Book of abstracts: 5th International Conference on Smart Energy Systems in Copenhagen, on 10-11 September 2019.

It is a great pleasure to welcome you to the 5th International Conference on Smart Energy Systems in Copenhagen, on 10-11 September 2019. The conference is organised by Aalborg University – powered by the RE-Invest and sEEnergies projects, the UN Environment District Energy in Cities Initiative, Innovation Fund Denmark and Fonden Energiog Miljødata. The Conference is sponsored by Danfoss, Kamstrup, COWI and Euroheat & Power/DHC+. After last year’s success in Aalborg with 150 presentations and more than 300 participants, we are indeed happy to be able to welcome you to this year’s conference in Copenhagen with 180 presentations and a number of side events. The 5th conference in the series cements it as a main venue for presentations and fruitful debates on subjects that are pertinent to the development and implementation of smart energy systems to fulfil national and international objectives. Once again, we welcome more than 300 participants from more than 30 countries around the world. We wish to thank everyone for your valuable contributions. The 5th International Conference on SES has an expanded focus with new topics within smart energy systems, sustainable energy, electrification of the heat and transport sectors, electrofuels and energy efficiency. The aim of the conference is to establish a forum for presenting and discussing scientific findings and industrial experiences related to the subject of smart energy systems based on renewable energy, 4th Generation District Heating Technologies and Systems (4GDH), electrification of heating and transport sectors, electrofuels and energy efficiency. The Smart Energy System approach was defined in 2011 in the CEESA project. The project addressed Danish scenarios with a particular focus on renewable energy in the transport system in a context with limited access to bioenergy. The Smart Energy System concept is essential for 100% renewable energy systems to harvest storage synergies and exploit low-value heat sources. The most effective and leastcost solutions are to be found when the electricity sector is combined with the heating and cooling sectors and/or the transport sector. Moreover, the combination of electricity and gas infrastructures may play an important role in the design of future renewable energy systems. In future energy systems, combinations of low-temperature district heating resources and heat savings represent a promising alternative to individual heating solutions and passive or energy+ buildings. This change in the heating system also requires institutional and organisational changes that address the implementation of new technologies and enable new markets that can provide feasible solutions to society. All presentations, discussions, talks and debates during the conferences contribute to the understanding and development of future energy systems.