1. Department of Energy and Mechanical Engineering, Gyeongsang National University, Cheondaegukchi-Gil 38, Tongyeong, Gyeongnam 650-610, South Korea
2. Department of Marine Engineering, Mokpo National Maritime University, Haeyangdaehang-Ro 91, Mokpo-si, Jeollanam-do, 53060, South Korea
3. Department of Energy and Mechanical Engineering, Institute of Marine Industry, Gyeongsang National University, Cheondaegukchi-Gil 38, Tongyeong, Gyeongnam 650-610, South Korea