1. Senior Lecturer, Mechanical Engineering Programme, Faculty of Mechanical Engineering and Technology, Univ. Malaysia Perlis (UniMAP), Pauh Putra Main Campus, 02600 Arau, Malaysia; Visiting Academic Researcher, Institute for Energy Systems, School of Engineering, Univ. of Edinburgh, Faraday Building, King’s Buildings, Colin Maclaurin Rd., Edinburgh EH9 3DW, UK (corresponding author). ORCID: .
2. Professor, Institute for Energy Systems, School of Engineering, Univ. of Edinburgh, Faraday Building, King’s Buildings, Colin Maclaurin Rd., Edinburgh EH9 3DW, UK.