1. M. Muntean et al., Fossil CO2 emissions of all world countries - 2018 Report, 2018. 10.2760/30158.
2. European Union, Clean energy for all Europeans, 2019. 10.2833/9937.
3. European Commission, Energy performance of buildings directive, 2021. https://ec.europa.eu/energy/topics/energy-efficiency/energy-efficient-buildings/energy-performance-buildings-directive_en (accessed Apr. 19, 2021).
4. M.J. Alonso, R.K. Ramstad, H. Holmberg, H.T. Walnum, K. Midttømme, G. Andersen, Fjell 2020 high temperature borehole energy storage – system control for various operation modes, in: Accepted at Proceedings World Geothermal Congress 2020, Reykjavik, 2021.
5. Design Considerations for Borehole Thermal Energy Storage (BTES): A review with emphasis on convective heat transfer;Skarphagen;Geofluids,2019