[1] Newcastle Univ, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England
[2] Det Norske Veritas AS, Hovik, Norway
[3] Univ Oslo, Oslo, Norway
[4] Tech Univ Denmark, Kongens Lyngby, Denmark
[5] Tech Univ Denmark, Riso Natl Lab Sustainable Energy, Mat Res Div, Roskilde, Denmark
[6] Natl Tech Univ Athens, Athens, Greece