Funding for this research was provided by:
National Research Foundation of Korea (NRF-2017R1E1A1A03070560)
The Korea Institute of Energy Technology Evaluation and Planning (KETEP), the Ministry of Trade, Industry and Energy (MOTIE) of the Republic of Korea
Received: 14 May 2019
Accepted: 19 August 2019
First Online: 8 October 2019
: The authors declare no competing interests.