 348-365
- K Nawaz, B Shen, A Elatar, V Baxter, O Abdelaziz, “R290 (propane) and R600a (isobutane) as natural refrigerants for residential heat pump water heaters”, Applied Thermal Engineering 127, 870-883
- K Nawaz, B Shen, A Elatar, V Baxter, O Abdelaziz, “Performance optimization of CO2 heat pump water heater”, International Journal of Refrigeration 85, 213-228
- M. R. Ally., Vishaldeep Sharma, and Kashif Nawaz. “Options for low–global-warming-potential and natural refrigerants Part I: constrains of the shape of the PT and TS saturation phase boundaries.” International Journal of Refrigeration (2019).
- K. Nawaz, and Moonis R. Ally. “Options for low–global-warming-potential and natural refrigerants Part 2: Performance of refrigerants and systemic irreversibilities.” International Journal of Refrigeration (2019).
Reports
A number of reports have been published by Oak Ridge National Laboratory as they manage the R&D Program on HPWH
- Kashif Nawaz, Bo Shen, Ahmed Elatar, Van Baxter, Omar Abdelaziz, Feasibility Analysis of a Commercial HPWH with CO2 Refrigerant, Building Equipment Group, Oak Ridge National Laboratory, Report for the US Department of Energy under contract DE-AC05-00OR22725, July 2017
- Kyle Gluesenkamp, Viral Patel, Omar Abdelaziz, Bracha Mandel, Valmor de Almeida, High Efficiency Water Heating Technology Development – Final Report Part II: CO2 and Absorption based Residential Heat Pump Water Heater Development, Oak Ridge National Laboratory, Report for the US Department of Energy under contract DE-AC05-00OR22725