a Materials and Mechanical Engineering, Faculty of Technology, University of Oulu, Oulu, Finland;
b Global Boiler Works Oy, Oulu, Finland;
c Department of Industrial Engineering and Management, School of Engineering Sciences, LUT University, Lappeenranta, Finland;
d Electric Mobility Research Center, Business School, LUT University, Lappeenranta, Finland;
e Laboratory of Machine Design, School of Energy Science, LUT University, Lappeenranta, Finland