来自产业联盟SEA/LNG的一项研究表明，用液化天然气替代现有燃料的改装方案，是现有超大型原油运输船（VLCC）改装的最优解，它有利于船舶更好地应对将于2023年生效的环境新规。在该项研究中，SEA/LNG将三个改装方案进行了比较：

（1）改装为LNG燃料发动机

（2）使用重质燃油，加装脱硫塔

（3）使用超低硫燃油

依照碳强度指标评级，LNG组表现最好。研究预计，改装后的船舶将保持在B级，直到2027年才滑入C级，最终在2032年滑落至D级。考虑到今后可能会在航运业引入碳定价，使用液化天然气燃料的船东可能会得到财政补贴。

Retrofitting existing very large crude carriers(VLCC) to run on LNG as fuel has enormous benefits over alternative options to future-proof the ships from becoming obsolete as new environmental regulations take the stage in 2023, a new study from the multi-sector industry coalition SEA/LNG claims. In the study, compared three scenarios in an investment case study,  including an LNG retrofit, a scrubber-fitted VLCC running on heavy fuel oil, and a conventional VLCC sailing on very low sulphur fuel oil(VLSFO). When it comes to meeting the Carbon Intensity Index(CII), LNG performs best, it would maintain rating B until it slides into C mid-2027 before finally slipping to D in 2032. LNG retrofit offers financial incentives to ship owners with regard to future fuel prices, especially taking into account the likely introduction of carbon pricing in shipping.

Website Link：

https://www.offshore-energy.biz/sea-lng-builds-case-for-retrofitting-vlccs-to-lng/