Workshop meeting in Seoul Intercontinental Hotel 16th May 2019
Before the 7th Working Meeting for the Annex a workshop was held to inform Korean experts about the Annex work.
In the workshop the speakers were from the participating countries while the main attendants were from Korea and its National Team for the Annex.
Onno Kleefkens M.Sc. – Introduction on the HPT Annex 46 – An overview was given of the work under Annex 46 to introduce the Korean participants to the contents and diversity of the subject ranging from test procedures to fundamental research.
Prof. Minsung Kim – IEA Heat Pumping Technology TCP – Mission for a Green World – An overview was given of the work done under the TCP-HPT and the importance for Korean participation in this work and in a number of Annexes. The market challenge for buildings in Korea focuses on ZEB and on the HVAC demands for increasingly more concentrated population.
Attention was given to the upcoming 13th IEA Heat Pump Conference in Jeju 2020.
Prof. Kyioshi Saito – R&D on Heat Pump Water Heaters – An overview of the history and results of DHW Heat Pumps R&D in Japan was given. In Japan, the development of domestic heat pump water heaters started in 1986 showing that consistent policy on the long term delivers results. A number of Japanese manufacturers have done fundamental work on components and application, resulting in more than 600 million systems in the market of Eco-Cute heat pumps with markets on this technology developing world-wide.
Dr. Kashif Nawaz – Max Tech Efficiency Electric HPWH with low-GWP Halogenated Refrigerant – A Research project on DHW Heat Pumps running at Oakridge focusing on two major aspects for the development of next generation heat pump water heating technology:
- Deployment and performance optimization for hydroflourolefins as alternate refrigerants to substitute conventional working fluids (R134a).
- Design and optimization of individual components and overall system to maximize the performance (Unified Energy Factor- UEF and First Hour Rating-FHR
Dr. Cordin Arpagaus – Test Procedures for Heat Pump Water Heaters – The European test procedures for Heat Pump Water Heaters were presented and the major differences between test methods in use in different regions of the world. There is no single «best» test method, which could be adopted for global use – all have their advantages and disadvantages.
Harmonization of test procedures is urgently needed for global market development.
In an ideal form of harmonization, testing authorities in each economy would be able to take the results from any of the existing HPWH tests, and use a simulation model to predict what the results would be if the same model were physically tested to their own standard. However, this ideal is not likely to be attainable (citing the SEAD report from 2013). Yet, ISO Working Group 12 on Heat pump water heaters of ISO Technical Committee 86/SC 6 proposed a harmonization framework, including standardized physical tests and a staged development of simulation methods.
Prof. Neil Hewitt – Hot Water Heat Pumps – UK Country Report – A number of application examples in the UK were given as well as the R&D project at Ulster University was presented.
Onno Kleefkens M.Sc. – Domestic Hot Water in Multifamily Buildings – The big challenge for hot water heating in many countries and especially in Korea is existing multi-family buildings. In the presentation a number of alternative solutions with heat pumps were presented, where the clear challenge in large collective systems is to avoid Legionella contamination. Good models are needed for calculating and assessing systems for heating domestic water in buildings, as hot water becomes the dominant energy demand in future domestic applications:
- Many energy models for buildings use generic and old figures for the calculation, in which often flat-rate values are used, such as floor areas for the calculation of the use of tap water.
- Innovative concepts are often not in the models (fresh water, booster, solar combi, etc.)
- A comparative calculation model for multi-family buildings is missing, taking into account the strategic control options