Kjell Heinrich, Norwegian University of Science and Technology, Trondheim, Norway, Jørgen Røysland Aarnes, Norwegian University of Science and Technology, Department of Energy and Process Engineering, Trondheim, Norway, Nathan Kutz, University of Washington Seattle Campus, Departments of Applied Mathematics and Electrical & Computer Engineering, Seattle, United States and Simen Ellingsen, Norwegian University of Science and Technology, Energy and Process Engineering, Trondheim, Norway