Publication

2019

• The keys to succesful geothermal projects
  Reykjavik Geothermal District Heating – A most sophisticated system
  The Westman Islands – Where energy is scarce – an intriguing example of the flexibility of district heating
  Geothermal District Heating in China – An Impressive rise

2015

• Geothermal district heating
  Presentation by Þorleikur Jóhannesson at the DOE workshop in Pittsburgh, August 17, 2015.

2011

• Utilisation of geothermal resources
  Categorisation of geothermal areas
  District heating in Reykjavík
  Hellisheiði Power Plant and hot water main
  Reykjanes power plants
  Svartsengi Resource Park
  Snow melting in Reykjavík

2016

• How policy, technology and innovation can foster geothermal district heating development.
  An Icelandic case study. EGC 2016 – European Geothermal Congress.
  Þorleikur Jóhannesson (Verkís), Carine Chatenay (Verkís), Hildigunnur H. Thorsteinsson (Reykjavík Energy), Ívar Atlason (HS Veitur), Albert Albertsson (HS Veitur).

2015

• Optimisation of intake trashracks.
  Hydro conference 2015.
  S. Bjarnason (Verkís), H. Jóhannesson (Landsvirkjun).
• IDDP-2 Well Head Equipment and Test Setup.
  World Geothermal Congress 2015.
  Oskar P. Einarsson (Verkís), Thorleikur Johannesson (Verkís), Albert Albertsson (HS Orka), Geir Thorolfsson (HS Orka), Gudmundur O. Fridleifsson (HS Orka).
• Common area control system for 6 hydropower plants, 935 MW – The Þjórsá and Tungnaá area in Iceland
  Hydro conference 2015.
  The Þjórsá and Tungnaá area in Iceland, J. Pálmason (Verkís), V. Knútsson (Landsvirkjun), D. V. Loftsson (Landsvirkjun).

2014

• Hydropower project in artic area – Greenland.
  Hydro conference 2014.
  Æ. Jóhannsson (Verkís), S. H. Sigurðsson (Verkís), G. Guðmundsson (ISTAK). See more, the Ilulissat hydropower plant in Greenland.

2011 

• Calculation of minimum water flow through a hydropower tunnel required to prevent freezing in permafrost rock near Ilulissat, Greenland, using a transient, three-dimensional heat transfer model.
  The International hydro power conference in Prague, Czech Republic, October 2011.
  A paper by O. P. Einarsson, Æ. Jóhannesson and K. M. Sigurjónsson presented.
• Converting wall roughness to hydraulic roughness in fully turbulent pipe flow: Small-scale experiments and large-scale measurements at the Kárahnjúkar HEP, Iceland.
  The International Journal on Hydropower & Damsional, HYDRO Prague, Czech Republic, 2011.
  A paper by K. M. Hákonardóttir, P.R. Pálmason, A. Kasprzyk og K. Filipek, published.

2010

• Asymmetric sudden enlargement energy dissipater in Jökulsá Tunnel of the Kárahnjúkar HEP in Iceland.
  The International hydro power conference in Lisbon, Portugal, September 2010.
  A paper by Th. S. Leifsson and A. Bauman presented.

2009

• Geothermal Energy as Replacement for Oil and Gas – A Proven Option among the Renewables.
  The 5^th International Oil and Gas Conference. Sibenik, Croatia, September 29^th-October 1, 2009.
  A lecture on Geothermal energy by O. B. Björnsson, Ph.D given.
• Heat pump enhanced district heating in low-temperature geothermal areas.
  The International Geothermal Days, Slovakia 26^th to 29^th May 2009. Častá Papiernička Slovakia.
  A lecture held by O. B. Björnsson, Ph.D.
• Reliable power delivery from a powerstation dedicated to a single user.  The Kárahnjúkar Powerstation in Iceland.
  The International hydro power conference in Lyon, France, October 2009.
  A paper by H Th Helgason, A. Benediktsson, K M Sigurjonsson and S I Olafsson presented.

2006

• Geothermal energy price issues: Selling and pricing – Various ways to sell heat, comparison between methods.
  Xianyang Geothermal Conference 2006.
  An article by Th Erlingsson, Th Johannesson, C Chatenay and Th S. Olafsson.